Many extrusive volcanic rocks contain holes which have formed from:

acidic reactions

escaping gases

quartz crystals

underwater eruptions

Suppose you push horizontally with precisely enough force to make the block start to move, and you continue to apply the same amount of force even after it starts moving. Find the acceleration a of the block after it begins to move.

What is the difference between systolic and diastolic pressure?

The moon orbits a. Earth. c. Saturn. b. the sun. d. Mercury.

Light is observed to have a frequency of 1.5x10^14 Hz. What is the wavelength of this light? a. 2 m b. 500 nm c. 5m d. 2,000 nm

What color dose red cabbage jusice turn into when its mixed with white vinegar

Ganymede is one of the many moons of jupiter. it is nearly a sperical in shape. it is larger than the planet mercury and slightly smaller than the planet mars.

Which of the following statements about two carts rolling on a track and experiencing a completely inelastic collision is TRUE? a. The kinetic energy of the system is conserved to good approximation. b.

If element X has 17 protons, how many electrons does it have?

A 2.0-kilogram laboratory cart is sliding across a horizontal frictionless surface at a constant velocity of 4.0 meters per second east. What will be the cart's velocity after a 6.0-newton westward force acts on it for 2.

A boat floats with 25% of its volume under water. a. What is the boatâs density? b. If the boat was made from 500 kg of metal, what is the volume of the boat? (Assume the air in the boat has negligible mass and density) c.