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A 9.0 kg hanging weight is connected by a string over a pulley to a 5.0 kg block sliding on a flat table. If the coefficient of sliding friction is 0.20, find the tension in the string.
a. 19 Nb. 24 Nc. 32 Nd. 38 N
A 2.0 kg mass (mA) and a 5.50 kg mass (mB) are connected to a lightweight cord that passes over a frictionless pulley. The pulley only changes the direction of the force exerted by the rope.
In a pool game, the cue ball, which has an initial speed of5.0m/s, make an elastic collision with the eight ball, which is initially at rest. Find the direction of motion of the cue ball after the collision
An engine has a hot reservoir temperature of 969 K and a cold reservoir temperature of 602 K. The engine operates at two-fifths maximum efficiency. What is the efficiency of the engine?
Measurements with microelectrodes have shown that a 0.30-nm-diameter potassium ion(K+) channel carries a current of 1.8 pA, How many potassium ions pass through if the ion channel opens for 1.0 ms
Light from a helium-neon laser (? = 633 nm) passes through a circular aperture, What is the diameter (in mm) of the hole
a marble is thrown horizontally with a speed of 12.3 ms from the top of a building. when it strikes the ground the
If a 200 lb bungee jumper jumps from a bridge 150 ft and touches the top of the river. If the cord absorbs 14 percent of the energy how far will be man be at the Top of the next bounce from the river bottom.
Calculate the temperature at which a tungsten filament that has an emissivity of 0.50 and a surface area of 3.9 10-5 m2 will radiate energy at the rate of 35 W in a room
Sean is running a 100m dash. When the starter's pistol fires, he leaves the starting block and continues speeding up until he reaches his top speed of 11m/s 6s into the race. He holds this speed for 2s and then gradually slows down until he crosse..
The volume flow rate in an artery supplying the brain is 3.20 10-6 m3/s. If the radius of the artery is 6.00 10-3 m, determine the average blood speed
A large truck collides head-on with a small car. how do the forces acting between the truck and car compare during the collision
A carnot engine operates between a hot reservoir at 310 K and a cold reservoir at 280 K. If it absorbs 500 J of heat at the hot reservoir, how much work (in joules) does it deliver?
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