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Electrons are emitted from a surface when the light of wavelength 500 nm is shone on the surface but electrons are not emitted for longer wavelengths of light. What is the work function of the surface?
An oscillating block-spring system has a mechanical energy of 2.27 J, an amplitude of 8.07 cm, and a maximum speed of 1.43 m/s. Find (a) the spring constant, (b) the mass (in kg) of the block and (c) the frequency (in Hz) of oscillation.
two stationary positive point charges charge 1 of magnitude 3.10nc and charge 2 of magnitude 1.75nc are separated
A square with sides of length L has a point charge at each of its four corners. Find the magnitude and sign of the charges Q such that each of the +1.00 µC charges experiences zero net force
An electron moving with a velocity of 2.7 x10^6 m/s in the positive x direction enters a region, What is the magnitude of the electron's acceleration
The specifications for a ceiling fan you have just bought indicate that the total moment of inertia of its blades is 0.13 kg · m2, What is the angular acceleration of the blades
Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly nine months, as measured by a clock on board the spacecraft, and then return home at the same speed. Upon return, the people on earth will have a..
In figure, a ball is thrown up onto a roof, landing some timelater at height h = 20.0 m above and d = 30.0 mhorizontally from the release point. The ball's path just beforelanding is angled at θ = 60.0o with the horizontal roof. (a)Find the time o..
An semicircular arc with a radius of B is split into two. The arc is in the xy-plane such one part is in the first quadrant, What is the electric field vector at the origin
A 6.250 keV x-ray photon strikes a carbon atom and is scattered with a Compton scattering with one of the carbon’s electrons. The energy of the scattered photon is measured to be 6.175 keV. What is the wavelength of the scattered photon? During what ..
a stationary particle of chargeq 2.7 times 10-8 c is placed in a laser beam an electromagnetic wave whose intensity is
a hamster gets on a stationary wheel with radius 0.15 m and runs until wheel rotates at angular speed of 12.0 rad/s in 4.0 s What is tangential acceleration of wheel's edge
Picture yourself in the castle of Helm’s Deep from the Lord of the Rings. You are on top of the castle wall and are dropping rocks on assorted monsters that are 16.15 m below you. Just when you release a rock, an archer located exactly below you s..
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