A 60-W light bulb connected to a 120-V source draws a current of
A) 0.25 A.
B) 0.5 A.
C) 2.0 A.
D) 4.0 A.
E) more than 4 A.
Answer: B
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The four plausible routes by which terrorists might use nuclear devices do not include
A) acquiring radioactive material and using conventional explosive to disperse this material. B) sabotaging a nuclear power plant. C) enriching natural uranium to weapons grade uranium, and building a nuclear weapon from it. D) obtaining weapons-grade uranium or plutonium and building a nuclear weapon from it. E) seizing an intact nuclear weapon.
Different temperatures within the solar nebula ultimately determined the compositions of the planets and their moons
Indicate whether the statement is true or false
In a helium-neon laser the emissions occur from transitions between two excited states in neon, one being at 20.66 eV above the ground state and the other being 18.70 eV above ground. What is the energy of the photons emitted by this laser?
A) 20.66 eV B) 1.96 eV C) 18.70 eV D) 19.60 eV E) 39.36 eV
Teflon tubing or 4 cm OD and 2.7 cm ID conducts 1.9 W/m when the outside temperature is 80ºC. Estimate the inside temperature of the tubing. Also predict the thermal resistance per unit length.
What will be an ideal response?