A small sphere attached to a light rigid rod rotates about an axis perpendicular to and fixed to the other end of the rod. Relative to the positive direction of the axis of rotation, the angular positions of the sphere are negative, its angular velocity is negative, and its angular acceleration is positive. The sphere is
a. rotating clockwise and slowing down.
b. rotating counterclockwise and slowing down.
c. rotating clockwise and speeding up.
d. rotating counterclockwise and speeding up.
e. first rotating counterclockwise and then clockwise.
A
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Answer the following statement(s) true (T) or false (F)
1. Consider two q-vectors 
with possibly complex components. Their inner product 
is a real number.
2. The inner product of a vector with itself 
is a real number.
3. Consider two q-vectors 
with possibly complex components. Their inner product 
obeys the relation = 
4. Even though the observable Sy can only have the values 
, the expectation value 
can have any value between these two extremes.
The most massive stars generate energy at the end of their lives by fusing iron in their cores
Indicate whether the statement is true or false
You are moving at 120 km/h toward a stationary train. The train blows its 0.400-kHz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear?
A) 361 Hz B) 444 Hz C) 364 Hz D) 439 Hz
Two masses m1 and m2, with m1 < m2, have momenta with equal magnitudes. How do their kinetic energies compare?
a. KE1 < KE2 b. KE1 = KE2 c. KE1 > KE2 d. More information is needed.