if it takes a tennis ball falls straight down for 4 seconds from the top of a roof, how high above the ground is the roof?

Many studies on the homeless count the number of people who use what? A. Public restrooms B. Section 8 vouchers C. Homeless shelters D. Campgrounds

Two clear, colorless liquids are poured together. A bright yellow solid forms. What physical properties have changed?

What is the latitude and longitude of Washington D. C.

Which measurement below has three significant figures? A. 12,300 lbs B. 12.02 m C. 0.2004 g D. 0.018 km

A 30.9 kg rocket has an engine that creates a 790 N upward force ("thrust"). What is its acceleration? (Don't forget its weight!) (Unit = m/s)

A 770 n man stands in the middle of a frozen pond of radius 10.0 m. he is unable to get to the other side because of a lack of friction between his shoes and the ice. to overcome this difficulty, he throws his 1.

Which equation represents the total energy of a system?

The weight of a 100 N laser printer is spread over 0.5m2. What is the pressure it exerts? A) 50 N/m2 B) 200 N/m2 C) 500 N/m2

Comparing and contrasting ionic and covalent bonds?

Elevation above sea level is called