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Filament is heated to 2000K and is a blackbody of area 1cm^2. Thermal power radiated is 90.7 W.
A) At what wavelength is it peaked?
B) What is the frequency associated with the above wavelength?
Two cubes make from the same material. The radiant energy per second emitted by the small cube (1L ) is 0.675j/s. What is the energy emitted per second by the large cube (2L)
The jumping squirrel. A squirrel wants to jump from a point A on a branch of a tree to a point B on another branch. at what angle to the horizontal should he jump
A planet of mass 7.00 1025 kg is in a circular orbit of radius 6.00 1011 m around a star. What is the change in kinetic energy of the planet
Free neutrons (unlike those in the nucleus of an atom) decay spontaneously into a proton, an electron and an antineutrino. How much energy is released in this decay
A proton is passing the origin. The magnetic field at the (x,y,z) position ( 1mm , 0 mm, 0 mm)is 1.0×10?13?^T. what is the direction of the proton
A plane is headed east with an air speed of 272.0 m/s, Find the velocity of the plane relative to the earth
To decrease the body temperature of a 66-kg person by 1.0 C , what mass of alcohol must be evaporated from the person's skin? Ignore the heat involved in raising the temperature of alcohol to its boiling point (why?) and approximate the human body as..
Doug uses a 29 horizontal force to push a 3.5 crate up a 1.5 -high, 20 frictionless slope. What is the speed of the crate at the top of the slope
A person consumes a meal containing 17 kcal. What is the power this meal produces if it is to be "burned off" due to exercise in 6 hours
Which of the following does not produce a magnetic field:
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 23.0 m/s at an angle 28.0 degrees; What is the vertical component of the ball's velocity
The concentration was reported as 10% CO2 at a temperature of 30oC and a pressure of 1.2 atm. The flow rate of flue gas is 18,000 m3/min. Determine the Partial pressure of CO2 in atm.
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