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One of our closest stellar neighbours.Vega is 5.8 light years away.it has been suggested that TV programs from our planet have reached this star and may have been viewed by the hypothetical inhabitants of a hypothetical planet orbiting this star. A TV station on earth has a power output of 1.0 GW. What is the intensity of its signal at Vega?
You measure an electric field of 1.37×106N/C at a distance of 0.159m from a point charge. What is the electric flux through the surface of a sphere
An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water, how much later do the second and third sounds arrive
The generator in an AC inductor circuit creates a maximum potential difference across the 2.74×10?3 H inductor of 243 V. What is the amplitude of the alternating current
A carpenter uses a tape measure to measure the lenght of one side of a room. However , a large bookcase on one side of the room prevents him from measuring the full lenghth. Is this random or systematic error
After a shipwreck, a solid steel spoon lies at the bottom of the ocean, 5.45km below the surface, What's the water pressure at that depth
Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is let go
q1. a lawn roller is rolled across a lawn by a force of 128 n along the direction of the handle that is 16.1 above the
You have 30 tuning forks that oscillate at close but different frequencies. What are the minimum number of different beat frequencies you can produce by sounding the forks 2 at a time
find the magnitude and direction of the field at this point.
The left end of a long glass rod 15.0 cm in diameter has a convex hemispherical surface 7.50 cm in radius, Determine the position of the image if an object is placed in air on the axis of the rod
a heat engine expels its waste at 300 C and has a carnot efficency of 25% without changing its intake temprature. What the temprature of the cold reservoir
A satellite is placed in orbit 9.00 105 m above the surface of the planet Jupiter. Jupiter has a mass of 1.90 1027 kg and a radius of 7.14 107 m. Find the orbital speed of the satellite
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