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A 66 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 15° above the horizontal.
(a) If the coefficient of static friction is 0.51, what minimum force magnitude is required from the rope to start the crate moving? N
(b) If µk = 0.36, what is the magnitude of the initial acceleration of the crate?
A boat has a mass of 5220 kg. Its engines generate a drive force of 4480 N due west, What is the boat's acceleration
The overall magnification of an astronomical telescope is desired to be 26 Ã?. What is the overall length of the telescope when adjusted for use by the relaxed eye
An iron casting containing a number of cavities weighs 23137.8 N in air and 19020.3 N in water. What is the total volume of all the cavities in the casting
Clarisse invests $61500 in money-market accounts at three different banks. Bank A pays 2% interest per year, bank B pays 2.5%, How much did she invest in each bank
Suppose that the net horizontal force is as a result of rolling friction only and take the free-fall acceleration to be g = 9.80 m/s^2.
In the Bohr model of the hydrogen atom, an electron in the 6th excited state moves at a speed of 6.08 104 m/s, What is the effective current associated with this orbiting electron
A box weighing 250-N is supported by the cable; the tension in the cable is 120-N. How much time elapses as box falls (starting from rest) 15.0 m.
An asteroid with a rest mass of 8.2 1011 kg is observed to have a relativistic momentum of magnitude 4.54 1020 kg · m/s
An observer, whose eyes are 1.77 m above the ground, is standing 28.0 m away from a tree. The ground is level, and the tree is growing perpendicular to it. The observer's line of sight with treetop makes an angle of 22.0° above the horizontal. How..
W hat least energy an incident alpha particle must have to penetrate the gold nucleus. What is the direction of the carbon atom after the collision.
What is the frequency of the small axial oscillations that the electron will undergo if it is free along the z-axis near the origin.
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? plan a ray diagram to support your answer.
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