A baseball is hit at ground level. The ball is observed to reach its maximum height above ground level 3.0 s after being hit. And 2.5 s after reaching this maximum height, the ball is observed to barely clear a fence that is 97.5 m from where it was hit. How high is the fence?
A. 8.2 m
B. 15.8 m
C. 13.5 m
D. 11.0 m
E. 4.9 m
Answer: C
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A. 9.00 atm B. 90.0 atm C. 100 atm D. 111 atm E. 130 atm
What is the most important role that the carbon dioxide cycle plays in the regulation of the Earth's climate?
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A square is 1.0 m on a side. Point charges of +4.0 ?C are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 ?C and -3.0 ?C
What is the potential (relative to infinity) at the midpoint of the square? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 ) A) 1.0 × 104 V B) 1.0 × 105 V C) 1.0 × 106 V D) 0 V E) infinite
A bubble having a diameter of 1.00 cm is released from the bottom of a swimming pool where the depth is 5.00 m. What will the diameter of the bubble be when it reaches the surface? The temperature of the water at the surface is 20.0°C, whereas it is 15.0°C at the bottom. (The density of water is 1.00 × 10^3 kg/m3.)
a. 1.05 cm b. 1.15 cm c. 1.45 cm d. 1.65 cm e. 1.35 cm