A hot air balloon contains 85,000 moles of air. To what temperature must the

air be heated to fill a volume of 2500 m at a pressure of 100 kPa? A. 260K

B. 2900 K C. 350 K

D. 0.35 K

A block has a volume of 0.09 m3 and a density of 4,000 kg/m3. What's the force of gravity acting on the block in water? A. 3,038 N B. 882 N C. 2,646 N D. 3,528 N

The radius of a conducting wire is doubled. What will be the ratio of its new specific resistance to the old one?

pretend you are an astronaut standing on the moon while the moon is in full moon position. you are standing in the middle of the side of the moon closest to earth. how would the ground around you look?

Humans are a part of the Earth system. List at least three examples of how you, in particular, influence one or more of Earth's major spheres

How to find the velocity using a graph

A flashlight beam strikes the surface of a pane of glass (n = 1.50) at a 61° angle to the normal. what is the angle of refraction?

Why is there controversy to the opinion that human contribution of carbon dioxide to the atmosphere is cause warming

If the resistance of a circuit increases, that means that the current has to

One watt is equal to which of these values? 1 joule/hour 1 joule-hour 1 joule/second 1 joule-second

What are some of the benefits of learned optimism that have been found in research? O A. Fewer health problems O O B. All of these C. Making more money O D. A lower divorce rate