How many complete wavelengths are present in the

sound wave shown?

1

2

3

4

5

6

16. The spreading of sound waves around openings in barriers is called A. reverberation. B. an echo. C. diffraction. D. refraction.

Why is gravitational potential energy negative?

The local news team is tracking the storm and has reported that it is traveling north, northwest at 20 miles per hour. The reporter has told us the storm's acceleration. average speed. velocity. instantaneous speed.

The car A has a weight of 4000 lb and is traveling to the right at 3 ft/s. Meanwhile a 2000 lb car B is traveling at 6 ft/s to the left.

Use the formula h = - 16t2 + v0t. (if an answer does not exist, enter dne.) a ball is thrown straight upward at an initial speed of v0 = 56 ft/s. (a) when does the ball initially reach a height of 40 ft?

For a constant voltage, increasing the resistance will cause the current to decrease. true or false

Which of the following is an example of a testable scientific hypothesis? A) Why do plants grow better in the Sun than in the shade? B) Peacocks have prettier tail feathers than pigeons do.

A passenger jet flies from one airport to another 1,273 miles away in 2.2 h. find its average speed.

Wich statement best describe why an island food web could be considered a closed system

If two identical wires carrying a certain current in the same direction are placed parallel to each other, they will experience a force of repulsion. True / False.