A student investigated the different types of collisions using dynamic cars in the laboratory. Which best describes the collision for the data?

• Elastic
• Inelastic
• Neither elastic nor inelastic
• Insufficient information

Tags

NGSS.HS-PS2-2

As shown below, two 100 kg astronauts are floating in space. The first astronaut is moving at 4 m/s while the second is at rest. The two astronauts collide. Both astronauts are now moving at 2 m/s. Based on the information and images, which of the following statements is true?

• Momentum and kinetic energy are both conserved.
• Momentum is conserved but kinetic energy is not conserved.
• Kinetic energy is conserved but momentum is not conserved.
• Neither momentum nor kinetic energy is conserved.

Tags

NGSS.HS-PS2-2

Two basketballs of equal mass collide in midair. If the initial velocity of Basketball A was to the right at 2.5 m/s and the initial velocity of Basketball B was to the left at 1.7m/s, what is the final velocity of Basketball A if the collision is perfectly elastic?

• 1.7 m/s to the left
• 1.7 m/s to the right
• 2.5 m/s to the left
• 2.5 m/s to the right

Tags

NGSS.HS-PS2-2

The law of conservation of momentum states that the total momentum of an isolated system?

• always adds to zero even as objects in the system collide
• only changes when objects in the system collide
• only changes when objects in the system collide inelastically
• remains constant even as objects in the system collide

Tags

NGSS.HS-PS2-2

Which of the following has the least momentum?

• .01 kg mass moving at 200 m/s
• 1 kg mass moving at 35 m/s
• 100 kg mass moving at 3 m/s
• 2,000 kg mass moving at 0.1 m/s

Tags

NGSS.HS-PS2-2

A student that just received their driver’s license decides to buy a new car. He remembers from physics class that heat engines have a thermal efficiency that can be calculated. He asks the car dealer for a car that has a high thermal efficiency rating. The car dealer says he has a car that is 100% efficient. Which law of thermodynamics best describes why the car cannot be 100% efficient?

• The zeroth law of thermodynamics
• The first law of thermodynamics
• The second law of thermodynamics
• The third law of thermodynamics

Tags

NGSS.HS-PS3-4

A student is preparing to take a bath when she realizes the hot water tap in the bathroom is not working. The student goes to the kitchen and prepares 10 L of 100°C water to mix with 90 L of 10°C water. What will be the final temperature of the bath water?

• −1.25°C
• 19°C
• 55°C
• 110°C

Tags

NGSS.HS-PS3-4

A student is investigating the relationship between pressure, temperature, and entropy. A student manages to obtain a sample of ice, water, and water vapor that all coexist at the same temperature called the triple point. Which will have the greatest entropy at the triple point?

• Solid
• Liquid
• Gas
• The entropy will be equal in all states

A student is cooking an egg in a pan on a stovetop. What is the main method of heat transfer between the pan and the egg?

• Conduction
• Convection
• Entropy
• Radiation

Which of the following would be the best example of non-damped simple harmonic motion?

• A mass oscillating vertically on an ideal spring
• Sound waves traveling through water
• A satellite orbiting a planet
• An ideal bouncy-ball repeatedly bouncing