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A solid, square pinewood raft measures 3.0 m on a side and is 2.30 m thick. What is the total mass of swimmers that the raft can carry and float by its top surface at water level? ________________kg
Two uncharged metal spheres, L and M, are in contact. Anegatively charged rod is brought close to L, but not touching it,as shown. The two spheres are slightly separated and the rod isthen withdrawn. As a result:
a runner with a mass of 60kg accelerates from 0 to 9 ms in 3 s. fin a runner with a mass of 60kg accelerates from 0 to
q1. a chair of weight 74.0 n lies atop a horizontal floor the floor is not frictionless. you push on the chair with a
consider a rotating bucket of water spinning with constant angular speed w. after the system stabilizes the water will
If you bring a negatively charged insulator near two uncharged metallic spheres that are in contact and then separate the spheres, what will be the charge of the right sphere
Force from crutches. A patient with a broken leg stands using a pair of crutches. The crutches support 75% of the 81 kg patient's weight. Find the force each crutch applies to the patient
A hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. Calculate the buoyant force exerted by the water on the sphere
Moist air at 12oC and 80% R.H. enters a duct at a rate of 150 m3/min. The mixture is heated until it exits at 35oC. The pressure remains constant at 100 kPa. Determine (a) the rate of heat transfer, and (b) the relative humidity at the exit.
An air puck of mass .29kg is tied to a string and allowed to revolve in a circle of radius 1.4m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of .7 kg is tied to it. The s..
A cosmic ray interacts for a mere 11fs with its detector. Having just learned about the uncertainty principle, Find the minimum uncertainty in that energy
A certain digital camera having a lens with focal length 7.5 cm focuses on an object 1.80m tall that is 4.35m fromt he lens. How far must the lens be from the photocells
A soccer player kicks the ball toward a goal that is 16.0 m in front of him, Find the speed of the ball when the goalie catches it in front of the net
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