Johnny throws a shotput at an angle of 45.° and it travels a horizontal distance of 30. meters. If he releases the shotput at the same speed but changes the angle to 55.°, what will be the new range (distance)?
A) 25. m
B) 28. m
C) 41. m
D) 32. m
E) 37. m
B
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The period of a satellite circling planet Nutron is observed to be 84 s when it is in a circular orbit with a radius of 8.0 × 10^6 m. What is the mass of planet Nutron?
a. 6.2 × 10^28 kg b. 5.0 × 10^28 kg c. 5.5 × 10^28 kg d. 4.3 × 10^28 kg e. 3.7 × 10^28 kg
A telescope performs best:
A) on a high mountaintop where the air is thin and steady. B) in a valley where the air is calm. C) on a hill close to the ocean where the atmospheric turbulence is high. D) close to a valley where the seeing is poor.
What important change in the Sun over the past four billion years is thought to be very important to understanding the climates of Venus, Earth, and Mars?
A) a gradual weakening of the solar wind with time B) a gradual dimming with time C) a gradual brightening with time D) a gradual reduction in the amount of ultraviolet and X-ray radiation coming from the Sun
A charge of 2.00 ?C flows onto the plates of a capacitor when it is connected to a 12.0-V battery. How much work was done in charging this capacitor?
A) 6.00 ?J B) 24.0 ?J C) 12.0 ?J D) 144 ?J E) 576 J