A piece of chocolate melts in your mouth. This is an example of
a. heat conduction
b. heat convection
c. heat radiation
d. thermal expansion
e. none of the above
A
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A 120-V rms voltage at 60.0 Hz is applied across an inductor, a capacitor, and a resistor in series. If the rms value of the current in this circuit is 0.600 A, what is the impedance of this circuit?
A) 200 ? B) 141 ? C) 20 4 ? D) 120 ? E) 100 ?
The density of material at the center of a neutron star is approximately 1.00 × 1018 kg/m3. What is the mass of a cube of this material that is on each side. (One micron is equal to 1.00 × 10-6 m.)
A) 5.45 kg B) 4.74 kg C) 6.16 kg D) 6.70 kg
A light beam is traveling inside a glass block that has an index of refraction of 1.46. As this light arrives at the surface of the block, it makes an angle of 53.0° with the normal
At what angle with the normal in the air will it leave the block? A) 33.2° B) It will not leave. C) 43.2° D) 59.1°
If an object is in equilibrium, the net torque about any arbitrary axis must be zero
Indicate whether the statement is true or false