Raindrops are falling straight downward. When observed from a car traveling at 55.0 mi/h, the drops streak the side window at an angle of 60.0° with the vertical. Find the speed with which the drops are falling
31.8 mi/h
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A car heading north suddenly collides at an intersection with a truck of the same mass heading east. If they lock together and travel at 28 m/s at 15° north of east just after the collision, how fast was the car initially traveling?
A) 14 m/s B) 7 m/s C) 11 m/s D) 28 m/s
A device that makes use of a bimetallic strip is a
a. thermometer b. thermostat c. choke control in an old automobile d. all of the above e. none of the above
Why are X-rays and gamma rays considered dangerous forms of light? a. These forms of light are only produced by large, dangerous machines. b. There is no form of protection from these forms of light
c. These forms of light break through Earth's atmosphere. d. Photons of these wavelengths have high energy. e. These forms of light cause sunburn.
A 2.00 kg mass is located at (4.00 m, 0.00 m, 0.00 m) and a 4.00 kg mass is located at (0.00 m, 3.00 m, 0.00 m). The center of gravity of the system of masses is
A. (1.33 m, 2.00 m, 0). B. (1.33 m, 1.00 m, 0). C. (1.50 m, 1.33 m, 0). D. (2.00 m, 1.33 m, 0). E. (1.33 m, 1.50 m, 0).