Atomic number refers to ________
Fill in the blank(s) with correct word
the number of protons in an atom
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A 4.00 kg mass is moving in a circular path with a constant angular velocity of 5.00 rad/sec and with a tangential velocity of 5.00 m/sec. The centripetal force on the mass is
A. 90.0 N. B. 100 N. C. 125 N. D. 169 N. E. 200 N.
A bulldozer attempts to drag a log weighing 500 N along the rough horizontal ground
The cable attached to the log makes an angle of 30° above the ground. The coefficient of static friction between the log and the ground is 0.50, and the coefficient of kinetic friction is 0.35. What minimum tension is required in the cable in order for the log to begin to slide?
In the reaction 2Al + 3F2? 2AlF3, the aluminum
a. is reduced. b. gains electrons. c. is oxidized. d. is the catalyst.
In a nuclear power plant, the reactor produces 500°C steam that is used to power the steam turbines which generate 1 500 MW of electrical power. The cooling tower eliminates the waste heat at 50°C. If the efficiency of the plant were that of a Carnot engine, at what rate would waste heat be vented to the atmosphere?