The multiple reflection of a single sound wave is a/an

A. echo.

B. diffraction.

C. reverberation.

D. refraction

What electrons live in 2,8,8 ...

A toy car has an initial acceleration of 2 m/s" across a horizontal surface after it is released from rest.

Which type of make sure looks like it is one substance A. A heterogeneous one B. A suspension C. A colloid D. A homogeneous one

Describe how the Fermi level changes with donor level, temperature and contact with p and n type semiconductors

Why is it important to understand your strength and weakness

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.