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Brad tries out a weight-loss plan that involves repeatedly lifting a 45.0-kg barbell from the floor over his head to a height of 2.3 m. If he is able to complete three such lifts per minute, how long will it take for him to lose 0.50 kg of fat? "Burning" 1 g of fat supplies 39 kJ to the body; of this, 10% can be utilized by the muscles to lift the barbell. (Ignore the fat "burned" while he lowers the barbell to the floor.)
Louie Lemon rides on a Ferris wheel that takes 8.0 s to go once around; the radius of the wheel is 10.0 m. What is Louie's acceleration (magnitude and direction) when he reaches the lowest point of the ride
A canoe has a velocity of 0.430 southeast relative to the earth. Find the magnitude of the velocity of the canoe relative to the river
suppose you wish to fabricate a uniform wire fromnbsp2.50nbspg of copper. the wire is to have a resistance of rnbsp
ELECTRIC FIELD IN THE ATMOSPHERE
A motorcycle has a constant speed of 21.0 m/s as it passes over the top of a hill whose radius of curvature is 132 m. The mass of the motorcycle and driver is 343 kg. Determine the magnitude of the normal force that acts on the cycle.
A 700 N window washer is standing on a uniform scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3 m long. what is the force in each rope when washer stands 1 m from one end.
A glass plate having parallel faces and a refractive index of 1.54 lies at the bottom of a liquid of refractive index 1.62. Compute the angle of refraction of this light in the glass
An X-ray photon with a wavelength of 0.69 nm scatters off an electron at 123 degrees. What is the wavelength of the scattered X-ray in nm to 4 decimal places
As olenoid with 600 turns has a radius of .04 m and is 40cm long. If this solenoid carries a current of 12 A. what is the magnitude of the magnetic field at the center of solenoid.
What voltage must be applied to the 5.00 µF capacitor of a heart defibrillator to store 600 J in it, Find the amount of stored charge
a gun has a barrel velocity of 400 meters per second. at what angle would the gun have to be fired for the bullet to
Suppose a formula for gain in heat energy of an object is H = m(A - B), where m = mass and (A - B) is its rise in temperature between A degrees and B degrees (as in #4). Write an expression for the absolute uncertainty, delta-H, in terms of m, del..
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