A material that does not allow the movement of electrical charges is known as

a. an insulator. b a conductor

c. an eletrofabric

d. static electricity

Write a sentence explaining how tempature changes with altitude

What is the relative size and composition of the universe, a galaxy, and a solar system? Is the universe endless?

Light of wavelength 633 nm from a distant source is incident on a slit 0.750 mm wide, and the resulting diffraction pattern is observed on a screen 3.50 m away.

Dave's 8 kg bowling ball headed towards the pins with a momentum of 192 kg m/s. What was the velocity of the ball?

How much energy from the sun actually reaches the corn answer?

A night lamp uses a 30 W bulb. If it is left on continuously for 8 hours, how much energy will it use?

If a drag racer wins the final round of her race by going an average speed of 92.5 m/s in 4.5 seconds, what distance did she cover

An airplane flies due west (i. e. in the-X direction) between two airports. For one-quarter of the distance it travels at 650.0 km/h and the rest at 750.0 km/h. What is the average velocity (not speed) of the airplane?

1. The "Opportunity" rover that just landed on Mars transmitted music back to Earth. If the distance to Earth at the time was 9x107 km and radio waves (a kind of "light") travel with a speed of 3x108 m/s, how long did it take for the signal to reach

Precipitation is most likely occurring at A because it is located A. On a cold ocean surface B. On a warm land surface C. Near the cold front D. Near the warm front