Which of the following is a possible explanation for a set of observations or answer to a scientific question?

A. prediction

B. hypothesis

C. variable

D. law

?

During any process, the net electric charge of an isolated system does not change.

Do acids or bases turn litmus paper red?

The distance between slits on a diffraction grating is 0.60 mm, and one of the angles of diffraction is 0.30°. The light forms a second-order bright band. How large is the path difference? 1047 nm 1571 nm 3142 nm 6284 nm

Characteristics of Sound Wave.

You and your family are driving to your grandparents' house, which is 185 km away. If you drive at an average speed of 95 km/h, how long will it take you to get there?

What is the mechanical advantage of a pulley?

What kind of movement does the heat within the core and mantle directly generate?

Explain why Newton's first law of motion can be difficult to observe in moving objects?

No force is necessary to

A boat has a mass of 4040 kg. Its engines generate a drive force of 4660 N due west, while the wind exerts a force of 880 N due east and the water exerts a resistive force of 1400 N due east. Take west to be the positive direction.