Calculate the ground state energy (in eV) for an electron in a box (an infinite well) having a width of 0.050 nm
a. 10
b. 75
c. 24
d. 150
e. 54
d
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An 80.0-kg object is falling and experiences a drag force due to air resistance. The magnitude of this drag force depends on its speed, v, and obeys the equation
What is the terminal speed of this object? A) 6.45 m/s B) 72.2 m/s C) 34.2 m/s D) 12.6 m/s E) 47.3 m/s
A mole of iron has about half the mass of a mole of silver. Which likely has the greater heat capacity?
A. Iron B. Silver C. Both will have about the same heat capacity. D. One cannot say without measuring.
Answer the following statement(s) true (T) or false (F)
1. A car moves backward 10 m in 2 s at a steady rate. The car’s speed is therefore –5 m/s. 2. An object is moving at a constant velocity. This means that an interaction must be delivering momentum to the object at a constant nonzero rate. 3.A bicyclist rounding a curve at a constant speed is receiving a nonzero net flow of momentum. 4. A human being’s weight could be 150 kg. 5. Suppose a moving cart (cart A) hits an identical cart (cart B) at rest. Cart B remains at rest after the collision, and cart A rebounds with a speed equal to its original speed. Cart B must have participated in some other interaction during the collision process,
A jet flies at 1.4 times the speed of sound. What is the half-angle of the conical shock wave formed?
A) 46° B) 44° C) 30° D) 36°