An astronaut in a rocket with a speed v-0.6c relative to Earth performs a collision experiment and concludes that both momentum and energy are conserved. What would an Earth observer conclude?
A. Neither energy nor momentum is conserved.
B. The collision never happened because the two objects are never in the same place at the same time.
C. Energy is conserved, but momentum is not.
D. Momentum is conserved, but energy is not.
E. Both momentum and energy are conserved.
E. Both momentum and energy are conserved.
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If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave having a
A) period of 1000 s. B) speed of 1000 m/s. C) wavelength of 1000 m. D) frequency of 1000 Hz. E) wavelength of 1000 km.
Where do you have to be on the Earth to view a lunar eclipse?
What will be an ideal response?
A toroid is made of 2000 turns of wire of radius 2.00 cm formed into a donut-shape of inner radius 10.0 cm and outer radius 14.0 cm. When a 30.0-A current is present in the toroid, the magnetic field at a distance of 11.0 cm from the center of the toroid is
a. 0.0857 T. b. 0.109 T. c. 0.120 T. d. 0.600 T. e. 0.685 T.
Groombridge 34 is an M1 V star. Based on this information, which of the following are true? I. Groombridge 34 has a surface temperature that is less than the Sun. II. Groombridge 34 has a mass that is greater than that of the Sun. III. Groombridge 34 is less luminous than the Sun. IV. Groombridge 34 is located near the middle of the H-R diagram
a. I & II b. II & IV c. I & IV d. I & III e. II & III