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

Physics & Space Science

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A 12.0 V battery is placed across a 4.00resistor. 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

Physics & Space Science

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.

Physics & Space Science

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.

Physics & Space Science

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.

Physics & Space Science