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If one micrometeorite (a sphere with a diameter on the order of 1.7 x 10^-6 m) struck each square meter of the Moon each second, estimate the number of years it would take to cover the Moon with micrometeorites to a depth of 1.0 m? (Hint: Consider a cubic box, 1.0 m on a side, on the Moon, and find how long it would take to fill the box.)
An empty parallel plate capacitor is connected between the terminals of a 10.2-V battery and charges up. what is the new voltage between the plates of the capacitor
A charging bull elephant with a mass of 5240 kg comes directlytoward you with a speed of 4.55m/s. You toss a 0.150 kg rubber ballat the elephant with a speed of 7.81 m/s.
A monoenergetic beam of electrons is incident on a single slit of width 0.95 nm. A diffraction pattern is formed on a screen 24 cm from the slit. what is the energy of the incident electrons
Two crates, of mass 75.0 kg and 109 kg, are in contact and at rest on a horizontal surface. A 732 N force is exerted on the 75.0 kg crate. What is the force the each crate exerts on the other.
a 2.70-kg ball moving to the right at a velocity of 3.39 ms on a frictionless table collides head-on with a stationary
A cannonball sits on top of a 10 meter cliff and is fired at a 10 degree angle with an initial velocity of 50 m/s. How long is the cannonball in the air
Find the resultant magnetic force exerted by the long wire on the square current loop in the figure below if I1 = 8.72 A and I2 = 4.12 A
A solar cell generates a potential difference of 0.1452 V when a 500 ? resistor is connected across it, and a potential difference of 0.2195 V when a 1000 ? resistor is substituted. What is the emf of the solar cell
A pipe springs a leak, which causes a stream of water to rise 8.0meters into the air. What is the minimum pressure within the pipe? Determine the velocity of the stream at the leak. If the hole is 1.0cm in diameter, determine the mass rate of flowthr..
Two railroad cars, each of mass 7300 kg and traveling at 73 km/h, collide head on and come to rest. How much mechanical energy is lost in this collision
A loudspeaker of mass 22 {rm kg} is suspended a distance of h = 1.60 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.30 {rm m}.
One of the concrete pillars that supports a house is 2.3 m tall and has a radius of 0.69 m. Find the weight of this pillar in pounds
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