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3 years ago

Why is a shell considered to be biotic

Physics

2 answers:

Jlenok [28]3 years ago

8 0

Shell is considered to be biotic because it has life, it is a living thing.

kodGreya [7K]3 years ago

5 0

It originates from a living organism and is most likely a carbon structure.

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eva is a food scientist. she constantly researches on developing new and effective food techniques. She is exposed to various ty

Crazy boy [7]

Answer:

ANSI

Explanation:

3 0

3 years ago

Coulomb's law for the magnitude of the force FFF between two particles with charges QQQ and Q′Q′Q^\prime separated by a distance

SSSSS [86.1K]

Answer:

${F_{tot} = -1.092*10^{-2}N$

Explanation:

The question: What is the net force exerted by these two charges on a third charge q_3 = 47.0 nC placed between q_1 and q_2 at x_3 = -1.240 mm ?

Your answer may be positive or negative, depending on the direction of the force.

Solution:

The coulomb force is given by the equation

$F =k\dfrac{q_1 q_2}{d^2}.$

where $d$ is the separation between the charges $q_1$ and $q_2$ .

Now, in our case

$q_1=-13.5nC=-13.5*10^{-9}C$

$q_2=-1.735nC=-1.735*10^{-9}C$

$q_3= 47*10^{-9}C$

The separation between charges $q_3$ and $q_1$ is

$d_{31}= (-1.240mm)-(-1.735mm)=0.495mm=4.95*10^{-4} m$

Therefore, the force between them is

$F_{31} = (9*10^9NmC^{-2})\dfrac{47*10^{-9}*(-13.5*10^{-9})}{4.95*10^{-4}} =-0.01152N$

and it is directed in the negative x-direction.

The separation between charges $q_2$ and $q_3$ is

$d_{23} =-1.240mm-0=-1.240*10^{-3}m$

therefore, the force between them is

$F_{23} =(9*10^9Nm^2C^{-2})\dfrac{47*10^{-9}C*(-1.735*10^{-9}C)}{-1.240*10^{-3}m}=5.94*10^{-4}N$

Therefore the total force on charge $q_3$ is

$F_{tot} =5.94*10^{-4}-0.01152N = -0.010926N\\\\\boxed{F_{tot} = -1.092*10^{-2}N}$

8 0

3 years ago

If a girl is running along a straight road with a uniform velocity 1.5m/s find her acceleration

Jlenok [28]

Answer:

Dear user,

Answer to your query is provided below

Acceleration is zero because of no change in velocity.

Explanation:

Remember that velocity is a vector quantity and a vector can change in 3 ways

•Magnitude only

•Direction only

•Both magnitude and direction.

Now the magnitude of velocity (speed) can stay constant while the direction is changing. This is the case in circular motion.

In the question above, it is mentioned that the girl is moving along a straight road. Therefore no change in direction of velocity.

7 0

3 years ago

Describle the path that moisture takes from the ocean to the runoff that forms a river

Sergeu [11.5K]

The path that moisture takes from the ocean to the runoff that forms a river is:
1.Evaporation (water changes from a liquid to a gas or vapor)
2. Condensation (clouds are formed)
3. Precipitation (Any form of water that falls to the Earth's surface from the clouds)

3 0

3 years ago

The satellite s travels around the earth in a circular path with a constant speed of 20 mm>h. If the acceleration is 2.5 m&gt

Zanzabum

Answer:

The altitude of planet = 5989.198 km

Explanation:

We know that centripetal acceleration, $a = v^2/r$ , where v is the velocity and r is the radius. In this case both acceleration and velocity is given, so we can find radius of satellite.

v = $20 Mm/hr = 20*10^6/3600 = 5555.56 m/s$

a = $2.5 m/s^2$

So, $2.5 = 5555.56^2/r\\ \\ r = 12345698.77 m = 12345.698km$

We have diameter of earth = 12713 km

Radius of earth = 12713/2 = 6356.5 km

The altitude of planet = Radius of planet - radius of earth

= 12345.698 - 6356.5

= 5989.198 km

8 0

3 years ago