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White light, with frequencies ranging from 4.20×1014 Hz to 7.74×1014 Hz, is incident on a calcium surface. Given that the work function of calcium is 2.87 eV
a) calculate the maximum kinetic energy of electrons ejected from this surface.
b) Calculate the lowest frequency for which no electrons are ejected.
c) Calculate the highest frequency for which no electrons are ejected.
What is the velocity of the gold pack after the collision. what least average speed must it have in the second half of the event in order to qualify.
An unstretched spring has a length of 0.30 m. while the spring is stretched to a total length of 0.60 m, it supports traveling waves moving at 4.5 m/s. How fast would waves travel on this spring if it is stretched to 0.90 m.
Over the next several weeks, Frank never saw any of the industry's logo items being worn or used by the workers. Instead the workers were uncommunicative towards him and at times even hostile
how long does it take the engine to lift the crate a vertical distance of 19.8 m? Friction in the system is negligible.
A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 11.0 m/s due north relative to the water. If the river is 330 m wide, explain how far downstream has the boat moved by the time it reaches the ..
For no apparent reason, a poodle is running at a constant speed of 4.40 {rm m/s} in a circle with radius 3.0 {rm m}. Let vec v_1 be the velocity vector at time t_1, and let vec v_2 be the velocity vector at time t_2.
A solid homogeneous sphere of mass M = 3.20 kg is released from rest at the top of an incline of height H=1.57 m, Determine the rotational kinetic energy of the sphere at the bottom of the incline
A ranger in a national park is driving at 52 km/h when a deer jumps onto the road 86 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -2.9 m/s2.
An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2. The coyote starts at rest 70.0 m from the edge of a cliff at the ins..
A 1.65 block is attached to a spring with spring constant 17. While the block is sitting at rest, a student hits it with the hammer and almost instantaneously gives it a speed of 59.
A sound source emits sounds of frequency 190 Hz that travel by still air at 340 m/s. The listener moves at 75 m/s relative to still air toward the stationary source. What is the wavelength of the sound between source and listener.
Discover minimum thickness of glass
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