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A typical human body has surface area 1.4 m^2 and skin temperature 33 degrees Celcius. If the body's emissivity is about 1.0, what's the net radiation from the body when the ambient temperature is 25 degrees celcius?
A group of particles is traveling in a magnetic field of unknown magnitude and direction. What is the direction of this the magnetic force
a satellite is describing a circular orbit about the Earth with speed V. The satellite is separated into two pieces by explosive bolts which gave them an equal but opposite velocity, Find the two new orbits
Three forces in the x-y plane act on a 5.80 kg mass: 15.30 N directed at 59o, 12.20 N directed at 170o, Calculate the direction of the resultant force using the same sign convention as above
A pitcher claims he can throw a 0.145-kg baseball with as muchmomentum as a 3.00-g bullet moving with a speed of 1.50 x 103m/s. What must the baseball's speed be if the pitcher's claim is valid
How long would it take you to cover the 83 length of the walkway if, once you get on the walkway, you at once turns around and start walking in the opposite direction with a speed of 1.7 relative to the walkway.
If a capacitor has the initial charge of 5.0uC, L = 0.080H, C = 10uF, and R = 0, What is the maximum energy stored in the inductor
A hydrogen atom undergoes a transition from a 2p state to the 1s ground state. In the absence of a magnetic field, the energy of the photon emitted is 122nm. The atom is then placed in a strong magnetic field in the z-direction.
A 14 g ball of clay travelling east at 3.0 m/s collides with a 30 g ball of clay travelling north at 2.00m/s. What are the speed and the direction of resulting 44 g ball of clay.
A jet airplane in level flight has a mass of8.62104kg, and the two wings have an estimated total area of89.0m2. If the speed of air under the wings is232m/s, what is the speed of the air over the wings
The E string of a violin has a lenght of 0.33 m and a fundamental frequencynof 659 Hz. The tension of the string is 55N, What is the wave velocity of the string
Two point particles of charge Q1 = 46 µC and Q2 = 81 µC are found to have a potential energy of 43 J. What is the distance between the charges
Calculate the Coulomb potential energy of a sphere with radius R0, uniformly charged throughout its volume with the charge Ze. Hint: calculate the total energy associated with progressive addition of thin, charged spherical shells that constitute the..
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