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A certain laboratory experiment requires an aluminum wire of length of 36.0 m and a resistance of 2.30 ? at 20.0°C. What diameter wire must be used? (The resistivity of aluminum at 20.0°C is 2.82 10-8 ? · m.)mm
the pericarppart of a popcorn kernel is a small container of liquid water. when the poppcorn is heated to about 180 degrees C, what is the change in entropy of the water due to the vaporization and expansion
A typical red blood cell subtends an angle of only 1.7×10?5rad when viewed at a person's near-point distance of 25 cm. find the magnitude of the angle subtended by the red blood cell
An electromagnet produces a magnetic field of 0.550 T in a cylindrical region of radius 2.40 cm between its poles. What magnitude of force is exerted on the wire
A 1000-kg sports car (including the driver) crosses the rounded top of a hill (radius = 90.0m ) at 22.0m/s. Determine the normal force exerted by the road on the car
A kangaroo can jump over an object 2.6 m high. Calculate its vertical speed when it leaves the ground
A storage tank 31 m high is filled with pure water. Calculate the magnitude of the net force that acts on a square access hatch at the bottom of the tank that measures 0.6 m by 0.6 m
A long, narrow, uniform tube of mass M and length l rotates freely about a perpendicular axis through its CM. What will the tube's angular velocity be when this happens
A 6.00 g bullet is fired horizontally at two blocks resting on a smooth tabletop, as shown in the top figure, find the speed of the bullet immediately after it emerges from the first block, find the bullet's original speed
A rifle bullet with mass 8.00g strikes and embeds itself in a block with a mass of 0.992 kg that rests on a frictionless, Find the magnitude of the block's velocity just after impact
A 9-g bullet is fired from a rifle. It takes 3.30 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
A box slides across a frictionless floor with an initial speed v = 2.5 m/s. It encounters a rough region where the coefficient of friction is µk = 0.1. find the shortest length of rough floor which will stop the box
A parallel plate capacitor has plates of area 2.0*10^3 and plate separation 1.0*10^4m. find the capacitance of this system if air fills the volume between the plates.
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