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A 74 kg student consumes 2500 Cal each day and stays the same weight. One day, he eats 3500 Cal and, wanting to keep from gaining weight, decides to "work off" the excess by jumping up and down. With each jump, he accelerates to a speed of 3.4 m/s before leaving the ground.
How many jumps must he make? Assume that the efficiency of the body in using energy is 25%
A 5 cm by 5 cm square loop of wire is rotating at 30 rpm in a uniform magnetic field of strength 3.0T. The direction of the field is perpendicular to the axis of rotation of the loop.
a cork floats on the water as a water wave passes by. what happens to the cork? will the corks vibrational frequency be
A particle with a charge of -60.0 nC is placed at the center of anon conducting spherical shell of inner radius 20.0 cm and outer radius 27.0 cm. The spherical shell carries charge by a uniform density of -2.95 µC/m3. A proton moves in acicular orbit..
Each cable has a length of l = 2.90 m. Illustrate what is the tension T in each of the cables? Use 9.80 m/s2 for the magnitude of theacceleration due to gravity.
Use the following values for mass and charge: an electron has mass me = 9.11×10-31 kg and charge -e, What is the kinetic energy of the electron in units of eV
A3.50-kg block starts from rest at the top of a 30.0° incline and slides a distance of1.90m down the incline in1.80s. Find the magnitude of the acceleration of the block
An unscratched spring has a length of 0.30 m. When the spring is stretched to a total length of 0.60 m, How fast will waves travel on this spring if it is stretched to 0.90 m
Quadrupole moments in the shell model
We want to rotate the direction of polarization of a beam ofpolarized light through 90o by sending the beam throughone or more polarizing sheets. What is the minimum number of sheets required
If the water in the river is flowing at 3.0 m/s, explain how long does it take the boat to make a round trip consisting of a 250 m displacement downstream followed by a 250 m displacement upstream?
An electron starts from rest 43.1cm from a fixed point charge with -0.150nC. How fast will the electron be moving when it is very far away
When a tuning fork of frequency 360 Hz is held above a tube filled with water the resonances are found when the water level is at 25cm and 75cm
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