Physics Questions and Answers September 05, 2022

Two circular rods, both of length L and having the same diameter, are placed end to end between rigid supports with no initial stress in the rods. The coefficient of linear expansion and Youngs modulus for rod A are a and Y respectively those for rod B are ab and YB respectively. Both rods are normal materials with a 0. The temperature of the

Correct answer is -j. Please explain clearly which equation was used or how did you determine that answer. Thanks.

19. If a proton travels along the xaxis in the xdirection (2), what is the direction of the magnetic field it generates at point (x, y, z) (0, 0, 2 mm) as it travels through the origin. A. B. k C. 3 D. k

A parallel-plate capacitor is charged by a 17.0 V battery, thenthe battery is removed. What is the potential difference betweenthe plates after the battery is disconnected? What is the potentialdifference between the plates after a sheet of Teflon is insertedbetween them?

Which of the following statements aretrue concerning a stable nucleus? Check all thatapply. Check allthat apply. There is a limit to thesize of a stable nucleus because of the short range of the strongnuclear force. A stable nucleus containsa larger number of neutrons than protons. There is no limit to thesize of a stable nucleus because of the

The gravitational force between two objects of masses m 1 and m 2 that are separated by distance r is? a: proportion to r b:proportional 1/r c:proportional 1/r^2 d:(m1+m2)g d:(m1+m2)G equation is U=-Gm1*m2/r Problem is is that I want to choose B as my answer but A also sounds correct. Which one is right?

Five loops are formed of copper wire of the same gauge(cross-sectional area). Loops 1-4 are identical; Loop 5 has thesame height as others but is longer. At the instant shown, all theloops are moving at the same speed in the directions indicated. There is a uniform magnetic field pointing out of the page inregion I; in Region II there is no

An object at 20 o C absorbs 25.0 J of heat. What is the change inentropy S of the object? Express your answer numerically in joulesper kelvin. An object at 500 K dissipates 25.0 kJ ofheat into the surroundings. What is the change inentropy S of the object? Assume that thetemperature of the object does not change appreciably in theprocess. Express

Which of the following statements are true? Select all correct responses. The total momentum of any number of particles is equal to the vector sum of the momenta of the individual particles. The total momentum of any number of particles is equal to the algebraic sum of the momenta of the individual particles. The vector sum of forces acting on a

A microwave oven operates at 2.4 GHz with an intensityinside the oven of 2600 W/m2 . Part A What is the amplitude of the oscillating electric field? Part B What is the amplitude of the oscillating magnetic field?

Which of the following properties is absolute and independent offrame of reference? The time for a particular kind of subatomic particle todecay The mass of a particular kind of subatomic particle The speed of light The size of Earth C and D

For a hydrogen atom in its ground state, use the Bohr model to compute each of the following. (a) the orbital speed of the electron v1 = m/s (b) the kinetic energy of the electron KE1 = eV (c) the electrical potential energy of the atom PE1 = eV

When a honeybee flies through the air, it develops a charge of+14pC. How many electrons did it lose in the process of acquiringthis charge? Express your answer as a number of electrons.

Which of the following statements are true concerningelectromagnetic waves in a vacuum? Check all that apply Electromagnetic waves travel in a vacuum with a definite andunchanging speed. Electromagnetic waves can travel in a vacuum only because amedium prohibits the forward propagation of the electric andmagnetic fields. When electromagnetic waves

Four resistors are connected to a battery as shown in the figure below. www R2R R R Need Help R3R (a) Determine the potential difference across each resistor in terms of E. (Use the following as necessary for E.) AV AV AV3 AV4 R3 4R www (b) Determine the current in each resistor in terms of I. (Use the following as necessary I.) I I2 I3

Which of the following statements about inductors are correct? A) When an inductor and a resistor are connected in series with a DC battery, the current in the circuit is reduced to zero in one time constant B) When it is connected in a circuit, an inductor always resists having current flow through it C) An indcutor always resists any change in

Which of the following statements are true for an adiabaticprocess? During an adiabatic process, the internal energy of the systemchanges. An adiabatic process is carried out at constant volume. An adiabatic process is carried out at constanttemperature. During an adiabatic process, there is no heat transfer into orout of the system. An adiabatic

Four massspring systems oscillate in simple harmonic motion.Rank the periods of oscillation for the massspring systems fromlargest to smallest. m = 2 kg , k = 2 N/m m = 2 kg , k = 4 N/m m = 4 kg , k = 2 N/m m = 1 kg , k = 4 N/m

At what height h above the ground does the projectilehave a speed of 0.5 v ? Express your answer in terms of v and the magnitude ofthe acceleration of gravity g .

An infinite line of charge with linear density A1 7Cm is positioned along the axis of a thick conducting shell of inner radius a 3.4 cm and outer radius b 5.1 cm and infinite length. The conducting shell is uniformly charged with a linear charge density A2 4.6 Cm. 1) What is Ex(P), the electric field at point P, located at (x,y) (11.7 cm, 0

Part A At what angle 8 to the normal would the first dark ring be observed answer is .442 Part B Suppose that the light from the pinhole projects onto a screen 3 meters away. What is the radius of the first dark ring on that screen Notice that the angle from Part A is small enough that sinestane. Answer is 23.2mm Part C The first dark ring forms

Which of the following will have units of meters? Select allthat apply. a) vr b) v 2 c) v delta t d) a t e) 2ar f) 1/2 a ( t 2 ) g) v/ t

Which of the following statements about Gauss's law are correct?(There may be more than one correct choice.) The electric flux passing through a Gaussian surface dependsonly on the amount of charge inside that surface, not on its sizeor shape. If a Gaussian surface is completely inside an electrostaticconductor, the electric field must always be

When your friend flies by you in a spaceship at half the speedof light, you observe that a Time passes more slowly in her spaceship. b Time passes more quickly in her spaceship. c Time passes at the same rate in her spaceship as for you.

Which of the following is true about the watertable? A. The water table has a similar shape to topography but is moresubdued. B. The water table is highest in elevation beneath lakes. C. In any area, the water table slopes a consistent amount anddirection. D. All of the above. E. None of these.

Part A Quantity A of an ideal gas is at absolutetemperature T , and a second quantity B of the samegas is at absolute temperature 2 T . Heat is added toeach gas, and both gases are allowed to expand isothermally. If b oth gases were initially atthe same absolute temperature, would they still undergo the sameentropy change? No, gas A would undergo

Which of the following statements about phases of the Moon aretrue? Select all that apply. at new moon, the Moons entire surface is engulfed indarkness if its new moon, the Moon will rise in the middle of the day at new moon, the half of the Moon facing the Sun is fullyilluminated the time between first-quarter moon and third-quarter moon isabout

What would be the impact of the following on the overall economy if there was an annual wealth tax paid on total assets for individuals and couples with net worth in excess of $250,000,000. How would this effect the economy, the national debt, long term interest rates, etc.

Which of the following statements are true according toHeisenberg's uncertainty principle? Check all that apply. 1)There is a limit to the accuracy of certain measurements.This limit restricts how well measuring instruments can beconstructed. 2)The unavoidable interaction between the thing to be observedand the observing instrument accounts for

Mark each of the following statementsas true or false. If a statement refers to "two objects"interacting via some force, you are not to assume that these twoobjects have the same mass. Every force has one and only one 3rd law pair force. true or false? The two forces in each pair act in opposite directions. true or false? The two forces in each

Which of the following statements are true for an isothermal process? During an isothermal process, the work done by the gas equals the heat added to the gas An isothermal process is carried out at constant pressure. An isothermal process is carried out at constant temperature. An isothermal process is carried out at constant

An orthodontic spring, connected between the upper and lowerjaws, is adjusted to provide no force with the mouth open. When thepatient closes her mouth, however, the spring compresses by 6.0 mm.What force is exerted if the spring constant is 160N/m?

Which graphs represent an object that is slowing down? A. 2 and3 B. 2 and 4 C. 1 and 4 D. 1 and 2 E. 1 and 3 F. 3 and 4

1.0 Velocity (ms) Velocity (ms) 0.0 0 1.0 0.5 0.0 0 2 2 4 (1) (3) 6 Time (s) 00 8 8 00 10 10 0.0 0.5 1.0 0 0.0 0.5 1.0 0 C 2 (2) 6 Time (s) 8 8 00 OT 10

Large electric fields in cell membranes cause ions to movethrough the cell wall. The field strength in a typical membrane is1.0 x 10 7 N/C. What is the magnitude of the force on a calcium ionwith charge +e? What is its acceleration? Is it possible for a particle with the same charge as as calciumto have a different acceleration if placed at this

Which of the following are functions of the eyepiece lens of a refracting telescope? Check all that apply. A to produce an image whose angular size is greater than that of the object B to magnify the image produced by the objective lens C to reverse the orientation of the image produced by the objective lens D to form an image at the focal point

Which of the following statements are true concerningelectromagnetic radiation fields? Check all that apply The electric and magnetic fields at any point are parallel toeach other. The electric and magnetic fields are phase-shifted 180 withrespect to each other as they propagate through space. The magnetic field at any point is perpendicular to

(Figure 1) shows the angular position of a potter'swheel. A.) What is the angular displacement of the wheelbetween t =5 s and t = 15 s? Express your answer in radians. B.) What is the angular velocity of the wheelat 15 s? Express your answer in radians per second. C.) What is the maximum speed of a point on the outside of thewheel 15 cm from the

0 (rad) 75 50 25 5 10 15 t(s) 20

Which of the following is an inertial reference frame? Check all thatapply. Check allthat apply. a reference frame that ismoving downward at a constant speed a reference frame that ismotionless a reference frame that isrotating at a constant speed a reference frame that ismoving upward at a constant speed

What force per unit area is water capable of exerting on acontainer when it freezes? (It is acceptable to use the bulkmodulus of water, B = 2.2 10 9 N/m 2 , for this problem.) Give your answer inN/cm 2 .

Hold your arm outstretched so that it is horizontal. Estimate the mass of your arm and the position of its center of gravity. What is the gravitational torque on your arm in this position, computed around the shoulder joint?

The graph in the figure shows the current through a 1.0ohmresistor as a function of time. A. How much charge flowed through the resistor during the 10 sinterval shown? (Answer in C) B. What was the total energy dissipated by the resistor during thistime? (Answer in J)

I (A) 2.5 2.0 1.5 1.0 0.5 0 0 2 4 6 8 t (s) 10

A man out walking his dog makes one complete pass around a perfectly square city block. He starts at point A and walks clockwise around the block. (Figure Below) Let be the displacement vector from A to B, be the displacement vector from B to C, etc. Part A Which of the following vectors is equal to ? only only only All of the above None of the

A heavy flywheel is accelerated (rotationally) by a motor that provides constant torque and therefore a constant angular acceleration a. The flywheel is assumed to be at rest at time t0 in Parts A and B of this problem. Part A Find the time t1 it takes to accelerate the flywheel to w1 if the angular acceleration is a. Express your answer in terms

A loop of wire carries a current. The resulting magnetic field__________. points toward the loop at all points points away from the loop at all points is similar to that of a bar magnet in the plane of theloop is similar to that of a bar magnet perpendicular to the planeof the loop

To practice Problem-Solving Strategy 5.2 Dynamics problems.A 30.0kg- box is being pulled across a carpeted floor by a horizontal force of 230N, against a friction force of 210N . What is the acceleration of the box? How far would the box move in 3s, if it starts from rest?

Given a block of glass that is semi-circular, a laser pointer,protractor/ruler, and index card, design your own experiment toobserve and measure total internal reflection. Describe how youwould shine the laser onto the glass block, what angles you wouldmeasure and how you would determine the critical angle from yourmeasurements.Draw the block of

Contecria Lecross 183 1622 suby x 21 Jadw 3912 0.8

If you place a charged object next to an uncharged object thatis a conductor, If you place a charged object next to an uncharged object thatis a conductor, A) The force depends on whether the charge is positive ornegative. B) There is no force between the two objects. C) There is an attractive force between the two objects. D) There is a repulsive

Which of the following statements are true as a block of icemelts? Check all that apply. The temperature of the ice/water system decreases. The temperature of the ice/water system remains constant. Heat energy leaves the ice/water system. Heat energy enters the ice/water system. The temperature of the ice/water system increases.

A monochromatic laseris exciting hydrogen atoms from the n =2n=2 state to the n =5n=5 state. Part A What is the wavelength ? of the laser? Express your answer to three significant digits innanometers. Part B Eventually, all of the excited hydrogen atoms will emit photonsuntil they fall back to the ground state. How many differentwavelengths can be

A) Find the current through the battery in the circuit shown inthe figure (Figure 1) . B) Find the current through the resistor R1 in thecircuit. C) Find the current through the resistor R2 in thecircuit. D) Find the current through the resistor R3 in thecircuit. E) Find the current through the resistor R4 in thecircuit. F) Find the current

14.0 V 1.00 R, 1.00 R 3R2 2.00 R4 2.00 R, 1.00

An all female guitar septet is getting ready to go on stage. The lead guitarist, Kira,who is always in tune, plucks her low E string and the other six members, sequentially, do the same. Each member records the initial beat frequency between her low E string and Kira's low E string. To tune an instrument using beats, more information than just the

What is the distance between m =0 and m = 1 bright fringes?A laserbeam of wavelength 710 nm shines through a diffraction grating thathas 750 lines/mm and observed on a screen 1.4 m behind thegrating. I have tried 0.830 m but it is not correct.

Four cars undergo acceleration as described by the data in thefollowing table. Car Initial Velocity (m/s) Final Velocity (m/s) Time period (s) A 2.0 11.0 3.0 B -5.0 3.0 2.0 C 1.0 -5.0 2.0 D 0.0 25.0 10.0 Rank the accelerations from most positive to most negative.

Four wires are made of the same highly resistive material, cut to the same length, and connected in series. Wire 1 has resistance R1 and crosssectional area A. Wire 2 has resistance R2 and crosssectional area 2A. Wire 3 has resistance R3 and crosssectional area 3A. Wire 4 has resistance R4 and crosssectional area 4A. A voltage VO is applied across

Four masses are arranged as shown in the figure. 1) Determine the x and y components of the gravitational forceon the mass at the origin (m). Express your answer in terms of the variables:m,x0, y0, and G. 2) Write the force in vector notation. Express your answer in terms of the variables: m,x0,y0, and G. and the unit vectors i and j.

Yo m 4m XO XO 3m yo 2m X

What is the purpose of the rheostat in this experiment? 1) tolimit the current in the circuit. 2) to overheat. 3) as an aid toadjusting the current in the circuit. 4) it is the resistor whoseresistance is to going to be determined. Group of answer choices 3 and 4 1 and 2 1 and 3 4 only 2 and 3

(a) (b) (c) (d) (e) (f) The table below depicts the WBS Dictionary for a software development project Task Task A Duration (days) Dependency Resource Worker 1 Worker 1 Worker 2 Task D Worker 2 Task E Worker 3 Task F Worker 2 Task G Worker 1 Using any appropriate technique, calculate the duration of the project. Draw the resource usage graph for

The inverting amplifier in the figure is ideal with a gain of 4. 1- Determine R i n . 2- Determine the range of input voltages that will keep the opamp in its linear operating region. 3- Suppose you wish to amplify a 6 V signal, using your design from part A with a variable feedback resistor. What is the largest value of feedback resistance that

It is given that vectors AB(51.4 m) C (62.2 m) ABC (13.8 m) Find the vector A. Find the vector B.

A hurricane wind blows across a 8.00m16.0m flat roofat a speed of 140 km/h . Part A: Is the air pressure above the roof higher or lower than thepressure inside the house? Pick one. Explain. The pressure above the roof is lower due to the lower velocityof the air. The pressure above the roof is lower due to the higher velocityof the air. The

In the impulse approximation , __________. a. the forces between colliding objects can be neglected b. no external forces act on the system c. the true impulse is approximated by a rectangular pulse d. external forces can be neglected during the time theimpulsive force acts

Images Produced by Different Concave Mirrors ConceptualQuestion The same object is placed at differentdistances d in front of six different concavespherical mirrors. Each mirror has the focallength f listed below. Part A Which, if any, of these scenarios produce a real image? Which,if any, of these scenarios produce a virtual image? Sort the

Ilya and Anya each can run at a speed of 7.30 mph and walk at a speed of 3.40 mph. They set off together on a route of length 5.00 miles. Anya walks half of the distance and runs the other half, while Ilya walks half of the time and runs the other half. How long does it take Anya to cover the distance of 5.00 rm{miles}? Express the answer

Given any two vectors, which statment below is correct? a)The Magnitude of the sum of the two vectors can not bezero b) The Magnitude of the sum of the two vectors is always smallerthan either vector c) The Magnidue of the summ of the two vectors is always largerthan either vector d) The sum of the two vectors cannot be perpendicular to bothvectors

Which of the following statements are true regarding electric generators? Check all that apply. An electric generator creates a time-dependent induced voltage. An electric generator is used to increase or decrease an alternating current voltage. An electric generator converts mechanical energy into electrical energy. An electric generator converts

Which of the following statements are true concerning compoundmicroscopes? In a compound microscope, the image formed by the objectivelens is smaller than the object. In a compound microscope, the final image is formed bythe objective lens. The focal length of the objective in a microscope is verylarge compared to the focal length of the eyepiece.

Which of the following statements about the force attractingthese two galaxies is true? A) The force will get weaker as time passes. B) It is amysterious force, whose nature remains completely unknown toscientists. C) It is a force unlike any force that we everexperience on Earth. D) It is the same force that causes an appleto fall to the ground.

Consider the case in which the proportionality constant C is equal to 1. Plot the graph of y x. add graph Submit Y 10 0 add points Request Answer delete graph i graph info 5 I reset help 10

Dielectrics and Capacitance Ranking Task Review Constants Six parallelplate capacitors of identical plate separation have different plate areas A, different capacitances C, and different dielectrics filling the space between the plates. Below is a generic diagram of what each one of these capacitors might look like. (Figure 1) Figure 1 of 1

Determine the work done on the object during each of the four intervals AB, BC, CD, and DE.

(Figure 1) is the kineticenergy graph for a 2.0 kg object moving along the xaxis. Figure K (J) 4 2 0 1 of 1 t A B C D E Part A Determine the work done on the object during each of the four intervals AB, BC, CD, and DE. Express your answers using one significant figure. Enter your answers numerically separated by a comma. WAB, WBC, WCD, WDE Submit

Each of the following vectors is given in terms of its x- andy-components. A) vx = 25 m/s , vy = 37 m/s. Find the vector'smagnitude. B) vx = 25m/s , vy = 37m/s . Find the vector'sdirection. Express your answer using two significant figures. C) ax= 8.0 m/s^2 , ay = -6.5 m/s^2 . Find the vector's magnitude. D) ax= 8.0 m/s^2 , ay = -6.5 m/s^2 . Find

Let A? =4?^?2?^, B? =?3?^+5?^,and E? =2A? +3B? . Part A Write vector E? in component form. Express your answer in terms of the unitvectors i^ and j^. Use the 'unit vector' button todenote unit vectors in your answer. E? E ? = ?i+11j SubmitPrevious AnswersRequest Answer Incorrect; Try Again; One attempt remaining The correct answer does not

Which of the following statements are true about the motion of an object? A force perpendicular to the momentum changes the direction of the momentum but not its magnitude. To change the magnitude of the momentum you need to apply a force parallel to the momentum (either in the same direction as the momentum or the opposite direction). To make an

Part A What is the strength of the electricfield E p 1.0 mm from a proton? Express your answer to two significant figures and include theappropriate units. E p = Part B What is the direction of the electric field? toward proton away from proton Part C What is the strength of the electricfield E e 1.0 mm from an electron? Express your answer to two

A light ray travels inside a block of sodium fluoride that hasindex of refraction n = 1.33 as shown in (Figure 1) . The raystrikes the vertical wall at the critical angle, totally reflects,and then emerges into the air above the block. What is theangle ? 2 at which the ray emerges?

0

If the kinetic energy of the block is increasing, theblock must be Consider the block in the process of oscillating. at theequilibrium position. at theamplitude displacement. moving tothe right. moving tothe left. movingaway from equilibrium. movingtoward equilibrium.

I need help with a few introductory physics prelabquestions. 1) An object moves 15 meters in 3 seconds. What is its velocity(in m/s)? 2)What is the velocity (in cm/s) of an object which moves 44 min 2 s? 3) The charge of an electron is -1.60x10-19 C. Determine thecharge to mass ratio of the electron (in 1011 C/kg). (Hint: dividethe electron's

A lens creates an image as shown. In this situation, the objectdistance s is Larger than the focal length f . ? Smaller than focal length f . ? Equal to the focal length f . ?

Real image

a) What is the linear speed of a point on the equator, due to the Earth's rotation? Please answer in m/s b) What is the linear speed of a point on the Arctic Circle (latitude 66.5 degrees N)? Please answer in m/s c) What is the linear speed of a point at a latitude of 19.0 degrees N? Please answer in m/s

Learning Goal: To learn to apply the concept of current density and microscopic Ohm's law. A slab of metal of volume V is made into a rod of length L . The rod carries current I when the electric field inside is E. A)Find the resistivity of the metal P. B)The rod is now stretched so that its length is doubled. If the electric field remains the

The lowest frequency in the audible range is 20 Hz. a)What is the length of the shortest open-open tube needed to produce this frequency? b)What is the length of the shortest open-closed tube needed to produce this frequency?

When a mass M hangs from a vertical wire of length L, wavestravel on this wire with a speed V. If you could explain how you got the answers and the logic thatwould be awesome and I'll award you the points! Thank you! A. what will be the speed of these waves if we triple M withoutstretching the wire? B. what will be the speed of these waves if we

The lowest pressure ever obtained in a laboratory setting is4.010?11 Pa. At this pressure, how many molecules of air would there be in a50 ?C experimental chamber with a volume of 0.020 m3 ? Express your answer using two significant figures.

Rank these throws based on the amount of time it takes the ball to hit the ground. Rank from largest to smallest. To rank items as equivalent, overlap them. 10 m/s 60 degree angle 15 m/s 45 degree angle 20 m/ s 0 degree 10 m/s 90 degree angle 15 m/s 30 degree angle 15 m/s 60 degree angle

What is the length, r m , of the moment arm of the force F about point p in terms of r and ? Find the torque about p due to F. Your answer should correctly express both the magnitude and sign of torque. Express your answer in terms of r m and F or in terms of r, , and F.

P Im 16

Learning Goal To be able to calculate work done by a constant force directed at different angles relative to displacement If an object undergoes displacement while being acted upon by a force (or several forces), it is said that work is being done on the object. If the object is moving in a straight line and the displacement and the force are

To learn about the Work-Energy Theorem and its basicapplications. In this problem, you will learn about the relationship betweenthe work done on an object and the kinetic energy of thatobject. The kinetic energy K of an object of mass m moving at a speed v is defined as K =(1/2) m v 2. It seems reasonable to saythat the speed of an object--and,

Light bulbs are typically rated by their power dissipation when operated at a given voltage. Which of the following light bulbs has the largest current through it when operated at the voltage for which it's rated? (a) 3.2 W, 6.0 V (b) 24 W, 12 V (c) 16 W, 18 V (d) 32 W, 24 V

Let vectors A? =(1,0,?3), B? =(?2,5,1), and C? =(3,1,1).Calculate the following, expressing your answers as ordered triples(three comma-separated numbers). A) B? C? = B) C? B? = C) (2B? )(3C? ) = D) A? (B? C? ) = E) A? ?(B? C? ) = F) |V? 1V? 2| = G) |V? 1V? 2| = Please show all work.

A large fish hangs from a spring balance supported from the roofof an elevator. a) If the elevator has an upward acceleration of 2.45m/s2 andthe balance reads 70.0N , what is the true weight of the fish? b) Under what circumstances will the balance read 35.0N ? c) What will the balance read if the elevator cable breaks?

A lens produces a real image of a real object. a) Is the image inverted or upright? b) Is the lens diverging or converging? c) Is the image enlarged or reduced in size? d) If two convex lenses identical in size and shape aremanufactured from glass with two different indices of refraction,would the focal length of the lens with the greater index

Learning Goal: To understand the application of the general harmonic equationto finding the acceleration of a spring oscillator as a function oftime. One end of a spring with spring constant k isattached to the wall. The other end is attached to a block ofmass m . The block rests on a frictionless horizontalsurface. The equilibrium position of the

An impala is an African antelope capable of a remarkablevertical leap. In one recorded leap, a 45 kg impala went into adeep crouch, pushed straight up for 0.21 s, and reached a height of2.5 m above the ground. To achieve this vertical leap, with what force did the impalapush down on the ground? Express your answer to two significant figures

If the net work done on an object is positive, what can you conclude about the object's motion? The object is speeding up. The object is moving with a constant velocity. The object is slowing down. The object is at rest; its position is constant.

MLK LLC has sold shoes for over 112 years. The company currently has debt equity of 1:9 and tax rate of 49%. The required return of the firms levered equity is 15%. The company is planning an expansion in its production capacity. They will buy an equipment that is expected to generate the following unlevered differential free cash flows. At year 0

Lake Erie contains roughly 4.00 x 1011 m of water. (a) How much energy is required to raise thetemperature of that volume of water from 9.0C to 12.0C 1 (b) How many years would it take to supply this amount of energy byusing the 1100MW exhaust energy of anelectric power plant yr

The intensity of sunlight at the Earth's distance from the Sun is 1370 W/m 2 . (a) Assume the Earth absorbs all the sunlight incident upon it. Find the total force the Sun exerts on the Earth due to radiation pressure. 1 (b) Explain how this force compares with the Sun's gravitational attraction. Strength______________ times stronger

You know that a collision must be "elastic" if: The colliding objects stick together The sum of the final kinetic energies equals the sum of the initial kinetic energies There is no change in the internal energies of the objects (thermal energy, vibrational energy, etc.) The colliding objects are stretchy or squishy The momentum of the two-object

An object moves along the x axis during four separate trials. Graphs of position versus time for each trial are shown in the figure. During which trial or trials is the object's velocity not constant? During which trial or trials is the magnitude of the average velocity the largest?

Figure 1 of 1 Trial A Trial C t t Trial B Trial D

Which of the following best describes how to calculate the average acceleration of any object? a. Average acceleration is always halfway between the initial acceleration of an object and its final acceleration. b. Average acceleration is always equal to the displacement of an object divided by the time interval. c. Average acceleration is always

Fields of an electron At a particular instant a proton is at the origin, moving with velocity 5 x 104, 4 104, 6 x 104 ms. At this instant (a) What is the electric field at location 3 x 10, 3 x 10, 3 x 10 m, due to the proton E 3.078e5 3.078e5 3.078e5 NC (b) What is the magnetic field at the same location due to the proton B 7.128e18 X