The ozone layer is produced by oxygen atoms that link to form O3
a. True
b. False
Indicate whether the statement is true or false
True
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Kinetic energy is conserved in __________ collisions
Fill in the blank(s) with correct word
The intensity of radiation reaching the Earth from the Sun is 1350 W/m2. The Earth's radius is 6.4 × 106 m. How big a force does this radiation exert on the Earth? (Assume it is all absorbed.)
A. 5.8 × 108 N B. 1.2 × 109 N C. 2.3 × 109 N D. 4.6 × 109 N E. 1.7 × 1017 N
When an acrobat hangs motionless from a pair of rings
a. she has no measurable weight. b. her weight depends on the angles the ropes make with the ceiling. c. her weight is reduced by the upward force the rings exert on her. d. her weight is increased by the upward force the rings exert on her. e. she exerts a gravitational force on the Earth that is equal to the sum of the forces the rings exert on her.
A rifle is aimed horizontally at the center of a large target 60 m away. The initial speed of the bullet is 240 m/s. What is the distance from the center of the target to the point where the bullet strikes the target?
a. 48 cm b. 17 cm c. 31 cm d. 69 cm e. 52 cm