One of the first atomic bombs released energy equivalent to that of 20,000 tons of TNT explosive. How much mass was converted to energy by this explosion, given that 1000 tons of TNT produce 4.3 × 1012 J of energy
Incidentally, modern H-bombs have energy yields 1000 times as much! (c = 3.0 × 108 m/s)
0.96 g
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An aluminum wing on a plane is 38 m long when the temperature is 20 oC. At what temperature (in oC) would the wing be 0.04 m shorter? Enter your answer to one decimal place. You should think about the physics of the situation before trying to solve the problem. (Hint: You are being asked for a temperature, not a temperature change)
RMS and Peak Quantities: A 0.150-kW lamp is plugged into a 120-V ac wall outlet. What are (a) the peak current through the lamp, (b) the rms current through the lamp, and (c) the resistance of the lamp?
What will be an ideal response?
In order to slide a 70.0 kg box across the floor at a constant speed, you must push horizontally with a force of 351 N. What is the coefficient of kinetic friction?
A. 0.149 B. 0.584 C. 0.337 D. 0.512 E. 0.678
Although a magnet can change the direction of travel of an electron beam, it cannot change its
A) speed B) kinetic energy. C) both of these D) neither of these