Physics, 16.12.2020 09:50 madelyngv97
A student wanted to know the most effective way to grow bacteria in a lab. He conducted a descriptive investigation
instead of an experimental investigation.
What is a limitation of his investigation?
O A descriptive investigation cannot show a cause-and-effect relationship between bacteria growth and possible factors
affecting growth.
O A descriptive investigation is always more expensive than an experimental investigation.
O A descriptive investigation usually does not involve much data collection to support a hypothesis.
O A descriptive investigation provides little prior knowledge or background information about bacteria growth.
Answers: 2
Physics, 21.06.2019 13:30
An astronomer at the equator measures the doppler shift of sunlight at sunset. from this, she calculates that earth’s tangential velocity at the equator is 465 m/s. the centripetal acceleration at the equator is 3.41 ï‚´ 10 ï€2 m/s 2 . use this data to calculate earth’s radius.
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Physics, 22.06.2019 02:30
Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference
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Physics, 22.06.2019 03:50
Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?
Answers: 1
A student wanted to know the most effective way to grow bacteria in a lab. He conducted a descriptiv...
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