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Ten grams of ice at -20°C is to be changed to steam at130°C. The specific heat of both steam and ice is 0.5 cal/g °C. The heat of fusion is 80cal/g and the heat of vaporization is 540 cal/g. How much heat is necessary for the entire process?
An electron experiences a magnetic force of magnitude 4.20 10-15 N when moving at an angle of 45.0° with respect to a magnetic field of magnitude 3.90 10-3 T. Find the speed of the electron
A satellite is in a circular orbit very close to the surface of a spherical planet. What is density (mass/volume) of the planet
A 390 nm thick film floats on a puddle of water. When illuminated normally with 700 nm light there is no reflection, but 400 nm light is strongly reflected. What is the film's index of refraction
A converging lens (f = 11.4 cm) is located 33.0 cm to the left of a diverging lens (f = -5.4 cm). A postage stamp is placed 36.6 cm to the left of the converging lens. Find the overall magnification.
A train traveling at v0 = 25.0 m/s begins to brake by applying a velocity-dependent instantaneous acceleration a(v) = ? /(v u) m/s2, Determine the distance traveled by the train until it comes to a complete stop
A rock is thrown off a bridge of height 75m. at an angle theta=25 degrees with respect to the horizontal. The initial speed of the rock is 15 m/s. compute the maximum height reached by the rock?
to fill a childs inflatable wading pool you use a garden hose with a diameter of 2.9 cm. water flows from this hose
q. consider an infinite wire with radius r that carries a current ia compute b r for r lt rconsider a large parallel
A 180g block hangs from a spring with spring constant 6.0 N/m. At the block is 31cm below the equilibrium point and moving upward with a speed of 98.0cm/s. What is the block's position at t = 9s.
A satellite circles the earth in an orbit whose radius is 11 times the earth's radius. Estimate the period of the satellite
a jetliner is moving at a speed of 210 ms. the vertical component of the planes velocity is 45.1 ms. determine the
How long would it take for a net charge of 2.4 C to pass a location in a wire if it is to carry a steady current of 4.6 mA? If the wire is actually connected directly to the two electrodes of a battery and the battery does 22 J of work on the charge ..
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