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A radio antenna broadcasts a 1.0 MHz radio wave with 28 kW of power. Assume that the radiation is emitted uniformly in all directions.
What is the electric field amplitude at this distance?
E=___?____V/m
A satellites are placed in a circular orbit that is 3.64 × 107 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance
A telescope has an objective with a refractive power of 1.50 diopters and an eyepiece with a refractive power of 270 diopters
a 1cm high object is placed 20cm to the left of a converging lens f(focal length)=10cm. where is the final image and how high is it
Condensation occurs on a bathroom window at a rate of 0.5 kg per hour. If the bathroom air is at 26°C and fully saturated with water vapour, compute approximately, the rate of heat transfer onto the window surface if the inside surface is maintain..
The cheetah can reach atop speed of114km/h (71mi/h). While chasing its prey in a short sprint, find the cheetah's average acceleration during the short sprint
A dentist's drill starts from rest. After 3.20 s of constant angular acceleration it turns at a rate of 2.3 104 rev/min. Find the drill's angular acceleration
Calculate : a) the pressure at this depth b) the change in volume of the sphere do to the pressure GIVEN : density of copper = 8.9*10^3 kg/m^3 youngs modulus = 11*10^10 N/m^2
Neptune has a mass of 1.02 1026 kg and a radius of 2.48 107 m. Assume it is a uniform solid sphere. What is the rotational kinetic energy of Neptune on its axis
Write the Ampere's Law for a path that surrounds both conductors
Two freight cars, each with a mass of 2.4 multiplied by 105 kg, collide and stick together. One was at first moving at 3.4 m/s and the other was at rest. What is their final speed.
A 28-m3 tank is filled with 2910 moles of an ideal gas. The temperature of the gas is initially 302 K, but it is raised to 740 K. find the change in the pressure of the gas inside the tank
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). What is the speed at which the satellite travels
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