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A swimmer, capable of swimming at a speed of 1.18 m/s in still water (i.e., the swimmer can swim with a speed of 1.18 m/s relative to the water), starts to swim directly across a 2.16-km-wide river. However, the current is 1.19 m/s, and it carries the swimmer downstream.
(a) How long does it take the swimmer to cross the river?
(b) How far downstream will the swimmer be upon reaching the other side of the river?
An electron acquires 7.45 x 10^-16 Joule of kinetic energy when it is accelerated by an electric field from plate A to plate B. Find what is the potential difference between the plates
A 1.0 kg stone is being whirles at constant speed of 12 m/s in a circle, held on a frictionless surface by a steel wire which is horizontal. The wire is 4.0 m long and its radius is 1.0 mm. Find out the strain in the wire.
Suppose a soccer player kicks the ball from a distance 21.5 m toward the goal. Find the initial speed of the ball
A small sphere of mass m= 7.60 g and a charge q1 = 29.9 nC is attracted to the end of a string, what is the smallest value d can have before the string breaks
A computer disk is 8.0 centimeter in diameter. A reference dot on the edge of the disk is initially located at θ=45 degree. Find the speed of the reference dot at t = 1.0 sec
Explain why the theorem of relativity predicts that no massive particle can be accelerated unto or beyond the speed of light (hint: recall the work-energy theorem)
How much force is required to hold a 7.20 cm diameter hose delivering 470 L/min by a 0.73rm cm diameter nozzle.
A fighter jet is launched from an aircraft carrier with the aid ofits own engines and a steam-powered catapult. The thrust of itsengines is 3.46 x 105 N. In being launched from rest itmoves through a distance of 69.6 m and has a kinetic energy of 6..
You are given a container with 5.0g of hydrogen atoms. What is the total charge on the electrons in the container? What is the total charge on the protons
An object is placed 5.5 cm in front of a converging lens with a focal length equal to 5 cm. Is the image real or virtual? Is the image upright or inverted? What is the position of the image?
A fish takes the bait and pulls on the line with a force of2.5 {\rm N}. What is the angular acceleration of the fishing reel
A deuteron particle (the nucleus of an isotope of hydrogen consisting of one proton and one neutron and having a mass of 3.34×10?27 kg) moving horizontally enters a uniform, vertical, How fast was this deuteron moving just before it entered the mag..
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