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A surface is so constructed that, at all points on the surface, the vector points outward. Therefore, it can be said that
A. the surface encloses a net positive charge.
B. the surface encloses a net negative charge.
C. the surface encloses zero net charge
D. the surface vector at all points on the surface is necessarily parallel to the electric field vector.
E. the surface vector at all points on the surface is necessarily perpendicular to the electric field vector .
A hiker, who weighs 919 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4410 N, and rests on two concrete supports, one on each end. He stops 1/3 of the way along the bridge.
A rocket has a mass of 1.2kg and is acted upon by an impulse from the engine of 130.5 N s during the 2 seconds the engine is firing. Determine the average net force acting on the rocket while the engine fired?
It has been suggested that we should use our power plants to generate energy in the off-hours (such as late at night) and store it for use during the day. What length of flywheel would you need in that case
You are on a spaceship that has discovered a giant artifact made by an alien civilization. what is the magnitude of the force of gravity on your ship from the semi-circle
question a electric wire with 3.85a current is placed in a magnetic field of strength .97 t. the .54m long wire makes
An oil droplet with 15.0 excess electrons is observed between two parallel electrodes spaced 14.0mm apart. What is the radius of the droplet
a 1600 kg car is traveling with a speed of 10 m/s. the driver slams on breaks, which give a force of 800 N. How far does the car go before reaching a halt
assume it takes 7.00 minutes to fill a 30.0-gal gasoline tank.a. calculate the rate at which the tank is filled in
A wave has a speed of 500.0 m/s and a wavelength of 4.9 m. What is the frequency of the wave? What is the period of the wave?
In 2.0 minutes, a ski lift raises six skiers at constant speed to a height of 175 m. The average mass of each skier is 65 kg. Illustrate what is the average power provided by the tension in the cable pulling the lift?
Two steel wires of the same length, one with radius r and the other with radius 2r, are connected together, end to end, and tied to a wall. How far does the point where the two wires meet move
Batteries are rated in terms of ampere-hours (A · h). For example, a battery that can produce a current of 2.00 A for 3.00 h is rated at 6.00 A · h. At $0.0830 per kilowatt-hour, what is the value of the electricity produced by this battery
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