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A spring is subjected to a force of 40 Newtons at a rest position. When an additional load of 3 N is exerted the spring has moved by 20 cm. Calculate the spring constant k of this spring.
A certain kind of glass has an index of refraction of 1.660 for blue light of wavelength 430 nm, what is the angle between the two beams inside the glass
Sam, whose mass is 71kg , takes off across level snow on his jet-powered skis. What is Sam's top speed
A point charge q1 = 4.0 µC is at the origin and a point q2 = -6.0 µC is on the x axis at x = 3.0 m. Find the magnitude of the electric force on q2 in mN
A tow truck pulls a car 5.2 km along a horizontal roadway using a cable having a tension of 790.
Having captured a mouse, an owl is flying towards the barn where it lives to enjoy dinner. How much times passes before the mouse hits the ground
A slab of a thermal insulator with a cross-sectional area of 120cm2 is 3.00cm thick
A nickel crystal is used as a diffraction grating for x-rays. Then the same crystal is used to diffract electrons. what is the kinetic energy of each electron
An amusement park ride is engineered to toss a victim straight up at 30 mph and then to have this victim fall into a pool of water 20 ft below the starting position. What is this time
a 5 kg block is placed at rest 5 m (as measured from the uncompressed spring) along a smooth 37degrees incline. How high is the next bounce
A stunt pilot in an air show performs a loop-the-loop in a vertical circle of radius 2.83 x 103 m. At what speed will the pilot experience weightlessness
An 8.00 kg package in a mail-sorting room slides 2.00 m down a chute that is inclined at 53.0o below the horizontal. What is the net work done on the package
A group of students are camping in the middle of the forest on a very dark night. Their torch batteries went flat hours ago. find the speed of the unidentified noisy object
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