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A student is pushing a crate up a 20 degree incline. The crate has a mass of 20 kilogram, and the coefficient of friction between the crate and the incline is 0.25.
(a) Draw a free-body diagram of the crate.
(b) Find the magnitude of the normal force between crate and incline.
(c) Find the magnitude of the friction force between the crate and the floor.
In a two-slit experiment a third order bright fringe is observed at an angle of 7.10°. If the wavelength of light is 595 nm, what is the slit separation?
The total energy of a particle is 3.97 times its rest energy. The mass of the particle is 2.8 × 10^-27 kg. With what speed is the particle moving and what is the particle's momentum
A proton beam in an accelerator carries a current of 148 ?A. If the beam is incident on a target, how many protons strike the target in a period of21.0 s
A suitcase falls out of an airplane which is 400 meters above the ground. How fast is it moving when it reaches the ground
Camera lenses are described in terms of their focal length. A 50 mm lens has a focal length of 50 mm, Locate the position of the image
sometimes a person cannot clearly see objects close up or far away. to correct this type of vision bifocals are often
Calculate the magnitude of the angular momentum of the Mars in a circular orbit around the sun. The Mars has mass 6.42×1023kg , radius 3.40×106m , and orbit radius 2.28×1011m .
LC oscillators have been used in circuits connected to loudspeakers to create some of the sounds of electronic music. which is in the audible range of frequencies
A small 2 g bullet moving at V0= 2000 m/s, inbeds itself in a 1kg block at the top of an inclined plane with an angle of θ= 450. The combined system then becomes a projectile, landing on the ground 10 m below the top of the incline. Calculate the f..
The electric field on the axis of a uniformly charged ring has magnitude 360 kN/C at a point 5.6cm from the ring center. Find the ring's charge
Light passes through a 200 line/mm diffraction grating and is observed on a 1.0 m-wide screen located 1.0 m behind the grating. What are the minimum and maximum possible values of wavelength
IO is a moon of jupiter, with a mass M= 8.9X10^22 kg, and radius of 1820Km. What period will this satellite have
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