In an isochoric process, the internal energy of a system decreases by 50J. What is the work done?
A. zero
B. +50 J
C. -50 J
D. none of the above
A. zero
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RC Circuits: A resistor, an uncharged capacitor, a dc voltage source, and an open switch are all connected in series. The switch is closed at time t = 0 s. Which one of the following is a correct statement about the circuit?
A. The capacitor charges to its maximum value in one time constant. B. The capacitor charges to its maximum value in two time constants. C. The potential difference across the resistor is always equal to the potential difference across the capacitor. D. Current flows through the circuit even after the capacitor is essentially fully charged. E. Once the capacitor is essentially fully charged, there is no current in the circuit.
If inflation really occurred, then our observable universe is only a tiny portion of the entire universe born in the Big Bang
Indicate whether the statement is true or false
The color force between quarks is carried by mesons
Indicate whether the statement is true or false
The circuit below contains 4 100-W light bulbs. The emf is 110 V. Which light bulb(s) is(are) brightest?
a.
A
b.
B
c.
C
d.
D
e.
C and D