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Particles approximately 3.0 X 10-2 cm in diameter are tobe scrubbed loose from machine parts in an aqueous ultrasoniccleaning bath. Above what frequency should the bath be operated toproduce wavelengths of this size and smaller?
When light of wavelength 303 nm falls on a potassium surface, electrons are emitted that have a maximum kinetic energy of 1.99 eV. What is the work function of potassium? The speed of light is 3 × 10^8 m/s and Planck’s constant is 6.63 × 10^?34 J · s..
what is the new force between the objects. if Andromeda contains roughly the same number of stars and attracts the Milky Way with a gravitational force of 2.4*10^30N.
Suppose that an insulating container of negligible mass contains 0.12 kg of water at a temperature of 4 degrees C. what is the final mass (in kg) of the water in the system
What is the minimum coefficient of friction between tires and road.
A hydrogen atom initially in the ground state absorbs a photon, determine the wavelength and frequency of the photon
A golf ball strikes a hard, smooth floor at an angle of ? = 32.4° and, rebounds at the same angle. What is the magnitude of the impulse applied to the golf ball by the floor
A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, for about 0.0038 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 2.5 102 ft/..
questiona baseball is hit with a speed of 30.0 ms at an angle of 43.0 degrees. it lands on the flat roof of a 12 meter
A circular loop of radius 11.8 cm is placed in a uniform magnetic field. what is the magnetic flux through the loop
Design an audio amplifier using a JFET and a 20-volt power supply. The amplifier is to have a gain of 50
A double-concave lens has equal radii of curvature of 15.1 cm. An object placed 14.2 cm from the lens forms a virtual image 4.94 cm from the lens. What is the index of refraction of the lens material
A 0.04 kg bullet collides in elastically with a 0.5 kg ballistic pendulum. Before the collision the pendulum was at rest but immediately after collision the pendulum is moving with speed of 13.6 m/s. How fast was the bullet travelling before the coll..
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