Draw a free-force body diagram of all the forces acting on the stopper that is being rotated on the string above one's head in a horizontal circle of a fixed radius.

A train travels 57 kilometers in 3 hours, and then 87 kilometers in 2 hours. What is its average speed? km/hr

How has God designed sound waves so that a person is able to hear all the different instruments in a musical piece at the same time?

The waves used by a microwave oven to cook food have a frequency of 2.45 gigahertz calculate the wavelength of this type of wave'

How do you determine the name of an isotope?

5 Which of the following is a difference between plant cells and animal cells? A. Plant cells have a rigid structure, while animal cells have a more flexible structure. B. Animal cells carry out photosynthesis; plant cells do not. C.

Using 6400 km as the radius of Earth, calculate how high above Earth's surface you would have to be in order to weigh 1/16th of your current weight. Show all work leading to your answer OR describe your solution using 3 - 4 complete sentences.

Which of these could occur if a switch is closed? A. A light bulb will light up. B. A hair dryer will turn off. C. A computer will shut down. D. B and C

When you throw a ball the work you do to accelerate it equals the kinetic energy the ball gains?

Old-fashioned heating systems sent steam into radiators in each room of a house. in the radiators, the steam condensed back to water. analyze this process and explain how it heated a room.

If a space ship is traveling with a constant acceleration of 75 m/s^2 and travels for three weeks, how far did it travel and what was it's velocity before it stopped?