A pulsar emits bursts of radio photons
a. True
b. False
Indicate whether the statement is true or false
True
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When a girl swings in a tire swing, the tangential acceleration in the rope
A. is the greatest at the highest point of the motion. B. is the greatest at the lowest point of the motion. C. is the greatest at a point neither highest nor lowest. D. is constant.
The electric field around an isolated electron has a certain strength at a 1-cm distance from the electron. The electric field strength 2 cm from the electron is
A) half as much. B) the same. C) twice as much. D) four times as much. E) none of the above
Uniform Circular Motion: A 20-g bead is attached to a light 120-cm-long string as shown in the figure. This bead moves in a horizontal circle with a constant speed of 1.5 m/s. What is the tension in the string if the angle ? is measured to be 25°?
A. 0.089 N B. 0.041 N C. 0.20 N D. 0.22 N E. 0.46 N
A 100.0 kg mass is blown apart into a 95.00 kg piece and a 5.000 kg piece. After the blast, the two masses are moving apart with a relative velocity of 100.0 m/s. The kinetic energy of the 5.000 kg mass after the explosion is
A. 6,850 J. B. 7,500 J. C. 9,570 J. D. 11,500 J. E. 22,560 J.