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Calculate how much mass energy in Joules is contained in a Helium nucleus? What fraction of mass is released as energy when Hydrogen fuses to Helium in the sun?
An elephant's legs have a reasonably uniform cross section from top to bottom, and they are quite long, pivoting high on the animal's body. how many steps per minute will the elephant take
The projection lens in a certain slide projector is a single thin lens. A slide 24.3 mm high is to be projected so that its image fills a screen 1.86 m high. Determine the focal length of the projection lens
Make a drawing of a metal rod that has length 12cm and a total mass of 70g including two metal loops at both ends, which go around two metal poles. find the magnitude of the magnetic field in the region of the rod
A bicycle has wheels of radius 0.32 m. Each wheel has a rotationalinertia of 0.080 kg*m2 about its axle. The total mass of the bicycle includingthe wheels and the rider is 79 kg.
A tennis ball has a mass of 0.057kg. A professionaltennis player hits the ball hard enough to give it a speed of50m/s(about 120mph). The ball hits a wall and bounces back withalmost the same speed(50m/s). The ball is crushed 2cm(0.02m) at theinsta..
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, Find the mass of the gold in the rock
An oscillating block-spring system has a mechanical energy of 1J, amplitude of 10 cm, and a maximum speed of 1.20 m/s. Discover (a) the spring constant, (b) the mass of the block, and (c) the frequency of oscillation.
A park merry-go-round consists of a 210 kg circular wooden platform 3.90 m in diameter. Four children running alongside push tangentially along the platform's circumference until, starting from rest, the merry-go-round reaches a steady speed of on..
what is the electric field magnitude at the point40 due to a charge at the origin 00? what is the magnitude of the
Compare the notions of time and probability averages. When do the two coincide? What happens if they are unrelated?
What is the maximum allowable deflection (in inches) of a platform plank 7'-0" long
A rectangular loop of wire lies in the plane formed by the line y=x and the z-axis. The square has area of 280cm^2 so that A= (39.6i - 39.6j) x 10^-3. A magnetic field B= 0.32T points in the negative x direction.
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