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Suppose you are driving on the interstate at 88 mph when you see a highway patrol car parked up ahead. You apply your brakes, decelerating at a constant rate of 3.9 mph/sec until you have reduced your speed to 65 mph. You then maintain a constant speed of 65 mph. You pass the patrol car 17 seconds after you initially applied the brakes and are relieved that he doesn't pull out after you. How far away was the highway patrol car when you first saw it?
Sodium ions (Na+) move at 0.861 m/s through a bloodstream in the arm of a person standing near a large magnet. what would be the magnetic force on the arm
To hoist himself into a tree, a 72.0-kg man ties one end of anylon rope around his waist and throws the other end over a branchof the tree. determine the man's upward acceleration
What happens to support force on the workmens feet
A total of 2.99·106 electrons are placed on an initially uncharged wire of length 2.25 m. a) What is the magnitude of the electric field a perpendicular distance of 0.494 m away from the midpoint of the wire? b) What is the magnitude of the accele..
a 15.0-cm-iong solenoid with radius 2.50 cm is closely wound with 600 turns of wire. the current in the windings is
Three resistors, 20, 40, and 72 Ω, areconnected in series, and a 0.53-A current passes through them. What is the equivalent resistance?
You are required to build a 12 picofarad capacitor. If the plates can be only 2mm apart and circular, what is the radius of each of the plates
A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current. The current results because: pick the best answer? the coil acts like a transformer.
A long hollow cylinder has an inside radius a, an outside radius band is uniformly charged with a uniform charge density ρ. What is the electric field as a function of radius r? Includeanswers for r b.
an aluminum rod has a resistance of 3.30 ? at 20.0degc. calculate the resistance of the rod at 120degc by accounting
To help prevent frost damage, fruit growers sometimes protecttheir crop by spraying it with water when overnight temperaturesare expected to go below the freezing mark. How much heat is released by the water when it freezes
In a test run,a certain car accelerates uniformly from zero to 20.2m/s in 2.95s. How long does it take the car to change its speed from 10.01m/s to 20.02m/s
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