A car is traveling with a constant speed when the driver suddenly applies the brakes, causing the car to slow down with a constant acceleration of magnitude 3.50 m/s2
If the car comes to a stop in a distance of 30.0 m, what was the car's original speed?
A) 10.2 m/s
B) 14.5 m/s
C) 105 m/s
D) 210 m/s
E) 315 m/s
B
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The most effective wavelengths to see through the clouds of Venus to the surface are
A) radio. B) gamma rays. C) infrared. D) ultraviolet. E) X-rays.
Which of the following wavelengths could NOT be present as a harmonic on a 2 m long string?
a. 4 m b. 2 m c. 1 m d. 0.89 m e. 0.5 m
A fire engine approaches a wall at 5 m/s while the siren emits a tone of 500 Hz frequency. At the time, the speed of sound in air is 340 m/s. How many beats per second do the people on the fire engine hear?
a. 0 b. 15 c. 29 d. 63 e. 250
The potential energy of a 3.5 pC charge separated by 6.2 cm from a 1.6 
C charge is
A. 
B. 
C. 
D. 
E. 