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Q. Two large, parallel, conducting plates are 26cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 2.8 x10-15 N acts on an electron placed anywhere between two plates.
Q. A stationary radar operator determines that a ship is 15km south of him. An hour later the same ship is 24km southeast. If the ship moved at constant velocity and always in the same direction, what was its velocity all through this time? (Hint: Take the origin to be the location of the radar.)
Sally travels by car from one city to another. She drives for 24 min at 63.0 km/h, 52.0 min at 42.0 km/h, and 18.0 min at 81.0 km/h, and she spends 5 min eating lunch and buying gas.
A sphere consists of a solid wooden ball of uniform density 800 and radius 0.20 and is covered with a thin coating of lead foil with area density 20.
A 40 percent efficient electric power plant produces 900MW of electric power and discharges waste heat into 30 C ocean water. Suppose the waste heat could be used to heat homes during the winter instead of being discharged into the ocean. A typical A..
A 1500 kg car traveling at a speed of 20 m/s skids to a halt on wet concrete where kinetic friction= 0.20. How far are the skid marks.
An 85 kg spacewalking astronaut pushes off a 655 kg satellite, exerting a 115N force for the 0.600 s it takes him to straighten his arms.
A cannonball shot with the initial velocity of 129 m/s at an angle of 36° follows a parabolic path and hits a balloon at the top of its trajectory. Neglect air resistance, how fast is the cannonball going as it hits the balloon.
A gymnast with mass m1 = 42 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 106 kg and length L = 5 m. Each support is 1/3 of the way from each end. at first the gymnast stands at the left end of..
James is scheduled for a job interview with Ms. Farrar. He knows that she is in charge of selecting, placing, and evaluating employees for her firm, but he cannot remember her educational background. Which is most likely Ms. Farrar's educational back..
Where can a third charge be placed. To what common temperature must the two pieces be heated in order that the cylinder just fit over the piston.
A 14 g bullet travelling at 247 m/s is fired into a 0.459 kg wooden block anchored to a 100 N/m spring. How far is a spring compressed to the nearest thousandth of meter.
The angular momentum of the electron as it moves around the center of the circle is 1.40 × 10-25J•s.Find the radius of the circular path.
How to calculate the efficient canyon albedo
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