If a body's acceleration is doubled then the amount of force acting on the body had to _______
a. double b. halve
c. stay the same d. None of the other choices are correct.
a
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In the context of life in the universe, which of the following discoveries of astronomy suggests that enormous numbers of habitable worlds may exist in the universe?
A) the laws of physics are the same everywhere B) the universe is very old C) the universe is very large D) the building blocks of life are common
When an external resistor of resistance R1 = 14 ? is connected across the terminals of a battery, there is a current of 6.0 A through the resistor
When a different external resistor of resistance R2 = 64.4 ? is connected instead, the current is 2.0 A. Calculate (a) the emf of the battery and (b) the internal resistance of the battery.
Doubling the wavelength of a photon would ______________ its energy
Fill in the blank(s) with correct word
Power: A series circuit has a 50-Hz ac source, a 60-? resistor, a 0.50-H inductor, and a 10-?F capacitor, as shown in the figure. The rms current in the circuit is 2.2 A. What is the power factor of the circuit?
A. 0.35 B. 0.33 C. 0.31 D. 0.30 E. 0.28