Why do sound waves do not travel in empty space?

a. because sound waves do not need matter to travel.

b. because sound waves need matter to travel.

c. because sound waves need vacuum to travel.

d. none of the above

You are caught on open water during a thunderstorm. what should you do?

A 1060-kg car moving west at 16 m/s collides with and locks onto a 1830-kg stationary car. determine the velocity of the cars just after the collision.

Where does competition for reproduction most likely to occur

Which statement about stars is correct? F Star formation begins in a nebula. G White dwarfs become main-sequence stars when they gain mass. H Supergiants are stars that can absorb black holes. J Main-sequence stars are formed by comets.

Is Salad dressing a compound?

How would you explain photosynthesis to a new student in class

If the abosolute of a gas is 600 k, the temperature in degrees Celsius is

How does an electromagnetic wave propagate itself? a. A changing magnetic field induces an electric field perpendicular to the magnetic field. b. A changing electric field induces a magnetic field perpendicular to the electric field. c.

Which of the following is an example of convection? A. hot air rising and cooler air falling B. a hot object transferring heat to a cooler one C. a hot oven warming the air around it D. the rays of the Sun warming the earth

A 50,000 kg locomotive is traveling at 10 m/s when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop? Assume the track is level.