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Q. What wavelength light would have to fall on sodium (with a work function of 2.46 eV) if it is to emit electrons with a maximum speed of 1.60 multiplied by 106 m/s?
Q. As part of a safety investigation, two 1900 cars traveling at 23 are crashed into different barriers. Find the average forces exerted on (a) the car that hits a line of water barrels and takes 1.5 to stop, and (b) the car that hits a concrete barrier and takes 0.5 to stop.
The triangular loop of wire in the drawing carries a current of I= 6.91 A. A uniform magnetic field is directed parallel to the side AB of the triangle and has a magnitude of 2.77 T.
A star is moving away from the Earth at the speed of 200 km/s. What will be the wavelength of a spectral line that would have the wavelength of 500 nm if the star were at rest.
How much work is completed in charging the capacitor
The truck slows down uniformly with an acceleration of 5.60 m/s2 for 4.20 s, making skid marks 62.40 m long that end at the tree. With what speed does truck then strike the tree.
What is least amount of work required by an external force
You're carrying a 3.6-m-long, 25kg pole to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35cm from its tip.
A real object is placed at the zero end of a meterstick. A large concave mirror at the 100 cm end of the meterstick forms an image of the object at the 70.0cm position. A small convex mirror placed at the 20 cm position forms a final image at the ..
Compute magnitude of the average velocity
A 27 pound meteorite struck a car, leaving a dent 21 cm deep in the trunk. If the meteorite struck the car with a speed of 500 m/s, what was the magnitude of its deceleration, assuming it to be constant.
A 20.00 kg wood ball hangs from the 1.10 long wires. The maximum tension the wire can withstand without breaking is 600 N. A 0.710 kg projectile travelling horizontally hits and embeds itself in the wood ball. What is the largest speed this projectil..
A submarine dives 90.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of submarine's displacement? (Imagine that upward and the direction of the submarine's horizontal motion is positive.)
Find out that the value of the gravitational field strength
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