A 750 Watt hairdryer is used for 15 minutes. Calculate the Kwhr used.

You have a rock with a volume of 15 cm 3 and a mass of 45 grams. What is its density?

Suppose you want to make a nested function call (i. e. a call to a function from inside of another function) using a jal rather than a call for performance reasons.

Which substance is used to remove rust from metal? A: lye (NaOH) B: hydrochloric acid (HCl) C: ammonia (NH3) D: sulfuric acid (H2SO4)

Water molecules are made of slightly positively charged hydrogen atoms and slightly negatively charged oxygen atoms. Which force keeps water molecules stuck to one another? strong nuclear gravitational weak nuclear electromagnetic

An apple is placed on a kitchen counter. How could the movement of the particles in the apple be decreased? A. Put it in the refrigerator B. Eat it for dinner C. Put it in the microwave D. Put it in the sunlight.

Which of the outer planets are most like Earth? How?

The pressure inside a champagne bottle can be quite high and can launch a cork explosively. Suppose you open a bottle at sea level. The absolute pressure inside a champagne bottle is 6 times atmospheric pressure; the cork has a mass of 7.

Using a cathode ray tube, Thomson confirmed that atoms must have an overall positive charge. atoms are made of particles that have a negative charge. electrons in atoms must have varying amounts of energy. electrons are only found in the nucleus.

A ball is rolled along the inside of a partial hoop lying flat on a table. which path will the ball follow when it gets to the end of the hoop?

What pattern of material movement found in the Earth system tracks how an element moves from living to nonliving parts? a. rock cycle b. calcium cycle c. carbon cycle d. none of the above