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A boat takes 3.30 hours to travel 40.0 km down a river, then 5.00 hours to return. How fast is the river flowing?
estimate the gravitational potential energy of the system relative to the lowest point of the motion when the cat is at its highest point.
Briefly describe: (a) Charging by friction (b) Charging by contact (c) Charging by induction *In one sentence if possible.
What are magnitude and direction of net electrostatic force
A duck has a mass of 2.1 kg. As the duck paddles, a force of 0.09 N acts on it in a direction due east, Find the magnitude and direction (relative to due east) of the displacement that the duck undergoes in 2.6 s while the forces are acting
A stone is projected at a cliff of height h with an initial speed of 45.0 m/s directed at an angle θ0 = 66.0° above the horizontal. The stone strikes at A, 5.37 s after launching. Find out (a) height h of the cliff, (b) speed of the stone just before..
A rescue helicopter is lifting a man (weight = 719 N) from a capsized boat by means of a cable and harness, What is the tension during the remainder of the rescue when he is pulled upward at a constant velocity
A 1.60m cylindrical rod of diameter 0.450cm is connected to a power supply that maintains a constant potential difference of 15.0V across its ends, Find the resistivity and for the material of the rod at 20 ?C
The electrical field within a continuous distribution of charge is given by the equation E= cxi+cyj+czk, Write the equation for E in terms of the position vector r
A jet is flying horizontally. when the plane is directly overhead at B, A person on the ground hears the sound coming from A. the average temperature of the air is 20 degrees celcius. if the speed of the plane at A is164 meters per second, what is..
A 5kg sphere moves at 20m/s makes a perfectly inelastic collision with a second sphere that is at rest. What is the mass of the second sphere
An important news announcement is trans- mitted by radio waves to people who are 122 km away, sitting next to their radios, and by sound waves to people sitting across the newsroom, 1.2 m from the newscaster. Take the speed of sound in air to be 345 ..
An object moves with constant acceleration 4.80 m/s2 and over a time interval reaches a final velocity of 12.6 m/s.
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