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Two small metallic spheres, each of mass m = 0.192 g, are suspended as pendulums by light strings of length L as shown in the figure below. The spheres are given the same electric charge of 7.6 nC, and they come to equilibrium when every string is at an angle of = 5.45° with the vertical. How long are the strings?
When light is incident from air perpendicular to the surface of a certain medium, Find the speed of light in the medium
A bat moving at 2.3 m/s is chasing a flying insect. The bat emits a 51 kHz chirp and receives back an echo at 51.33 kHz, At what speed is the bat gaining on its prey
The skater farthest out has a mass of 58.0 kg and is 7.80 m from the pivot. He is skating at a speed of 6.40 m/s. Find out the magnitude of the centripetal force that acts on him.
A gas changes in volume from 0.870 m3 to 0.200 m 3 at a constant pressure of 1.30*105 Pa. How much work is done on the gas? How much work is done by the gas on its environment?
The resolving power of a microscope depends on the wavelength utilized. If one wished to "see" a particular type of molecule, a resolution of 1.2*10-10 m would be required.
A 150.0 g copper cylinder at 425.0 C is placed on a large block of ice at 0.00 C. Suppose that no energy is transferred to the surroundings. What is the mass of the ice that will melt?
The spin cycles of a washing machine have two angular speeds, 431rev/min and 622rev/min . The internal diameter of the drum is 0.440m. Find the laundry's maximum tangential speed
two football players interact on the field. one moving toward the right is carrying the ball and wants to cross the
A parallel-plate capacitor with plates of area 600 cm2 is charged to a potential difference V and is then disconnected from the voltage source. What is the charge Q on the positive plate of the capacitor
A 50g ball of clay traveling at speed v0 hits and sticks to a 1.0kg block sitting at rest on a frictionless surface. what os the speed of the brick after the collision
A capacitor consists of two parallel plates, each with an area of 17.0cm2 , separated by a distance of 0.150cm. How much energy is stored in the charged capacitor
What is the resultant displacement when a dog runs 36 m North, and then changes direction to run 13.6 m West? answer sketching diagram and showing all calculation.
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