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Blue light of frequency 6.0 1014 Hz falls on the surface of potassium, which has a work function of 2.26 eV. Find the maximum kinetic energy of emitted electrons.
The output piston of a hydraulic press has a cross-sectional area of 0.20 cm2. What force is applied to the input piston if that piston has a diameter of 5.0 cm
n oil film (n = 1.40) of thickness 290 nm floating on water (n=1.33) is illuminated with white light at normal incidence
The neutral hydrogen atom in its normal state behaves in some respects like an electric charge distribution which consists of a point charge of magnitude +e surrounded by a distribution of negative charge
A car drives north at 42 mi/h for 10 {rm min} and then turns east and goes 5.0 {rm mi} at 62 mi/h. at last, it goes southwest at 30 mi/h for 6.0 {rm min}.
Two ants race across a table 56 cm long. One travels at 4.5cm/s and the other at 2cm/s. When the first one crosses the finish line how far behind is the second one.
A 1.5 kg bicycle wheel with a radius of 0.27 m turns at a constant angular speed of 28 rad/s when a(n) 0.33 kg reflector is at a distance of 0.14 m from the axle. What is the angular speed of the wheel
a 30 kg crate is pulled across a flat floor with 80 n of force. the coefficient of kinetic friction between the crate
What must the charge (sign and magnitude) of a 1.49-g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 660N/C?
An average force of 201 N is exerted to draw the string back 1.3 m. unless otherwise directed, imagine that air resistance is negligible. Illustrate energy bar graphs to solve the difficulty .
The hot-reservoir temperature of a Carnot engine with 26.0 % efficiency is 70.0 ?C higher than the cold-reservoir temperature. What is the cold reservoir temp
What is the angular acceleration of the wheel? If the wheel was initially at rest and the torque is applied for 15 s, what will be the rotational frequency of the wheel
A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. Determine the length of the lake
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