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

How does energy transfer in gas-powered car begging with the battery

Julie drives 100 mi to Grandmother's house. on the way to grandmothers h's Julie drives half the distance at 40 mph and half the distance at 60 mph. On her return trip, she drives half the time at 40 mph and half the time at 60 mph.

A noisy toy is placed in a glass jar. All the air is then slowly removed from the jar. How does this affect the sound you hear? The sound of the toy increases until it reaches its maximum. The sound of the toy decreases and then stops.

Human resource professionals are reviewing the needs of a company that is building a new factory. The company needs people who can weld electronic elements together, test them, and package them securely.

An echocardiogram uses 4.4 mhz ultrasound to measure blood flow in the aorta. the blood is moving away from the probe at 1.5 m/s.

Is a light bulb considered construction

Witch statement about polymers is true

Which safety measures should you follow during a thunderstorm? Check all that apply. (A) Avoid touching anything that conducts electricity. (B) Avoid touching a person who has been struck by lightning. (C) Go outside.

1. An automobile with a mass of 1000 kg accelerates when the traffic light turns green. If the net force on the car is 4000 N, what is the car's acceleration?

Imagine that you replace the block in the video with a happy or sad ball identical to the one used as a pendulum, so that the sad ball strikes a sad ball and the happy ball strikes a happy ball.