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The Barringer meteor crater in northern Arizona is 180 m deep and 1.2 km in diameter. The fragments of the meteor lie just below the bottom of the crater. If these fragments accelerated at a constant rate of 5×105m/s^2 as they plowed through the Earth, what was the meteor's speed at impact?
On an amusement park ride, passengers are seated in the horizontal circle of radius 6.5 m. The seats begin from rest and are uniformly accelerated for 24 seconds to a maximum rotational speed of 1.4 rad/s.
Explain why heat can only be transferred from a hot object to a cold object and not the other way around.
A stone is dropped into a well. The sound of the splash is heard 2.30 s later. What is the depth of the well
A 20.0 kg wood ball hangs from a 1.3 m long wire. The maximum tension the wire can withstand without breaking is 300 N. A 0.70 kg projectile travelling horizontally hits and embeds itself in the wood ball.
A sprinter of mass 63.7 kg runs at a constant speed of 10.8 m/s in a straight line. Find the extra force the sprinter must exert on the ground
A 30-meter steel tape is correct at a temperature of 20.0(C). The distance between two points, What is the true distance between the points
A rock is suspended from the string and moves downward at constant speed. Which statement is true concerning the tension in the string if air resistance is ignored.
Coefficient of linear expansion for aluminium
A 10,000 kg railroad car is rolling at 1.5 m/s when a 4000 kg load of gravel is suddenly dropped in. What is the car's speed just after the gravel is loaded
If the flare is fired at the same angle over the flat Sea of Tranquility on the moon, where g = 1.6 m/s2, describe what is its horizontal range?
The average frictional force exerted on him by the pole has a magnitude of 815 N, and his speed at the bottom of the pole is 3.7 m/s. Explain how far did he slide down the pole?
A pair of speakers separated by 0.900 m is driven by the same oscillator at a frequency of 672 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers. (Assume the spe..
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