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A crate, mass = 60 kg, is pulled along a horizontal surface with a coefficient of kinetic friction ?= 0. 2 by a rope which makes an angle of 53 degrees with the horizontal. The tension in the rope is 400 N. What is the acceleration of the crate?
A parallel-plate capacitor is to be constructed by using, as a dielectric, rubber with a dielectric constant of 3.20 and a dielectric strength of 25.0MV/m. find the minimum area the plates of this capacitor can have
A rope is used to pull a 2.72 kg block at constant speed 6.90 m along a horizontal floor. What are the work done by the ropes force
suppose that the gold ions carry one elementary unit of positive charge.
The arm of a person weighs 41.5N, which acts at the center of mass that is located 29.0cm from the rotation point in the shoulder. What is the force required by the deltoid muscle, Fd, to hold the arm parallel to the floor
A man seeking to set a world record wants to tow a 104000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. find the greatest acceleration the man can give the airplane
A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a string tightly wind around the inner core. What is speed of the top point of spool
A 120-V motor has mechanical power output of2.10hp. It is84.0%efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
A thin layer of fluid to be identified by its index of refraction is poured into a very shallow container. what are the possible values for the index of refraction
Consider a 3.0 ball and a 5.4 ball in free fall. what is the net force acting on each
two parallel infinite sheets carry positive unifrom surface charge densities sigma and 3 sigma. what is the magnetude of electrci field between the sheets
X rays diffract from a crystal in which the spacing between atomic planes is 0.193nm . The second-order diffraction occurs at 42.0?
If the heat necessary to warm 545 g of water from a temperature of T1 = 25.0 °C to T2 = 81.0 °C, what would be the speed of water
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