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Light hits the surface of water at an incident angle of35° with respect to the normal line. What is the angle between the reflected ray and the refracted ray?
Presume the needle moves 7.5 mm from its highest to its lowest position and it makes 26 stitches in 9.1 s. What is the highest needle speed.
An ideal gas has a pressure of 1.0 atm, a volume of 25.0 L at a temperature of 30 deg C. How many molecules are there in the gas
An electron and a proton are separated by 2.4 nm, What is the magnitude of the force on the electron
When the tips of the rotating propeller of an airplane have a linear speed greater than the speed of sound, the propeller makes a lot of noise, which is undesirable. If the length of the propeller is 2.354 m
A 3.34 bullet moving at 280 enters and stops in an initially stationary 3.40 wooden block on a horizontal frictionless surface. How much work was done in stopping the bullet
A spacecraft is traveling with a velocity of v0x = 4330 m/s along the +x direction. Two engines are turned on for a time of 728 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.74 m/s2.
Calculate the impulse experienced when a 66 kg person lands on firm ground after jumping from a height of 2.8m. Estimate the average force exerted on the person's feet by the ground if the landing is with bent legs
A satellite of mass 190 kg is placed into Earth orbit at a height of 600 km above the surface. how long does the satellite take to complete one orbit
At 100 degrees celsius the rms speed of nitrogen molecules is 576 m/s. Estimate the rate of molecular collisions (collisions/s) on this wall
Suppose you drop a feather and a steel ball of equal masses (0.010 kg) at the same time from a height of 1.9 m and you are told that the feather hits the floor 4.5 s after the steel ball. Estimate the feather's drag coefficient
A soap film formed in a loop of wire is, because of its weight, not exactly uniform in thickness, but wedge-shaped in cross section. By how much does the film differ in thickness over the distance
A student sits on a rotating stool holding two 3.9-kg objects. When his arms are extended horizontally, Find the new angular speed of the student
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