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A small boat is headed for a harbor 30 km directly northwest of its current position when it is suddenly engulfed in heavy fog. The captain maintains a compass bearing of northwest and a speed of 9.8 km/h relative to the water. The fog lifts 3.0 h later and the captain notes that he is now exactly 3.6 km south of the harbor.(a) What was the average speed of the current during those 3.0 h?(b) What would its travel time have been if it had followed a straight course?
Two cars are traveling along a straight-line in the same direction, the lead car at 25.0 m/s and the other car at 36.0 m/s. How much time does it take for the chasing car to stop
The nucleus of radioactive polonium-210, with a mass of about 3.49?10?25kg , is known to decay by emitting an alpha particle with a mass of about 6.68?10?27kg. what is the recoil speed of the remaining nucleus
A 245 kg person lays on board that is supported only on the ends and that has a mass of 12.0 kg. what is the force on either side where the board is supported
Does the change in speed of the downward-moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations? Explain physically why it does or does not agree.
A 50 kg diver steps off a 10 m high platform and strikes the water below in 1.43 seconds. determine the average frictional force that stopped his motion while in the water
A particle with a charge of -60.0 nC is placed at the center of a nonconducting spherical shell of inner radius 20.0 cm, Calculate the speed of the proton
In a hydraulic system, the larger piston to be used to lift a 1670kg car has a diameter of 24.2cm, If instead compressed air at 115 psi of pressure is used, what is the largest mass car (in kg) that the system can lift
A particle with a charge of 4.10 is in a uniform electric field directed to the left. What work was done by the electric force
A movie camera with a (single) lens of focal length 70 mm takes a picture of a person standing 24 m away. what is the height of the image in millimeters on the film
Write six pages paper about Bassel equation illustrating that with filter examples.
Keilah, in reference frame S, measures two events to be simultaneous. Event A occurs at the point (37.0 m, 0, 0) at the instant 9:00:00 Universal time on January 15, 2010. What time interval elapsed between the events
Evaluate how much work is done (including the algebraic sign) if the gas then expands from 4.0 10-3 to 6.0 10-3 m3 under isobaric conditions?
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