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If one micrometeorite (a sphere with diameter of 1x10-6m) strikes each square meter of the Moon each second, how many years will it take to cover the Moon to a depth of 1m. To solve this problem, you can consider a cubic box on the Moon 1m on each edge, and find how long it will take to fill the box.
An ice cube sliding along the ground at 3 m/s goes off a ramp pointed straight up. What is the speed of the ice cube when it comes down, just before it hits the ground
Over 1.0E4 icebergs are calved from Greenland each year. These icebergs are a serious danger to Atlantic shipping becausemost of the iceberg remains under water, what is an iceberg's density
a 3.77-kg ball of clay is thrown downward from a height of 3.47 m with a speed of 4.81 ms onto a spring with k 1690
A person pulls a 5.0 kg sled by a rope across a floor. The coefficient of kinetic friction between the floor and the sled is 0.15. What is the magnitude of the normal force
A quarterback takes the ball from the line of scrimmage, runs backwards for 13.0 yards, What is the magnitude of the football's resultant displacement
A current of 0.307 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heartbeat and disrupting the flow of blood (and thus oxygen) to your brain.
If they are released from rest and allowed to fall toward one another, what is their speed when they first make contact?
A model rocket engine has an average thrust of 5.26 N. It has an initial mass of 25.9 g, which includes fuel mass of 13.4 g. What is the average exhaust speed of the engine
A car moves along an x axis through a distance of 950 m,starting at rest (at x = 0) and ending at rest (atx = 950 m). Through the first 1/4 of that distance, itsacceleration is +6.25 m/s2.
A 23.0 g block of copper whose temperature is 447 K is placed in an insulating box with a 92.4 g block of lead whose temperature is 132 K. find the equilibrium temperature of the two-block system
A parallel plate capacitor (air filled) that is maintained at a 20.0 V potential difference between plates, Calculate the surface charge density, and the charge on each plate
The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end, What is the skier's launch speed
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