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A certain sound has an intensity of 9.195275×10-4 W/m2 2.33 m from its source. What is the power emitted by this source in watts? Express your result to three significant digits and in scientific notation. Hint: The area of a sphere is 4πr2
A string fixed at both ends is vibrating in its 8th harmonic. How many nodes are on the string
Find out a formula for a electrical flux on a sphere for a point charge at the center of the sphere with a hole in the sphere.
It is desired to construct a solenoid that will have a resistance of5.20(at 20°C) and produce a magnetic field of 4.00multiplied by10-2T at its center when it carries a current of3.40A. determine the length the solenoid should have
The earth orbits the sun in a nearly circular orbit of radius 1.49 x 1011 m. What is the acceleration of the earth
A ship of draft 10 m is loading in salt water density 1015 kg/m3. Calculate the cheng in draught on entering salt water of density 1025 kg/m3.
How might a magician make the Statue of Liberty disappear? Imagine that you are sitting with some spectators on a circular platform that, unknown to all of you, can rotate very slowly. It is evening, and you can see the Statue of Liberty a short dist..
Determine the mass of the Sun using the known value for the period of the Earth and its distance from the Sun
If the radius of the equipotential surface of a point charge is 25 meter and is at a potential of +1.50 kV (compared to zero at infinity), obtain the magnitude and sign of the point charge
Write the velocity and position as functions of time for car A. Write the acceleration, velocity, and position as functions of time for car B.
A flat surface with area 2.4m2 is in a uniform electric field of 820N/C. What is the electric flux through the surface when it is at right angles to the field
Assume The resistance per length of the wire is 0.089 Ω/m. When the magnetic field is 0.5 T, find out the magnitude of the current through middle leg PQ of the circuit.
solar cells can produce 39.8 w of electricity per square meter of surface area if directly facing the sun. how large an
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