Physics Questions and Answers August 30, 2022

Explain Approaches to generate system oriented names.

What is Object-locating mechanism? Explain types of object-locating mechanisms

Explain Issues in designing human oriented names.

Explain Characteristics of Name Service Activities.

Explain Issues in name cache design

Write a note on Naming and security in Distributed System.

Write a note on Domain Name Service (DNS).

1. How much energy must be removed froma 200 g block of ice to cool it from 0degrees C to -20 degrees C? The specificheat of ice is 2090 (J / kg?k) Express your answer to two significant figures and include theappropriate units.

Draw and explain Architecture of Traditional Web Based system.

Write a note on Security in Distributed System. Explain Goal of Security.

ELECTRIC FIELD AND FLUX 1. A piece of paper is folded into three equal parts as shown. a. How many area vectors are needed to describe the surface of the paper Sketch the area vectors on the side view diagram and label them A, A, etc. Name Perspective view b. Consider an imaginary surface in a uniform electric field E as shown. The surface has the

1. What can one say about the image produced by a thin lens thatproduces a positive magnification? a. It is real and inverted b. It is real and erect. c.It is virtual and inverted. d. It is virtual and erect. 2. Ifthe diameter of a lens is reduced, what happens to themagnification produced by the lens? a. It increases b. It decreases c. It is

Magnetic field = 5.66 x 10^ -6

10. 1.5 pts (Section E) Use your measured values from part E to calculate the strength of the Earths magnetic field, disregarding any uncertainties for now (well calculate uncertainties in the next question).

2. Two crates, A and B, are in an elevator as shown. The mass of crate A is greater than the mass of crate B. a. The elevator moves downward at constant speed. i. How does the acceleration of crate A compare to that of crate B Explain. ii. In the spaces provided below, draw and label separate freebody diagrams for the crates. Freebody diagram for

1. An underwater diver sees the sun 53 above horizontal. How high is the sun above the horizon to a fisherman in a boatabove the diver? 2. A ray of light traveling through air encounters a 2.0 cm-thick sheet of glass at a 45 ? angle of incidence. Assume n = 1.5. How far does the light ray travel inside the glass beforeemerging on the far side? 3.

14) The figure shows four Gaussian surfaces surrounding a distribtuion of charges. FO d 2q FO b (a) Which Gaussian surfaces have an electric flux of qEo through them (b) Which Gaussian surfaces have no electric flux through them

12. 13. 12 points SerPSE9 40.P.040. (a) An electron has kinetic energy 2.00 ev. Find its wavelength. m (b) A photon has energy 2.00 eV. Find its wavelength. m Need Help Read It 1 points SerPSE9 40.P.042. Calculate the de Broglie wavelength for a proton moving with a speed of 8.0 x 105 ms. m Need Help Read It

(13) Problem 7 Consider the Lyman series for atomic transitions in hydrogen. A 50 Part (a) Calculate the wavelength the first line in the Lyman series, in nanometers. A 50 Part (b) What type of electromagnetic radiation is it

Given the following information for a company 250 Market value per share Current dividend per share 5 Dividend growth rate 4 Required rate of return 6 What is the estimation of the companys intrinsic value per share

3. (2) Suppose you have a uniform Electric field with magnitude of 5 Vm in the x direction. What can you say about potential difference between two points separated by a distance of 2 m along the xaxis What can you say about potential difference between two points separated by a distance of 3 m along the yaxis Is your answer to this question

19) A typical compact disk has a mass of 15 grams and a diameter of 120 mm. What is its moment of inertia about an axis through its center, perpendicular to the disk (5 points) 20) Youre carrying a 3.6mlong, 25 kg pole to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of

2. Due to the drivers not paying attention, a small car and a big truck collide both are initially moving at 35 mph towards each other. Compare the magnitude of the force the truck exerts on the car to the magnitude of the force the car exerts on the truck. Which force is greater Which vehicle would you rather ride in Describe why you made your

(13) Problem 8 Suppose the firstorder maximum for 460 nm blue light being transmitted through a diffraction grating is at an angle of 21. Randomized Variables 460 nm 0 21 How many lines per centimeter are there on this diffraction grating n 1851 sin() cos() 6 cotan asin() atan() acotan() tan() () 7 89 acos( EM 4 5 sinh() 1 2 3 cosh() tanh()

What plots do I point on the graph?

Problem 28.31 A coaxial cable consists of a solid inner conductor of radius R surrounded by a concentric cylindrical tube of inner radius R2 and outer radius R3 (the figure). The conductors carry equal and opposite currents Io distributed uniformly across their cross sections. (Figure 1) Figure 1 of 1 R R3 te Let Io to R 1.50 A, R 1.00 cm, R

A 25 kg child bounces on a pogo stick. The pogo stick has a spring with spring constant 2.0x10^4 N/m. When the child makes a nice big bounce, he finds that at the bottom of the bounce he is accelerating upwards at 9.8 m/s^2. How much is the spring compressed?

10. You are given two metal spheres on portable insulating stands, glass rod, and a piece of silk. Explain how to give the sphere exactly equal but opposite charges.

13. 14. 15. 16. 17. e. C. A 60vibrationpersecond wave travels 30 meters in 1 second. Its frequency is 30 hertz and it travels at 60 ms 60 hertz and it travels at 30 ms 1800 hertz and it travels at 2 ms Not enough information to determine C. d. a. b. e. a. b. C. d. Assuming the velocity is constant, doubling the frequency of a sound wave, you

A 180kmh wind blowing over the flat roof of a house causes the roof to lift off the house. Part A If the house is 6.4 m x 14.0 m in size, estimate the weight of the roof. Assume the roof is not nailed down Express your answer to two significant figures and include the appropriate units. Submit Value Units My Answers Give Up Provide Feedback

28. The best explanation for the titration results represented by the following graph is Hd 14 13 12 10 9 8 7 6 5 4 3 2 1 0 0 Titration Curve for Titration of 37 mL of 0.10 molL H3PO4(aq) with NaOH(aq) 10 20 30 40 50 60 Volume of 0.10 molL NaOH(aq) (mL) 70 The acid can accept more than one proton O The acid can donate more than one proton The base

(17) Problem 5 Suppose that a 0.275 m radius, 500 turn coil produces an average emf of 9950 V when rotated onefourth of a revolution in 4.18 ms, starting from its plane being perpendicular to the magnetic field. What is the peak emf generated by this coil, in volts 80 1.28 G D

(20) Problem 2 An objects speed is increased by a factor of three. 50 Part (a) How does the objects momentum change O There is not enough information. O It decreases by a factor of three. The momentum does not change. O It increases by a factor of more than three. It decreases by a factor of more than three. O It increases by a factor of three.

(14) Problem 5 Consider a conducting rod of length 29 cm moving along a pair of rails, and a magnetic field pointing perpendicular to the plane of the rails. At what speed (in ms) must the sliding rod move to produce an emf of 0.75 V in a 1.4 T field V cac tan 200 cin cat Lacie Latar Laaa cink cool tank cate Degrees Radians T F Suhr Hint Hints 1

14) A machine puts out 100 watts of power for every 1000 watts put into it. The effici of the machine is A) 10. B) 50. C) 90. D) 110. 15) A jack system will increase the potential energy of a heavy load by 1000 J with a v input of 2000 J. The efficiency of the jack system is A) 10. B) 20. C) 50. D) 80. 16) If the Sun were twice as massive A) its

1)For the oscillating object in the figure, what is its maximum speed? Give appropriate units. 2)For the oscillating object in the figure, what is its maximum acceleration? give appropriate units

x (cm) 10.0 O 10.0 5.0 10.0 15.0 t (s)

A 193nm-wavelength UV laser for eye surgery emits a 0.500mJpulse. (a) How many photons does the light pulse contain?

(25) Problem 5 As shown in the figure, there are 3 point charges along the xaxis located at 3, 8, and 11 cm. What is the xcomponent of the force on the charge located at x 8 cm given that q0.95 C in N F sin()) cotan() atan() cosh() cos() asin() acotan() tanh() ODegrees Submit Hints 0 deduction per hint. Hints remaining 3 tan() acos() sinh()

1. Suppose that C = 40+0.9Yd; I = 50; G =10; X= 50; M= 10+0.1Y; T =10; R=0 and Yd= Y-T+R - National income - Compare the investment multipliers and tax multipliers of closed and open economy. 2. We have marginal propensities of import and marginal propensities of saving in Laos as 0.2 and 0.5 and in America as 0.3 and 0.2, respectively. - Please

A 20-kg loudspeaker is suspended 2.0 m below the ceiling by two ropes that are each 30? from vertical. Find the value of T , the magnitude of the tension in either of the ropes. Express your answer in newtons. T= Suppose that the loudspeaker in the problem had a mass of 500 kg and the ropes hung 20? from the vertical. Into which of the following

1 Points DETAILS 3 in 00 O 54 O 45 O 37 O 35 O 53 For the solid cylinder shown above, the ratio of volume to total surface area is

(17) Problem 4 A baseball of mass m, 0.38 kg is thrown at another ball hanging from the ceiling by a length of string L1.95 m. The second ball m 0.95 kg is initially at rest while the baseball has an initial horizontal velocity of V 3.5 ms. After the collision the first baseball falls straight down (no horizontal velocity.) Randomized Variables

(10) Problem 4 A rectangular loop with L, 0.15 m and L0.65 m is sitting in a magnetic field B0.75 T as shown in the figure. There is a counterclockwise current 0.45 A in the loop. Calculate the numerical value of the total torque in Nm. TH 100 d C J Otheexpertta.com Grade Summary Deductions Potential 0 100

1500-W heater is connected to a 120-V line for 2.0 hours. How much heat energy is produced? A) 1.5 kJ B) 11 MJ C) 0.18 MJ D) 3.0 kJ

A10.0 nC charge is located at position (x,y)(2.0cm,1.0cm). Part A At what (x,y) position is the electric field 225,000NC Express your answers using two significant figures. Enter your answers numerically separated by a comma. Part B At what (x,y) position is the electric field (161,00080,500)NC Express your answers using two significant figures.

A 250 8,25cmdiameter plastic disk is spun on anaxle through its center by an electric motor. What torque must the motor supply to take the disk from Oto 1600 rpm in 4.8 s Express your answer using two significant figures.(answerNm)

Problem 3 There is a magnetic field of magnitude B 2t which is directed out of the page. (The magnitude increases with time) Calculate the induced current on the square loop of side a at t2. What is the direction of the current

1.) A concave mirror forms a real image at 17.0 cm from themirror surface along the principal axis. if the correspondingobject is at a distance of 36.0 cm, what is the mirrors focallength? 2.) The critical angle of refraction or calcite is 68.4 degreeswhen it forms a boundary with water. use this information todetermine the speed of light in

the circuit shown below if the 2 7.50 W 6.81 5 ww 9.10 9.10 www w 3.60 0

Line Charge and Charged Cylindrical Shell 1 3 4 5 6 7 8 An infinite line of charge with linear density A 7.4 Cm is positioned along the axis of a thick insulating shell of inner radius a 2.3 cm and outer radius b 4.2 cm. The insulating shell is uniformly charged with a volume density of p 511 Cm. 1) What is A, the linear charge density of the

1. Which, if any,of these people are nearsighted (myopic)? List the first letter of all correct answers in alphabeticalorder. For example, if Avishka and Edouard are the only nearsightedones, enter AE. 2.Which, if any, of these people require bifocals to correcttheir vision? 3.Which, if any, of these people's vision can be corrected usingonly

The near point (the smallest distance at which an object can be seen clearly) and the far point (the largest distance at which an object can be seen clearly) are measured for six different people. near point far point (cm) (cm) Avishka 40 Berenice 30 300 Chadwick 25 500 Danya 25 Edouard 80 Francesca 50 200

(10) Problem 6 An electric current is flowing through a long cylindrical conductor with radius a 0.15 m. The current density J 6.5 Am is uniform in the cylinder. In this problem we consider an imaginary cylinder with radius r around the axis AB. A a 1111 B J Oth,Part (a) When r is less than a, express the current inside the imaginary cylinder

3 A small ball is launched at an angle of 30.0 degrees above the horizontal. It reaches a maximum height of 2.5 m with respect to the launch position. Find (a) the initial velocity of the ball when its launched and (b) its range, defined as the horizontal distance traveled until it returns to his original height. As always you can ignore air

Newton's third laws, free body diagrams

1. A string is tied to a book and pulled lightly as shown at right. The book remains in contact with the table and does not move. a. Draw a freebody diagram for the book. Label each of the forces exerted on the book as you were instructed in the tutorial Forces.od od noboners NTB TsB EB String 2. a. Consider the following statement made by a

1. When there is no friction, what is the magnitude of acceleration on the block? 2. With friction, acceleration = 2.49 m/s^2. What is the coefficient of kinetic friction between plane/block? 3. To keep the mass from accelerating, a spring is attached with spring constant k = 167 N/m. What is the coefficient of static friction if the spring must

456 m A block with mass m 9.2 kg is on an incline with an angle 0 25 with respect to the horizontal. For the first question there is no friction between the incline and the block.

2. The ideal gas model is valid if which of the followingconditions is true? The gas density is low. The gas density is high. The temperature is low. The temperature is high. The gas density and thetemperature are low. The gas density and thetemperature are high. The gas density is high andthe temperature is low. The gas density is low and the

(10) Problem 1 You stand at the top of a deep well. To determine the depth (D) of the well you drop a rock from the top of the well and listen for the splash as the water hits the waters surface. The splash arrives t 4.2 s after you drop the rock. The speed of sound in the well is v. 331 ms. D theexpertta.com 50 Part (a) Find the quadratic

(33) Problem 2 A merrygoround is a playground ride that consists of a large disk mounted to that it can freely rotate in a horizontal plane. The merrygoround shown is initially at rest, has a radius R 1.3 meters, and a mass M 286 kg. A small boy of mass m 49 kg runs tangentially to the merrygoround at a speed of v 1.1 ms, and jumps on.

(10) Problem 4 You place your ear onto a steel railroad track and hear the sound of a distant train through the rails At 3.9 seconds faster than you do through the air. The speed of sound in steel is vs 6100 ms while in air the speed of sound is va 343 ms. ta 25 Part (a) Write an equation for the time it takes the sound to reach you through

22. Two blocks are connected by a massless rope. The rope passes over an ideal (frictionless and massless) pulley such that one block with mass m 12.25 kg is on a horizontal table and the other block with mass m2 6.5 kg hangs vertically. Both blocks experience gravity and the tension force, T. Use the coordinate system specified in the diagram.

2. DETAILS Consider the circuit shown in the figure below, where L 5.50 mH and R 495 0. The switch S can be positioned at either a or b. 24.0 V R MY NOTES (a) When the switch is at position a, the time constant is 14.9 us. What is R, (in KQ) kn (b) What is the current in the inductor at the instant the switch is thrown to position b MA ASK YOUR

Draw out and use principle of superposition.

4. The graph shows a snapshot of two waves on a string moving towards each other at time t 0 sec. The pulse on the left has a velocity of 1.0 ms and the pulse on the right has a velocity of 1.0 ms. The horizontal axis is the position down the length of the string measured in meters and the vertical axis shows the displacement of the wave in

A 2.4 nC charge is at the origin and a -4.8 nC charge is at x = 1.1 cm . Part A At what x -coordinate could you place a proton so that it would experience no net force? Express your answer to two significant figures and include the appropriate units. SubmitHintsMy AnswersGive UpReview Part Incorrect; Try Again; 5 attempts remaining Part B Would

Problem 25.42 A 2.4 nC charge is at the origin and a 4.8 nC charge is at z 1.1 cm Part A At what zcoordinate could you place a proton so that it would experience no net force Express your answer to two significant figures and include the appropriate units. C Z .46 Submit 4 O No O Yes cm Submit My Answers Give Up Incorrect Try Again 5 attempts

Problem 4.50 A person pushes a 12.5 kg lawn mower at constant speed with a force of 88.5 N directed along the handle, which is at an angle of 45.0 to the horizontal. Part A Draw the freebody diagram showing all forons acting on the mower Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. Submit

14. In the circuit shown, what is the current drawn from the 18 V battery (1) 10.0 A (2) 8.0 A In (3) 5.5 A (4) 4.5 A (5) 6.5 A ww 60 www 36 V 1892 18 V

3. The bulbs in the circuit at right are identical and the battery is ideal. a. Consider the circuit as shown. i. Rank bulbs A, B, and C according to brightness, from brightest to dimmest. Explain how you determined your answer. ii. Rank the voltages across the bulbs, in order from greatest to smallest. Explain. iii. Write an equation that relates

A +25 nC charge is at the origin. How much farther from the charge is the2000 V equipotential surface thanthe 3000 V surface?

A 10cm10cm10cm wood block with a density of 670 kg/m3 floatsin water. Part A) What is the distance from the top of the block to thewater if the water is fresh? Express your answer totwo significant figures and include the appropriateunits. Part B) If it's seawater? Supposethat ? =1030kg/m3. Express your answer totwo significant figures and include

An 1865kg airplane starts at rest on an airport runway at sea level. What is the change in mechanical energy of the airplane if it climbs to a cruising altitude of 2320 m and maintains a constant speed of 97.5 ms 51.3 MJ Submit Correct My Answers Give Up Part B What cruising speed would the plane need at this altitude if its increase in kinetic

27) The angular momentum of a system remains constant A) all the time since it is a conserved quantity. B) when no torque acts on the system. C) when no net external force acts on the system. D) when the total kinetic energy is constant. E) when the linear momentum and the energy are constant. 28) While spinning down from 500.0 rpm to rest, a

20) If a single lens forms a virtual image of an object, then A) The lens could be either a diverging or a converging lens. B) The lens must be a diverging lens. C) The lens must be a converging lens. D) The image must be inverted. 21) Which statement about thin lenses is correct In each case, we are considering only a single lens. A) A diverging

A 62.0-kg skier is movingat 6.90 m/s on a frictionless, horizontal,snow-covered plateau when she encounters a roughpatch 4.50 m long. The coefficient of kineticfriction between this patch and her skis is 0.300. After crossingthe rough patch and returning to friction-free snow, she skis downan icy, frictionless hill 2.50 m high. A. How fast is the

A 5.0C charge experiences a 0.41N force in the positive y direction. If this charge is replaced with a 2.7C charge, find the magnitude of the force in this case. 1) Express your answer using two significant figures. 1A N 2) Find the direction of the force in this case. in the positive y direction in the negative y direction perpendicular to the

a 10% efficient engine accelerates a 1500 kg car from rest to 15 m/s. how much energy is transferred to the engine by burning gasoline?

Which one of the following is a characteristic of a compound microscope? A) The objective is a diverging lens. B) The eyepieceis a diverging lens. C) The final image is real. D) The imageformed by the objective is virtual. E) The image formed by theobjective is real.

1)How should electric field lines be drawn close to a point charge? 2)True or false: the points where the potential is the same in 3-D space lie on a surface.

1. The spectrum of an excited gas is a series of discretelines because a. In multielectron atoms, each electron emits a certain,unique wavelength. b. Different atoms in the gas have different ionizationstates. c. Other wavelengths are absorbed by the gas. d. Electrons exist in quantized energy states, and onlycertain transitions are possible. 2. A

1) What is the speed of a person ?stuck? to the wall? (15.6) 2) What is the normal force of the wall on a riderof m = 51 kg? (1748) 3) What is the minimum coefficient of friction needed betweenthe wall and the person? (0.28) 4) If a new person with mass 102 kg rides the ride, what minimumcoefficient of friction between the wall and the person

2 In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. Once the room gets spinning fast enough, the floor drops from the bottom of the room Friction between the walls of the room and the people on the ride make them the stick to the wall so they do not slide down. In one ride, the radius of the cylindrical

1/ s +1/ s ?=1/ f . m = ? s ?/ s What is the magnification m ? Use your answer fromPart F. Express your answer in termsof f and s .

1. Initially, the switch in the figure to the right is open andthe capacitor is uncharged. How much charge flows through theswitch after the switch is closed for a while? ------------------------------------------------------------------------------------------------------------------------------------------------- 2. a. What is the electric

1.5 V Switch 10 F

1. Calculate the angular velocity (in {rm rad/s}) of the second, minute, and hour hands on a wall clock. 2. What is the period of each of these hands?

A 150 W lamp is placed into a 120 V AC outlet. (a) What are the peak and rms currents? (b) What is the resistance of the lamp?

In an 8.00km race, one runner runs at a steady 11.8 km/hr andanother runs at 15.0 km/hr. How far from the finish line is theslower runner when the faster runner finishes the race?

1. Two coins rotate on a turntable. Coin B is twice as far fromthe axis as coin A. The angular velocity of A is _______ that of B.The centripetal acceleration of A is _________ that of B. a. Quarter b. half c. Equal d. Twice e. four times

4. A block of mass m is attached to a wall by a massless spring, as shown. The spring is initially neither stretched nor compressed, and there is no friction between the block and the surface. At time t, a string begins pulling the block to the right with a constant force. The block moves a distance d before turning around and returning to the

In the animation below, a parallelplate capacitor is connected in series with a battery and a switch. Blue dots are arranged within the conducting plates and connecting wires with spacing that indicates a surplus (close spacing) or deficit (wide spacing) of electrons. The net charge on each capacitor plate is also indicated with color.

(23) Problem 3 Consider a transformer, used to recharge rechargeable flashlight batteries, that has 500 turns in its primary coil, 5 turns in its secondary coil, and an input voltage of 120 V. Randomized Variables n5 33 Part (a) What is the voltage output V, in volts, of the transformer used for to charge the batteries V I cos() asin() sin()

3. (1) Imagine repeating the timing experiments you ran in this lab, only this time starting with a partiallycharged capacitor. Describe how the timings differ from above. Explain how this difference originates from specific electrical quantities in the circuit (e.g. charge, voltage, etc.).

10) Three particles travel through a region of space where the magnetic field is out of the page, as shown in the figure. The electric charge of each of the three particles is, respectively, 040 00 OO 030 0 00 O a) 1 is neutral, 2 is negative, and 3 is positive. b) 1 is neutral, 2 is positive, and 3 is negative. c) 1 is positive, 2 is neutral, and

1/What is the total distance Delta x traveled by the particle? Express your answer in meters. 2/What is the average velocity Vav of the particle over the time interval Delta t= 50.0 s ? Express your answer in meters per second. 3/ What is the instantaneous velocity v of the particle at t=10.0s ? Express your answer in meters per second.

U (ms) 0.8 0.6 0.4 0.2 0 10 20 30 40 50 t(s)

(10) Problem 4 Two billiard balls with the same mass m move in the direction of one another. Ball one moves in the positive xdirection with a speed of v, and ball two moves in the negative xdirection with a speed of 2. The two balls collide elastically, and both balls change direction after the collision. If the initial speeds of the balls were v,

1. What is the gauge pressure at point A inPa? 2. What is the gauge pressure at point C inPa? 3. What is the pressure difference betweenpoints B and A in Pa?

1. Find the minimum magnitude of the acceleration amin of the car. 2. Find the maximum acceleration amax of the car. Express your answer in meters per second per second to the nearest integer. 3. Find the distance d0,2 traveled by the car between t=0s and t=2s. Express your answer in meters to the nearest integer.

The Graph of a Sports Cars Velocity The graph in the figure shows the velocity v of a sports car as a function of time t. Use the graph to answer the following questions. 2 (s) 6

1. Hummingbirds may seem fragile, but their wings are capable of sustaining very large forces and accelerations(Figure 1) shows data for the vertical position of the wing tip of a rufous hummingbird. a) What is the maximum acceleration of the wing tips, in m/s2? b) What is the maximum acceleration of the wing tips, in units of g ? 2.Bungee Man is

Figure 1 y (mm) 40 0 of 1 401 20 40 1 (ms) 60

2. (1) Imagine a singleloop circuit with a battery, two wires, and a 10 Ohm resistor. The wires are also ohmic, but with a resistance much smaller (not ignorable) than the 10 Ohm resistor. Consider all circuit elements except for the battery, and answer the following questions a. (0.5) Is any physical quantity among current, potential difference,

1. What distance does the car cover in the first 4.0 seconds of its motion? (Express your answer using two significant figures) 2. What distance does the car cover in the last 2.0 seconds of its motion? (Express your answer using two significant figures) 3. What is the constant speed V that characterizes the middle portion of its motion? (Express

1. Henry is standing on a scale inside of an elevator. The scale measures Henrys apparent weight as the elevator accelerates upward and downward. The elevator, initially at rest, begins to move at t0s. Figure 1 shows the reading on the scale during the next 12s. Assume that the elevator is moving with constant velocity from t2s until t10s. (a)

inta 1 9) In a perfectly ELASTIC collision between two perfectly rigid objects A) both the momentum and the kinetic energy of the system are conserved. B) the momentum of each object is conserved. C) the momentum of the system is conserved but the kinetic energy of the system is not conserved. D) the kinetic energy of the system is conserved, but

A 710kg car drives at a constant speed of 23m/s . Itis subject to a drag force of 500 N. What power is required fromthe car's engine to drive the car (a) on level ground? (b) up ahill with a slope of 2.0? ?

S eted eted eted (6) Problem 8 A combination of series and parallel connections of capacitors is depicted in the figure. Randomized Variables C 18 F C6.09 F C31.85 F Find the total capacitance of the combination of capacitors, in microfarads. C sin() cotan() atan() cosh() cos() asin() acotan() tanh() Degrees Submit Hints 16 deduction per hint.

1.Cells in the nervous system have a potential differenceof 70 mV across the cell membrane separating theinterior of the cell from the extracellular fluid. This potentialdifference is maintained by ion pumps that move charged ions acrossthe membrane. Is this an emf? Select the correct answer and explanation. 1)No. The ion pumps cannot separate

A 100 W lightbulb is brighter thana 60 W lightbulb when both operate at the samevoltage of 120 V.If, instead, they were both operated atthe same current of 0.5 A, which would be brighter?Select the correct answer and explanation.If, instead, they wereboth operated at the same current of 0.5 , whichwould be brighter? Select the correct answer and

A 1.00 kg ball is thrown directly upward with an initial speed of 16.0 m/s. A graph of the ball's gravitational potential energy vs. height, Ug(h), for an arbitrary initial velocity. The zero point of gravitational potential energy is located at the height at which the ball leaves the thrower's hand. Draw a new gravitational potential energy vs.