What type of particle is an electron? (There may be more than one correct choice.)
A) baryon B) hadron C) nucleon D) lepton E) meson
D
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A car is 200 m from a stop sign and traveling toward the sign at 40.0 m/s
At this time, the driver suddenly realizes that she must stop the car. If it takes 0.200 s for the driver to apply the brakes, what must be the magnitude of the constant acceleration of the car after the brakes are applied so that the car will come to rest at the stop sign? A) 2.89 m/s2 B) 3.89 m/s2 C) 4.17 m/s2 D) 3.42 m/s2 E) 2.08 m/s2
If a binary system has a period of 4 years and a separation of 5 AU, then the total mass is 7.8 solar masses
Indicate whether the statement is true or false
For three identical lamps in parallel with a 1.5-volt dry cell, the voltage across the lower lamp is
1) 1/2 V. 2) 1 V. 3) 1.5 V. 4) 3 V. If that lamp is disconnected, the other two lamps will 5) glow the same. 6) glow much more brightly. 7) glow much more dimly.
The angle between two plane mirrors that meet at one edge is 45°. The change in direction of a ray that strikes the first mirror at a 60° angle of incidence when that ray reflects from the second mirror is a. 0°
b. 45°. c. 90°. d. 150°. e. 270°.