james swims at a speed of 2 m/s when she notices a shark is behind her and accelerates so that she is skimming at 4 m/s. if her average acceleration is 1.2 m/s how long did it take for james to speed up

Two identical billiard balls are rolling toward each other at the same speed. What will be true after they collide head-on?

Why is a spring tide so much higher than a normal high tide? A. because the Sun is aligned with the moon B. because the moon is aligned with Earth C. because the moon is directly over the north pole D. because the Sun is directly over the north pole

If you're driving towards the sun late in the afternoon, you can reduce the glare from the road by wearing sunglasses that permit only the passage of light that's A. polarized in a vertical plane. B. polarized in a horizontal plane. C.

Unlike a transverse wave, the disturbance in a longitudinal wave is A) in the opposite direction of the wave motion. B) in a circular motion. C) perpendicular to the wave motion D) parallel to the wave motion.

Which subatomic particles each have a positive electrical charge? a. protons b. neutrons c. electrons

Photons travel outward from a light bulb in

The critical angle for a beam of light passing from water into air is 48.8°. this means that all light rays with an angle of incidence in the water that is greater than 48.8° will be

A basketball is filled with air and has a small hole. Explain why the basketball would leak.

Aligned magnetic domains are only present in which of the following? A) permanent magnets B) temporary magnets C) all magnetic material D) depends on the situation

How are magnetic poles and electrical charges similar