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Assuming a planet of mass m moves around the Sun (with mass Ms) in a circular orbit of radius R,(a) find its rotation period(b) explain how the period changes if the mass of the planet is doubled
Two particles of equal mass m are at the vertices of the base of an equilateral triangle. What is the mass m' at the third vertex
A spaceship of mass 2.3×106 is cruising at a speed of 5.6×106 when the antimatter reactor fails, blowing the ship into three pieces. One section, what is the direction of the third piece
A student at another university repeats the experiment you did in lab. Her target ball is 0.860 m above the floor, What is the kinetic energy (in joules) of the target ball just after it is struck
Two small identical conducting spheres are placed with their centers 25 cm apart. One is given a charge of 20.0 nC and the other given a charge of -36.0 nC. What is the electrical force of each sphere on the other?
One kilomole of an ideal gas undergoes a free expansion, tripling it's volume. What is the change of entropy of the universe
a hydraulic jack has an in[put piston area of 2 cm^2 and an output piston area of 18 cm^2. What will be the pressure on the oil
A ball of mass m is tied to a vertical (Cyclinder) post of radius R. The mass slides on a frictionless, What is the angular momentum of the ball after the string has wrapped once around the post
A person with perfect pitch sits on a bus bench listening to the 438 Hz horn of an approaching car. If the person detects a frequency of 475 Hz, how fast is the car moving
an equeous solution contaning 0.003 M NaCl and 0.005 M CaCl2 is mixed with the polysacharide alingate to creat aahigh- viscosity liquid, calculate the activity coefficient of all ionic species at 25 C
A ball thrown horizontally at 30m/s travels a horizontal distance of 44m before hitting the ground. From what height was the ball thrown
A 120g ball moving at .30 m/s in the + x-direction is subject to a 0.15N force in the - y-direction for 3.0s. Find the magnitude of the ball's momentum change
Lead has a latent heat of fusion of 2.32x104 J/kg, a specific heat of 128 J/(kg K), and a melting point of 228°C. Calculate heat needed to melt the bullet
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