About how long does light take to cross the Milky Way?
A.) About a month.
B.) About four years.
C.) About 26,000 years.
D.) About 100,000 years.
E.) Millions of years.
Answer: D.) About 100,000 years.
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vx is the velocity of a particle moving along the x axis as shown. If x = 2.0 m at t = 1.0 s, what is the position of the particle at t = 6.0 s?
?
?
A. ?2.0 m B. +2.0 m C. +1.0 m D. ?1.0 m E. 6.0 m
The circuit power factor of an RC circuit is 0.620. The rms value of the voltage applied to this signal is 120 V and the impedance is 200 ?. What is the average power of this circuit?
A) 44.6 W B) 89.2 W C) 60.0 W D) 0.620 W E) 124 W
RLC Circuits: A 120-V rms signal at 60 Hz is applied across a series combination of a 30-mH inductor and a 100-? resistor. What is the rms value of the voltage across the resistor?
A. 120 V B. 60 V C. 100 V D. 150 V E. 0.70 V
An arrow of mass 20. g is shot horizontally into a bale of hay, striking the hay with a constant velocity of 60. m/s. It penetrates a depth of 20. cm before stopping. What is the average stopping force acting on the arrow?
What will be an ideal response?