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If I have light of three different frequencies, 9.2x10^14 Hz; 6.7x10^14 Hz; 4.7x10^14 Hz that is shined on a metal surface with the observations for each frequency labled A,B, and C as follows:A: No photoelectrons observedB: Photelectrons with a kinetic energy of 255 kJ/mol observedC: Photelectrons with a kinetic energy of 109 Kj/mol observedWhich of these observations corresponds to which frequency of light? Explain
A 75g lead sinker at 90 degrees celsius is placed in 500 cm^3 of water at 20 degrees celsius. What is the final temperature of the sinker
Compute the volume charge density of the atmosphere, assuming it to be uniform between 300 and 450 m. (Hint: You may neglect the curvature of the earth. Why?)
A box with a volume of 3.9 L contains 4 molecules. By what factor is the total number of states for all molecules increased
A loudspeaker of mass 20 is suspended a distance of 2 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of 2.90.
An apple is placed 13.6 cm in front of a diverging lens with a focal length of magnitude 22.4 cm. What is the magnification of the image of the apple
How much heat flows from 1.00 kg of water at 36.0°C when it is placed in contact with 1.00 kg of 22°C water in reaching equilibrium
If Jessica can accelerate at a speed of 5-m/s^2, how long will it take for her to reach a speed of 30.0 m/s.
Two point charges are on the y-axis. A 5.0 µC charge is located at y = 1.45 cm, and a -2.26 µC charge is located at y = -1.70 cm. Find the total electric potential at the origin
The bones of a saber-toothed tiger are found to have an activity per gram of carbon that is 14.70 of what would be found in a similar live animal. How old are these bones.
A set of crash tests consists of running a test car, moving at a speed of 12.8 m/s, into a solid wall. Calculate the size of the average force which acts on the dummy
The British gold sovereign coin is an alloy of gold and copper having a total mass of 7.988 g, and is 22-karat gold. Calculate the density of the British sovereign coin
Uranium has two naturally occurring isotopes. U238 (atomic mass 238.0508 u) has a natural abundance of 99.275% and U235 (atomic mass 235.0439 u) has an abundance of 0.720%.
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