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Mass m1=10.0kg is located at the origin of a coordinate system. Mass m2=20.0kg is 1.20m to the right along the x axis. Mass m3=25.0kg is 90.0cm above the origin along the y axis. Find the coordinates of the center of mass of this system.
A small immersion heater is rated at 352 W. Estimate how long it will take to heat a cup of soup (suppose this is 250 mL of water) from 20°C to 50°C.
A 23--long log of irregular cross section lies horizontally, supported by a wall at one end and a cable attached 4.0 from the other end, Find the log's center of gravity
A string with a mass of 31 g and a length of 2 m is stretched under a tension of 67 N. How much power must be supplied to the string to generate a traveling wave that has a frequency of 51 Hz and an amplitude of 4 cm.
a driver puts on the brakes and decelerates from 25 m/s to zero in12.0s. what distance does the car travel
Calculate the speed of the second ship with respect to Earth if it is fired in the same direction the first spaceship is already moving
A string is wrapped around a pulley with a radius of 2.0cm. The pulley is initally at rest. What is the moment of inertia of the pulley
You have four 'point' masses, each having a mass of 3.0 kg. They are at the coordinates (2,3)m, (-2,5)m, (7,0)m, (0.4, -5)m. Where is the center of mass
A physics professor, equipped with a rocket backpack, steps out of a helicopter at an altitude of 617 m with zero initial velocity. (Neglect air resistance.) What is her average velocity for the entire trip
A ball is launched from a cannon at the ground level with speed v0=40 m/s at an angle 36.9 degrees above the horizontal. Find the horizontal range
A boy gets ready to slide down an icy hill with his sled.Assume that the friction from the ground is negligible. How far will the boy have slid after 3 seconds with that acceleration
Given that the weight of dry sandstone sample in air is 20.0g, the weight of saturated sample in air is 22.5g, What is the bulk volume of this sample and what is its porosity
A rod of length l and mass m, pivoted at one end, is held by a spring at its midpoint and a spring at its far end, both pulling in opposite directions. The springs have spring constant k, and at equilibrium their pull is perpendicular to the rod. ..
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