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A 3.0-kg block is dragged over a rough horizontal surface by a constant force of 16 N acting at an angle of 37° above the horizontal as shown. The speed of the block increases from 4.0 m/s to 6.0 m/s in a displacement of 5.0 m. What work was done by the friction force during this displacement?
A centrifuge is rotating at 10,000 revolutions/minute. It is brought to rest in 4.00 seconds under a constant acceleration. Determine the initial angular velocity of the centrifuge in rad/sec
What is the angular speed of the rod after the rings leave it?
the nuclei of the hydrogen and chlorine atoms in an hcl molecule are 0.13 nanometer nm apart. how far from the nucleus
A new record for running the stairs of the Empire State Building was set on February 3, 2003. If the height gain of each step was 0.20 m , and the mass of the runner was 72 kg, what was his average power output during the climb
A 10.0 kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s. What is the speed of the crate when it arrives at the lower surface
A wing produces lift by diverting the flow of air, producing higherpressure below the wind and lower pressure above the wing. Find thelift produced by an airplane wing having an area of 30 squaremeters if the air velocity over the uper and lower s..
Two identical +9.5uC point charges are initially 3.5cm from each other. If they are released at the same instant from rest, hoe fast will each be moving when they are very far away from each other? suppose they have identical masse of 1mg.
At 273 K and 1.00 x 10-2 atm, the density of a gas is 1.24 x 10-5 g/cm3. Determine the Molar Mass of the gas and also Identify the gas
a styrofoam ball of mass 0.120 g is placed in an electric field of 6000 nc pointing downward. what charge must be
In a Compton scattering experiment, an electron is accelerated straight ahead in the same direction as that of the incident X-ray photon. Which way does the scattered photon move? Describe your reasoning, using the principle of conservation of moment..
The membrane that surrounds a certain type of living cell has a surface area of 4.4 x 10-9 m2, The potential on the outer surface of the membrane is +52.2 mV greater than that on the inside surface. How much charge resides on the outer surface
a frictionless inclined plane with angle of inclination theta is fixed to the floor of a train car accelerating in the
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