Many extrusive volcanic rocks contain holes which have formed from:

acidic reactions

escaping gases

quartz crystals

underwater eruptions

How would the absence of gravity affect the formation of planets? (A) The rocks and debris would take longer to accrete into a planet. (B) The rocks and debris would never accrete into a planet.

How much work can a 22kw car engine do in 60 seconds

As in the video, we apply a charge + to the half-shell that carries the electroscope. This time, we also apply a charge - to the other half-shell.

Which two terrestrial planets have atmospheres with similar compositions? a. mars and venus b. venus and mercury c. mars and mercury d. earth and venus

Name three devices or inventions which are designed to increase friction.

An olympic hurdler accelerates at a rate of 15.5 m/s2. what is the rate in miles/min2?

What is the conservation of energy?

What data are needed to calculate the actual mechanical advantage of a machine

What antenna length should be used to create a dipole antenna that emits 100-mhz electromagnetic waves, a frequency typical of fm radio broadcasts?

If a motor lifts a 400.-kilogram mass a vertical distance of 10. meters in 8.0 seconds, the minimum power generated by the motor is (1) 3.2 * 10^2 W (3) 4.9 * 10^3 W (2) 5.0 * 10^2 W (4) 3.2 * 10^4 W