Irregular galaxies, although small in size, have lots of star formation taking place in them.
Answer the following statement true (T) or false (F)
True
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Where are most elements heavier than hydrogen and helium made?
A) in the gas between the stars B) in the cores of stars, in supernovae, and during neutron star mergers C) All elements were made about 5 minutes after the universe began. D) in the cool atmospheres of red giant stars E) in white dwarfs
A 3.0-kg mass is located at (0.0 m, 8.0 m), and a 1.0-kg mass is located at (12 m, 0.0 m). You want to add a 4.0-kg mass so that the center of mass (or center of gravity) of the three-mass system will be at the origin
What should be the coordinates of the 4.0-kg mass? A) (-3.0 m, -6.0 m) B) (-12 m, -8.0 m) C) (3.0 m, 6.0 m) D) (-6.0 m, -3.0 m)
Adiabatic Processes: A monatomic ideal gas expands adiabatically from an initial volume of 72 L and an initial temperature of 350 K until its temperature falls to 290 K. What is the final volume of the gas?
A. 95 L B. 98 L C. 101 L D. 104 L E. 142 L
A 25-kg block on a horizontal surface is attached to a light spring (force constant = 8.0 kN/m). The block is pulled 10 cm to the right from its equilibrium position and released from rest. When the block has moved 2.0 cm toward its equilibrium position, its kinetic energy is 12 J. What is the change in mechanical energy caused by the frictional force on the block as it moves the 2.0 cm?
A. ?4.0 J B. ?3.5 J C. ?2.4 J D. ?2.9 J E. ?15 J