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The equation for kinetic energy for a body of mass m moving with velocity v is
Ek = 2mv.
If the mass of a body is decreased to 1/5th of its original mass and its velocity is increased by a factor of 5, by what factor has the kinetic energy changed?
Alan the astronomer is earth-bound and observes two quasars moving away from each other along a line that passes through the earth. Find at what speed are the quasars moving apart relative to each other
Determine the heat transfer and work for each of the processes. What is the internal energy change for Process 1-2? What is the internal energy change for Process 2-3? (There is an answer posted for the same question, but the answer does not appea..
How do I find the gravitation constant of G if M1 is 56.30, M2 is 72.20 Distance is 3.00m?
A mass m1 = 17.0 kg and a mass m2 = 10.5 kg are suspended by a pulley that has a radius of 9.8 cm and a mass of 3.1 kg (see figure). The cord has a negligible mass and causes the pulley to rotate without slipping.
A proton moving with speed 3.45 x 105 m/s in a field-free region enters an essentially uniform magnetic field of magnitude 0.795 T perpendicular to the velocity of the proton. Find at what distance Y does it exit the field
A certain organ pipe, open at both ends, produces a fundamental frequency of 256 in air.If the pipe is filled with helium at the same temperature, what fundamental frequency will it generate ? Take the molar mass of air to be 28.8 and the molar ma..
Suppose V rms = 240 V for an alternating current power source. What is the amplitude of the voltage for the source
A small blimp is used for advertising purposes at a football game. It has a mass of 86.6 kg and is attached by a towrope to a truck on the ground. how much work is done by the truck in pulling the blimpb
At the beginning of a new school term, a student moves a box of blocks by attaching a rope to the box and pulling with a force of F= 84.9N at an angle of 65 degrees, as shown in the figure. The acceleration of gravity is 9.8 m/s2.
Two railroad freight cars with masses 100 and 150 approach with equal speeds of 0.300, Find the velocity of the heavier car after the collision
A satellite is in an elliptical orbit at altitudes ranging from 250to 890 km. At the high point it's moving at 7.23 km/s. How fast isit moving at the low point?
Many of the elements in horizontal-bar exercises can be modeled by representing the gymnast by four segments consisting of arms, torso (including the head), thighs, and lower legs, as shown in figure (b).
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