What is the speed of sound in dry air if the temperature is 46°C?

A. 300 meters/second

B. 320 meters/second

C. 338 meters/second

D. 359 meters/second

E. 400 meters/second

Does the Ozone layer affect our health

A torch bulb is rated 2.5V and 750mA. Calculate its power, its resistance and the energy consumed if this bulb lighted for 4 hours

A little girl is going on the merry-go-round for the first time, and wants her 51 kg mother to stand next to her on the ride, 2.7 m from the merry-go-round's center. Part A If her mother's speed is 5.

The Earth rotates toward the east. True False

What are some things cyclists do to reduce friction?

How long did the astronauts stay on the moon?

Brenda is standing on the beach; the sea is choppy. she observes that the crests of distant waves appear not only smaller, but also closer together than do the crests of waves nearer the beach. this example illustrates a depth cue known as:

If two waves in the same space interfere completely destructively, which of the following occurs? A. The amplitude decreases. B. The amplitude increases. C. The wave speed increases. D. The wave speed decreases.

An electric force exists between which pair of objects? Check all that apply. A) a neutral object and a negative object two negative objects B) a neutral object and a positive object C) two positive objects D) a negative object and a positive object

A person jogs 40 km in 32 minutes then 20 km in 22 minutes and finally 10 km in 16 minutes what is his average speed in in per minute