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Assume that a person can jump straight up a distance of 61 cm on the surface of the earth. How small would a planet have to be so that the person could jump totally off (i.e. jump up and not come down)? Suppose that Earth's radius is 6380 km and that the small planet has the similar density of the Earth.
A 100kg cannon at rest contains a 10kgcannonball. when fired, the cannonball leaves the cannon with avelocity of 90m/s. what is the magnitude of the recoil speed of the cannon
A rocket fires two engines simultaneously. One produces a thrust of 615 directly forward while the other gives a thrust of 474 at an angle 39.6 above the forward direction.
A ray of light, traveling in the air, strikes the surface of mineral oil at an angle of 27.9 degrees with the normal to the surface. What is the angle of refraction
The dial on an AM radio contains numbers ranging from about 530 to about 1600. What is the corresponding range of wavelengths
a charge of 80 mC moves with a velocity of 7*10^7 m/s in a magnetic field of 0.6T which is oriented at an angle of 30 degrees above the horizontal plane
A major-league pitcher can throw a ball in excess of 41.5 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the point of release
question jason leaves detroit at 200 p.m. and drives at a constant speed west along i-96. he passes ann arbor 40 mi
What is the mass of nitrogen in an nitrogen tank at 20C if the tank has a volume of 0,20m^3 and nitrogen pressure in the tank is 4,0 x 10^6 N/m^2
A 116 g stone is whirled in a horizontalcircle on the end of an 75 cm long string.The stone takes 1.3 s to make eachcomplete revolution. Determine the angle that the string makes withthe horizontal.
question two subway stops are separated by 1100 m. if a subway train accelerates at 1.2ms2 from rest through the first
A ping-pong ball has an average density of 0.0840 g/cm3 and a diameter of 3.80 cm. What force would be required to keep the ball completely submerged under water
q1. what is the electric potential energy of three equal positive charges of 1.33 microc while they are arranged to
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