If the following graphs are for the same reaction, which one is most likely the one with an added catalyst?
A) a
B) b
C) c
D) d
E) All have had catalyst added.
Answer: B
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Nellie pulls with a force of 50 N on a horizontal rope tied to a tree at rest. The net force on the rope is
A) 50 N and rope tension is 0 N. B) 50 N and rope tension is also 50 N. C) zero and rope tension is 50 N. D) zero and rope tension is also zero.
Each pattern shown below would appear on a screen when monochromatic light of wavelength ? first passes through a narrow slit of width a and then strikes a screen. The darkest areas on the page represent the brightest areas on the screen. In which case does the slit have the narrowest width?
a.
b.
c.
An Atwood machine has a mass of 3.50 kg connected by a light string to a mass of 6.00 kg over a pulley with a moment of inertia of 0.0352 kg m2 and a radius of 12.5 cm
If the system is released from rest, what is the speed of the masses after they have moved through 1.25 m? A) 2.00 m/s B) 2.28 m/s C) 4.00 m/s D) 4.95 m/s E) 6.00 m/s
How do astronomers think Jupiter generates most of its internal heat?
A) tidal heating B) internal friction due to its high rotation rate C) chemical processes D) nuclear fusion in the core E) by slowly contracting