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stealth61 [152]
2 years ago
6

Pls help. Plant cell

Biology
1 answer:
Soloha48 [4]2 years ago
5 0

Answer:

B and D (the 4th answer)

Explanation:

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A water molecule, because of its shape, is a polar molecule. That is, it has one side that is positively charged and one side that is negatively charged. The molecule is made up of two hydrogen atoms and one oxygen atom. The bonds between the atoms are called covalent bonds, because the atoms share electrons.
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What is the role of activation energy in a chemical reaction
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A planet has a mass of 5.97 x 1024 kg and a radius of 6.38 x 106 m. Find the weight of a 65.0 kg person at 1000 km above the sur
mote1985 [20]

<u>Answer:</u> The weight of the person above the surface of a planet is 635.83N.

<u>Explanation:</u>

To calculate the weight of a person, we use the formula:

w=mg     ....(1)

where,

w = weight of an object

m = mass of the person = 65kg

g = acceleration due to the gravity of the planet

For the calculation of weight, we need to first find the acceleration due to gravity and for that we use the formula:

g=\frac{GM}{r^2}

where, g = acceleration due to gravity = ?m/s^2

G = Universal gravitational constant = 6.67\times 10^{-11}Nm^2/kg^2

M = mass of the planet = 5.97\times 10^{24}kg

r = distance of the person from the planet = 6.38\times 10^6m

Putting values in above equation, we get:

g=\frac{(6.67\times 10^{-11}kgm/s^2.m^2/kg^2)(5.97\times 10^{24}kg)}{(6.38\times 10^6m)^2}\\\\g=9.782m/s^2

Putting this value in equation 1, we get:

w=65kg\times 9.782m/s^2=635.83N

Hence, the weight of the person above the surface of a planet is 635.83N.

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Name two organelle that have highly folded membranes. What is the advantage of the folds?
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Answer:

mitochondria, golgi, ER

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These folds have a great advantage for mitochondria as they increase the surface area where chemical reactions occur.

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What identity status has an individual adopted who has neither experienced an identity crisis nor commitment?
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Answer:

Identity Diffusion

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A person whose identity status is Diffusion has not had an identity crisis and has not yet fully realized their social identity or personal traits. Moreover, this person is not seeking to make a commitment to establish his or her identity. It is almost like identity Foreclosure; however, in that stage, the person adopts some traits and qualities of friends and parents.

7 0
2 years ago
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