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siniylev [52]
3 years ago
12

Some good estimates about the human body can be made if it is assumed that we are made mostly of water. The mass of a water mole

cule is 2.99 * 10^-26 kg. If the mass of a person is 62 kg, estimate the number of water molecules in that person.
Physics
1 answer:
Bezzdna [24]3 years ago
6 0

Answer:

Explanation:

Given

mass of water molecule m=2.99\times 10^{-26}\ kg

mass of person M=62\ kg

It is given that body is mostly made up of water

suppose n water molecules constitutes 62 kg

so n\times m=M

n=\frac{62}{2.99\times 10^{-26}}

n=20.73\times 10^{26}\ kg

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Can someone solve this problem and explain to me how you got it​
likoan [24]

Answer:

Explanation:

Coulomb's law states that the force of attraction or repulsion between any two charges is proportional to the product of the magnitude of charges and inversely proportional to the square of the distance between the charges

⇒F\alpha\frac{q1*q2}{r^{2}}

∴F=k\frac{q1*q2}{r^{2}}

where F is the force of attraction or repulsion

k is Coulumb's constant=9*10^{9}Nm^{2}C^{-2}

q1 and q2 are the magnitude of the charges

r is the distance between two charges

The force between the two charges is attractive if they are of different polarity

The force between the two charges is repulsive if they are of same polarity

Question 7:

Given: F=1.9*10^{-29}N, q1=q2=1.6*10^{-19}C

By coulomb's law,

1.9*10^{-29}=9*10^{9}*\frac{1.6*10^{-19}*1.6*10^{-19}}{r^{2}}

⇒r=3.5m

Question 6:

Given: q1=q2=-1.5*10^{-6}C, r=0.28m

By coulomb's law,

F=9*10^{9}*\frac{1.5*10^{-6}*1.5*10^{-6}}{0.28^{2}}

⇒F=0.26N

3 0
3 years ago
How might you describe the mathematical procedure of finding the displacement when an object travels in two opposite directions?
levacccp [35]
Displacement is a vector quantity. So, you incorporate the vector calculations when you try to determine the resultant vector. This is the shortest path from the starting point to the endpoint. If they are moving on one axis only, you use sign conventions. For motions moving to the left, use the negative sign. If it's moving to the right, then use the positive sign. Now, it the object moves 2 km to the left, and 2 km also to the right, the displacement is zero.

Displacement = 2 km - 2km = 0

Generally, the equation is:
<span>Displacement = Distance of motion to the right - Distance of motion to the left</span>
4 0
3 years ago
Read the following excerpt about water availability to living organisms.
lapo4ka [179]

Answer:

1 percent

Explanation:

It says that only 3 percent of the water is fresh. So it can be 1 percent or 3 percent. But then it says that most of the water is locked up in glaciers and polar ice caps. So the animals would have a hard time getting to this water. So the rest is available for them. Approximately 1 percent is most reasonable.

5 0
3 years ago
Read 2 more answers
Object a and object b are both in motion when they collide with each other. They then continue in a new direction unaffected by
Harrizon [31]
This is an elastic collision

bcuz i think they move apart after the collision

sorry if im wrong
8 0
2 years ago
Which statement is true about the force of gravity?
kumpel [21]

Answer:

The moon's gravity pulls the Earth to make tides.

Explanation:

The Moons Gravity Pulls On The Earth With Different  Strenght Making High Tide And Low Tide.

Hope This Helps!

4 0
2 years ago
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