Which of the following is the closest estimate of the number of galaxies present in the universe?

One hundred

Ten thousand

Ten million

One hundred billion

Describe the arrangement of the sun moon and earth during a solar eclipse and a lunar eclipse

Which of the following is most likely to have a volume of 75 cm³? A. a stereo system B. a laptop computer C. a portable mp3 player D. a plasma screen television

Which happens during the day at the beach? A. The water is warmer than the land, and air sinks over the water B. The water is cooler than the land, and air sinks over the water C. The water is warmer than the land, and air rises over the water D.

Part A Does the number of particles change as the substance changes its state?

Energy is transferred in solids by conduction, which means that? A: Heat travels in both directions B: Heat travels from the cooler object to the hotter object C:Heat travels from the hotter object to the cooler object D: Heat does not travel

Emission of light from an atom occurs when an electron

Which is an example of transfroming potential energy to kinetic

Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that's above the ball.

Choose The units of 1/4πε0 are: A. N2C2 B. N • m/C C. N2 • m2/C2 D. N • m2/C2 E. m2/C2

What does a fern ultimately depend on as an energy source?