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A mass of 8 kg lies on a horizontal surface with friction, initially at rest. The coefficient of static friction is 1.46 and the coefficient of kinetic friction is 0.55. One force of 32 Newtons is applied to it upwards (in +y direction). If a force is applied parallel to the surface (in +x direction), what is the minimum force needed to begin to move the mass? Answer in Newtons.
A weight lifter pushes dumbbells of total mass 20 kg upward with a force of just a little more than the weight of the dumbbells a distance of 1.2 meters. how many repetitions does he have to do
a 40 g block of of ice is cooled to -72 C and then is added to 650 g of water in an 80 g copper calorimeter at a temperature of 24C, determine the final temperature of the system consisting of the ice
three capacitors of capacitances 2 pf 3 pf and 4 pf are connected in parallel.a what is the total capacitance of the
A baseball approaches home plate at a speed of 46.0 m/s, moving horizontally just before being hit by a bat. What is the average vector force the ball exerts on the bat during their interaction
An electron passes through a point 3.27 cm from a long straight wire as it moves at 37.3% of the speed of light, Find the magnitude of the electron\'s acceleration at that point
At the moment, you are driving on a straight stretch of road at a constant speed of 60 mi/hr. You wonder what the corresponding angular velocity is for your wheels.
A long horizontal wire carries a current of IT = 46.9 A. A second wire (I), made of 3.00 mm diameter copper wire and parallel to the first but L = 13.8 cm below it, What is the current in the lower wire
A girl sits fixed on a merry-go-round of mass M = 500 kg and radius R = 2 m. The merry-go-round is at first at rest and is free to rotate without friction.
a proton is located at the origin and a second proton is located on the x-axis at x 6.80 fm 1 fm 10-15 m.a calculate
A ball is dropped from the top of a 46.0m -high cliff. At the same time, a carefully aimed stone is thrown straight up from the bottom of the cliff with a speed of 26.0m/s. How far above the base of the cliff does this happen
For silver electrode (hint: click just below the word "cesium"), what is the highest energy of an electron ejected by light of 250 nm.
If the spring stretches by 2.4cm, what is the coefficient of static friction between the backpack and the table.
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