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The Barringer meteor crater in northern Arizona is 180m 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 4×10^(5) m/s^2 as they plowed through the Earth, what was the meteor's speed at impact?
A door has mass M, width W, and height H. It is attached to a door frame by only two hinges: one at 5H/6 (the top hinge) and one at H/6 (the bottom hinge). Calculate the force that the door frame exerts on each hinge
A boy of mass 35 kg and a girl of mass 40 kg are skating towards each other with speeds of 2.5 m/s, and 2.0 m/s respectively. Assume that there is no friction, and find their combined velocity after they meet
One end of a spring is attached to a wall. A 28N pull on the other end causes the spring to stretch by 2.8cm, What is the spring constant
Find the wavelength of the scattered photon when the scattered electron has its maximum kinetic energy
A car is traveling north at 17.7m/s. After 12s its velocity is 14.10m/s in the same direction. Find the magnitude and direction of the car's average acceleration.
The critical angle for a special type of glass in air is 41.8. The index of refraction for water is 1.33. What is the critical angle if glass is immersed in water.
A playground merry-go-round is a disk of radius 4.0 m and mass 5,0 x 102 kg, initially stationary. what is the resulting angular velocity
At a certain location, Earth's magnetic field of 53 µT is horizontal and directed due north. find the angle between the current direction and due north
You drive on Interstate 10 from San Antonio to Houston, half the time at 60 km/h and the other half at 105 km/h. On the way back you travel half the distance at 60 km/h and the other half at 105 km/h.
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of81.0m/sat ground level. What is its velocity just before it hits the ground
The escape velocity of a bullet from the surface of planet Y is 1823 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.47 times that of Y,
How to find out the tension in the cable
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