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Assume that the electric field in the Earth's atmosphere is E = 1.40 x 102 N/C, pointing downward. Find what is the electric charge in the Earth?
Assume a constant upward slope of 32; calculate the horizontal and vertical components of the acceleration of a truck that slowed from 140 to rest in 7.3.
A child's toy consists of a piece of plastic attached to a spring, estimate the force constant of the spring
we have ammeter and we measure the current of a bulb. when the ammeter is set on 300ma and the bulb is not as bright.
The beam current in a color TV tube is 1.9 rnA. The beam cross section is circular with radius 0.5 mm. What is the current density
Throughout three hours one winter afternoon, when outside temperature was 9° C, a house heated by electricity was kept at 21° C with the expenditure of 46kwh (kilowatt•hours) of electric energy.
A white billiard ball with mass mw = 1.52 kg is moving directly to the right with a speed of v = 3.22 m/s and collides elastically with a black billiard ball with the same mass mb = 1.52 kg that is initially at rest. What is the final speed of the..
A 95-kg fullback is running at 4.0 m/s to the east and isstopped in 0.75 s by a head-on tackle by a tackler running duewest. estimate the average force exerted on the tackler
A crate of mass 11.5 kg is pulled up arough incline with an initial speed of 1.50 m/s. The pulling forceis 100 N parallel to the incline, which makes an angle of16.0° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate..
A thin sheet of transparent material in air, with refractive index1.54, is illuminated by monochromatic light of wavelength 614nm. Calculate the wavelength of the light in the material.
A 0.400-kg ball approaches a very massive wall at 20.0 m/s perpediculat to wall and rebounds with 70.0% of its inital kinetic energy. find the magnitude of the change in momentum of the wall
The second-order bright fringe appears 7.800e-3 mfrom the centerline when a light is passed through a double-slitapparatus. Find the frequency of the light
Two blocks with masses M1= 4.9 and M2 = 3.5 are connected with a massless string over two massless and frictionless pulleys. What is the acceleration of mass M2
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