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a- Calculate the heat, necessary to eliminated 200 g of liquid water from a container which has 400 g of ice at -10 C0.
b- Calculate the specific heat of an unknown material with mass equal to 65 g if during an experiment the unknown sample at 100 oC, was put into a calorimeter-water system at room temperature (24 oC) and the final temperature (unknown material, calorimeter and water ) after few minutes was 85 oF. (Consider the mass of the calorimeter equal to 20 g and the water 100 g and the specific heat of the calorimeter 0.9 J/g.C and the specific heat of the water 4.186 J/g.C).
How would the intensity of light vary with distance from the source according to the (a) wave theory, (b) particle (photon) theory?
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, by rotational inertia 4.31 kg·m2 about its central axis, is set spinning c..
A bolt is dropped from a bridge under construction, falling 92m to the valley below the bridge. (a) How much time does it take to pass through the last 26 percent of its fall? What is its speed (b) when it begins that last 26 percent of its fall a..
A laser emits 1.00 x10^20 photons/sec. The laser has a wavelength of 473 nm. What is the power output of the laser
A distance away from a uniformly charged spherical object, the magnitude of the electric field is 575V/m and the electric potential is 3.50kV. (a) What is the distance to the center of the object? (b) What is the magnitude of the charge?
You scatter x-rays of wavelength 0.0105 nm from the loosely bound electrons of a target material. Find the angle at which the wavelength of the scattered x-rays is longer
the speed of light in a certain material is measured to be 2.2*10^8 m/s. what is the index of refraction of this material
A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. Calculate the apparent thickness of the plate as viewed from above the water
What is the surface temperature of Betelgeuse, a red giant star in the constellation of Orion, which radiates with a peak wavelength of about 970 nm? Rigel, a bluish-white star in Orion, radiates with a peak wavelength of 145 nm. Find the temperature..
a 200 loop square coil 0.8m to a side lies in the xy plane. The current in each loop of the coil is 8A clockwise. find the torque on the coil due to the magnetic field
A gas is allowed to expand isothermally until it reaches its final volume and its pressure is 2.97 atm. Find the heat absorbed by the gas during this process
how come the formula: (change)v / (change)t = (change)x cannot be used for this exercise When a 58-g tennis ball is served, What is the magnitude of the net force acting on the ball
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