A wave moves in a rope with a certain wavelength. A second wave is made to move in the same rope with twice the wavelength of the first wave. The frequency of the second wave is half the frequency of the first wave
a. True
b. False
Indicate whether the statement is true or false
True
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Velma is in a train headed north past Mort at 30 m/s. Velma has a slingshot that can shoot pebbles at 40 m/s. Velma shoots a pebble toward the rear of the train. Mort observes the pebble's velocity to be
A) 70 m/s north. B) 70 m/s south. C) 40 m/s south. D) 10 m/s south. E) 10 m/s north.
A rectangular loop of wire measures 1.0 m by 1.0 cm. If a 7.0-A current flows through the wire, what is the magnitude of the magnetic force on the centermost 1.0-cm segment of the 1.0-m side of the loop? (?0 = 4? × 10-7 T ? m/A)
A) 4.9 × 10-6 N B) 9.8 × 10-8 N C) 9.8 × 10-6 N D) 7.8 × 10-7 N
Temperature Scales: Platinum melts at 3215°F. What is the corresponding temperature in the Kelvin scale?
A. 2041 K B. 2135 K C. 2207 K D. 2296 K E. 3215 K
A 16-nC charge is distributed uniformly along the x axis from x = 0 to x = 4 m. Which of the following integrals is correct for the magnitude (in N/C) of the electric field at x = +10 m on the x axis?
A.
B.
C.
D.
E.