You throw a ball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down

A) Work up is -, and the work down is -.
B) Work up is +, and the work down is +.
C) Work up is -, and the work down is +.
D) Work up is +, and the work down is -.


C

Physics & Space Science

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A refrigerator uses 40.0 J of work to extract heat from a heat reservoir at If the coefficient of performance of the refrigerator is 2.10, then how much heat is discharged out of the refrigerator at a higher temperature?

A. 52.0 J B. 66.0 J C. 86.0 J D. 124 J

Physics & Space Science

The rapid rotation of Uranus and its high inclination give the magnetosphere and its long extension a(n) _______________ shape

Fill in the blank(s) with correct word

Physics & Space Science

How do we know there was a big bang?

What will be an ideal response?

Physics & Space Science

A barge with vertical sides is 10.0 m wide and 60.0 m long and is floating in fresh water. How much deeper into the water does the barge sink when 300,000 kg of coal are loaded on the barge?

A) 25.0 cm B) 50.0 cm C) 75.0 cm D) 1.00 m E) 1.50 m

Physics & Space Science