In 1921, the Nobel Prize in physics was awarded to ________ for his work on the particle nature of light
Fill in the blank(s) with correct word
Albert Einstein
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Negative work can be done
a. by friction on the tires while a car is accelerating without skidding. b. by a spring at the bottom of an elevator shaft when it stops a falling elevator. c. by a hand catching a ball. d. by all of the above. e. only by (b) and (c) above.
Projectile Motion: A projectile is fired at an angle above the horizontal at a location where g = 9.8 m/s2. The initial x and y components of its velocity are 86.6 m/s and 50 m/s respectively. At what angle was the projectile fired above the horizontal?
A. 45° B. 60° C. 30° D. 90° E. 75°
If the distance between two point charges is doubled, the mutual force between them will be changed by what factor?
a. 4 b. 2 c. 1/2 d. 1/4 e. 1
Which property of the Solar nebula was the most influential in giving the planets their characteristics?
A. temperature B. volume C. mass D. pressure