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Show all the work for the following1. The distance to Alpha Centauri is 4.26 lightyears. When Earth and Mars are nearest each other in their orbits, Mars is 25” (arcseconds) in diameter on the sky. What is the ratio of the size of Alpha Centauri’s parallax (as seen from Earth) compared to the apparent size of Mars at Earth’s closest approach?
2. On Earth it takes 6 months to measure the parallax of a star. Why? How much longer (in months) would it take to measure a star’s parallax from Mars?
3. Using the general parallax equation D = d/p, by what percentage would the parallax of ANY star change if we were to observe it from Mars instead of the Earth? Is this percentage larger or smaller than what is seen from Earth.
4. What is the parallax of Alpha Centauri (in arcseconds) as seen from Mars?
A conducting sphere that carries a total charge of -9.1 µC is placed at the center of a conducting spherical shell that carries a total charge of +1.7 µC. The conductors are in electrostatic equilibrium. Determine the charge on the outer surface o..
High-voltage power lines are a familiar sight throughout the country. What is the resistance of ten kilometers of this wire
Now a peg is placed 4/5 of the way down the pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its startin..
Sheena can row a boat at 3.10 mi/h in still water. She needs to cross a river that is 1.11 mi wide with a current flowing at 1.77 mi/h. Not having her calculator ready, How long does it take her to cross the river
A child whose weight is 262 N slides down a 4.80 m playground slide that makes an angle of 49° with the horizontal. The coefficient of kinetic friction between slide and child is 0.09.
A set of 20 stairs, each of 20-cm height, is ascended by a 700 N man in a period of 1.25 s. Compute the mechanical work, power, and change in potential energy all through the ascent. I have 2800J. Where do I go from here.
A park ranger's flashlight beam strikes a lake surface. What angle does the refracted ray make with the normal in the water
The resistance of a very fine aluminum wire with a 20.0um* 20.0um square cross section is 1000 ohms. How many turns of wire are needed
Find the magnitude of the electron acceleration. Under an influence of its drive force, a snowmobile is moving at a constant velocity along a horizontal patch of snow. When the drive force is shut off, the snowmobile coasts to a halt.
It is found experimentally that the electric field in a certain region of Earth's atmosphere is directed vertically down. At a certain location, Find the net amount of charge contained in a cube
Two protons are moving directly toward one another, When they are very far apart, their initial speeds are 2.77 106 m/s. What is the distance of closest approach
Babies recovering from surgery need to be fed milk from an open syringe through a nasogastric tube, a slender tube that passes in one nostril and down into their stomach
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