One of the first atomic explosion released approximately 1.0 × 1014 J of energy.How much matter had to be changed into energy to produce this yield? (c = 3.0 × 108 m/s)

A) 1.1 g B) 23 g C) 13 g D) 0.45 kg E) 1.1 kg A) 1.1 g B) 23 g C) 13 g D) 0.45 kg E) 1.1 kg

Exam 29: Relativity

A spaceship,traveling at 0.100c away from a stationary space platform,launches a secondary rocket towards the station,with a speed of 0.560c relative to the spaceship.What is the speed of the secondary rocket relative to the space platform?

(Multiple Choice)

4.8/5

(86)

Question 61

Two satellites with equal rest masses of 100 kg are traveling toward each other in deep space.They have identical speeds of 0.600c.The satellites collide and somehow manage to stick together.What is the rest mass of the combined object after the collision?

(Multiple Choice)

4.8/5

(71)

Question 62

A satellite,initially at rest in deep space,separates into two pieces,which move away from each other.One piece has a rest mass of 190 kg and moves away with a speed 0.500c,and the second piece has a rest mass of 250 kg and moves in the opposite direction.What is the speed of the second piece?

(Multiple Choice)

5.0/5

(96)

Question 63

Two spaceships,each 100 m long in its own rest frame,approach Earth from opposite directions,each with a speed 0.50c relative to Earth.As measured by a passenger in one of the spaceships,how long is the other spaceship?

(Multiple Choice)

4.8/5

(80)

Question 64

According to the equation E = mc²,an object turns into energy when it reaches the speed of light.

(True/False)

5.0/5

(80)

Question 65

How much energy would be required to accelerate a 77-kg professor from rest to 90% the speed of light? (c = 3.0 × 10⁸ m/s)

(Multiple Choice)

4.8/5

(95)

Question 66

One of the first atomic explosion released approximately 1.0 × 10¹⁴ J of energy.How much matter had to be changed into energy to produce this yield? (c = 3.0 × 10⁸ m/s)

(Multiple Choice)

4.9/5

(71)

Question 67

A satellite with a rest mass of 200 kg and a speed of 0.800c and a second satellite with a rest mass of 100 kg and a speed of 0.600c are traveling toward each other in deep space.The satellites collide and somehow manage to stick together.What is the speed of the combined object after the collision?

(Multiple Choice)

4.8/5

(83)

Question 68

What is the total energy of an electron moving with a speed of 0.950c? (c = 3.0 × 10⁸ m/s,m_el = 9.11 × 10^-31 kg)

(Multiple Choice)

4.9/5

(67)

Question 69

Observer A sees a pendulum oscillating back and forth in a relativistic rocket and measures its period to be T_A.Observer B moves along with the rocket and measures the period of the pendulum to be T_B.What is true about these two time measurements?

(Multiple Choice)

4.8/5

(87)

Question 70

Someone in Earth's rest frame says that a spaceship's trip between two planets took 10.0 y,while an astronaut on the space ship says that the trip took What is the speed of the spaceship,assuming the planets are at essentially at rest?

(Multiple Choice)

4.9/5

(73)

Question 71

A spaceship with a constant speed of 0.800c relative to Earth travels to a star that is 4.30 light-years from Earth.How much time for this trip would elapse on a clock on Earth?

(Multiple Choice)

5.0/5

(84)

Question 72

What is the momentum of a proton when it is moving with a speed of 0.60c? (m_proton = 1.67 × 10^-27 kg)

(Multiple Choice)

4.8/5

(83)

Question 73

As measured in Earth's rest frame,a spaceship traveling at 0.9640c takes To travel between two planets that are not moving relative to each other.How long does the trip take as measured by someone on the spaceship?

(Multiple Choice)

4.9/5

(66)

Question 74

The relativistic kinetic energy formula is valid

(Multiple Choice)

4.8/5

(73)

Question 75

Two stars are at rest relative to each other.In their common rest frame,these stars are 90.0 light-years apart.If they are measured to be Apart by the navigator of a spaceship traveling between them,how fast is the spaceship moving relative to these stars?

(Multiple Choice)

4.8/5

(67)

Question 76

Three spaceships A,B,and C are in motion as shown in the figure.The commander on ship B observes ship C approaching with a relative velocity of 0.82c.The commander also observes ship A,advancing in the rear,with a relative velocity of 0.50c.What is the speed of ship C as measured by the captain of ship A?

(Multiple Choice)

4.9/5

(76)

Question 77

If,instead of the correct formula for kinetic energy,we carelessly use the classical expression for kinetic energy for a particle moving at half the speed of light,by what magnitude percent will our calculation be in error? (c = 3.0 × 10⁸ m/s)

(Multiple Choice)

4.9/5

(81)

Question 78

One 20-year-old twin brother takes a space trip with a speed of 0.80c for 30 years according to a clock on his spaceship.At the end of this trip,what are (a)his own age and (b)the age of his Earth-based twin brother?

(Multiple Choice)

4.9/5

(86)

Question 79

A spaceship approaches Earth with a speed 0.50c.A passenger in the spaceship measures his heartbeat as 70 beats per minute.What is his heartbeat rate according to an observer that is at rest relative to Earth?

(Multiple Choice)

4.8/5

(89)

Question 80

Showing 61 - 80 of 98

Exam 29: Relativity

A spaceship,traveling at 0.100c away from a stationary space platform,launches a secondary rocket towards the station,with a speed of 0.560c relative to the spaceship.What is the speed of the secondary rocket relative to the space platform?

Two satellites with equal rest masses of 100 kg are traveling toward each other in deep space.They have identical speeds of 0.600c.The satellites collide and somehow manage to stick together.What is the rest mass of the combined object after the collision?

A satellite,initially at rest in deep space,separates into two pieces,which move away from each other.One piece has a rest mass of 190 kg and moves away with a speed 0.500c,and the second piece has a rest mass of 250 kg and moves in the opposite direction.What is the speed of the second piece?

Two spaceships,each 100 m long in its own rest frame,approach Earth from opposite directions,each with a speed 0.50c relative to Earth.As measured by a passenger in one of the spaceships,how long is the other spaceship?

According to the equation E = mc2,an object turns into energy when it reaches the speed of light.

How much energy would be required to accelerate a 77-kg professor from rest to 90% the speed of light? (c = 3.0 × 108 m/s)

One of the first atomic explosion released approximately 1.0 × 1014 J of energy.How much matter had to be changed into energy to produce this yield? (c = 3.0 × 108 m/s)

What is the total energy of an electron moving with a speed of 0.950c? (c = 3.0 × 108 m/s,mel = 9.11 × 10-31 kg)

Observer A sees a pendulum oscillating back and forth in a relativistic rocket and measures its period to be TA.Observer B moves along with the rocket and measures the period of the pendulum to be TB.What is true about these two time measurements?

Someone in Earth's rest frame says that a spaceship's trip between two planets took 10.0 y,while an astronaut on the space ship says that the trip took What is the speed of the spaceship,assuming the planets are at essentially at rest?

A spaceship with a constant speed of 0.800c relative to Earth travels to a star that is 4.30 light-years from Earth.How much time for this trip would elapse on a clock on Earth?

What is the momentum of a proton when it is moving with a speed of 0.60c? (mproton = 1.67 × 10-27 kg)

As measured in Earth's rest frame,a spaceship traveling at 0.9640c takes To travel between two planets that are not moving relative to each other.How long does the trip take as measured by someone on the spaceship?

The relativistic kinetic energy formula is valid

Two stars are at rest relative to each other.In their common rest frame,these stars are 90.0 light-years apart.If they are measured to be Apart by the navigator of a spaceship traveling between them,how fast is the spaceship moving relative to these stars?

If,instead of the correct formula for kinetic energy,we carelessly use the classical expression for kinetic energy for a particle moving at half the speed of light,by what magnitude percent will our calculation be in error? (c = 3.0 × 108 m/s)

One 20-year-old twin brother takes a space trip with a speed of 0.80c for 30 years according to a clock on his spaceship.At the end of this trip,what are (a)his own age and (b)the age of his Earth-based twin brother?

A spaceship approaches Earth with a speed 0.50c.A passenger in the spaceship measures his heartbeat as 70 beats per minute.What is his heartbeat rate according to an observer that is at rest relative to Earth?

Introduction to Physics

One-Dimensional Kinematics

Vectors in Physics

Two-Dimensional Kinematics

Newtons Laws of Motion

Applications of Newtons Laws

Work and Kinetic Energy

Potential Energy and Conservation of Energy

Linear Momentum and Collisions

Rotational Kinematics and Energy

Rotational Dynamics and Static Equilibrium

Gravity

Oscillations About Equilibrium

Waves and Sound

Fluids

Temperature and Heat

Phases and Phase Changes

The Laws of Thermodynamics

Electric Charges, Forces, and Fields

Electric Potential and Electric

Electric Current and Direct-Current Circuits

Magnetism

Magnetic Flux and Faradays Law of Induction

Alternating-Current Circuits

Electromagnetic Waves

Geometrical Optics

Optical Instruments

Physical Optics: Interference and Diffraction

Quantum Physics

Atomic Physics

Nuclear Physics and Nuclear Radiation

Filters

According to the equation E = mc²,an object turns into energy when it reaches the speed of light.

How much energy would be required to accelerate a 77-kg professor from rest to 90% the speed of light? (c = 3.0 × 10⁸ m/s)

One of the first atomic explosion released approximately 1.0 × 10¹⁴ J of energy.How much matter had to be changed into energy to produce this yield? (c = 3.0 × 10⁸ m/s)

What is the total energy of an electron moving with a speed of 0.950c? (c = 3.0 × 10⁸ m/s,m_el = 9.11 × 10^-31 kg)

Observer A sees a pendulum oscillating back and forth in a relativistic rocket and measures its period to be T_A.Observer B moves along with the rocket and measures the period of the pendulum to be T_B.What is true about these two time measurements?

What is the momentum of a proton when it is moving with a speed of 0.60c? (m_proton = 1.67 × 10^-27 kg)

If,instead of the correct formula for kinetic energy,we carelessly use the classical expression for kinetic energy for a particle moving at half the speed of light,by what magnitude percent will our calculation be in error? (c = 3.0 × 10⁸ m/s)