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A small plastic ball of mass 9.44 × 10-3 kg and charge +0.181C is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with the thread making an angle of 30.0o with respect to the vertical. The area of each plate is 0.01461 m2. What is the magnitude of the charge on each plate?
A 0.70 kg ball is moving horizontally with a speed of 7.7 m/s when it strikes a vertical wall. What is the magnitude of the impulse of the ball
On a cool morning, when the temperature is 14.0 ^circC, you measure pressure in your car tires to be 20.0 psi. After driving 40.0 mi on the freeway, the temperature of your tires is 50.0 ^circC.
An electric motor with a 2.7-hp output drives a machine with an efficiency of 35%. What is the energy output of the machine per second
In a Compton scattering experiment, an x-ray photon scatters through an angle of 17.0° from a free electron that is initially at rest. Calculate the angle through which the electron scatters
Image intensifiers used in night-vision devices create a bright image from dim light by letting the light first fall on a photocathode. If light of wavelength 720nm strikes such a photocathode, what will be the maximum kinetic energy, in eV, of the..
A landing craft approaches the surface of Penitgy, a planet in a far-away galaxy. The landing craft has two engines attached to the bottom, each angled 30 from the vertical. what is the mass of the landing craft
The yellow light from a helium discharge tube has a wavelength of 587.5 nm. calculate the number of lines per centimeter on the grating
A string length 2.0 m and linear mass density 25.0 mg/m vibrates at a fundamental frequency of 450.0 Hz. What is the speed of the transverse strin waves
Consider a person on the moon who launches herself into a satnding broad jump at 45 degrees. What is the range of the jump
A 1200kg car (A) traveling due north at 25m/s collides with a 2000kg truck traveling due west at 18m/s. What is the velocity of the wreckage just after the collison
A doubly charged helium atom whose mass is 6.6 * 10^- 27 kg is accelerated by a voltage of 2400 V. What is its period of revolution
q1. what are the average velocity and acceleration of the tip of an hour hand of a clock in the interval of noon to
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