Taking the speed of sound in air to be 330 m/s, select the correct frequency of a sound wave with a wavelength of 25 cm:

a. 1320 Hz

b. 990 Hz

c. 355 Hz

d. 8250 Hz

A 2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. Take right to be the positive direction.

Augie created this chart about the two kinds of waves. Which best labels the chart? Title 1 is "Longitudinal Waves," and Title 2 is "Transverse Waves." Title 1 is "Transverse Waves," and Title 2 is "Longitudinal Waves.

A baseball has a mass of 0.145 kilograms, and a bowling ball has a mass of 6.8 kilograms. What is the gravitational force between them if their centers are 0.5 m apart? 1.0 * 10-13 m 1.3 * 10-10 m 2.6 * 10-10 m 1.1 * 10-8 m

What is an intraplate quake? What causes them?

The Great Outdoors 1. What outdoor activities do you prefer? Why? 2. What outdoor activities are you interested in, but have never tried?

A prototype shows if a product meets the required needs. True False

Who discovered black hole radiation?

You catch, tag, and release 50 fish back into a pond. Then, you catch 25 more fish, 5 of which are tagged. What is the best estimate of the number of fish in the pond? A. 100 fish B. 250 fish C. 400 fish D. 625 fish

Which statement correctly describes the differences between positive and negative acceleration? Positive acceleration describes a change in speed; negative acceleration describes no change in speed.

The light-producing element in a fluorescent bulb is the