Physics Questions and Answers September 04, 2022

Estimate the pressure exerted on a floor by ( a ) one pointed heel of area = 0.45 cm 2 , and ( b ) one wide heel of area 16 cm 2 . The person wearing the shoes has a mass of 56 kg. answers are: (a) 6.1 x 10^6 N/m^2 (b) 1.7 x 10^5 N/m^2

If the electric potential at some point is large, is theelectric field at that point also necessarily large or not? Explainyour answer, and provide a counterexample if not. Assume the electric field E in some region is uniform: it is thesame at all points. Specifically, E has a magnitude of 5 V/m andpoints in the +x direction. What can you then

Which of the following point towards the center of the circle inuniform circular motion? A.) Acceleration, net force B.) Velocity,acceleration, net force C.) Acceleration D.) Velocity, net force E.) Velocity, acceleration

3 4 pt An airplane is flying with a speed of 247 kmh at a height of 4000 m above the ground. A parachutist whose mass is 93.4 kg, jumps out of the airplane, opens the parachute and then lands on the ground with a speed of 3.30 ms. How much energy was dissipated on the parachute by the air friction (in MJ)

3. What simple way of interpreting astronomi cal observations did Copernicus advocate

10.65 Using the expression for the source follower f in Eq. (10.107) show that for situations in which C, 0, R is large, and R, is small, fHfP1 1 1 2b, 27 RgCd sig C 1g Ri Find f, for the case R 8m 5 mAV, C 12 pF, and C 0.1 pF. 100 , R, 2 , r 20 , (10.107)

10.65 Using the expression for the source follower f in Eq. (10.107) show that for situations in which C, 0, R is large, and R, is small. fHSPI 1 2n R Rif (Cad sig Find f for the case Rug 100 , R, 8m 5 mAV, C 12 pF, and C 0.1 pF. 2b, C 18 R 2 k2, r 20 km2. (10.107)

Figure 1 shows a harmonic oscillator at four different moments, labeled A, B, C, and D. Assume that the force constant k, the mass of the block, m, and the amplitude of vibrations, A, are given. We will also assume that there are no resistive forces so the total energy of the oscillator remains constant. In part (d) to part (h),when asked ?which

AA www. www.m O A2 A m m

?The (Figure 1) shows two thinbeams joined at right angles.The vertical beam is 12.0kgand 1.00 m long and the horizontal beam is 26.0kg and 2.00 m long.Neglect the lateral dimensions of the beams. 1) Find the center of gravity ofthe two joined beams. Express your answer in the form x , y , takingthe origin at the corner where the beams join.

1.00 m 2.00 m

The figure shows emf phasors a, b, and c. Part A For each, what is the instantaneous value of the emf? Enter your answers numerically separated by commas. Ea, Eb, Ec = ______ V Part B At this instant, is the magnitude of emf represented byphasor a increasing, decreasing, or holding constant? A) increasing B)deceasing C)holding constant Part C At

100 V 100 V a 100 V b 100 V

I did an experiment with the motion detector using the lab pro and the logger pro. I want to know "Why does lifting one end of the track lead to constant acceleration?" and "'what determines how much acceleration there is?"

The figure shows a standing wave on a string. a. Draw the standing wave that occurs if the string tension is quadrupled while the frequency is held constant. b. Suppose the tension is doubled while the frequency shaking the string is held constant. Will there be a standing wave? If so how many antinodes will it have? If not, why not?

The figure shows a combination of two identical lenses. (Intro 1 figure) Find the position of the final image of the 2.0-cm-tallobject. = from the object. Try Again; 4 attemptsremaining Find the size of the final image of the 2.0-cm-tall object. = Find the orientation of the final image of the 2.0-cm-tallobject. erect inverted

How far from the bottom of the chute does the ball land? Your answer for the distance the ball travels from the end of the chute should contain R.

Enter a formula for converting a speed given in meters persecond to its value in kilometers per hour, using s as thegiven value. s (km/h) =

Item 3 Part A How does the de Broglie wavelength of an electron change if its momentum increases The de Broglie wavelength of the electron increases. The de Broglie wavelength of the electron decreases. The de Broglie wavelength of the electron is unchanged. Submit Hints My Answers Give Up Review Part Part B How does the de Broglie wavelength of

Part D Consider a problem in which a car of mass M is on a road tilted at an angle 0. The normal force Select the best answer. Mg n Mg cos(0) n Mq cos(0) O is found using F M n Submit Provide Feedback Request Answer Next

Consider the circuit of Fig. 10.41(a). For Rsig 5 KQ, RB RB1 RB2 10 k, 1 kQ, 30 100, and RE 1.5 kn, what is the ratio CECC1 that makes their contributions to the determination of fL equal. ww Vcc Vsig Fig. 10.41(a) Rsig RBI CC1 HF RB2 www www Rc RE www www Cc2 CE www RL V 1

The BJT commonemitter amplifier of Fig. P10.104 includes an emitterdegeneration resistance Re Vcc Fig P. 10.104 R Rc OV,a) Assuming a 1, neglecting ro and assuming the current source to be ideal, derive an expression for the smallsignal voltage gain A(s) VoVsig that applies in the mid band and the lowfrequency band. Hence find the mid band gain

Consider the commonemitter amplifier of Fig. 10.41(a) under the following conditions Rsig 5 KQ2, RB1 33 KQ, RB2 22 KQ, RE 3.9 kn, RC 4.7 k, RL 5.6 KQ, VCC 5 V. The dc emitter current can be shown to be IE 0.3 mA, at which 120. Find the input resistance Rin and the midband gain AM. If CC1 CC2 1 F and CE 20 F, find the three shortcircuit

How far are you from your image when you stand 0.750 m in frontof a vertical plane mirror? A) 1.5 m B) 0.75 m C) 0.38 m D) 3.0 m

What is the equivalent resistance of group (a) of resistors shown in the figure? (Figure 1) R eq = What is the equivalent resistance of group (b) ofresistors shown in the figure? R eq = What is the equivalent resistance of group (c) of resistors shown in the figure? R eq =

(a) 2.0 (2 www 3.0 2 ww 6.00 ww (b) 3.00 3.002 3.002 (c) 2.002 www 1.002 ww 2.00 www

Which of the following is anallowed transition? l =1; m l =0 to l =1; m l =1 l =1; m l =0 to l =1; m l =?1 l =1; m l =0 to l =2; m l =2 l =1; m l =0 to l =2; m l =0 Part B Which of the following is a forbidden transition? l =3; m l =2 to l =2; m l =2 l =3; m l =2 to l =2; m l =0 l =3; m l =2 to l =4; m l =3 l =3; m l =2 to l =2; m l =1

Find the tension in each cord in the figure if the weight of thesuspended object is w. 1) Findthe tension of the cord A in the figure (a). 2) Findthe tension of the cord B in the figure (a). 3) Findthe tension of the cord C in the figure (a). 4) Findthe tension of the cord A in the figure (b). 5) Findthe tension of the cord B in the figure (b). 6)

(a) 30 45 A C W B (b) 60 A 45 B Pa Fi E Pa Fi E

The figure shows a light ray incident on a glass cylinder. What is the angle of the ray after it has entered the cylinder?

R R2

What is the direction of the induced current in (Figure 1) ? a. The direction is clockwise. b. The direction is counterclockwise. c. The direction is to the right. d. The direction is to the left.

Which of the following statements are true concerning specialrelativity? Check all thatapply. Check allthat apply. Clocks moving relative toan observer are measured by that observer to run more slowlycompared to clocks at rest. The laws of physics havethe same form in all inertial reference frames. Light propagates throughempty space with a

What is the coefficient of performance of this freezer? How much energy is needed to freeze this water? How much electrical energy must be supplied to the freezer to freeze the water? How much heat does the freezer expel into the room while freezing the ice? Please show all work behind answers, thank you!

Chapter 16 Problem 16.20 Constants A Carnot freezer that runs on electricity removes heat from the freezer compartment, which is at 10.0C and expels it into the room at 30.0 C. You put an icecube tray containing 390 g of water at 15.0 C into the freezer.

Which color of light, red orblue, travels faster in crown glass?

University Physics Kesten. Tauck Which color of light, red or blue, travels faster in crown glass blue, only if the glass is thin blue red presented by Sapling Learning Slepends on the index of refraction their speeds are the same Map d

Find the average power Pavg created by the force F. Express youranswer in terms of the given quantities and, if necessary,appropriate constants. You may or may not use all of the givenquantities (F, m, ?k, t, s). Let us now consider some questions that include numericdata. A sled is being pulled along a horizontal surface by ahorizontal force F?

Find the amount of energy E dissipated byfriction by the time the block stops. Express your answer in terms of some or all thevariables m , v ,and h and any appropriate constants.

The figure above shows a molecular energy-level diagram. 4 part question (A,B,C,D) Please answers in nm and explain formula thanks!Part A What is the longest wavelength in the molecule?s absorption spectrum?= ? nmPart BWhat is the shortest wavelength in the molecule?s absorption spectrum?= ? nmPart C ( I tried 2486 nm and 1776 nm but was

Energy (eV) 3.01 2.5 0.7 0

The figure shows the E-field in the plane of two point charges. True or False. 1) Q 1 and Q 2 have the same sign. 2) A + charge at c would accelerate to the right. 3) The magnitude of E is the same at a and b. 4) A ? charge at a would accelerate to the left. 5) Q 1 is positive. 6) The size of Q 1 is larger than that of Q 2 . (please explain!

EXAMPLE: A horizontal rope is tied to a 58.0kg box on frictionless ice. What is the tension in the rope if: 1)The box is at rest? Sol: T=0 N 2)The box moves at a steady vx = 6.00m/s ? Sol: T=0 N 3)The box vx= 6.00m/s and ax= 5.60m/s^2 ? Sol: T=325N QUESTION: A horizontal rope is tied to a 49.0kg box on frictionless ice. What is the tension in the

Intuitively, which of the following wouldhappen to Enet if d became very large? A. E net should reduce to the field of a pointcharge of magnitude q. B. E net should reduce to the field of a pointcharge of magnitude 4q. C. The larger d becomes, the smaller themagnitude of E net will be. D. The larger d becomes, the greater themagnitude of E net

add element vector sum X delete elementi attributes d 93 92 point P X reset help 5

Which of the following was NOT an example for a continuousdistribution of charge: Select one: a. A sphere of charge b. A ringof charge c. A long line of charge d. A disk of charge

A charged capacitor with C 710 F is connected in series to an inductor that has L 0.410 H and negligible resistance. At an instant when the current in the inductor is i 2.50 A, the current is increasing at a rate of didt 89.0 As. Part A During the current oscillations, what is the maximum voltage across the capacitor Express your answer to

Constants A fan blade rotates with angular velocity given by w (t)yBt. Calculate the angular acceleration as a function of time. Express your answer in terms of the variables 8, 7, and t. a(t) Submit Part B Submit Part C If y 5.40 rads and 8 0.765 rads, calculate the instantaneous angular acceleration a, at t 3.20 s. Request Answer Qay

A current carrying wire is wrapped around cardboard tube as shown. In which direction does the magnetic field point inside the tube (A) left (B) right (C) up (D) down (E) out of the screen (F) into the screen

Boxes A and B both remain at rest. Is the static friction force on A larger than, smaller than, or equal to the friction force on B A 20 kg H4, 0.4 fafe 30 N B 10 kg 140.5 fAfB fA

Item 1 Consider five identical light bulbs connected to a battery as shown in each of the identical circuits below in Part A. Part A Rank the brightness of all five bulbs (AE) from brightess to dimmest. Rank the bulbs from brightest to dimmest. To rank items as equivalent, overlap them. brightest The A Bo O COO E Bo dimmest 5 mont boln,Rank the

Consider three electric field patterns. (Some of these patterns are physically impossible.) Assume these electric field patterns are due to static electric charges outside the regions shown. (b) (c) Which electrostatic field patterns are phys ically possible,Consider three electric field patterns. (Some of these patterns are physically

Consider the potential difference between pairs of points in (Figure 1) . Suppose that E = 9.5 V . What is the magnitude of the potential difference V 14? What is the magnitude of the potential difference V 24? What is the magnitude of the potential difference V 34?

5.0 wwww 5.00 10 5.00 10 5.0

Consider the six hypothetical electron states listed in the table. n A 3 B 3 1 1 D 2 1 C30 2 m F 2 0 1 0 0 1 0 E 2 1 0 8 0 1 2 i 1 2 1 2 2 1 1 MIT 2 Part A Which, if any, of these states are not possible Enter the letters of the states that are not possible in alphabetical order. For example, if you think that only states C and D are not

During an evening news broadcast in Helsinki, Finland, meteorologists indicated that the day's lowest temperature was -4.0 C. What is the corresponding value of this temperature on the Fahrenheit scale?

An electron with an initial speed of 380,000 m/s is brought torest by an electric field. 1. Did the electron move into a region of higher potential or lowerpotential? A. Because the electron is a negative charge and it slows downas it travels, it must be moving from a region of lower potentialto a region of higher potential. B. Because the

The diameter of a specific copper wire is 8.084 mm,and has a resistivity of 1.72 10 -8 ??m. Find the resistance of a 0.85 km length of such wireused for power transmission in ?.

Consider a slab of crown glass and a tank full of water. What isthe ratio of thickness of the slab of crown glass, d g ,to the depth of water, d w , that contains the same numberof wavelengths of the monochromatic lighting passing from onesubstance to another?

Compute the x -and y -components of thevectors A ? , B ? , C ? ,and D ? in the figure (Figure1) . art A Enter your answers numerically separated by a comma. A x , A y = m Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining; no pointsdeducted Your answer does not have the correct number of comma-separatedterms. Part B Enter your

(10.0 m) 25.0 (12.0 m) 53.0 B (15.0 m) 30.0 A (8.00 m)

Erica (39kg ;kg ) and Danny (45kg ;kg ) are bouncing on atrampoline. Just as Erica reaches the high point of her bounce,Danny is moving upward past her at 4.8m/s ; m/s . At that instanthe grabs hold of her. What is their speed just after he grabs her?

While driving fast around a sharp right turn, you find yourselfpressing against the car door. What is happening? What is happening? The door is exerting a rightward force on you. Centrifugal force is pushing you into the door. Both of the above. Neither of the above. Which of the following point towards the center of the circle inuniform circular

Find the magnitude of the magnetic field at the center of 71 turn circular coil with radius 11.5cm, when a current of 2.95 A flows in it.

Consider the internal reflection of light at the interfacebetween water and ice. What is the minimum critical angle, in degrees, at which youwill get total reflection at this interface? c =_______ Values are for medium: n water = 1.333 ;n ice = 1.309

The diagram represents a contour map of a hilly island. Copy it into your lab notebook. The outer contour of the figure is at sea level. All points on any one particular contour line are at the same elevation (vertical distance above sealevel). The distance between any two contour lines in the diagram represents the horizontal distance between

For the circuit in the previous part, with the frequency set at 1 Hz, what happens if the inductance of the inductor is increased The maximum current decreases. The maximum current does not change. The maximum current increases. Submit Request Answer,DC circuits with an inductor are relatively simpleas we saw in the previous part, the inductor

Consider a system consisting of three particles 4 kg, V 7, 5, 12 ms 1 m 5 kg, V 14, 10, 6 ms m3 2 kg, V3 27, 34, 25 ms (a) What is the total momentum of this system m1 P tot ( ( (b) What is the velocity of the center of mass of this system Vcm Ktrans t (c) What is the total kinetic energy of this system Ktot (d) What is the

Consider the circuit in the diagram, with sources of the emf listed

(20) Problem 4 Consider the circuit in the diagram, with sources of emf listed below. Randomized Variables 25 V 2 49 V 9.5 V 4 43 V 33 Part (a) Find I in amps. A 33 Part (b) Find I2 in amps. 33 Part (c) Find 13 in amps. 13 0.0681 R 5.0 R 78 02 ik 0.10 2 E. E3 0.50 i 0.052 h P 40 02 20 e Rs TA 20.20 2 g E4 Otheexpert Grade Summ Deductions

Item 10 Consider the juncion of three wires as shown in the diagram. (Figure 1) Figure 1 of 1 Wire 1 Wire 3 Wire 2 The magnitudes of the current density and the diameters for wires 1 and 2 are given in the table. The current directions are indicated by the arrows. Wire 1 2 Part A I3 Find the current I3 in wire 3. Express your answer in amperes to

For a charged particle, a constant magnetic field can be used to change only the direction of the particles velocity. only the magnitude of the particles velocity. both the magnitude and direction of the particles velocity. None of the above. Submit My Answers Give Up

The Charge Inside a Conductor (Figure 1) A spherical cavity is hollowed out of the interior of a neutral conducting sphere. At the center of the cavity is a point charge, of positive charge q. Figure 1 of 1 9 Part A What is the total surface charge 9int on the interior surface of the conductor (i.e., on the wall of the cavity) Hints Fint 9 Submit

34. If a compass is placed above a A. currentcarrying wire, as in Figure B Q24.34, the needle will line up with the field of the wire. Which of C. the views shows the correct orien D. tation of the needle for the noted FIGURE Q24.34 current direction

Find the speed of light in each of the following materials. (a) polystyrene m/s (b) gallium phosphide m/s (c) fused quartz m/s

A flask of water rests on a scale thatreads 100 NN. Then, a small block of unknownmaterial is held completely submerged in the water. The block doesnot touch any part of the flask, and the person holding the blockwill not tell you whether the block is being pulled up (keeping itfrom falling further) or pushed down (keeping it from bobbing backup).

Find the resistivity of gold at room temperature. Use the following information:free electron density of gold = 5.90*10^28 ,Fermi energy of gold = 8.86*10^-19 ,mass of electron = 9.11*10*-31 ,charge of an electron = -1.6*10^-19, andmean free path of electron in gold = 3.45*10-8

Enter the expression asin(x)+15 , where asin(x) isthe inverse sine function

Exercise 16.25 Standing sound waves are produced in a pipe that is1.20 m long. Part A For the fundamental overtone, determine the locations along thepipe (measured from the left end) of the displacement nodes if thepipe is open at both ends? Enter your answers in ascending order separated bycommas. x = 0.600 m Submit My Answers Give Up Correct

The figure is a current-versus-potential-difference graph for a cylinder. Part A What is the cylinder's resistance?

I(A) 2 1 0 0 50 100 V (V)

The highest that George can suck water up a very long straw is 2.0m . (This is a typical value.) What is the lowest pressure that he can maintain in his mouth?(answer in kPa.)

2) Explain you reasoning.

A charged spherical insulating shell has inner radius a and outer radius b. The charge density on the shell is p. 1) What is the magnitude of the Efield at a distance r away from the center of the shell where r a zero p(ba)(3or) none of the above Submit You currently have 0 submissions for this question. Only 10 submission are allowed. You can

2. Consider an insulating sphere that has a total positive charge Q distributed uniformly throughout its volume. The sphere has a radius R. In this problem you will calculate the total electric flux through the surface of a closed sphere that is concentric with the insulating sphere. (Note you should not need to calculate an electric field use

A R V3 B R V C R R,Consider the three circuits shown above. All the resistors and all the batteries are identical. Select true or false for each statement. The current through a resistor is the same in circuits A and B. The power dissipated in circuit A is twice the power dissipated in circuit B. The current through a resistor is the same in

The Electric Field Produced by a Finite Charged Wire (Figure 1) A charged wire of negligible thickness has length 2L units and has a linear charge density A Consider the electric field E at the point P., a distance d above the midpoint of the wire. Figure 1 of 1 21. Part A The field E points along one of the primary axes. Which one 3 Submit

what is the charge of the ball? what is the charge of theball?

Problem 20.65 An electric field E (1.6x105NC, right) causes the 5.0 g ball in the figure to hang at a 20 angle. (Figure 1) Figure 1 of 1 20 9 15 5.0 g

For each of the following, state whether the policy would work according to the current income theory and the permanent income theory and explain why in detail. A permanent increase of $500 in Social Security payments to all recipients. An increase in the duration of state unemployment benefits [from 26 weeks to 52 weeks] plus a special additional

Exercise 1.42: (I ONLY NEED INSTRUCTIONS ON HOW TO DRAW THEGRAPH IN PART F) Part A Given thevector A ? =4.00 i ^+7.00 j ^ ,find the magnitude of the vector. (Answer: 8.06) Part B Given thevector B ? =5.00 i ^?2.00 j ^ ,find the magnitude of the vector. (Answer: 5.39) Part C Write an expression for the vectordifference A ? ? B ? using unitvectors.

Which of the following observations led Bohr to formulate hismodel of the hydrogen atom? Which of the following observations ledBohr to formulate his model of the hydrogen atom? Neutrons form adiffraction pattern when scattered from a nickel crystal. The peakof blackbody radiation moves to shorter wavelengths as temperatureincreases. A low-density

Which of the following statements are true for magnetic fieldlines? Check all that apply. A.) Magnetic field lines are close together inregions of space where the magnitude of the magnetic field is weak,and they are farther apart in regions where it is strong. B.) Unlike electric field lines, magnetic fieldlines are continuous. C.) Magnetic field

Find the dimensions [ V ] of volume. Express your answer as powers of length ( l ), mass( m ), and time ( t ). Find the dimensions [ v ] of speed. Express your answer as powers of length ( l ), mass( m ), and time ( t ).

The figure(Figure 1) shows three charges at the corners of asquare. A) Write the electric field at point P in component form.Assume that -axis is horisontal and points to the right, and -axispoints upward. B) A particle with positive charge and mass is placed at point Pand released. What is the initial magnitude of itsacceleration?

Q L 40 L P Q

Establish the performance appraisal for the sale executive at P&G. What errors might managers make when PREPARING the performance appraisal on this job holder? How might managers avoid those errors?

Which of the following quantities are conserved during radioactive decay? (can be more than one answer) A. electric charge B. nucleon number C. angu lar momentum D. linear momentum E. energy F. mass

Why are metals good conductors of electric current? Choose one of the following Do they possess high concentrations of protons Do they possess low concentrations of protons Do they possess high concentrations of free electrons Do they possess low concentrations of free electrons

Fleas have remarkable jumping ability. A 0.45 mg flea, jumpingstraight up, would reach a height of 30 cm if there were no airresistance. In reality, air resistance limits the height to 20 cm. Part A What is the flea's kinetic energy as it leaves theground? Part B At its highest point, what fraction of the initialkinetic energy has been converted

For a fixed height h2 if you plot v2kin versus d, what kind of curve would you get 1.a parabola 2.a horizontal line parallel to the xaxis 3.a straight line with a negative slope of sqrt (g2h2) 4.there is not sufficient information to answer this question 5.a straight line with a positive slope of sqrt (g2h2)

The figure below shows two blocks suspended by a cord over a pulley. The mass of block B is twice the mass of block A, while the mass of the pulley is equal to the mass of block A. The blocks are let free to move and the cord moves on the pulley without slipping or stretching. There is no friction in the pulley axle, and the cord's weight can be

Left cord m A m Right cord 2m B

Which of the following statements are true concerning Planck's quantum hypothesis? Check all that apply. Check all that apply. An upper limit is set on the amount of energy that can be absorbed or emitted in oscillations. A lower limit is set on the amount of energy that can be absorbed or emitted in oscillations. The energy of the oscillations of

The figure shows the circular wave fronts emitted by twosources. ( Figure 1 ) Part A) Give the distances from points P, Q and R to the point 1 inindicated order as multiples of ? . Part B) Give the distances from points P, Q and R to thepoint 2 in indicated order as multiples of ? . Part C) Give the propagation difference at points P, Q andR in

P 2 R

Which of the following statements about work isor are true? (More than one statement may be true.) A. Negative net work done onan object always reduces the object's kinetic energy. B. If the work done on an object by aforce is zero, then either the force or the displacement must havezero magnitude. C. If a force acts downward, it doesnegative

Which of the following will increase the resistance of awire? Check all that apply. Check all that apply. Decreasing the resistivity of the material the wire is composedof will increase the resistance of the wire. Decreasing the cross-sectional area of the wire will increasethe resistance of the wire. Decreasing the length of the wire will

In (Figure 1) the camera lens has a 54 mm focal length. How high is the man's well-focused image on the CCDdetector? Express your answer to two significant figures and include theappropriate units.

Which of the following statements are true concerning signconventions for image formation? Check all that apply. A virtual image has a positive image distance; a real image hasa negative image distance. For an upright image, the magnification is positive; for aninverted image, the magnification is negative. When the center of curvature of a

What does the following element description actually mean? hydrogen-2 Question 11 options: two hydrogen atoms a molecule of hydrogen gas a hydrogen with one neutron and one proton a hydrogen with two protons a hydrogen with two neutrons

2. Consider a solid sphere and a solid disk with the same radius and the same mass. Explain why the solid disk has a greater moment of inertia than the solid sphere, even though it has the same overall mass and radius. 3. Calculate the moment of inertia and the rotational kinetic energy for the following objects spinning about a central axis (in

When you lift an object by moving only your forearm, the mainlifting muscle in your arm is the biceps. Suppose the mass of aforearm is 1.20 kg . If the biceps is connected to theforearm a distance dbiceps= 3.50 cm from the elbow,how much force Fbicepsmust the biceps exert to hold a800 g ball at the end of the forearm atdistance dball = 37.0 cm

Which of the following are real motions of our "spaceshipEarth"? Select all that apply. 1:Earth moves with the Sun on an orbit around the centerof the Milky Way galaxy. 2:Earth and our solar system moves with the Milky Waygalaxy relative to other galaxies in our Local Group. 3:Earth and the Local Group move along with the LocalSupercluster on an

A near-sighted person has prescriptionglasses. The purpose is to bring the objects virtualimage ? 1. to the far point of the eye. 2. to the near point of the eye. 3. None of the these. 4. to the retina of the eye.

In nature, substances often possess a crystalline structure. The basic component of a crystal is the unit cell, such as the rectangular parallelpiped illustrated in In the questions that follow, express your answers in terms of the unit vectors i, j, and k, that is, a vector with components V, Vy, and V, in the x, y, and z directions,

What is the nature of the force between balls A and D? attractive repulsive neither attractive nor repulsive

A converging lens is used to project the image of an arrow onto a screen as shown. Object Lens ScreenImage 1) We can tell that The object is located inside the focal length of the lens The image formed is real and inverted The image formed is virtual and upright Submit You currently have 0 submissions for this question. Only 2 submission are

Is energy transferred from the environment to the system or from the system to the environment according to the following bar chart K is kinetic energy, U is potential energy, Wext is external work, Eth thermal energy. Energy (J) 4 017 2 1 TT 1 2 K U W K U AE ext Energy is transferred from the system to the environment. Energy is transferred