Physics Questions and Answers November 16, 2022

Two identical 1000kg cars skid off the highway car A hits a side rail and slows from 30 ms to a complete stop in 0.1 seconds, while car B hits a protective shock absorber and slows from 30 ms to a complete stop in 0.6 seconds. The following questions refer to the time during which the cars slow down from 30 ms to 0 ms. During this time A. which

Cross out the objects below that this rules out from having magnetic fields. Mercury Venus Earth Planet Since the free charges in the molten material must be in motion to generate a magnetic field, only planets with faster rotation rates are likely to have magnetic fields. Refer to Table 7.3, and cross out any planets above that do not have fast

2) The following velocity - time graph that represents the velocity of a bird on a straight line for 10 seconds. The bird began at a position of +5 m (2) The following velocity - time graph that represents the velocity of a bird on a straight line for 10 seconds. The bird began at a position of +5 m (11 x 1 mark = 11 marks) Velocity (m/s) Time (s)

The amplitude of a system in simple periodic motion is doubled. Determine the change in: a) Total energy. b) The maximum speed. c) The maximum acceleration. d) The period.

The current increases asymptotically in an RL circuit when connected to a voltage at t 0 because of the induced emf in the inductor coil acting as an impedance (albeit temporarily). True False

The position x, in meters, of an object is given by the equation v At Bt, where t represents time in seconds. 3 4 What are the SI units of B a. ms 2 b. ms 3 c. ms d. m

If an RL circuit consisted of a variable resistor, the time constant would increase if the resistance got smaller. True False

Water has volume flow rate 200 Lmin that carried through a pipe with an inside diameter of 2 cm, what is the water velocity. b) Pipe dimension D 0.5m, D20.2, and D3 0.1m. Fluid velocity V 3ms, v2 6ms What is fluid velocity v3 V2 VI D D2 D3 V3.

Derive an expression for the back emf of the universal motor and compare this expression with the back emf expression of the DC series motor.

The back electromotive force (EMF) in a universal motor, denoted as Eb, can be expressed as E VI R La (R Rf)

A tank of coefficient of volume expansion 6.0 x105C filled with 2.0 m3 of a liquid of coefficient of volume 18 x 105C is at a temperature of 40 degrees C and is in thermal equilibrium. The tank and liquid is cooled to 20 degrees C. How much more liquid can be added to the tank 6. In an immersion measurement of a womans density, she is found to

A proton enters a uniform magnetic field at a 90degree angle Considering the protons motion in the magnetic field, the magnetic force serves as the OA gravitational force OB. frictional force C. centripetal force OD. tension QUESTION 15 In the previous question, the protons speed is 621 x 10 ms, and the uniform magnetic field has a strength of 0

Find the effective mass m, for the band EABK B(AK,BK, CK) and find an expression for the force given the components a,,a,,a,

Show that the minimum distance between an object and its image, formed by a thin lens, is 4f. In what situation does this minimum occur? b) A thin diverging lens and a concave mirror have equal focal lengths, an object is placed at a distance 3f/2 to the left of the lens, while the mirror is at a distance 3f on the other side of the lens. Describe

A = (58000, 1390) B = (62000, 1490) C = (62750, 1500) D = (63500, 1510) E = (67300, 1602) F = (67350, 1605) G = (77300, 1860)

Pictured below are the orbital paremeters for several moons orbitting the same planet. Each moon orbits in a nearly perfect circle. Find the mass of the planet. Note Gm means gigameters, which is millions of kilometers. The Moon is about 0.384 Gm from the Earth. (Yes, the errorbars are pretty small.) Orbital Radius Cubed (Gm) 1800 1700 1600 1500

skaters often make jumps that involve them spinning around the long (vertical) axis of their bodies. They start by gliding at a fairly high speed, then they dig one toe of their skate (which has spikes to help with jumps) into the ice and use that to both jump and spin. How many complete revolutions can a typical figure skater make For your

See the figure below in the plane of the paper, a particle of charge q 0.48C moves through a region where the magnetic field is uniform. The velocity of the particle forms a 30degree angle with the magnetic field. The direction of the magnetic force exerted on the particio is O Aup OB down Cinto the page OD out of the page,See the figure below in

In the figure below, a 30.0 cm x 600 cm rectangular circuit containing a 12.70 resistor is perpendicular to a uniform magnetic field that starts out at 0.69 T and steadily increases to 238 Tin 7.3 seconds. While this field is changing, what does the ammeter read (in mA) Normal format with 3 SF 60.0 cm D 36.0 cm

You are 6 m from the wall of a house. You want to toss a ball to your friend who is 6 m from the opposite wall. The throw and catch each occur 1 m above the ground. (a) What minimum velocity, expressed ini, j notation, will allow the ball to clear the roof V (b) At what angle and speed do you throw the ball 0 Vol 6.0 m Vo 6 6.0m 60m6.0m 2 10m,g 10

Calculate the magnitude of the linear momentum po of a 63.9 kg object on the Equator, as measured from the center of Earth. The radius R of Earth is 6371 km. Define the time at which the previous result was calculated as to. What is the magnitude of the net change Ap, in the objects momentum in the 6 h following to Now, calculate the magnitude of

In this figure R14 2. The current in the 10V emf is R 10 V 5.002 5.002 15 V A. Use the absolute value, normal format, 2 SFS

Two wires both carry a current I 3.50 A into the page. Wire 1 is located at the origin (0,0) wire 2 is located on the yaxis (0,a) at a distance a 4.00 cm above wire 1. Point P is located on the xaxis as shown. (0,a) (0,0) (a,0) (a) What is the magnitude of the magnetic field B at point P due to wire 1 (the wire at the origin (0,0)) 0.506 .

Two highcurrent transmission lines carry currents of 35 A and 67 A in the same direction and are suspended parallel to each other 30 cm apart. If the vertical posts supporting these wires divide the lines into straight 16 m segments, what magnetic force does each segment exert on the other N Exponential format with 2 SF

A ball is launched upward from the ground. Its location at 1second intervals is shown. A set of velocity and acceleration vectors is shown for location C. Location B a Tap to identify the v and a vectors for ... Location D Option 1 of 8 Tap Me to Toggle Location C Through Answer Options. a Location I Tap Me to Toggle Through Answer Options. DO F

An object is located at a distance S 2f to the left of a converging lens, as shown. Using the lens equation and the magnification equation, characterize the image of the object. The image is inverted and is smaller than the object. The image is inverted and is bigger than the object. The image is inverted and is the same size as the object.

Three small spherical masses are located in a plane at the positions shown below. (w) A A Tries 040 3 2 1 201 54321 0 1 2 3 4 5 X (m) The masses are Q0.300 kg, R0.200 kg, and Sm0.400 kg. Calculate the moment of inertia (of the 3 masses) with respect to an exis perpendicular to the xy plane and passing through x 0 and y3. (Since the masses are of

22. A 12V car battery has an internal resistance of 0.4 2. (a) What is the current if the battery is shorted momentarily (b) What is the terminal voltage when the battery delivers 25 A Section 204 Combinations of Resistors 23) (a) Find the equivalent resistance between points a and b in Figure 2042. (b) If the potential drop between a and bis 12

Resultant force on a charge is the vector sum of the individual forces on that charge Consider three point charges at the cornerers of a triangle, as shown below, where q 6.0 C, q2 2.0 C and q3 8.0 C. 1 Find the magnitude and the direction of the resultant force on qi 2 Find the magnitude of the resultant force on q2 qul BV q1 6.0 30cm 9.0 53 93

normal format (NOT exponential format) with 3 SF d C2 The equivalent capacitance of the combination is uF Express your answer in QUESTION 7 Following the previous question, if C1 is changed to 5 44 F C2 is changed to 100F. the applied voltage V 10.0 V, then the voltage across Ct is V. Use normal format with 3 SE,In this figure, C1102 F. C2 42 F.C3

The mass m 5.0 kg resting on a frictionless horizontal table is connected to a horizontal spring with stiffness constant k 150 Nm. The mass is pulled a distance to the right so that the spring is stretched a distance co 1.6 m initially, and then the mass is released from rest., Part G At what position it occurs Express your answer using two

True or False?

The position vector of a particle moving in a certain force field is given by r(t) actibeat, where a, b, a are positive constants and a b. The potential energy has a maximum at the origin.

1 2 Trials Time (s) 3 Using the following materials stopwatch, tennis ball (any ball), and long string, meter stick or tape measure or ruler, follow the following steps Average a. On the second floor of your building. Drop the tennis ball b. Using the stop watch, ask your classmates to record the time it takes the ball to reach the ground Record

A hoop rolls down a 5.75 m high hill without slipping. Randomized Variables What is the final speed of the hoop, in meters per second Numeric A numeric value is expected and not an expression.

A water wheel with radius R1.9 m and mass M1.55 x 10 kg is used to power a grain mill next to a river. Treat the water wheel as a hollow cylinder. The rushing water of the river rotates the wheel with a constant frequency f2.3 Hz. Randomized Variables R.,1.9 m M1.55 x 10 kg 2.3 Hz Part (a) Calculate the angular velocity of the water wheel in

Show all units and working. The speed of light in acertain substance is88.7%of its value in water. What is the index of refraction of thatsubstance? Write your answer up to two decimal point1 answer

The quantities obtained for the x variable in an observation study are given in the table. a) Suggest a suitable model for this data and explain the reason for your suggestion in at most 2 (two) sentences. b) In order to estimate the parameters (unknowns) in the model you propose, explain in maximum 3 (three) sentences how you chose your solution

X 0 1 2 3 Gozlem 1 3.5 11 23.5

Discuss the periodicity of Bloch function in real space and Bloch function and eigen-energy in the reciprocal space in energy band theory.

A plank of weight 70N and length 5m rests on supports at points C and D. The distance from A to C= 0.4m. The reaction on the rod at C is 9N. Calculate the reaction force at point D, calculate the distance from C to D

We have a coin lying on a record player. The record player has a coefficient of static friction. At a certain angular velocity of the record player the coin slides out of the record player. Find initial angular velocity (omega o),in terms of kinetic friction (mu k),R and g.

The engine in an imaginary sports car can provide constant power to the wheels over a range of speeds from0to120kilometers per hour(km/hkm/h).At full power, the car can accelerate from zero to60.0km/hkm/h in time1.50ss.At full power, how long would it take for the car to accelerate from0to90.0 km/h ?Neglect friction and air resistance. Express

If the magnetic field in a traveling EM wave has a peak magnitude of 8,872 pT, what is the peak magnitude of the electric field (in Vm)

when a scooter leaning against the wall with one handle, 1, Draw FBD, you can define some parameters of the scooter to sovle equilibrium equation 2, Determine what forces and moments occur at middle of handlebar joins 3. Calculate All Forces & Moments (Reactions ) (Don't neglect the weight of anything) Wheel radius: 14 cm Handle to handle Length :

) You are in a room where the wall is not straight, but makes an angle a with the horizontal as in the figure. We throw a ball with angle from the horizontal and initial speed Po. at a distance d from the base of the wall. Take the initial position of the ball to be the origin. a) Write the x and y positions of the ball as functions of time (L b)

Entropy change in an ideal gas Find the entropy change of an n mole of an ideal gas in a reversible process from a state A (PA, VA, TA) to a state B (PB,VB,TB). Specific heats cy and cp are given. 2. Response functions Show that kr(Cp Cy) TV and Cp(kr ks) TV Here the compressibility is given by Kx (1V)(avp)x and the coefficient of thermal

Write the A vector with its unit vectors i and j component. B)Find the vector C2A3B,A40 and B20,30 100 B 53

many types of mattresses exist, from inner-springs to memory foam and non-elastic material. While traditional mattress a built with a set of internal springs, the desgins have continually changed. one more recent form of the innner spring system is to have many parallel spring sets, each able to compress indicvidually if pressure is applied to it.

36 v29,866ms ac 0.00 Siss,The radius of Earths orbit around the sun is 1.5 x 108 km. The Earth completes its orbit in 365.25 days. a) What is the magnitude of the orbital velocity of the Earth in ms b) What is the radial acceleration of the Earth toward the sun

An artificial earth satellite has a circular orbit of radius 6.64 106 m (which means it is orbiting approximately 280 km above the surface of the earth) in an equatorial plane. The period T (the time required for one complete orbit) is 5.44 10 s (about 1.51 h). (a) Compute the (constant) speed of the satellite.,(b) If the satellite is directly

Using the First Law of Thermodynamics calculate the heat absorbed by an ideal gas (with the equation of state pV nRT and with cy const) going through a process from an equilibrium state 1 characterized by the pressure p and volume V to the equilibrium state 2, characterized by p2 and V, where V V and p2 P1. The gas was first heated

3 T 73.7N 6 fs 141.8N up incline,3 T 73.7N 6 fs 141.8N up incline,You are lowering two boxes, one with a mass of 31 kg on top of the other with a mass of 79 kg, down a ramp. You pull a rope on a surface, pulling parallel to the surface to make it move. Both boxes move together at a constant speed of 16.0 cms. The coefficient of kinetic

determine the focal length of a concave lens

5 10 10 interactives 15 20 25 30 Q,5 10 10 interactives 15 20 25 30 Q

A small steel wire of diameter 1.5 mm is connected to an oscillator and is under a tension of 6.3 N The frequency of the oscillator is 65.0 Hz and it is observed that the amplitude of the wave on the steel wire is 0.52 cm. What is the power output of the oscillator, assuming that the wave is not reflected back Express your answer using two

A block of solid lead sits on a flat, level floor. Lead has a density of 1.13 x 104 kgm. The mass of the block is 20.0 kg. (a) What is the volume of the block (in m) What is the definition of density Can you use it to solve for volume m (b) The amount of surface area of the block in contact with the floor is 2.13 x 102 m. What is the average

. Find the escape speed from Jupiter. The students should identify what information they need. Note that all the needed data are readily available. The students are supposed to identify what information they need and to find it.,. Find the escape speed from Jupiter. The students should identify what information they need. Note that all the needed

What is the average charge weight for .223 Remington with 55 Grain projectile?

,,Circle the three light sources in the picture. Order the light sources from brightest to dimmest by adding the numbers 1, 2 or 3 to the picture. The brightest light source is 1. The dimmest is 3. Describe three ways in which the people in the picture are using light. Drow rays on the picture to show how the light from the table lamp is

Two waves of light in air, of wavelength 600.0 nm, are initially in phase. They then travel through plastic layers as shown in the figure below, with L14.10pm, L3.63 jum, n11.40, and n21.58. What multiple of A gives their phase difference after they have both emerged from the layers Give absolute value. Number I Units M,Two waves of light in air,

How do you think the magnitude of the electrostatic force between two objects will change if the charge of each object was doubled?

Consider the two currentcarrying wires in the figure. On the left is a long, straight wire carrying current I. In the same plane, there is a rectangular loop, which carries a current I. The dimensions of the rectangular loop are shown in the figure, and the left side of the loop is a distance c from the wire. What are the magnitude and direction

A particle is moving in three dimensions and its position vector is given by r(t) (4, 4t 2, 3t)i (4, 5t 2, 3)2 (3, 3t 3, 1t)k where r is in meters and t is in seconds. Determine the magnitude of the average acceleration between t1s and t 3s. Express your answer in units of ms2 using one decimal place.

The electric potential at x 3.0 m is 120 V, and the electric potential at x 5.0 m is 190 V. What is the electric field in this region, assuming its constant

A gas is described by the fundamental relation AS3 nV where A const. U Find the equation of state p(T, V, n). Answer p nT3 V 27 AV 2. A gas fulfills the van der Waals equation of state RT p(T, v) V b where a, b, and R are positive constants, and v V n. Demonstrate that the specific heat cy of this gas does not depend on volume V.,3. Evaluate

A mass of 4 kg lies at the bottom of a smooth inclined plane 6 m long and 2 m high. It is attached by a light cord 6 m long, which lies along the line of greatest slope of the plane, to a mass of 2 kg, which hangs just over the top of the plane. The system is allowed to move. Assuming that the hanging mass comes to rest when it reaches the ground,

The figure below shows a rectangular coil of length and width w consisting of N turns of conducting wire, moving to the right with a constant velocity v. The coll moves into a region of uniform magnetic field B, pointing into the page and perpendicular to the plane of the coil. The total resistance of the coll is R. Find the magnitude and

A turntable rotates at 33 revmin. Calculate the angular velocity of the turntable. A particle on the turntable is located 0.11 m from the center of the rotating turntable. What is the speed of the particle

A bicycle with 56.20 cm diameter wheels is traveling at 19.20 kmhr. At what angular speed do the wheels turn How long do they take to turn once around

The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.33 rads. It accelerates for 27.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 59.5 s after it begins rotating.

The size of an induced potential difference in a solenoid depends on these factors A. Strength and rate of change of the magnetic field B. Number of coil windings and strength of the magnetic field C. Number of coil windings and rate of change of the magnetic field D. Number of coil windings and diameter of the solenoid

Given value R, r, Omegaconst. Find the velocity and acceleration of point A.

Charge density p ar,Total charge Q is nonuniformly distributed over a solid sphere of radius R, such that the charge sity is given by p ar. Find the constant a and determine its unit.

Compare and contrast the structure of the Lagrangians and discuss the resulting pnenomenology for the Electromagnetic, Weak and Strong interactions under the following headings gauge symmetry bosons boson masses fermionboson interactions bosonboson interactions interaction strength and energy dependence. 7 marks,Compare and contrast the structure

Draw the diagram in your AP Physics 1 notebook. Sketch one vector at each location indicating the direction of the net force acting on the bob at points A, B, and C. If the net force is zero at any location, write none at that location on your diagram. ii) Provide a short explanation for how you determined the net force at each location. Include

Consider the roller coaster ride shown below. Here r 9m and r2 17m. Imagine that the car is traveling with a constant speed of u 6.4ms throughout the whole ride. If the mass of a child riding the car is m 26kg, determine the apparent weight of the child at point A. Express your answer using Sl units with zero decimal place. Take g 9.80ms. 10 12

Using a mathematical solution, determine the reactions at A and B if the lamp has a mass of 20 kg. Answers RA 390 N 25 RB 500 N 45 700 mm Lamp 800 mm 45 Bo,Using a mathematical solution, determine the reactions at A and B if the lamp has a mass of 20 kg. Answers RA 390 N 25 RB 500 N 45 700 mm Lamp 800 mm 45 Bo

A small weight hangs from a string attached to the rearview mirror of a car accelerating at the rate of 1.03 m/s 2 . What angle does the string make with the vertical?

Describe explicitly how you generated your velocity measurement in your procedure. in your discussion mention if there be any downsides to determining the velocity this way in regards to calculating the momentum and consequently the impulse.

Least squares fit using Ohms law The file current measurements.txt, contains a set of six measurements of the current as a function of the voltage to measure the resistance, R. The first column is the voltage value in V and the second column is the current value in A. The uncertainty for each measurement is 0.2A. (a) Plot the current measurements

The accompanying figure shows a crosssection of a long, hollow, cylindrical conductor of inner radius T 3 cm and outer radius 7 6.5 cm. A 38A current distributed uniformly over the crosssection flows into the page. Calculate the magnetic field at r 0.5 cm, r 4 cm, and r 7.5 cm. Hints 1 12 a. Magnetic field at r 0.5 cm is 8.994E6 b. Magnetic

In order to study the longterm effects of weightlessness, astronauts in space must be weighed (or at least massed). One way in which this is done is to seat them in a chair of known mass attached to a spring of known force constant and measure the period of the oscillations of this system. The 36.0kg chair alone oscillates with a period of 1.20 s,

A particle of mass m is placed in a simple harmonic oscillator (SHO) potential. a) Write down a statevector ) which maximizes the expectation value in position, (x), and is constructed as a linear combination of the ground state energy eigenvector for the SHO (0)) and the first excited state energy eigenvector for the SHO (1)) b) Assume the

The simplified equation for heat conduction across a plate is AT kI AQ At where Q is the quantity of heat (J), t is time (seconds), A is area of the plate (m), T is temperature (properly Kelvins but can use Celsius here), kr is the thermal conductivity of the material (W(mK)), and Lis thickness of the plate (m). Use this information to solve the

Problem 04 A particle of mass m is in an infinite potential well of width a defined as V(x) 151 otherwise At time t 0 the particles wavefunction can is known to be (x,t 0) a(z) 2(x) where (2) describes the ground state wavefunction and 2(2) describes the first excited state wavefunction. a) Calculate the expectation value of position at time

An accelerated electron An electron is initially at rest. At time t 0 it is accelerated upward with an acceleration of a 1 x 108 ms for a very short time (this large acceleration is possible because the electron has a very small mass). We make observations at location A, x 15 meters from the electron (see the figure). Electron (a) At time t 9

e An undamped driven oscillator of mass m and natural frequency of oscillation wo is subjected to an external force F(t) F,coswt, where F, and (wo) are constants. The oscillator satisfies the following equation of motion mx mwx F(t) Write down the general solution x (t) to the corresponding homogeneous differential equation. (ii) Find the

The mass, m 3.0 kg slides on a frictionless surface inclined at an angle, a with the horizontal as shown in Figure Q3(a). If P 50N, the mass, m22.0 kg has an upward acceleration of 2.5 ms. Estimate the angle, a if the pulley has negligible mass and friction. 4 222 Thi Figure Q3(a) (5 marks),The mass, m 3.0 kg slides on a frictionless surface

Figure R oooo 1 of 1 4,An LRC orolt has an inductance of 6 470 Ha capacitance of 285105P, and a resistance of R as shown in Part A What is the angular hequency of the circut when R07 Express your answer in radians per second View Available Hints) VALS Subm Part What we must have to give a decrease in anger ency of 140 compared to the rate cated in

In Fig. 3322a, a beam of monochromatic light re flects and refracts at point A on the interface between material 1 with index of refraction n 1.33 and mater ial 2 with index of refraction n 1.77. The incident beam makes an angle of 50 with the interface. What is the angle of reflection at point A What is the angle of refraction there,50 010 A

600 g of water at 0C is in a ice-box and located in a freeser. The freeser can remove heat from this water at the rate of 20 cal/sec. How long time does it take until all the water becomes frozen ice?

Find the Max stress on the rivet when 11m m.C Cu L 17 Mmm Est 200 GPa, 1 50 Eca105GPa, AT50c, and Drivet20mm. Copper Steel D25mm Fig.2

A 8.4 kg mass moves along a frictionless track in a circular loop on the mass when it reaches the bottom of the loop Check f radius 6.0 m. At the top of the loop, the mass is inverted and barely completes the loop. What normal force acts

A cars velocity changes from 0m/s to 30 m/s in 10 seconds. Calculate the acceleration

Three moles of a neen gas are at a temperature of 455 K. Calculate the average kinetic energy per atom, the rootmeansquare (ms) speed of atoms in the gas, and the internal energy of the gas. HINT (a) the average kinetic energy per atom (in 3) (b) the rootmeansquare (rms) speed (in ms) of atoms in the gas x ms (c) the internal energy of the gas (in

A satellite orbits the earth with a speed of 7.3 x 10 ms. What is the distance from the centre of the earth to this satellite A. 2.3 10 m B. 3.8x10 m C. 7.5100 m D. 1.3x107 m

Two children (m 31.0 kg each) stand opposite each other on the edge of a merrygoround. The merrygoround, which has a mass of 1.72 x 102 kg and a radius of 1.2 m, is spinning at a constant rate of 0.48 revs. Treat the two children and the merrygoround as a system. (a) Calculate the angular momentum of the system, treating each child as a particle.

The equivalent capacitance of the combination is HF Express your answer in,normal format (NOT exponential format) with 3 SF C1 C2 HHH C3,In this figure, C1 102 F. C242 F. C354 F,Following the previous question, C1 is changed to 5 44 F. C2 is changed to 10.0 uF, the applied voltage V10.0 V, then the voltage across C1 is V Use normal format with 3

A space capsule orbits Earth at an altitude of 1. Draw a force diagram of the space capsule. 2. Write a set of equations describing your force diagram. Use only the forces identified on your diagram. dont include mumber 3. Calculate the orbital radius of the capsule 4. Calculate the orbital velocity of the capsule. 5. Now suppose the enpaule is to

An object is located a distance S I to the left of a diverging lens, as shown. Determine the image size using the lens equation and the magnification equation. The image is the same size as the object. The image is half as big as the object. The image is twice as big as the object. 4 11 SS f object S f M S S