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On a workday the average decibel level of a busy street is 78 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 30 every minute on a weekend, what is the decibel level of the street?
Find the wavelength of red light in glass if the index of refraction of glass is 1.66. Recall that the wavelength of red light in a vacuum is 700 nm
A basketball star covers 2.6 m horizontally in a jump to dunk the ball. His motion through space can be modelled precisely as that of a particle at his center of mass. His center of mass is at elevation 1.02m when he leaves the floor. It reaches a..
In a closed circuit (that consists of a electric heater, a metal conducting rod, and two rails), it must have an outside force applied to keep the rod moving at a constant speed. What is the velocity of the moving conducting rod
A dolphin wants to swim directly back to its home bay, which is 0.760 km due west. It can swim at a speed of 4.23 m/s relative to the water, What direction should the dolphin head
.A cosmic-ray proton in interstellar space has an energy of 10.0 MeV and executes a circular orbit having a radius equal to that of Mercury’s orbit around the Sun (5.80 m). Illustrate what is the magnetic field in that region of space?
You have a 208%u2212%u03A9 resistor, a 0.400%u2212Hinductor, a 4.91%u2212%u03BCF capacitor, What will be the current amplitude at this frequency
a 15kg block is accelerated at 2.4m/s^2 up a frictionless plane inclined at 5 degrees to the horizontal, wth the speed increasing from 10m/s to 35m/s. what is the change in the blocks mechanical energy
a cylindrical resistor of radius 1.0 mm and length of 1.0 cm has resistance of 10 ohms. calculate the uniform current density in the resistor when the power of the resistor is 1 watt
A person with mass m1 = 60 kg stands at the left end of a uniform beam with mass m2 = 107 kg and a length L = 3.5 m. What is the location of the center of mass of the system
A certain ideal gas has a molar specific heat at constant volume CV = 7R/5. What is its molar specific heat at constant pressure
The first skater carries a 2-m pole that may be considered massless. As he passes the pole, What is the angular speed after the skaters are linked together
Students in a physics lab are to determine the specific heat of copper experimentally. They place 0.150 kg of copper shot into boiling water, what is the specific heat of copper
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