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A molecule of a mass m and velocity v strikes a wall and is reflected maintaing the same speed. The intitial and final velocities make an angel of 60 degrees with the normal (the perpendicular to the wall). What is the magnitude of the impulse imparted by the wall to the molecule?
An 8.3kg crate is pulled 4.9m up a 30? incline by a rope angled 19? above the incline. What is the increase in thermal energy of the crate and incline
A female orb spider has a mass of 0.45g . She is suspended from a tree branch by a 1.0m length of 0.0020-mm-diameter silk. If you tap the branch and send a vibration down the thread, how long does it take to reach the spider
A 0.157kg ball is thrown straight up from 1.94m above the ground. Its initial vertical speed is 9.60 m/s. A short time later, it hits the ground. What is the total work done by the force of gravity during that time.
Explain how does a magnitude of the electrical force between a pair of charged particles change when they are brought to half their original distance of seperation?
An astronaut weighs 7*10^2 N on the surface of the earth (M earth=5.98*10^24 kg). What is her weight 7.70*10^6 m above the earth.
You perform a double-slit experiment in order to measure the wavelength of the new laser that you received for your birthday. What is your laser's wavelength expressed in nanometers
A beam of neutrons with a de Broglie wavelength of 0.260nm diffracts from a crystal of table salt, which has an interionic spacing of 0.280nm, What is the speed of the neutrons
City lies directly west of city . When there is no wind, an airliner makes the 6130 round-trip flight between the two cities in 6.50 of flying time while traveling at the same speed in both directions. How fast is the wind blowing
Use the Fourier series method to evaluate the deviation of the bone subjected to the load, w, which is linearly dependent on its position
How to find out the tension in the cable
A more realistic car would cause wheels to spin in a manner that would result in the ground pushing it forward with a steady force.
A ball of m1 is held slightly above ball of mass m2. The two balls are droped simultaneously, falling distance h vertically from rest. Calculate the height to which the first ball rebounds
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