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An object at rest explodes into three peices of equal mass. One moves east at 20 m/s; a second moves 45 degrees south of east at 30 m/s. What is the velocity of the third piece?
Consider two widely separated conducting spheres, 1 and 2, the second having twice the diameter of the first, What is the ratio of the final surface charge density of sphere 1 to that of sphere 2
A fully equipped astronaut has a mass of 140 kg. If the astronaut has a weight of 675 N standing on the surface of a planet, what is the acceleration due to gravity on this planet?
In order for Sasha (in A-5) to feel weightless at the top of the ride, a) at what linear speed must the Ferris wheel tum? b) At this speed, how much would she appear to weigh at the bottom of the Ferris wheel.
how long does it take to reach the new equilibrium position.
Chromium is produced by reacting its oxide with aluminium. If 354 g of Cr2O3 and 158 g of Al react to form 204 g of Al2O3, how many grams of Cr are formed.
Two moles of an ideal gas are placed in a container whose volume is 6.9 x 10-3 m3. What is the average translational kinetic energy of a molecule of the gas
The mass of a newborn baby's brain has been found to increase by about 1.6 mg per minute. How much does the brain's mass increase in one day? How long does it take for the brain's mass to increase by 0.0045 kg ?
A 3-kilogram block slides along on a frictionless surface at 6 m/s north and strikes an obstacle that exerts an impulse on the block of 9 N-s to the south
A positively charged particle of mass 6.20 multiply.gif 10-8 kg is traveling due east with a speed of 50 m/s, What is the magnitude of the magnetic force acting on the particle
The power output of he Sun is 3.9 x 10^26 watts. Determine the intensity of the Sun's radiation on he planet Earth
The function y(x, t) = (25.0 cm) cos(?x - 20?t), with x in meters and t in seconds, describes a wave on a taut string. What is the transverse speed for a point on the string at an instant when that point has the displacement y = +22.0 cm?
let L=1.20m and d=0.120mm and assume the slit system is illuminated with momochromatic 500-nm light. Calculate the phase difference between the two wave
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