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When light of wavelength 378 nm falls on a potassium surface, electrons are emitted that have a maximum kinetic energy of 1.9 eV. What is the work function of potassium? The speed of light is 3 × 10^8 m/s and Planck's constant is 6.63 × 10^?34 J · s . Answer in units of eV
What is the cutoff wavelength
What is the threshold frequency?
Cosider a series RLC circuit. Thw applied voltage has a maximum value of 160V ans ocscillates at a frq. of 74 Hz. Determine the value of the capacitor
Two tiny spheres have the same mass and carry charges of the same magnitude. Determine the charge magnitude
A system does 4.30 104 J of work, and 7.00 104 J of heat flows into the system during the process. Find the change in the internal energy of the system
question1a uniform meter stick with a mass of 250g is maintained horizontally by two vertical strings one at 0.0-cm
The plates of a parallel plate capacitor are separated by d = 2.8 cm. The potential of the negative plate is 0 V, and the potential halfway between the plates is +15 V. What is the electric field between plates (take the upward direction as the po..
At time t = 0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0° above the +x axis, What is the velocity of the puck at time t = 1.50 s
An ideal refrigerator does 140 J of work to remove 585 J of heat from its cold compartment during each cycle. How much heat per cycle is exhausted to the kitchen
Starting from rest, a 4.50-kg block slides 3.00 m down a rough 30.0° incline. Determine the work done by the friction force between block and incline
A Goodyear blimp typically contains 6280 m3 of helium (He) at an absolute pressure of 1.10 x 105 Pa. What is the mass (in kg) of the helium in the blimp
A sea breeze advects moist air over an area where atmospheric conditions are T = 20 degrees C and r = 0.70, and the surface is T = 5 degrees C. At what temperature will fog form?
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.170 g and a charge of magnitude q. Find the magnitude of the charge on the balls
If an object is placed 0.820cm from the objective lens, calculate the distance between the lenses when the microscope is adjusted for a relaxed eye
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