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Two point charges lie on the x axis. A charge of +7.5 µC is at the origin, and a charge of -5.5 µC is at x = 10.0 cm. (a) What is the net electric field at x = -2.0 cm? (b) What is the net electric field at x = +2.0 cm?
A 9 ohm resistor are connected in series to a power supply. The voltage drop across the 6 ohm resistor is measured with a amphmeter and found to be 12.0 volts. what is the voltage setting of the power supply
What are the two types of errors one encounters in experiments? Give an example of each, What does standard deviation of measured data tell you
Model rocket engines are sized by thrust, thrust duration, and total impulse, among other characteristics, What is the average exhaust speed of the engine
A uniform 20m tall cylindrical tower of mass 2.0x10^4 kg, what force must be applied horizontally at the center of mass to just stop it toppling
One end of an insulated metal rod is maintained at 100 , while the other end is maintained at 0 by an ice-water mixture. Find the thermal conductivity of the metal
Brewed coffee is often too hot to drink right away. You can cool it with an ice cube, but this dilutes it. what is the final temperature of the coffee
A 1.50-kg iron horseshoe initially at 670°C is dropped into a bucket containing 22.0 kg of water at 26.0°C. What is the final temperature of the water–horseshoe system? Ignore the heat capacity of the container and assume a negligible amount of water..
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.650m from the axis of rotation of the stool. Compute the kinetic energy of the system after the dumbbells are pulled in
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 60.7 degrees. Find the the angle the resultant force makes with dog A's rope
A car is moving at 9 m/s along a curve on a horizontal plane with radius of curvature 46 m. The acceleration of gravity is 9.8. Find the rotational frequency of the wheel
Two long thin parallel wires 13.0 cm apart carry28-A currents in the same direction. Determine the magnetic field vector
A man is dragging a trunk up the loading ramp of a mover's truck. The ramp has a slope angle of 20.0degree, and the man pulls upward with a force of magnitude 385N whose direction makes an angle of 30.0 degree with the ramp.
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