3 years ago

Which word means the remains or imprints of once-living organisms found in layers of rock

Chemistry

1 answer:

Lerok [7]3 years ago

5 0

Fossils is the answer

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What is the volume of a sample if the density is 2.35 g/mL and the mass is 33.67 g?

lawyer [7]

Density=2.35g/mL
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$\\ \star\sf\longmapsto Density=\dfrac{Mass}{Volume}$

$\\ \star\sf\longmapsto Volume=\dfrac{Mass}{Density}$

$\\ \star\sf\longmapsto Volume=\dfrac{33.67}{2.35}$

$\\ \star\sf\longmapsto Volume=14.32mL$

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3 years ago

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Which formula can be used to find velocity if kinetic energy and mass are known?

astraxan [27]

Answer:

$v = \sqrt{ \frac{2ke}{m} }$

option D is the correct option.

Here,

If an object of mass 'm' moving with a velocity'v' then,

$kinetic \: energy = \frac{1}{2} m {v}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: {v}^{2} = \frac{2ke}{m} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: {v}^{2} = \sqrt{ \frac{2ke}{m} }$