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Estimate the average force exerted by a shot-putter on a 7.4 kg shot if the shot is moved through a distance of 2.5m and is released with a speed of 11m/s.
A quarterback makes a pass, throwing the ball at 22 m/s and an angle of 63° above the horizontal. What is the maximum height of the ball in flight
An 79 kg person is parachuting and experiencing a downward acceleration of 2.0 m/s2 shortly after opening the parachute. What upward force is exerted on the open parachute by the air
A man of mass 76.5 kg walks down the aisle of an airplane at a speed of 1.10 m/s in the forward direction while the plane moves at a speed of 280 m/s relative to the earth
A solid circular disk has a mass of 1.2 kg and a radius of 0.12 m. Each of three identical thin rods has a mass of 0.16 kg. Find the moment of inertia of the stool
A sample of an unknown substance appears to weigh 15.3 N in air and 9.16 N when immersed in a solvent with density 1.20 g/mL. Find the density and volume of the sample
In a physics lab experiment, a student immersed 201 one cent coins (each having a mass of 3.00) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.240 of water at 20 in an insulated contai..
A pipe with a diameter of 1m carries water at a pressure of 1000kPa and a speed of 6m/s. what will the pressure and speed be in the smaller diameter section of pipe
A 4-kg block lies on a horizontal table whose coefficient of friction is 0.3. A horizontal rope is redirected by a uniform solid disk (pulley) of mass 2 kg to a mass of 12-kg hanging off the table. How many revolutions does the disk of the pulley m..
Estimate the number of drops of water in all the oceans on earth. You will need to use the facts that the oceans cover about 2/3 of the earth's surface and are about 4000 m deep on average
A K+ ion and a Cl ion are directly across from each other on opposite sides of a membrane 8.9 nm thick. What is the electric force on the K+ ion due to the Cl ion? Ignore the presence of other charges. What direction will it go in relation to the ..
A 200-pound boy lifts a 40-kg box off of the floor 1.3 meters in 0.7 seconds. determine Which boy is more powerful
A capacitor is made from two hollow, coaxial, iron cylinders, one inside the other. The inner cylinder is negatively charged and the outer is positively charged; the magnitude of the charge on each is 10.0pCpC .
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