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Questions in physics

📝 Answered - Describe how Galileo might design an experiment to determine if the mass of a pendulum bob affects the period of its swing.

📝 Answered - Explain why the current is reduced as electrons move through a conductor.

📝 Answered - True or false? Three common voltage sources are batteries, solar cells, and generators.

📝 Answered - Why does a pendulum eventually stop swinging?

📝 Answered - An oscillator makes four vibrations in one second. What are its period and frequency?

📝 Answered - A quarter is 2.4 millimeters thick. How tall are the following stacks of quarters? a. A stack worth 50 cents b. A stack worth $1 c. A stack worth $5 d. A stack worth $1,000 (Give your answer in millimeters and meters.)

📝 Answered - A car travels from point A to point B in four hours, and then from point B back to point A in six hours. The road between point A and point B is perfectly straight, and the distance between the two points is 240 km. What is the car’s average velocity?

📝 Answered - A ski jumper competing for an Olympic gold medal wants to jump a horizontal distance of 135 meters. The takeoff point of the ski jump is at a height of 25 meters. With what horizontal speed must he leave the jump? a. What do you know? b. What do you need to solve for? c. What equation(s) will you use? d. What is the solution to this problem?

📝 Answered - The Earth has a radius of 6,400 kilometers. A satellite orbits the Earth at a distance of 12,800 kilometers from the center of the Earth. If the weight of the satellite on Earth is 100 kilonewtons, what is the gravitational force on the satellite in orbit?

📝 Answered - An ant sits on the back of a mouse. The mouse carries the ant across the floor for a distance of 10 meters. Was there work done by the mouse? Explain.