14. A 25.0 kg rock is lifted from the ground to a height of 10 m, in a time of 5.0 s. A) What is the force necessary to lift the rock? B) What is the amount of work done? C) What is power
performed?

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force

The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656(red) and 486 (blue). light from a hydrogen lamp illuminates a diffraction grating with 500 lines per mm, and the light is observed on a screen 1.50 behind the grating. what is the distance between the first-order red and blue fringes?