A spring has a spring constant of 55 N/m. How much energy is stored in the spring when it is compressed 0.3 m past it's natural length?

What is meant by the expression action at a distance? (physics)

Use the equation from week 3: f r e q u e n c y = w a v e s p e e d w a v e l e n g t h and the wavelength you found in #3 to calculate the frequency of this photon (remember the speed of light is 3E8 m/s) :

A magnetically soft material is placed in a strong magnetic field. What is the most likely outcome? a. It will become a permanent magnet because the domains will remain aligned. b.

For an object to be in projectile motion, what force must be acting on it

Which of the following statements correctly describes a difference between biomass-fired power plants and traditional fossil-fuel-burning power plants, such as coal-fired plants?

A football travels 25 m in 2.5 seconds. What is the speed of the football?

A 25 kg ball is thrown into the air when thrown it's going 10 m/s calculate how high it travels

As part of a circus performance, a man is attempting to throw a dart into an apple which is dropped from an overhead platform. Upon release of the apple, the man has a reflex delay of 215 milliseconds before throwing the dart.

A train travels 90 kilometers in 1 hour, and then 82 kilometers in 5 hours. What is it's average speed?

3. A hydraulic lift is used to jack a 950-kg car 45 cm off the floor. The diameter of the output piston is 23 cm, and the input force is 375 N. a. What is the area of the input piston? (10pts) b.