A 1300 kg elevator is lifted at a constant speed of 1.3 m/s through a height of 22 m. How much work is done (a) by the tension in the elevator cable and (b) by gravity?

Steam is more dangerous than the boiling water because it has more a. Temperature b. Energy c. Heat

Tracking scores from past assignments

How do animals release water vapor?

You will not know this. Really I didn't. What is the darkest known substance.

What are some potential impacts to organisms during a global warming event?

What does Kepler's second law state? A. Planets travel in ellipses. B. Planets sweep equal areas in equal times. C. A planet's apparent backward movement is termed retrograde motion. D.

Why do charges build up in a cloud

How does the wave model of electrons orbiting the nucleus account for discrete energy values?

An ecosystem is all the populations of organisms that live together and A. the microorganisms that depend on them. B. the organisms that generate energy from sunlight. C. the physical factors with which they interact. D.

Which statement about magnetic poles is accurate? A) Same magnetic poles attract, while different magnetic poles repel. B) Same magnetic poles attract, while different magnetic poles attract.