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The surface temperature of the start Betelgeuse is 3500K. Assume Betelgeuse radiates as a perfect blackbody.
1) at what wavelength does Betelgeuse emits its most intense light?
2) in what part of the electromagnetic spectrum would you find this light?
3) what is the energy of each of these photons?
A 4900 kg lunar lander is in orbit 60 km above the surface of the moon. How much work must the thrusters do
If the angle between wires supporting the street lamp is reduced to 110°, what is the tension in each wire.
A large capacitance of 2.00 mF is needed for a certain application, What is the maximum voltage that can be applied
A factory worker pushes a 30kg crate a distance of 4.50 meters along a level floor at constant velocity by pushing it downward at an angle of 30degrees below the horizontal. The coefficient of kinetic friction between the crate and the floor is 0...
A state highway patrol car radar unit uses a frequency of 8.00×10^9Hz. What frequency difference will the unit detect from a car receding at the speed of 44.50 from a stationary patrol car.
The dummy in a crash test has a head of mass 3 kg. The dummy is strapped in firmly so that the body does not move. The car's forward speed changes from 24 m/s to zero in 0.23 s.
If the bullet buries itself in the block, find out how far along the ground that the block lands from the base of the table.
Constable Bob inspected skid marks near a traffic accident to determine the acceleration of initial velocity of lawn mower involved in the accident. Bob measured the lawn mower skid marks to be 32 m long. Witnesses said the lawn mower was skiddin..
A 3.0kg mass initially traveling in the +x direction at 3.0m/s collides with a 2.0kg mass traveling in the -x direction at 3.0m/s. find The coefficient of restitution between the two masses
A 15 ohm resistor is connected to the terminal of a 12 V battery, Sketch the circuit and Calculate the current in the circuit
The second ball, after rising, falls and also strikes the ground below. If air resistance can be neglected and if your downward and upward initial speeds are the same, explain how will the speeds of the balls compare upon striking the ground?
An engine absorbs 3,450 J of heat energy each cycle and expels 1,240 J. how much work does it do in one cycle
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