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1. Electrons leave the cathode of a TV tube at essentially zero speed and are accelerated toward the front by 10,000 V potential. At what speed do they strike the screen? Express this value as a fraction of the speed of light.
2. A charge of -4.00 μC is fixed in place. From a horizontal distance of 55.0cm, a particle mass 2.50 x 10^-3 kg and charge -3.00μC is fired with an initial speed of 15.0m/s directly toward the fixed charge. How far does the particle travel before it stops and begins to return back?
3. In the figure to the right, find the magnitude and direction of the electric field at points A, B,C and D.
4. In question 3, calculate the work needed to move a 1.5μC test charge from point B to point D.
5. A 15μ F capacitor is connected to a 55 V battery and becomes fully charged. The battery is removed and the circuit is left open. A slab of dielectric material is inserted to completely fill the space between the plates. It has a dielectric constant of 4.8. What is the voltage across the capacitor plates after the slab is in place?
A river 24.0 m wide and 5.0 m deep drains a 3000.0 km2 land area in which the average precipitation is 48 cm/year. What is the average speed of the river
The attenuation (intensity loss) of ultrasound in tissue is approximately 0.3 dB per MHz per cm of depth. (E.g., a 3 MHz signal travelling during 2 cm of tissue has its initial intensity reduced by 0.3×3×2 = ?1.8 dB.)
An electron is accelerated by a uniform electric field (1000 V/m) pointing vertically upward. determine the electrons velocity after it moves
The magnetic flux threading a metal ring varies with time t according to 3at^3-bt^2, with a = 7.7s^-3m^2T, and b = 2.8 s^-2m^2T. The resistance of the ring is 2.3 Ohms. Determine the maximum current induced in the ring during the interval from t1 ..
A 0.410 kilogram pendulum bob passes through the lowest part of its path at a speed of 3.00 m/s. Find the tension in the pendulum cable at this point if the pendulum is 80.0 centimeter long
q1. at one instant a bicyclist is 40.0 m due east of a parks flagpole going due south with a speed of 10.0 ms. then
A spacecraft of 140 kg mass is in a circular orbit about the Earth at a height h = 3RE. What is the spacecraft's kinetic energy
An 8.50kg point mass and a 15.0kg point mass are held in place 50.0 cm apart. Find the direction of the acceleration of the particle
Two identical wheels are moving on horizontal surfaces. The center of mass of each has the same linear speed. Determine the maximum height reached by each wheel as it moves up the incline
A massless spring with spring constant k is vertically mounted so that the bottom end is firmly attached to the ground, and the top end is free. A ball with mass m falls vertically down on the top end of the spring, becoming attached, so that the ..
water has a mass per mole of 18.0 g/mol, and each water molecule (H20) has 10 electrons. what is the net charge of all these electrons
A mass m = 3 kg is hanging from an ideal string which is passed over a fixed, frictionless pulley and then is attached to the upper end of a vertical spring whose lower end is fixed to the floor. What is the maximum stretch of the spring
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