If an airplane undergoes a displace-

ment of 500. km northwest in 1.2 hr,

what is its average velocity?

A balloon filled with helium gas at 20°C occupies 4.91 L at 1.00 atm. The balloon is immersed in liquid nitrogen at - 196°C, while the pressure is raised to 5.20 atm. What is the volume of the balloon in the liquid nitrogen?

A stone is dropped from the roof of a high building. A second stone is dropped 1.25 s later. How long does it take for the stones to be 25.0 meters apart?

What is the value of the temperature 15 degrees Celsius in degrees Kelvin?

Why is the liver important in digestion

A ball is dropped off the side of a bridge. after 1.55 s, how far has it fallen

What happens to sound waves after they are received by our ears?

Which of the following chemical equations demonstrates that atoms are conserved during a chemical reaction?

How can an objects momentum be calculated

Give 10 examples of units you might use or see in any given day

What are three problems that can result from poor soil management? Erosion Nutrient depletion Development Desertification