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A hopper drops gravel at a rate of 75kg/s onto a belt that moves by constant velocity v=2.2m/s. What is the additional force (over and above internal friction) required to keep the conveyor belt moving as gravel falls onto it?
An electric heater carries a current of17.5A when operating at a voltage of 120 V. What is the resistance of the heater?
A proton having an initial velocity of 17.2i hat bold Mm/s enters a uniform magnetic field of magnitude 0.360 T with a direction perpendicular to the proton's velocity. Determine the distance the proton traveled in the field
The vapor pressure of water at 10 °C is 1300 Pa. (a) what percentage of atmospheric pressure is this? Take atmospheric pressure to be 1.013 × 105Pa. (b) what percentage of the total air pressure at 10 °C is due to water vapor when the relative humidi..
a drop of liquid of refractive index 1.58 is placed between a plano-convex lens and a plane glass plate which rests on
A 4.0- m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall, What is the tension in the wire if the iron bar weighs 300 N and the wire is 5.0 m long
A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction is -6.0 15) x 103 J, what is the speed of the skier
A rifle with a weight of 30 N fires a 3.0-g bullet with a speed of 240 m/s, Find the recoil speed of the rifle
Material found with a mummy in the arid highlands of southern Peru has a 164C activity/g of Carbon that is 78.5% of the activity present initially. How long ago (in years) did this individual die
a 14700n car is traveling @ 25m/s. the brakes are applied suddenly, and the car slides to a stop the average braking force between the tires and the road is 6980n. how far will the car slide once the brakes are applied
a 1950-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car
You have a 1.0m long copper wire. You want to make an N-turn current loop that generates a 1.2mT magnetic field at the center when the current is 2.5A. What will be the diameter of your coil
The three charged particles in the figure below are at the vertices of an isosceles triangle (where d = 1.60 cm). Taking q = 8.20 µC, calculate the electric potential at point A
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