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PHY 1301 Final Exam with Answers

1. Which one of the following quantities is a vector quantity?
2. Which of the following describes the difference between speed and velocity?
3. If the mass of a vehicle is 1000 kg, what is the weight of the vehicle on Earth? The acceleration due to gravity on Earth is 9.8 m/s2 .
4. Which one of the following forces is not considered a fundamental force?
5. The initial kinetic energy in a system was 0 J, and the initial potential energy was 2500 J. If the final kinetic energy is measured as 2500 J, what is the final potential energy of the system? Ignore frictions.
6. A satellite orbits the Earth in a uniform circular motion. What is the direction of the centripetal acceleration of the satellite?
7. A girl exerts an average force of 50 N on a toy cart for 0.5 seconds. What is the impulse?
8. A boy exerts an average force of 100 N on a toy cart for 0.7 seconds. What is the impulse?
9. A spring has a spring constant of 10 N / m. Find the magnitude of the force needed to compress the spring by 0.1 m.
10. A spring has a spring constant of 100 N / m. Find the magnitude of the force needed to compress the spring by 0.1 m
11. Which one of the following is the coldest temperature?
12. The mass of a cube is 270 kg, and the length of the side of the cube is 3 meters. What is the mass density of the cube?
13. Which one of the following is not a correct description of ideal gas law?
14. Which one of the following is not a correct description of Stefan-Boltzmann’s law?
15. Which one of the following variables is the best indicator of thermal equilibrium between two systems in thermal contact?
16. Consider an isothermal expansion of an ideal gas. If the work done by the monatomic gas is given as 3000 J, what is the heat supplied to the gas? Your response must be at least 75 words in length and should include any equations that are needed to answer the problem.
17. 3000 J of heat flows spontaneously through a metal rod from a hot reservoir at 500 K to a cold reservoir at 300 K. What is the entropy gained by the cold reservoir? Your response must be at least 75 words in length and should include any equations that are needed to answer the problem.