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A 4 kg box is pushed up a frictionless 30 degree incline with a force of 40N. This 40 N force is parallel to the incline. Find the acceleration of the box and the magnitude of the normal force exerted by the box on the incline.
A photon undergoing Compton scattering has an energy afterscattering of 800 keV, and the electron recoils with an energy of 200keV
A 0.54-kg particle has a speed of 2.0 m/s at point A and kinetic energy of 7.5 J at point B. What is its speed at point b
A string provides a horizontal force which acts on a 500 N rectangular block at top right-hand corner, find the tension in the string required to start to tip the block over
The ground state total energy, total entropy, and temperature are 5.00 Btu, 0.11690 Btu/R, and 50.0°F, respectively. If the total entropy of the cell must be ten times its ground state value,
A lens with a refrective index of 1.5 is coated with a material of refractive index of 1.2 in order to minimize the reflection. what is the thinnest possible coating
What is the weight of the heaviest fish that can be pulledup vertically when the line is reeled in (a) at a constant speedand (b) with an acceleration whose magnitude is 2.0 m/s 2
a metallic sphere has a charge of 4.5 nc. a negatively charged rod has a charge of -6.0 nc. when the rod touches the
A crate is dragged 3m across a rough floor at a constant speed by a worker applying 500N at an angle of 30 deg above the horizontal. a) How many forces act on the crate? (identify them). b) How much work does each force produce?, c) What is the total..
Four objects are situated along the y axis as follows:a 2.01 kg object is at +2.98 m, a2.90 kg object is at +2.45 m, Where is the center of mass of these objects
Standard sea level pressure is approximately 1013 hPa andstandard surface temperature in the U.S Standard Atmosphere is 15degree C. What is the density of dry air under these conditions?
Assume that a 90.0 W light bulb radiates all its energy as a single wavelength of visible light. Estimate the magnetic field strength at the surface of the bulb
A charged isolated metal sphere of diameter 24.0 cm has a potential of 7400 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of the sphere.
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