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Q. A physics book slides off a horizontal table top with a speed of 1.20 . It strikes the floor after a time of 0.410 . Ignore air resistance.Find the height of the table top above the floor.
Q. A civil engineer has to desing a road in which ther is a curve with a radius of 300m. The road will have a maximum speed limit of 110km per hour. At what angle should the road bank on the curve so that no frictional force is needed by a vehicle travelling around the curve at the speed limit.
What is the frequency of up and down oscillations of the wheel? Regard wheel as a mass on one end of a spring and regard the body of the car as a fixed support for the other end of the spring.
A 246 kg wooden raft floats on a lake. When a 80kg man stands on the raft, it sinks 4cm deeper into the water. When he steps off, the raft vibrates for a while.
A shoe store uses small floor-level mirrors to let customers view prospective purchases. At what angle from vertical must such a mirror be inclined so that a person standing 59 from the mirror with eyes 142 off the floor can see her feet.
define How long are the skid marks. calculate the time it takes the sled to go 21 m down the slope.
A particle has a charge of 600 o C and a mass of 0.6 nkg. This particle is placed in a uniform electric field of 1,200 N/C. Find the a) electrostatic force acting on the mass. If the particle is free from rest what is its acceleration.
What is the minimal mass of helium (density 0.18) needed to lift a balloon carrying two people in a basket, if the total mass of people, basket, and balloon (but not gas) is 320.
How much energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175celsious? assume that their initial temperature is 21 celsious, that specific heat capacity of popcorn is 1650 j/kgcelsious, and ..
A radio telescope, whose two antennas are separated by 55 , is designed to get 3.0- radio waves produced by astronomical objects.
A bead with a mass of 0.02 g and a charge of 20nC is free to slide on a vertical rod. At base of the rod is a fixed 20nC charge.
Express how unmet basic physiological needs of oxygen, nutrition, temperature, and humidity threaten clients' safety.
Just by the impact, the clay has speed v0 = 9 m/s, and the disk is rotating clockwise with angular speed w0 = 0.4 rad/s. Just following the impact, what is an angular speed of the combined system of wheel plus clay.
A circular coil enclosing an area of 96 cm2 is made of 199 turns of copper wire. The wire making up the coil has resistance of 3.0 , and the ends of the wire are linked to form a closed circuit.
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