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A firework rocket explodes at an altitude of 400m causing an average sound intensity of 6.7 x 10^{^-2} W/m^{2} at a point on the ground directly below it. What is the average intensity of the sound at the distance 10m from the rocket?
Two spherical objects with a mass of 8.05 kg each are placed at a distance of 2.31 m apart. How many electrons need to leave each object so that the net force between them becomes zero
An internal combustion engine with an initial temperature of 36.2 is started. The coombustion reactions add 8.66 x 10*6 J of energy as heat to the engine after several cycles. what is the final temperature of the engine
a charge of 25 nc is uniformly distributed along a circular arc radius 2.0 m that is subtended by a 90-degree angle.
What is the magnitude of the passenger's acceleration.
Two masses are suspended by a rope that passes over a pulley. Both the pulley and the rope have negligible mass and there is no friction in the pulley. Determine the acceleration of the system
Amber (n = 1.546) is a transparent brown-yellow fossil resin. An insect, trapped and preserved within the amber, How far below the surface is the insect actually located
a roach that runs for its life because you try to hit it with your physics book runs off the horizontal tabletop with a
q1. eight identical non-interacting particles are placed in a cubical box of sides l 0.2 nm.find the lowest energy of
You have to do 2.2 kJ of work to push a 78-kg trunk 3.1 m along a slope inclined upward at 22 degrees , What is the coefficient of friction between trunk and slope
A flat circular coil with 106 turns, a radius of 2.43 x10 -2 m, and a resistance of 0.328 Ω is exposed to an exterior magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at..
An electron that has energy of approximately8.0e+01 eV moves between rigid walls1.3 nm apart. Discover the precise energy of the electron. Discover the quantum number n for the energy state that the electron occupies.
determine the change in the internal energy of a system that absorbs 327 cal of thermal energy while doing 750 j of
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