Gamma rays have more energy than x-rays. what else is true about gamma rays? a. they have a longer wavelength than x-rays b. they have a higher speed than x-rays. d. they have a higher frequency than x-rays. c. they have a lower frequency than x-rays.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.