A block of wood and a block of copper will feel neither hot nor cold to your touch when they each have

A) equal temperatures.
B) your temperature.
C) equal conductivities.
D) none of the above


Answer: B

Physics & Space Science

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What is the frequency of a wave if its period is 0.25 seconds?

A. 1.0 Hz B. 0.25 Hz C. 12 Hz D. 4.0 Hz.

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The Sun is a ball of gas that is on fire

Indicate whether the statement is true or false

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The circuit below contains 3 100-W light bulbs and a capacitor. The emf is 110 V. Which light bulb(s) is(are) brightest? (Assume the capacitor is fully charged.)



a.
A

b.
B

c.
C

d.
A and B

e.
All three are equally bright.

Physics & Space Science

Determine the rms current for the circuit



a.
55 mA

b.
77 mA

c.
99 mA

d.
0.19 A

e.
61 mA

Physics & Space Science