A student is standing 8 m from a roaring truck engine that is measured at 20 dB. The student moves 4 m closer to

the engine. What is the measured sound intensity at the new distance?

dB

What do all electromagnetic waves have in common? They have the same amplitude. They have the same frequency. They have the same wavelength. They have the same speed.

Acceleration changes and objects ... a. inertia speed or both b. speed gravity or both c. gravity direction or both d. speed direction or both

When two or more different capacitors are connected in parallel across a potential source (battery), which of the following statements must be true? (There could be more than one correct choice.

What equation is used to calculate the weight of an object on a plant?

A student stays at her initial position for a bit of time, then walks slowly in a straight line for a while, then stops to rest awhile and finally runs quickly back to her initial position along a straight line.

If you get into a completely filled buthtub and you weigh 100 lbs, how much water will overflow? why?

A commercial jet flies at 550mi/hr for 3000mi. For how much time does the jet fly?

If almost any system in stable equilibrium is slightly disturbed, it will then exhibit simple harmonic motion because 1. the change in potential energy is proportional to the cube of the displacement from the equilibrium position. 2.

Is the following statement true or false? Nuclear fission occurs naturally in stars.

Why is it useful to calculate average speed?