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A radio antenna broadcasts a 1.0 MHz radio wave with 29 kWof power. Assume that the radiation is emitted uniformly in all directions. (a) What is the wave's intensity 35 km from the antenna? I=___?___W/m^2 (b) What is the electric field amplitude at this distance? E=___?___ V/m
An electron in a picture tube moves with an acceleration of 7.0 × 1016 m/s2. What is the magnitude of the electric field in the tube
q1. an object is 14.4 cm from the surface of a reflective spherical christmas tree ornament 8.04 cm in diameter.what is
In two different cases, two blocks are sliding to the right across a horizontal surface. In Case A the mass of each block is 3.9 kg. determine the magnitude of the acceleration of the blocks
A wheel rotating about a fixed axis through its center has a constant angular acceleration of 4 rad/s^2. In cerain 4s interval the wheel turns through an angle of 80 rads.
The company's tax rate is 30% and its discount rate is 15%. Illustrate what is the net present value of the asset?
The second harmonic sinusoidal standing wave in a pipe with both ends open has a wavelength of 2m. The sound speed is 340 m/s. What is the frequency of the fundamental mode in this pipe
The two masses in the Atwood's machine shown in the figure have an initial speed of = 0.25 , and is moving upward. How high does rise above its initial position
A heat engine is to be built to extract energy from the temperature gradient in the ocean. what is the maximum efficiency such an engine can have
Two infinite parallel plates separated by distance S are at potentials 0 and V0. What are the charge densities on the plates
Three equal point charges, each with charge 1.65 , are placed at the vertices of an equilateral triangle whose sides are of length 0.500 . What is the electric potential energy of the system
The world consumes energy at the rate of about 456 per year, where the joule is the SI energy unit. estimate the average per capita energy consumption rate in watts
Water at a pressure of 4 atm at street level flows into an office building at a speed of 0.7 m/s through a pipe 5 cm in diameter. Calculate the water pressure in such a pipe on the top floor
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