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A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -42 µC. How many excess electrons does she get, and by how much does her mass increase?
Explain eBay's marketing mix. Explain how does this mix differ from that of a more traditional, "brick and mortar" discount store?
Two children, Mary and Kate, are riding on a merry-go-round. Mary is at a greater distance from the axis of rotation than Kate. Which child has the larger angular speed? Tangential speed? Centripetal acceleration?
What was Larry Cuban and David Tyack supposition and purpose of education? Write down the similarities and difference.
Find the probability taht exactly 6 are satisifed with the airlines. Find the probability that fewer than 4 are satisfied with the airlines. Find the probability that 5 or more are satisfied with the airlines. Find the probability that between 3 a..
Why does a shirt or blouse taken from a clothes dryer sometimes cling to your body?
A newly issued 20-year maturity, zero-coupon bond is issued with a yield to maturity of 8% and face value $1000. Find out the imputed interest income in the first, second and last year of the bond's life.
If you charge a pocket comb by rubbing it with a silk scarf, how can you determine if the comb is positively or negatively charged.
A rock is released from rest into water. The magnitude of Fd of the drag force acting on the rock due to its motion through water can be modeled as Fd = Cd(v), where v is the speed of the rock and Cd is the constant drag coefficient. Determine the..
illustrate what you think is most important. Be certain to make explicit all criteria used in making your choice and all radio stations considered. Defend your response.
What is the probability that at least one inspector will find a defective widget?
A tennis ball is thrown toward a vertical wall with a speed of 22.0 m/s at the angle of 40.0° above the horizontal. The horizontal distance between the wall and the point where the tennis ball is released is 28.0 m.
find static friction between the chair and the floor.
Charge is scattered uniformly throughout a long cylindrical shell of inner radius R and out radius 2R. At what radius is the electric field equal to one-half the value on the outer surface.
A generator uses a coil that has 140 turns and a 0.50-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. assume that each turn of the coil is a square (an approximation), find out the length of the..
A uniform density cube of mass m, side 2b, and center at C is placed on a fixed horizontal cylinder of radius r and center O in Earth's gravitational field.
Calculate the period T and the tension in the string F as a function of the angle. Compute the moment of inertia of this system for an axis that passes through the combined center of mass and is perpendicular to the plane of the rings.
The distance between two telephone poles is 48.0 m. while a 0.600 kg bird lands on the telephone wire midway between the poles, the wire sags 0.200 m. Draw a free-body diagram of the bird. (Do this on paper. Your instructor might ask you to turn i..
compass needle points 25 degrees E of N outdoors. However, as it is placed 17 cm to the east of a vertical wire inside a building it points 61 degrees E of N. What is the magnitude of the current in the wire? The earth field there is 0.50X10^-4 T ..
A man pushes on a piano with mass 180 {rm kg} so that it slides at constant velocity down a ramp that is inclined at 20.0^circ above horizontal floor. Overlook any friction acting on the piano.
A ranger in a national park is driving at 24.0 mi/h when a deer jumps into the road 270 ft ahead of the vehicle. After a reaction time of t, ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the greatest reaction tim..
What is kinetic energy of the shell
A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits other kid 2.4 away squares in the back, at a point 0.85 above the ground. What was the initial speed of the water.
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