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You are in the neighborhood of a star (radius of 700,000 kilometers) which has emitted so many protons ("solar wind") during its life, that it now possesses a huge net negative charge of 6 x 10^6 C (surface charge). You did not know the fact and launched a probe (100 kilograms) on an orbit around the star (circular orbit, with a radius of 100 million kilometers). Your probe is protected against heat, but not against being polarized by influence. For short, your probe has an extra (positive) charge of 1000 C. The new attraction force was not foreseen previously, and you must compensate it somehow, because otherwise the probe will fall into the star.One proposition is to use temporarily the engines of the probe against the star attraction, until you find a permanent solution.
A) What power must the engines of the probe use in order to maintain the orbit?
What is speed of the second train, which travels faster
questionan insulated thermos contains 149 g of water at 71 c. you place in a 10.7 g ice cube at 0 c to form a system of
THe magnetic dipole moment of Earth has a magnitude 8*10^22 J/T. Assume that this is produced by charges flowing in Earth's molten outer core, what is the current that the charges produce
The sound level measured in the room by a person watching a movie in a home theatre system varies from 63 dB throughout a quiet part to 92 dB throughout a loud part. In the order of how many times louder is the latter sound.
A small, 300g cart is moving at 1.40m/s on an air track when it collides with a larger, 5.00kg cart at rest. What is the speed of the large cart after the collision
A 10 kg weight is put on the weightless piston of the cylinder (20 cm in diameter) filled with oxygen gas (P=101.3kPa, V=1m^3). Calculate the volume of the compressed gas
A 10.00 m uniform beam is hinged to a vertical wall and held horizontally by a 5.00 m cable attached to the wall 4.00 m above the hinge, What is the heaviest beam that the cable can support with the given configuration
There are approximately 120 million TVs in the United States. Each uses, on average, 75 W of power, how much money is spent every day in keeping the TVs turned on
The football started on the ground 63yrds from the base of the goal posts and just barely cleared the 10ft high bar. How long after the ball was struck did it past through the goal posts
Illustrate what is the magnitude of the apparent weight of a 78kg astronaut 5200km from the center of the Earth's moon in a space vehicle moving at constant velocity?
Consider an LR circuit with a variable inductor and with deltaVs=150 V, f=60Hz, R=5 ohms. Calculate the power in the resistor
What is the net entropy change
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