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A parallel plate capacitor is constructed with Teflon(dielectric constant is 2.1) between the plates. This 12.6 muF capacitor has been charged to 1.5 volts. What charge is stored on the plates?
a falling rubber ball bounces off the floor. the velocity just before it hits the floor is Vi= (2.7m/2) x + (5.2m/s)y. what is the change in momentum of the ball from just before to just after it is in contact with the floor
A 50 g ice cube floats in 200 g of water in a 100 g copper cup; all are at a temperature of 0°C. What is the mass of the lead
A boat is to cross a river on a course directed 20.0° north of east in 10 minutes from point A to point B. The distance from point A to point B is 815m. If the river flows at a speed of 3.0 km/hr, at what angle upstream must the boat be headed,..
Tam walks with the velocity of 1.8 m/s west. He does so while riding on a conveyor belt that moves at a velocity of 0.7 m/s west. What is Tam's velocity.
A wheel of diameter 5.8 cm has a 4 m cord wrapped around its periphery. Starting from rest, wheel is given a constant angular acceleration of 4.9 rad/s2. How much time it will take for the cord to unwind.
The string in a yo-yo is wound around an axle of radius 0.531 cm. The yo-yo has both rotational and translational motion, like a rolling object, What is the speed of the yo-yo when it reaches the distance of 1.42 m
A 70.0 football player is gliding across very smooth ice at 2.25 . He throws a 0.470kg football straight forward. What is the player's speed afterward if the ball is thrown at 16.5 relative to the ground
(a) Three point charges, A = 2.2 µC, B = 7.5 µC, and C = -3.9 µC, are located at the corners of an equilateral triangle. Find the magnitude and direction of the electric field at the position of the 2.2 µC charge.
As part of a safety investigation, two 1800 cars travelling at 18 are crashed into different barriers. Find an average forces exerted on (a) car that hits a line of water barrels and takes 1.80 to stop, and (b) car that hits a concrete barrier and ta..
An electron and a positron each have a mass of 9.11 x 10-31 kg. determine the energy of the electromagnetic radiation
q1. the driver of a 1700 car travelling on a horizontal road at 140 suddenly applies brakes. due to the slippery
Two polarizers are oriented at 30.0 degrees to one another. Light polarized at a 15.0 degree angle to each polarizer passes through both
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