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A hunter wishes to cross a river that is 1.2 km wide and that flows with a speed of 3.0 km/h. The hunter uses a small powerboat that moves at a maximum speed of 11.2 km/h with respect to the water. What is the minimum time necessary for crossing?
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Question: In a science museum, a 110kg brass pendulum bob swings at the end of a 15-meter-long wire. The pendulum is started at exactly 8:00 a.m. every morning by pulling it to 1.5m the side and releasing it. Because of ...
Problem: A rotating platform of radius R = 4.2cm is initially at rest. It then begins to move, such that a point on its edgeexperiwnces a tangential acceleration of at = 7.5cm/s^2. A) Write an [expression] that gives the ...
Question: A softball pitcher throws an underhanded pitch with the arm fully extended (straight at the elbow). The ball leaves the pitcher's hand with a speed of 25 m/s. Assume that the pitching motion originates with the ...
Question: A slab of insulating material of uniform thickness d, lying between -d/2 to +d/2 along the x axis, extends infinitely in the y and z directions. The slab has a uniform charge density Ï. The electric field is z ...
Question: An object is 30 cm in front of a converging lens with a focal length of 10 cm. Use ray tracing to determine the location of the image. What are the image characteristics: (i) upright or inverted, (ii) magnifica ...
Question: A semicircle of radius a is in the first and second quadrants, with the center of curvature at the origin. Positive charge +Q is distributed uniformly around the left half of the semicircle, and negative charge ...
Question: A particle with a charge of ? 5.10nC is moving in a uniform magnetic field of B= -(1.25T)k. The magnetic force on the particle is measured to be: F = - (3.60*10^-7N) i + (7.60*10^-7N) j. Part A: Are there compo ...
Question 1: Rob was supposed to spend his two-week school work experience at his local auto-repair shop. Unfortunately, his time on the job only lasted two days. On day two, Rob was asked to get the 1-liter air tool oil ...
Problem: Suppose a point charge produces a potential of -1.8 V at a distance of 1.1 mm. What is the charge, in coulumbs, of the point charge? The response must be typed, single spaced, must be in times new roman font (si ...
Question: Suppose that there are two goods available to the consumer-pens and pencils. Suppose that the price of a pen is $2.00 while the price of a pencil is $0.50. If we measure the quantity of pens on the horizontal a ...
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