A container of ideal gas at STP undergoes an isothermal expansion and its entropy changes by 3.66 J/°K. How much work does it do?
What will be an ideal response?
999. J
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Weight and g: An piece of space debris is released from rest at an altitude that is two earth radii from the center of the earth. Compared to its weight on Earth, the weight of this debris is
A. zero. B. the same as on the surface of the earth. C. one-half of its weight on the surface of the earth. D. one-third of its weight on the surface of the earth. E. one-quarter of its weight on the surface of the earth.
Significant Figures: Using a digital balance the mass of a certain piece of wood is read as 12.946 g. Thinking in terms of accuracy and significant figures, what value would you record on your data sheet if the balance is accurate to one-tenth of a gram?
A. 12.9 g B. 12.95 g C. 13 g D. 13.0 g
Projectile Motion: A celebrating student throws a water balloon horizontally from a dormitory window that is 50 m above the ground. It hits the ground at a point 60 m from the building without appreciable air resistance.(a) What will be the horizontal component of the velocity of the balloon just before it hits the ground?(b) What will be the magnitude of the vertical velocity of the balloon just before it hits the ground?
What will be an ideal response?
While quasars may have now vanished, the large black holes they formed are still around, just not being fed as well any more
Indicate whether the statement is true or false