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A charge of +3.3 micro-Coulombs is placed in a capacitor without a dielectric. It starts from rest and accelerates toward the negative plate. After it has traveled 309.2 cm, it is moving at 7.2 x 103 m/s. What is the magnitude (absolute value) of the surface charge density on the sheets in C/m2 if the mass of the charge is 3.2 kg? This can be done using electric force and constant acceleration, however, try this using concepts of potential and potential energy.
A tennis player receives a shot with the ball of mass 0.060kg travelling horizontally at v=43 m/s and returns the shot with the ball travelling horizontally at 60.00 m/s in the opposite direction.
You are doing exercises on a Nautilus machine in a gym to strengthen your deltoid (shoulder) muscles. If you have set the tension in the cable of the machine to 33.0 N on each arm, what is the tension in each deltoid muscle if you hold your outstre..
a pair of hedge trimmers are 45 cm long from the pivot to the end of the handles. if the person applies of a force of
A pump is required to lift 800 kg of water (about 210 gallons)per minute from a well 14.0m deep and eject it with a speed of 18.0m/s. What must be the power output of the pump
If the engine absorbs 141.0 kcal of heat from the hot reservoir, how much does it exhaust to the cold reservoir
A ball is thrown from the brink of a cliff 15.0 m high with an initial velocity of v0 = 7.0 m/s at an angle q0 = 26.0 o above the horizontal. How long does it take to land
Randomly polarized light of intensity I0 is passed through two polarizers whose transmission axes differ by 45 degrees. What is the intensity of the light
A rectangular block of glass is totally immersed in water (n = 1.33). What is the refractive index of the glass
A wave on a string has a speed of 151 m/s. If the diameter of the string is increased by a factor of four and the tension is held fixed
The tires of a car make 62 revolutions as the car reduces its speed uniformly from 90km/h to 40km/h . The tires have a diameter of 0.86m. What was the angular acceleration of the tires
A motorcycle, which has an initial linear speed of 9.7 m/s, decelerates to a speed of 2.6 m/s in 3.6 s. Each wheel has a radius of 0.69 m and is rotating in a counterclockwise (positive) directions. What is (a) the constant angular acceleration (in r..
Eratosthenes measured the circumference of the Earth by noting that the Sun is at an angle of 7°12' = 7.2° ("one-fiftieth of a circle") south of the vertical in Alexandria at the same time of day, What was Eratosthenes percent error
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