Which of the following waves are mechanical?
a. ocean waves
b. light waves
c. radio waves
d. microwaves

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical