A child pulls a sled up a snow-covered hill. The child does 405 J of work on the sled. If the child walks 15 m up the hill, how large of a force must the child exert?

An igneous rock that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals has a composition that is

5. How many significant figures are in the measurement + 0.500 mg? two three four five

6) A cheetah can run at a speed up to 112 km/hr. How fast is this in m/s? If he runs for 4.5 seconds, how far will he run (in m) ? (hint: you need to solve with 2 different setups)

In an isolated system: O A. total (PE + KE) is unchanged. KE remains the same. O c. matter flows in and out. PE remains the same.

Exit How many grams are in a mole of hydrogen chloride (HCl) ? 1 H 1.01 Hydrogen 17 Cl 35.45 Chlorine

A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have? 13 9 5 4

Calculate the maximum mass of carbon dioxide that could be obtained by adding excess hydrochloric acid to 15 g of calcium carbonate.

True or false: during dry weather, the water level in a small pond drops because of runoff.

Bradley hit a baseball with a bat. The baseball then hit a window and caused the window to break. Where did the energy that broke the window come from?

An observation which requieres measuresment is called