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Layne Hanna
Physics
What is the efficiency of a tractor that has a work output of 300j and a work input of 400j
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Angelique Higgins
Physics
An atom with 19 protons and 18 neutrons is an
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Londyn
Physics
Where does the "2" come from in the expression for paverage? why is there no time dependence? } questions 55 - 56 consider alternating current. 55. beyond the very unfamiliar behaviors of ac circuits we have seen in the lab, what is the major reason we describe the power in an ac circuit as paverage rather than p (t) ? 56. where does the "2" come from in the expression for paverage?
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Jared Payne
Physics
Indicate whether the statement is true or false. A scientific fact is something that is absolute and unchanging.
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Jamari Joyce
Physics
What is common to all light sources, including incandescent, fluorescent, neon, halogen, laser, and sodium-vapor devices?
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Guest
Physics
Total peripheral resistance is related to all of the following except the
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Blaine Ali
Physics
Which one of the following is NOT a simple machine?
A. Wheel and axle.
B. Inclined Plane.
C. Lever.
D. Bicycle
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Wayne Doyle
Physics
A cork floats on the surface of an incompressible liquid in acontainer exposed to atmospheric pressure. The container is thensealed and the air above the liquid is evacuated. The cork:
A) sinks slightly
B) rises slightly
C) floats at the same height
D) bobs up and down about its old position
E) behaves erratically
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Jaelyn Hutchinson
Physics
What is the energy equivalent of 0.026 kg?
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Anna Russell
Physics
Which of the following materials requires the most amount of heat to raise (or lower) its
temperature by one degree Celsius? Assume we have the same amount of each material,
10 grams. Feel free to reference Table 14.1 in the OpenStax textbook.
lead
iron
O water
aluminum
Oglass
steel
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Skylar Frey
Physics
If we decrease the amount of force applied to an object, and all other factors remain the same, the amount of work completed will
A decrease.
B increase.
C increase, then decrease.
D not change.
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Shaylee Tate
Physics
Passing an electric current through a certain substance produces oxygen and sulfur. This substance cannot be a (n)
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Kylee Odom
Physics
The atomic mass of an element is
A. The average mass of all the isotopes of the element
B. A measure of the density of that element
C. The mass of the most common isotope of that element
D. The number of protons and electrons in the atoms of the element
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Katherine Little
Physics
Why does sound travel faster in water than in air?
A.
because water is a denser medium than air
B.
because air is a denser medium than water
C.
because water has a larger wavelength than air
D.
because air has a larger wavelength than water
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Callahan
Physics
Explain the working principle of a pressure filter
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