When a ball is thrown straight up with no air resistance, the acceleration at its highest point
A) is upward.
B) is downward.
C) is zero.
D) reverses from upward to downward.
E) reverses from downward to upward.
B
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An ideal solenoid having a coil density of 5000 turns per meter is 10 cm long and carries a current of 4.0 A. What is the strength of the magnetic field at its center?
A) 13 mT B) 3.1 mT C) 6.2 mT D) 25 mT
A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is 8 m/s2
a. True b. False Indicate whether the statement is true or false
200 Joules of heat flows into a 35 g sample. If the temperature increases by 10
then what is the heat capacity of the sample, in J/ 
C?
A. 8.0 B. 12 C. 16 D. 20 E. 32
A ray of light traveling in air strikes the surface of a certain plastic slab at 63.0° with respect to the normal in air. It travels in the plastic slab at a 30.6° angle with respect to the normal. Find the critical angle for the plastic in air
What will be an ideal response?