A major league pitcher is recorded as having thrown a 105 mph fastball. What is the speed of the pitch in m/s? One mile is equivalent to 1609m.
A. 15 m/s
B. 235 m/s
C. 47 m/s
D. 34 m/s
C. 47 m/s
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A 12.0 V battery is placed across a 4.00
resistor. If the current through the resistor is 2.80 A, what is the internal resistance of the battery?
A. 0.200
B. 0.290
C. 4.29
D. 3.71
E. 0.800
Semiconductors: A simple junction transistor consists of three semiconductor sections consisting of
A. only pnp semiconductors. B. only npn semiconductors. C. either pnp or npn semiconductors. D. none of the given combinations.
A large ice cube is 30 cm on each side. If the length of each side is increased by a factor of two, the surface area
A. increases by a factor of ½. B. increases by a factor of 2. C. increases by a factor of 4. D. increases by a factor of 8.
The matter field of a hydrogen atom could best be described as
A) a probability pattern. B) an electromagnetic wave. C) a cloud of photons. D) a collection of electrons.