Human activities that warm the Earth's atmosphere are caused by energy
A) production.
B) consumption.
C) both of these
D) none of the above
Answer: C
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A rocket with a mass of 500 grams is launched straight up. It achieves a velocity of 20.0 m/s in 2.00 seconds. The average thrust force of the engines on the rocket is
A. 7.50 N. B. 9.90 N. C. 12.0 N. D. 13.5 N. E. 20.0 N
A 120 N force is applied at an angle of 30.0 degrees above the horizontal to a 4.00 kg box. The box moves a horizontal distance of 8.00 meters. The change in the kinetic energy of the box is
A. 667 J. B. 750 J. C. 831 J. D. 890 J. E. 920 J.
A ball is thrown straight upward from ground level with a speed of 18 m/s. How much time passes before the ball strikes the ground if we disregard air resistance?
A) 3.7 s B) 1.8 s C) 1.1 s D) 0.6 s
______________ dating is used specifically to establish the absolute age of organic remains
Fill in the blank(s) with correct word