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How much horizontal pushing force is necessary to hold a block of mass m = 22 kg against a vertical wall without it falling down? The wall/block interface has a coefficient of static friction of ?s = 0.4.
A hockey player strikes a 166 g puck, accelerating it from rest to 48 m/s. If the hockey stick is in contact with the puck for 2.5 ms, what is the average force applied by the stick?
What should the charge (sign and magnitude) of a particle of mass 1.47 be for it to remain stationary when placed in a downward-directed electric field of magnitude 610.
A box slides down a 40° ramp with an acceleration of 1.260 m/s2. Find out the coefficient of kinetic friction between box and ramp.
How numerous atoms does each hand contain
A highway is to be built between two towns, one of which lies 42.0 km south and 76.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed?
A pulsed carbon dioxide laser has an energy output of 1.00 J. This energy is released in the form of a 10^9 W pulse of infrared radiation lasting 10^-9 s, Find the equivalent capacitance of the network
During the late 19th and early 20th centuries, direct observations showed that a glacier in Switzerland flowed forward in the downhill direction while its snout (terminus) was retreating higher up the valley? Which of the following describes these..
If the mass of the rotor is 4.80 kg and it can be approximated as a solid cylinder of radius 0.0710 m, throughout how various revolutions will the rotor turn before coming to rest.
A tsunami is generated by an earthquake off the coast of Alaska. It has a wavelength of 677 km. It travels at a distance of 3536 km in a period of 5.49 hr. What is the frequency of the wave in Hz?
A car of mass = 800 travelling at 45.0 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and the car's tires. What is the radius of the turn if = 20.0 (Assume the car continues in unif..
Two identical metallic blocks are connected by a light spring having the spring constant 100 N/m and an unstretched length of .30 m. A total charge Q is slowly placed on the system, causing the spring to stretch to an equilibrium length of .40 m. ..
How much sound power will strike the eardrum of an airport worker 15.3 m from the aircraft? (Use 1.9 10-2 m as the diameter of the ear.)
Using Einsteins formula
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