A rock is dropped into the Grand Canyon. It takes 18 seconds to hit the bottom. Calculate how deep the canyon is.

Which of the following is true about grasslands? a. They have numerous trees. b. They have a large number of tree-dwelling birds. c. They experience a wide temperature range over two seasons. d. They have four distinct seasons.

What causes light traveling in a straight line to bend? A traveling through a dense liquid B moving toward a solid object C traveling through a uniform medium D moving through the boundary of a new medium

The way a rock reflects light is called the rock's A. streak O B. luster O C. cleavage D. specific gravity

Watt which is a unit of power is equal to

N which one of the following locations can a person hear the echo of a sound?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.

According to Newton's second law of motion acceleration or an object depends upon the ___ of the object and the ___ Acting on it. I'm confused on what the blanks are. I can't find them.

What is the concentration of H + ions at a pH = 7?

Suppose that Paul D. Trigger fires a bullet from a gun. Will the speed of the bullet leaving the muzzle will be the same as the speed of the recoiling gun? Explain.

A certain rock contains large jagged pieces of other rocks cemented by fine particles what type of rock is this explain