A series of weights connected by very light cords are given an upward acceleration of 4.00 m/s2 by a pull P,as shown in the figure.A,B,and C are the tensions in the connecting cords.The pull P is closest to

A) 690 N. B) 490 N. C) 290 N. D) 200 N. E) 50 N. A) 690 N. B) 490 N. C) 290 N. D) 200 N. E) 50 N.

A certain CD-ROM disk can store approximately 6.0 × 102 megabytes of information,where 106 bytes = 1 megabyte. If an average word requires 9.0 bytes of storage,how many words can be stored on one disk?

A) 6.7 × 107 words B) 5.4 × 109 words C) 2.1 × 107 words D) 2.0 × 109 words A) 6.7 × 107 words B) 5.4 × 109 words C) 2.1 × 107 words D) 2.0 × 109 words

Exam 1: A: Foundations

A 12.0-N object is oscillating in simple harmonic motion at the end of an ideal vertical spring.Its vertical position y as a function of time t is given by y(t)= 4.50 cm cos[(19.5 s^-1)t - π/8]. (a)What is the spring constant of the spring? (b)What is the maximum acceleration of the object? (c)What is the maximum speed that the object reaches? (d)How long does it take the object to go from its highest point to its lowest point?

(Short Answer)

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Question 1221

Jason takes off from rest across level water on his jet-powered skis.The combined mass of Jason and his skis is 75 kg (the mass of the fuel is negligible).The skis have a thrust of 200 N and a coefficient of kinetic friction on water of 0.10.Unfortunately,the skis run out of fuel after only 48 s.What is Jason's top speed?

(Multiple Choice)

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Question 1222

A series of weights connected by very light cords are given an upward acceleration of 4.00 m/s² by a pull P,as shown in the figure.A,B,and C are the tensions in the connecting cords.The pull P is closest to

(Multiple Choice)

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(71)

Question 1223

The figure shows two tiny 5.0-g spheres suspended from two very thin 1.0-m-long threads.The spheres repel each other after being charged to +91 nC and hang at rest as shown.What is the angle θ? (k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

(Multiple Choice)

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Question 1224

The reason an astronaut in an earth satellite feels weightless is that

(Multiple Choice)

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Question 1225

A solenoid of length 0.700 m having a circular cross-section of radius 5.00 cm stores 6.00 µJ of energy when a 0.400-A current runs through it.What is the winding density of the solenoid? (μ₀ = 4π × 10^-⁷ T • m/A)

(Multiple Choice)

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Question 1226

The figure shows two long,parallel current-carrying wires.The wires carry equal currents I₁ = I₂ = 20 A in the directions indicated and are located a distance d = 0.5 m apart.Calculate the magnitude and direction of the magnetic field at the point P that is located an equal distance d from each wire.(μ₀ = 4π × 10^-7 T • m/A)

(Multiple Choice)

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Question 1227

The length and width of a rectangle are 1.125 m and 0.606 m,respectively. Multiplying,your calculator gives the product as 0.68175. Rounding properly to the correct number of significant figures,the area should be written as

(Multiple Choice)

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Question 1228

A hollow steel ball of diameter 3.0 m barely floats in water.What is the thickness of the wall of the ball? The density of iron is 7.87 g/cm³ and that of water is 1000 kg/cc

(Multiple Choice)

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Question 1229

A solid uniform brick is placed on a sheet of wood.When one end of the sheet is raised (see figure),you observe that the maximum that the angle θ can be without tipping over the brick is 49.6°.There is enough friction to prevent the brick from sliding.What is the width w of the brick?

(Multiple Choice)

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Question 1230

A series circuit has a resistance of 4.0 Ω,a reactance (due to the capacitance)of 21.0 Ω,and a reactance (due to the inductance)of 17.0 Ω.Find the impedance of the circuit.

(Multiple Choice)

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Question 1231

A 3.0-μC positive point charge is located at the origin and a 2.0 μC positive point charge is located at X = 0.00 m,y = 1.0 m. Find the coordinates of the point where the net electric field strength due to these charges is zero.

(Multiple Choice)

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Question 1232

Two space stations are at rest relative to each other and are 6.0 × 10⁷ m apart,as measured by observers on the stations.A spaceship traveling from one station to the other at 0.90c relative to the stations passes both of them,one after the other.As measured by an observer in the spaceship,how long does it take to travel from one station to the other? (c = 3.00 × 10⁸ m/s)

(Multiple Choice)

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Question 1233

A certain CD-ROM disk can store approximately 6.0 × 10² megabytes of information,where 10⁶ bytes = 1 megabyte. If an average word requires 9.0 bytes of storage,how many words can be stored on one disk?

(Multiple Choice)

5.0/5

(76)

Question 1234

A refrigerator has a coefficient of performance of 1.15,and it extracts 7.95 J of heat from the cold reservoir during each cycle. (a)How much work is done on the gas in each cycle? (b)How much heat is exhausted into the hot reservoir in each cycle?

(Short Answer)

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Question 1235

When a 20.0-ohm resistor is connected across the terminals of a 12.0-V battery,the voltage across the terminals of the battery falls by 0.300 V.What is the internal resistance of this battery?

(Multiple Choice)

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Question 1236

A Ferris wheel has diameter of 10 m and makes one revolution in 8.0 seconds.A person weighing 670 N is sitting on one of the benches attached at the rim of the wheel.What is the apparent weight (that is,the normal force exerted on her by the bench)of the person as she passes through the highest point of her motion?

(Short Answer)

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Question 1237

A proton in a certain particle accelerator has a kinetic energy that is equal to its rest energy.What is the momentum of the proton as measured by a physicist working with the accelerator? (c = 3.00 × 10⁸ m/s,m_proton = 1.67 × 10^-27 kg)

(Multiple Choice)

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Question 1238

For the circuit shown in the figure,determine the current in (a)the 1.0-Ω resistor. (b)the 3.0-Ω resistor. (c)the 4.0-Ω resistor.

(Short Answer)

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Question 1239

A planar electromagnetic wave is propagating in the +x direction.At a certain point P and at a given instant,the electric field of the wave is given by = (0.082 V/m) )What is the magnetic vector of the wave at the point P at that instant? (c = 3.0 × 10⁸ m/s)

(Multiple Choice)

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Question 1240

Showing 1221 - 1240 of 1480

Exam 1: A: Foundations

A series of weights connected by very light cords are given an upward acceleration of 4.00 m/s2 by a pull P,as shown in the figure.A,B,and C are the tensions in the connecting cords.The pull P is closest to

The figure shows two tiny 5.0-g spheres suspended from two very thin 1.0-m-long threads.The spheres repel each other after being charged to +91 nC and hang at rest as shown.What is the angle θ? (k = 1/4πε0 = 8.99 × 109 N • m2/C2)

The reason an astronaut in an earth satellite feels weightless is that

A solenoid of length 0.700 m having a circular cross-section of radius 5.00 cm stores 6.00 µJ of energy when a 0.400-A current runs through it.What is the winding density of the solenoid? (μ0 = 4π × 10-7 T • m/A)

The length and width of a rectangle are 1.125 m and 0.606 m,respectively. Multiplying,your calculator gives the product as 0.68175. Rounding properly to the correct number of significant figures,the area should be written as

A hollow steel ball of diameter 3.0 m barely floats in water.What is the thickness of the wall of the ball? The density of iron is 7.87 g/cm3 and that of water is 1000 kg/cc

A solid uniform brick is placed on a sheet of wood.When one end of the sheet is raised (see figure),you observe that the maximum that the angle θ can be without tipping over the brick is 49.6°.There is enough friction to prevent the brick from sliding.What is the width w of the brick?

A series circuit has a resistance of 4.0 Ω,a reactance (due to the capacitance)of 21.0 Ω,and a reactance (due to the inductance)of 17.0 Ω.Find the impedance of the circuit.

A 3.0-μC positive point charge is located at the origin and a 2.0 μC positive point charge is located at X = 0.00 m,y = 1.0 m. Find the coordinates of the point where the net electric field strength due to these charges is zero.

A certain CD-ROM disk can store approximately 6.0 × 102 megabytes of information,where 106 bytes = 1 megabyte. If an average word requires 9.0 bytes of storage,how many words can be stored on one disk?

A refrigerator has a coefficient of performance of 1.15,and it extracts 7.95 J of heat from the cold reservoir during each cycle. (a)How much work is done on the gas in each cycle? (b)How much heat is exhausted into the hot reservoir in each cycle?

When a 20.0-ohm resistor is connected across the terminals of a 12.0-V battery,the voltage across the terminals of the battery falls by 0.300 V.What is the internal resistance of this battery?

A proton in a certain particle accelerator has a kinetic energy that is equal to its rest energy.What is the momentum of the proton as measured by a physicist working with the accelerator? (c = 3.00 × 108 m/s,mproton = 1.67 × 10-27 kg)

For the circuit shown in the figure,determine the current in (a)the 1.0-Ω resistor. (b)the 3.0-Ω resistor. (c)the 4.0-Ω resistor.

A planar electromagnetic wave is propagating in the +x direction.At a certain point P and at a given instant,the electric field of the wave is given by = (0.082 V/m) )What is the magnetic vector of the wave at the point P at that instant? (c = 3.0 × 108 m/s)

Foundations

Motion in One Dimension

Acceleration

Momentum

Energy

Principle of Relativity

Interactions

Force

Work

Motion in a Plane

Motion in a Circle

Torque

Gravity

Special Relativity

Periodic Motion

Waves in One Dimension

Waves in Two and Three Dimensions

Fluids

Entropy

Energy Transferred Thermally

Degradation of Energy

Electric Interactions

The Electric Field

Gausss Law

Work and Energy in Electrostatics

Charge Separation and Storage

Magnetic Interactions

Magnetic Fields of Charged Particles in Motion

Changing Magnetic Fields

Changing Electric Fields

Electric Circuits

Electronics

Ray Optics

Wave and Particle Optics

Filters

A series of weights connected by very light cords are given an upward acceleration of 4.00 m/s² by a pull P,as shown in the figure.A,B,and C are the tensions in the connecting cords.The pull P is closest to

The figure shows two tiny 5.0-g spheres suspended from two very thin 1.0-m-long threads.The spheres repel each other after being charged to +91 nC and hang at rest as shown.What is the angle θ? (k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

A solenoid of length 0.700 m having a circular cross-section of radius 5.00 cm stores 6.00 µJ of energy when a 0.400-A current runs through it.What is the winding density of the solenoid? (μ₀ = 4π × 10^-⁷ T • m/A)

A hollow steel ball of diameter 3.0 m barely floats in water.What is the thickness of the wall of the ball? The density of iron is 7.87 g/cm³ and that of water is 1000 kg/cc

A certain CD-ROM disk can store approximately 6.0 × 10² megabytes of information,where 10⁶ bytes = 1 megabyte. If an average word requires 9.0 bytes of storage,how many words can be stored on one disk?

A proton in a certain particle accelerator has a kinetic energy that is equal to its rest energy.What is the momentum of the proton as measured by a physicist working with the accelerator? (c = 3.00 × 10⁸ m/s,m_proton = 1.67 × 10^-27 kg)

A planar electromagnetic wave is propagating in the +x direction.At a certain point P and at a given instant,the electric field of the wave is given by = (0.082 V/m) )What is the magnetic vector of the wave at the point P at that instant? (c = 3.0 × 10⁸ m/s)