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Two identical pith balls are hung by insulating strings, touching each other, as in the picture below. The mass of each ball is 0.002kg. The strings are 28cm long. The two balls, while touching each other, are touched simultaneously to a charged rod. After they are touched by the rod, they move apart. The angle between the strings is eight degrees, as shown in the diagram below. Determine the charge on each ball. Show your work and explain your reasoning.
Water flowings through a 2.1 cm diameter pipe can fill a 400 L bathtub in 5.2 min. What is the speed of the water in the pipe
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 460 lines/mm , and the light is observed on a screen 1.7 m b..
A 36g glass thermometer reads 20.6C before it is placed in 104mL of water. What is the original temperature of the water
The temperature of the glass surface of a 30 W light bulb is 75°C when the room temperature is 10°C. Estimate the temperature of a 150 W light bulb with a glass bulb the same size. Consider only radiation, and assume that 90% of energy is emitted as ..
A spider has a mass of 0.70-g and is hanging from rest on a 20-cm long thread of 0.0020-mm diameter of silk, If the string is whirled in a circle at a rate of 2 revolutions per second, what is the minimum and maximum time for vibrational information..
LC oscillators have been used in circuits connected to loudspeakers to create some of the sounds of electronic music. which is in the audible range of frequencies
A 0.07-kg lead bullet traveling 296 m/s strikes an armor plate and comes to a stop. If all of the bullet's energy is converted to heat that it alone absorbs
A string of 13 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 63 W. What is the comparable resistance of light string.
Solve the algebraic expression by using power rules.
A 500g particle has velocity vx = -5.0m/s at t = -2s. Force Fx = (4-t^2)N is exerted on the particle between t = -2s and t = 2s. What is the particle's velocity at t = 2s
A merry-go-round (carousel) with a moment of inertia of 594 kg·m2, is initially rotating horizontally at 2 rad/s about a frictionless axis through its center. find that coefficient of kinetic friction
The huge volcanic eruption on the island of Krakatoa, Indonesia, in 1883 was heard on Rodrigues Island, How long did it take (in seconds) for the sound to travel to Rodrigues
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