A 10-kg mass and a 6.0-kg mass are connected by a light string over a massless, frictionless pulley. If g = 9.8 m/s2, what is the acceleration of the system when released?
a. 2.5 m/s2
c. 7.8 m/s2
b. 6.5 m/s2
d. 9.8 m/s2
A
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Compared to other spiral galaxies, the Milky Way is ____
a. comparable to the smallest and dimmest spirals known b. smaller and dimmer than most spirals c. very average in size and luminosity d. larger and brighter than most spirals e. comparable to the largest and brightest spirals known
According to current understanding, the first generation of stars in the universe ________ than differ stars born today.
A) were much more massive B) contained much more hydrogen and helium C) were much cooler in temperature D) were much more likely to be members of binary star systems
A mass is attached to a fixed point by means of an ideal spring with zero unstretched length and is free to move in two dimensions
What would be the equivalent statement of Kepler's third law for this situation in the case of circular orbits around the fixed point?
Young open clusters contain a lot of hot, young blue-white stars
Indicate whether the statement is true or false