What are the signs of Q, W, and ?U for the process ?

A. 0, -, -
B. 0, +, +
C. +, -, 0
D. +, +, 0
E. -, +, 0
F. Other (specify)


E. -, +, 0

Physics & Space Science

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This figure shows the life track of a 1 solar-mass star from its beginnings in a collapsing cloud fragment until it becomes a main-sequence star. At which of the numbered points is the object generating energy primarily from hydrogen fusion?

A) Point 4 only B) Point 1 only C) Point 2 only D) Point 3 only E) Points 1, 2, and 3 F) Points 1 and 2 only

Physics & Space Science

The half-life of carbon-14 is 5730 years. A sample is found to have one-eighth the original amount of carbon-14 in it. How old is the sample?

A) 5730 years B) 716 years C) 45,800 years D) 17,200 years E) none of the above

Physics & Space Science

______________ is the only moon in the solar system to have retrograde motion

a. Ganymede b. Europa c. Callisto d. Titan e. Triton

Physics & Space Science

Andesitic magma produces

A) andesite rocks. B) granitic rocks. C) basaltic rocks. D) metamorphic rocks.

Physics & Space Science