What is the name of the line drawn perpendicular to the surface where a light ray strikes?

a. incoming ray

c. normal

b. reflected ray

d. vertical

A quartz crystal vibrates with a frequency of 35,621 Hz. What is the period of the crystal's motion?

At 25°c three moles of gas occupy a volume of 4.0L at 1.9 kpa. if the volume increases to 8.0L what will the new pressure be

A particle moves along the x-axis with velocity given by v (t) = 3t2+6t for time tâ¥0. If the particle at position x=2 at time t=0, what is the position of the particle at time t=1? a) 4 b) 6 c) 0 d) 11 e) 12

As the electrical energy of lightning is discharged into the air, a. the air cools and condenses rapidly. c. the air cools and expands rapidly. b. the air heats and condenses rapidly. d. the air heats and expands rapidly.

Find the least common multiple of x2 - 4x - 5 and x2 - 3x - 10. A. (x + 1) (x - 2) (x - 5) B. (x - 1) (x - 5) (x - 2) c. (x + 1) (x - 5) (x + 2) d. (x - 5) (x + 2) (x - 1)

What two pieces of data indicates that uranus resides in the outer layer of the solar system.

What is acceleration? a. change in velocity/change in time b. change in distance/change in time c. change in mass/change in volume d. change in pressure/change in time

Brittany stands at rest on a skateboard. the combined mass of brittany and the skateboard is 62 kg. dave tosses a 3.7-kg pumpkin to brittany, and when she catches it, she and the skateboard begin to roll backward with a speed of 0.16 m/s.

The maximum restoring force that can be applied to the disk without breaking it is 40000 n. what is the maximum oscillation amplitude that won't rupture the disk

Which is a vector quantity speed or velocity