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20 joules of work have been done in throwing a ball upwards how much kinetic energy it given to the ball.
The temperature of the skin is approximately 35 degrees celsius. At what wavelength does the radiation emitted from the skin reach its peak?
A satellite operates at an altitude of 20,200 km and utilizes communication frequencies of1575.42 MHz. Find the gravitational frequency change by respect to Earth.
A diathermy machine, used in physiotherapy, generates electromagnetic radiation that gives the effect of "deep heat" when absorbed in tissue. what is its wavelength
A small immersion heater is rated at 352 W. Estimate how long it will take to heat a cup of soup (suppose this is 250 mL of water) from 20°C to 50°C.
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 3.0L in the warm store at 74?F. By how much has the volume decreased
A fire helicopter carries a 580 kg bucket of water at the end of a 20.0 m longcable. Flying back from a fire at a constant speed of 40.0 m/s, Determine the force of air resistance on the bucket
two wooden blocks rest on an inclined plane making an angle of 30 degrees to the horizontal. the coefficient of friction between the block and plane for the first uk= 0.20, how fast is each block moving when it reaches the bottom
You place 108 moles of hydrogen gas in a balloon of volume 2.3 m3, and find the pressure to be 1.6 times atmospheric pressure. What is the typical speed of a hydrogen molecule?
An ideal gas sample occupies a container of volume 0.70L at STP. Find the number of moles in the sample
A long coaxial cable consists of an inner cylindrical conductor with radius a, isolated from an outer coaxial cylindrical conductor of inner radius b and outer radius c. Obtain the linear charge densities on the inner and outer surfaces of the oute..
a spherical shell with an inner radius of 10 cm and outer radius of 12 cm contains a net charge 10uc. at the center of
what is the magnitude of one of the masses.Vertically polarized light passes through two polarizers, the first at 62rm {^circ} to the vertical and the second at 90 rm {^circ} to the vertical.What fraction of light gets through.
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