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The bright summer star Vega has a parallax angle of 0.129 arcsec. How far away is it? Give your answer in light-years. Calculate the number of seconds in a year (365 days). Express your answer in standard exponential notation, with three significant figures.
the astronaut whose heart rate on earth is 65 per minute increase his velocity to v=.95c. what is now his heart rate as measured by an earth observer
A 1 mL syringe has an inner diameter of 4.0 mm, a needle inner diameter of 0.220 mm, and a plunger pad diameter (where you place your finger) of 1.20cm.
at a time when mining asteroids has become feasible astronauts have connected a line between their 3120-kg space tug
Two 24.1-cm-focal-length converging lenses are placed 16.5-cm apart. An object is placed 35.0-cm in front of one lens. What is the total magnification
A collision between two protons produces three new particles: p + p --->p + + + 0 + 0. The rest energies of the new particles are + (139.6 MeV), 0 (1116 MeV), 0 (497.7 MeV). Note that one proton disappears during the reaction. How much of the protons..
An ideal gas expands 6 times its initial volume, maintaining 450K temperature if gas does 5.3 Kj of work on its surrounding. How many moles of gas are there
An Automobile engine slows down from 4500 rpm to 1200 rpm in 2.50 s. Calculate (a) its angular acceleration, assumed constant and (b) total number of revolutions the engine makes in this time.
A certain type of propeller blade can be modeled as a thin uniform bar 2.80m long, find the maximum angular acceleration the blade could achieve
a 10000 car comes to a bridge during a storm and finds the bridge washed out. the 750 driver must get to the other side
question power plant that uses the temperature gradient of the ocean has been proposed. the system is to operate
A car initially traveling eastward turns north by traveling in a circular path at uniform speed, Determine the car's average speed
An object is placed in front of a converging lens in such a position that the lens (f = 13.1 cm) produces a real image located 22.0 cm from the lens. What is the image distance of this new image
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