We recommend that our students get at least hours of behind-the-wheel instruction. A. 6
B. 10
C. 25
D. 50

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.

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

What are similarities and differences between refraction, reflection, diffraction and absorption?