When a mass of 2.5 x 10^2 kg is attached to a certain spring and set in motion it makes 20 complete cycles in 4.0 s. What is the spring constant of the spring?

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)