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Rory Tyler
Physics
A cup falls off of a table from a height of 0.75 m. What is the impact speed of the cup?
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Ashly Rojas
Physics
There is a 30 g sample of Be-11. It has a half-life of about 14 seconds.
How much will be left after 28 seconds?
A. 3.75 g
B. 7.5 g
C. 15 g
D. 30 g
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Eli Abbott
Physics
What is the difference between amplitude modulation and frequency modulation
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Maia Everett
Physics
How is a habitat different from an ecosystem?
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Rebekah Harmon
Physics
When we look into the band of light in our sky that we call the Milky Way, can we see distant galaxies? Why or why not?
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Guest
Physics
Which organnele is like the brain of the cell
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Antoine Mckenzie
Physics
If three uncharged styrofoam balls are placed together and agitated so that one gains + 3 C of charge and another gains + 4 C of charge, how much charge must there be on the third one? If three uncharged styrofoam balls are placed together and agitated so that one gains 3 of charge and another gains 4 of charge, how much charge must there be on the third one? a.+7 Cb.+1 Cc. 0 Cd.-7 C
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Clara Holloway
Physics
A block of mass m is set sliding up along a frictionless ramp inclined at angle θ relative to horizontal. The angle of the ramp can be varied, but the initial velocity (v) of the block does not vary. The block reaches a height h above its initial level where it momentarily stops. When referring to a change of a variable, it means running the experiment multiple times, each time with a different value for the variable in question.
What happens to the height h as the angle θ is increased?
What happens to the height h if θ and v are kept the same, but the mass m of the block increases?
If we keep m and v the same, but now we add a small amount of kinetic friction to the ramp surface, how does the height h change as θ increases?
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Amaris Chaney
Physics
A car speedometer has a 4% uncertainty. What is the range of possible speeds (in km/h) when it reads 110 km/h?
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Nathen Perkins
Physics
The part of a circult that increases the electric potential of the electrons is the
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Chucky
Physics
Heather and Matthew walk with an average velocity of 0.98 m/s eastward. If it takes them 34 min to walk to the store, what is their displacement?
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Mariah Chambers
Physics
Which describes an inertial frame of reference?
Newton's first law is valid within the frame.
The frame does not move relative to Earth.
Objects remain at rest within the frame.
No forces are exerted within the frame.
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Guest
Physics
A 10 kg block slides on a frictionless surface at 10 m/s. It hits a rough patch 3 meters long with a coefficient of kinetic friction of 0.4. When it reenters the frictionless surface, how fast is it going?
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Hugo Gutierrez
Physics
Why do scientists often use quantitative statements instead of qualitative statements?
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Abigayle Bass
Physics
Electric energy can be transferred into other types of energy we often experiences transformation of energy in our every day lives the example that represents a transformation from electrical to sound energy is
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