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A snow surface has a temperature of -10C. What is the full spectrum remittance (assuming that snow can be treated as a blackbody for long wave radiation)?
The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. Because of these charges, What is the magnitude of the electric field in the membrane
A 250 kg flatcar 25 m long is moving with a speed of 3.0 m/s along horizontal frictionless rails. how far has the flatcar moved
An emf of 22.0 mV is induced in a 497 turn coil when the current is changing at a rate of 9.0 A/s. What is the magnetic flux through each turn of the coil
Two harmonic waves travelling in opposite directions interfere to produce a standing wave described by y'(x,t)=4sin5xcos6t where x is in (m) and t is in (s). What is the approximate frequency of the interfering waves?
A hydrogen atom in the n = 2 state absorbs a photon with wavelength 410nm, Find the change in the atom's potential energy
Two frictionless carts are pulled (horizontally to the left) by a force of F1=24N. m1=2.0kg and m2=4.0kg, find the tension in the connecting cord
Suppose 4.00 g of hydrogen is separatedinto electrons and protons. Suppose also the protons are placed atthe earth's North Pole and the electrons are placed at the SouthPole. What is the resulting compressional force on the Earth?
Suppose both skaters are initially moving v, but one has mass m and the other 2m. What point do they rotate about after they meet? What is the linear velocity of this point? What is the angular velocity of the system
you make five measurements of a particular wavelength and you find you have some random noise. your measurements are
A hamburger chain advertises that it has sold more than 50 billion hamburgers. Estimate how many pounds of hamburger meat should have been used by the restaurant chain and how many head of cattle were needed to furnish the meat.
q1. a father m 92 kg and son m 44 kg are standing facing each other on a frozen pond. the son pushes on the father
A transformer has the voltages 152 Vpri and 50 Vsec. A current 4.0 mA is flowing in the primary. What is the current flowing in the secondary
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