Question 1

What is the gravitational force on a 20-kg satellite circling the Earth (radius = 6.4* 106 m,mass = 6.0 * 1024 kg)with a period of 5.0 h?

Accepted Answer

A) 88 N 
B) 55 N 
C) 36 N 
D) 98 N 
E) 18 N 
A) 88 N 
B) 55 N 
C) 36 N 
D) 98 N 
E) 18 N

Question 2

What is the kinetic energy of a 200-kg satellite as it follows a circular orbit of radius 8.0 *106 m around the Earth? (Mass of Earth = 6.0 *1024 kg. )

Accepted Answer

A) 5.0 * 109 J 
B) 1.0 * 1010 J 
C) 1.5* 1010 J 
D) 2.0 * 1010 J 
E) 2.5 * 109 J 
A) 5.0 * 109 J 
B) 1.0 * 1010 J 
C) 1.5* 1010 J 
D) 2.0 * 1010 J 
E) 2.5 * 109 J

Question 3

The figure below shows a planet traveling in a clockwise direction on an elliptical path around a star located at one focus of the ellipse.When the planet is at point A,

Accepted Answer

A) its speed is constant. 
B) its speed is increasing. 
C) its speed is decreasing. 
D) its speed is a maximum. 
E) its speed is a minimum. 
A) its speed is constant. 
B) its speed is increasing. 
C) its speed is decreasing. 
D) its speed is a maximum. 
E) its speed is a minimum.

Question 4

When a falling meteor is at a distance above the Earth's surface of 3 times the Earth's radius,what is its acceleration due to the Earth's gravity?

Accepted Answer

The answer of When a falling meteor is at a...

Question 5

What is the period of revolution of a planet in circular orbit around a star of 4.0 solar masses if it is at a distance from the star equal to that of the Earth from the Sun?

Accepted Answer

The answer of What is the period of revolution of...

Question 6

Calculate the Earth's angular momentum in the approximation that treats the Earth's orbit around the sun as a circle.(MSun = 1.99 *1030 kg;T = 3.156 *107 s;ME = 5.98 * 1024 kg. )

Accepted Answer

2.67 * 10<

Question 7

Three 5.0-kg masses are located at points in the xy plane,as shown.What is the magnitude of the resultant force (caused by the other two masses)on the mass at x = 0,y = 0.30 m?

Accepted Answer

A) 2.6 *10-8 N 
B) 2.0 *10-8 N 
C) 2.9 *10-8 N 
D) 2.3 *10-8 N 
E) 2.1 * 10-8 N 
A) 2.6 *10-8 N 
B) 2.0 *10-8 N 
C) 2.9 *10-8 N 
D) 2.3 *10-8 N 
E) 2.1 * 10-8 N

Question 8

For the following allowed transitions,which photon would have the largest wavelength when an electron "jumps" from one energy level,characterized by the quantum number n,to another?

Accepted Answer

A) n = 2 to n = 1 
B) n = 3 to n = 2 
C) n = 3 to n = 1 
D) n = 1 to n = 3 
E) n = 4 to n = 1 
A) n = 2 to n = 1 
B) n = 3 to n = 2 
C) n = 3 to n = 1 
D) n = 1 to n = 3 
E) n = 4 to n = 1

Question 9

Exhibit 13-1
 Three 5.0-kg masses are located at points in the xy plane as shown in the figure.   Use this exhibit to answer the following question(s).
-Refer to Exhibit 13-1.What is the magnitude of the resultant force (caused by the other two masses)on the mass at the origin?

Accepted Answer

A) 2.7 *10 - 8 N 
B) 2.1 *10 - 8 N 
C) 1.8 *10 - 8 N 
D) 2.4 *10 - 8 N 
E) 2.9 *10 - 8 N 
A) 2.7 *10 - 8 N 
B) 2.1 *10 - 8 N 
C) 1.8 *10 - 8 N 
D) 2.4 *10 - 8 N 
E) 2.9 *10 - 8 N

Question 10

An electron in a hydrogen atom makes a transition from the n = 4 to the n = 3 energy state.Determine the energy (in eV)of the emitted photon.

Accepted Answer

A) 0.54 
B) 0.66 
C) 0.85 
D) 1.51 
E) 10.2 
A) 0.54 
B) 0.66 
C) 0.85 
D) 1.51 
E) 10.2

Question 11

A projectile is launched from the surface of a planet (mass = M,radius = R).What minimum launch speed is required if the projectile is to rise to a height of 2R above the surface of the planet? Disregard any dissipative effects of the atmosphere.

Accepted Answer

A)  $\left[ \frac { 4 G M } { 3 R } \right] ^ { 1 / 2 }$ 
B)  $\left[ \frac { 8 G M } { 5 R } \right] ^ { 1 / 2 }$ 
C)  $\left[ \frac { 3 G M } { 2 R } \right] ^ { 1 / 2 }$ 
D)  $\left[ \frac { 5 G M } { 3 R } \right] ^ { 1 / 2 }$ 
E)  $\left[ \frac { G M } { 3 R } \right] ^ { 1 / 2 }$ 
A)  $\left[ \frac { 4 G M } { 3 R } \right] ^ { 1 / 2 }$ 
B)  $\left[ \frac { 8 G M } { 5 R } \right] ^ { 1 / 2 }$ 
C)  $\left[ \frac { 3 G M } { 2 R } \right] ^ { 1 / 2 }$ 
D)  $\left[ \frac { 5 G M } { 3 R } \right] ^ { 1 / 2 }$ 
E)  $\left[ \frac { G M } { 3 R } \right] ^ { 1 / 2 }$

Question 12

A spacecraft (mass = m)orbits a planet (mass = M)in a circular orbit (radius = R).What is the minimum energy required to send this spacecraft to a distant point in space where the gravitational force on the spacecraft by the planet is negligible?

Accepted Answer

A) GmM/(4R) 
B) GmM/R 
C) GmM/(2R) 
D) GmM/(3R) 
E) 2GmM/(5R) 
A) GmM/(4R) 
B) GmM/R 
C) GmM/(2R) 
D) GmM/(3R) 
E) 2GmM/(5R)

Question 13

Suppose a beam of electrons is incident on a collection of hydrogen atoms,all of which are in the lowest energy state (n = 1).What is the minimum energy the electrons can have if they are to excite the hydrogen atoms into the n = 2 state?

Accepted Answer

The answer of Suppose a beam of electrons is incident...

Question 14

What wavelength (in $\mu$m)is associated with the Paschen series for n = 4? (RH = 1.097*107 m - 1)

Accepted Answer

A) 320 
B) 530 
C) 2.7 
D) 1.9 
E) 0.5 
A) 320 
B) 530 
C) 2.7 
D) 1.9 
E) 0.5

Question 15

What is the difference in wavelength for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097 *107 m - 1. )

Accepted Answer

A) 1.0 *10 - 10 m 
B) 2.0 *10 - 10 m 
C) 4.1 *10 - 10 m 
D) 8.1 *10 - 10 m 
E) 1.6 *10 - 9 m 
A) 1.0 *10 - 10 m 
B) 2.0 *10 - 10 m 
C) 4.1 *10 - 10 m 
D) 8.1 *10 - 10 m 
E) 1.6 *10 - 9 m

Question 16

A satellite is placed in a geosynchronous orbit.In this equatorial orbit with a period of 24 hours,the satellite hovers over one point on the equator.Which statement is true for a satellite in such an orbit?

Accepted Answer

A) There is no gravitational force on the satellite. 
B) There is no acceleration toward the center of the Earth. 
C) The satellite is in a state of free fall toward the Earth. 
D) There is a tangential force that helps the satellite keep up with the rotation of the Earth. 
E) The force toward the center of the Earth is balanced by a force away from the center of the Earth. 
A) There is no gravitational force on the satellite. 
B) There is no acceleration toward the center of the Earth. 
C) The satellite is in a state of free fall toward the Earth. 
D) There is a tangential force that helps the satellite keep up with the rotation of the Earth. 
E) The force toward the center of the Earth is balanced by a force away from the center of the Earth.

Question 17

The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse.When the planet is at point A,

Accepted Answer

A) its speed is constant. 
B) its speed is increasing. 
C) its speed is decreasing. 
D) its speed is a maximum. 
E) its speed is a minimum. 
A) its speed is constant. 
B) its speed is increasing. 
C) its speed is decreasing. 
D) its speed is a maximum. 
E) its speed is a minimum.

Question 18

The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse.When the planet is at point A,

Accepted Answer

A) its speed is constant. 
B) its speed is increasing. 
C) its speed is decreasing. 
D) its speed is a maximum. 
E) its speed is a minimum. 
A) its speed is constant. 
B) its speed is increasing. 
C) its speed is decreasing. 
D) its speed is a maximum. 
E) its speed is a minimum.

Question 19

A Li2+ ion undergoes a transition from the n = 4 to the n = 3 state.The energy of the emitted photon is

Accepted Answer

A) 4.5 eV 
B) 10.2 eV 
C) 5.95 eV 
D) 2.6 eV 
E) 0.66 eV 
A) 4.5 eV 
B) 10.2 eV 
C) 5.95 eV 
D) 2.6 eV 
E) 0.66 eV

Question 20

Three galaxies,each of mass M = 4.0 *1041 kg,lie in a plane at the corners of an equilateral triangle with sides of 5.0 * 1022 m length.The magnitude of the force the other two galaxies exert on each galaxy is

Accepted Answer

A) 4.3 * 1027 N. 
B) 6.4 * 1027 N. 
C) 7.4*1027 N. 
D) 8.6 * 1027 N. 
E) 4.3 * 1028 N. 
A) 4.3 * 1027 N. 
B) 6.4 * 1027 N. 
C) 7.4*1027 N. 
D) 8.6 * 1027 N. 
E) 4.3 * 1028 N.

Exam 11: Gravity,planetary Orbits,and the Hydrogen Atom

What is the gravitational force on a 20-kg satellite circling the Earth (radius = 6.4* 106 m,mass = 6.0 * 1024 kg)with a period of 5.0 h?

What is the kinetic energy of a 200-kg satellite as it follows a circular orbit of radius 8.0 *106 m around the Earth? (Mass of Earth = 6.0 *1024 kg. )

The figure below shows a planet traveling in a clockwise direction on an elliptical path around a star located at one focus of the ellipse.When the planet is at point A,

When a falling meteor is at a distance above the Earth's surface of 3 times the Earth's radius,what is its acceleration due to the Earth's gravity?

What is the period of revolution of a planet in circular orbit around a star of 4.0 solar masses if it is at a distance from the star equal to that of the Earth from the Sun?

Calculate the Earth's angular momentum in the approximation that treats the Earth's orbit around the sun as a circle.(MSun = 1.99 *1030 kg;T = 3.156 *107 s;ME = 5.98 * 1024 kg. )

Three 5.0-kg masses are located at points in the xy plane,as shown.What is the magnitude of the resultant force (caused by the other two masses)on the mass at x = 0,y = 0.30 m?

For the following allowed transitions,which photon would have the largest wavelength when an electron "jumps" from one energy level,characterized by the quantum number n,to another?

Exhibit 13-1 Three 5.0-kg masses are located at points in the xy plane as shown in the figure. Use this exhibit to answer the following question(s). -Refer to Exhibit 13-1.What is the magnitude of the resultant force (caused by the other two masses)on the mass at the origin?

An electron in a hydrogen atom makes a transition from the n = 4 to the n = 3 energy state.Determine the energy (in eV)of the emitted photon.

A projectile is launched from the surface of a planet (mass = M,radius = R).What minimum launch speed is required if the projectile is to rise to a height of 2R above the surface of the planet? Disregard any dissipative effects of the atmosphere.

A spacecraft (mass = m)orbits a planet (mass = M)in a circular orbit (radius = R).What is the minimum energy required to send this spacecraft to a distant point in space where the gravitational force on the spacecraft by the planet is negligible?

Suppose a beam of electrons is incident on a collection of hydrogen atoms,all of which are in the lowest energy state (n = 1).What is the minimum energy the electrons can have if they are to excite the hydrogen atoms into the n = 2 state?

What wavelength (in μ\muμ m)is associated with the Paschen series for n = 4? (RH = 1.097*107 m - 1)

What is the difference in wavelength for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097 *107 m - 1. )

A satellite is placed in a geosynchronous orbit.In this equatorial orbit with a period of 24 hours,the satellite hovers over one point on the equator.Which statement is true for a satellite in such an orbit?

The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse.When the planet is at point A,

The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse.When the planet is at point A,

A Li2+ ion undergoes a transition from the n = 4 to the n = 3 state.The energy of the emitted photon is

Three galaxies,each of mass M = 4.0 *1041 kg,lie in a plane at the corners of an equilateral triangle with sides of 5.0 * 1022 m length.The magnitude of the force the other two galaxies exert on each galaxy is

Introduction and Vectors

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Motion in Two Dimensions

The Laws of Motion

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Energy of a System

Conservation of Energy

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Relativity

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Energy in Thermal Processes: the First Law of Thermodynamics

Heat Engines,entropy,and the Second Law of Thermodynamics

Electric Forces and Electric Fields

Electric Potential and Capacitance

Current and Direct Current Circuits

Magnetic Forces and Magnetic Fields

Faradays Law and Inductance

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Reflection and Refraction of Light

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Filters

What is the gravitational force on a 20-kg satellite circling the Earth (radius = 6.4* 10⁶ m,mass = 6.0 * 10²⁴ kg)with a period of 5.0 h?

What is the kinetic energy of a 200-kg satellite as it follows a circular orbit of radius 8.0 10⁶ m around the Earth? (Mass of Earth = 6.0 10²⁴ kg. )

Calculate the Earth's angular momentum in the approximation that treats the Earth's orbit around the sun as a circle.(M_Sun = 1.99 10³⁰ kg;T = 3.156 10⁷ s;M_E = 5.98 * 10²⁴ kg. )

What wavelength (in $\mu$ m)is associated with the Paschen series for n = 4? (R_H = 1.097*10⁷ m ^- ¹)

What is the difference in wavelength for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (R_H = 1.097 *10⁷ m ^- ¹. )

A Li²⁺ ion undergoes a transition from the n = 4 to the n = 3 state.The energy of the emitted photon is

Three galaxies,each of mass M = 4.0 10⁴¹ kg,lie in a plane at the corners of an equilateral triangle with sides of 5.0 10²² m length.The magnitude of the force the other two galaxies exert on each galaxy is