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Q1. Calculate the threshold wavelength, in nm, of a metal if that metal emits an electron with a kinetic energy of 6.32 × 10-19 J when illuminated with light that has a frequency of 1.97 × 1015 Hz.
Q2. Standing on the ground 3.3m from the wall of a building, you want to throw a package from your 1.6m shoulder level to someone in a second-floor window 4.1m above the ground. At what speed should the package be thrown to just make it through the window and at what speed should the package be thrown?
1) At what speed should you throw the package so it just barely reaches window?
2) At what angle should you throw the package so it just barely reaches window?
Determine the tension in each string
Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass and radius of orbit. The satellites fire rockets that provide force needed to keep a circular orbit around the space stat..
A rifle with a barrel length of 56 fires an 8 bullet with a horizontal speed of 350. The bullet strikes a block of wood and penetrates to a depth of 14. (a) What resistive force (assumed to be constant) does the wood exert on the bullet? (b) How long..
What is momentum of a truck speeding down the highway at a given instant? Discuss how the momentum is changed if the truck loses some of its cargo while maintaining the same velocity.
Find out the depth of the kerosene
Explain the spacing between allowed vibrational energy levels
At a right angle to a magnetic field. The acceleration of gravity is 9.81 m/s2. What is strength of the magnetic field necessary to exactly balance the weight of the proton and keep it moving horizontally.
A single loop of wire with an area of 0.0900 m2 is in a uniform magnetic field that has an initial value of 3.80 T, is vertical to the plane of the loop, and is decreasing at a constant rate of 0.190 T/s.
How much time is spent in pushing the mower
What is final speed of the block
What is speed of the resulting ball of clay
Find out separation between the two sources
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