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1) A charge is placed at x = 0 meters and another charge of 8 micro-coulombs is placed at x = +4.2 m (both on the x axis). The total electric field produced by these two charges is zero at x = +2.3 meters. Then the charge at x = 0 m, switches sign but its magnitude is not changed. Where on the x axis (x = ____ m), is the total electric field equal to zero now? Answer in meters.
When the speed of the turntable is slowly increased, find the number of revolutions per minute at which the object just starts to slide off
question a healthy heart pumps about 70 ml of blood in one heart beat. the average pressure exerted is about 100 mm-hg
The blood speed in a normal segment of a horizontal artery is 0.11 m/s. An abnormal segment of the artery is narrowed down by an arteriosclerotic plaque to one-fourth the normal crosssectional area. What is the difference in blood pressures between t..
A plastic cylinder of length 36 cm its ends ground to convex (from the rod outward) spherical surfaces, each having radius of curvature 16 cm. How far will the image of the object lie from the right end
A kid slides down from the top of a 3m high frictionless slide. When he reaches the bottom of the slide, he travels over a 2m long carpet with a 0.20 coefficient of kinetic friction, What height does he return to on the slide
Visitors at a science museum are invited to sit in a chair tothe right of a full-length diverging lens (f1 = -2.60 m)and observe a friend sitting in a second chair, 1.90 m to the leftof the lens. The visitor then presses a button and a converginglen..
A molecule of a mass m and velocity v strikes a wall and is reflected maintaing the same speed. What is the magnitude of the impulse imparted by the wall to the molecule
Standing on a sidewalk, you notice that you are halfway between a clock tower and a large building. When the clock strikes the hour, you hear an echo of the bell 0.8 s after hearing it directly from the tower. How far apart are the clock tower and th..
Consider a bird that flies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W, How far will the bird fly before feeding again
A 0.15 kg particle moves along an x axis according tox(t) = - 14 + 2 t + 5 t2 - 4t3, with x in meters and t in seconds. What are projections of the net force acting on the particle at t = 3.4 s on(a)x-axis,(b)y-axis,(c)z-axis?
Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly ten months, how fast must you travel
A 9.5 gram bullet hits a 5.4 kg block in collision as shown in the figure such that the block is free to rotate as a pendulum. what would be the final height of the block
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