YSOs are in hydrostatic equilibrium

a. True
b. False
Indicate whether the statement is true or false


False

Physics & Space Science

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Aluminum rod #1 is 1.0 m long with cross-section area 2.0 cm2 . Aluminum rod #2 is 2.0 m long with cross-section area 4.0 cm2 . Aluminum rod #3 is 3.0 m long with cross-section area 9.0 cm2 . If each rod has the same temperature difference applied across its ends, which rod has the greatest rate of transfer of energy between its ends?

a. #1 b. #2 c. #3 d. #2 = #3, both greater than #1 e. They each have the same rate.

Physics & Space Science

A series RLC circuit has resistance 200 inductance 0.200 H, and capacitance 0.500F If the circuit is at resonance with a 120 V rms source, what is the average power dissipated?

A. 144 W B. 120 W C. 77.0 W D. 72.0 W E. 100 W

Physics & Space Science

What are the appropriate units for the Sun's luminosity?

A) Kilograms B) Joules C) Watts D) Newtons

Physics & Space Science

What is the source of acid rain?

A) Acid rain is from dissolved carbon dioxide. B) All rain is acid rain because rain has a pH is less than 7. C) Rain is normally basic, but depending on the weather it can get slightly acidic. D) All rain is acid rain because rain has a hydronium ion concentration greater than 10-7 M. E) none of the above

Physics & Space Science