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Two Astronomy Questions, site reference if used, no minimum or max word count just enough to justify the answer.
1) Do you think it is likely that the human race will continue to exist until the Sun begins to expand into a red giant? Explain why or why not.
2) Provide an example of popular culture's use of the term black hole. Why do you think a mysterious idea as that of a black hole has captured the public imagination?
A football player punts the ball at a 49° angle. Without an effect from the wind the ball would travel 68.0 meters horizontally. What is the initial speed of the ball
A solenoid of radius 4.5 cm has 600 turns and a length of 15 cm. Find the rate at which current must change through it to produce an emf of 60 mV
while exploring a cave a spelunker starts at the entrance and moves the following distances 75.0 m north 300 m east 200
a beam of accelerated protons from the large hadron collider can be used to spray paint an insulator with protons.
Two trains running in opposite direction cross a man standing on the platform in 27 sec. and 17 sec. respectively and they cross each other in 23 seconds. Find the ratio of their speed
In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 530nm, What is the work function of this material
A man walks 8.0 miles EAST, then 5.0 miles SOUTH, then 3.0 miles WEST. Determine what is the resulting displacement
Two 69 g ice cubes are dropped into 202 g of water in a thermally insulated container. what is the final temperature at thermal equilibtrium
Two circular current loops are located at z = +R/2 and z = ?R/2, parallel to the xy-plane and centered at the z-axis. Derive a formula for the magnetic field at an arbitrary point on the z-axis. Note by symmetry that B(x) = Bz(z) k
Which of the following devices uses total internal reflection function?
A certain substance has a mass per mole of 39 g/mol. When 306 Jis added as heat to a 28.0 g sample ofthis material, What is the molar specific heat of the substance
A highway curve with radius 1000{\rm ft} is to be banked so that a car traveling 48.0{\rm mph} will not skid sideways even in the absence of friction
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