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3 years ago

Explain feather and coin experiment (don't copy )

Physics

1 answer:

Neko [114]3 years ago

3 0

Answer:

A British scientist Robert Boyal performed an experiment about a feather and coin.

firstly he dropped a coin and a feather simultaneously ( together) in a jar in which the coin reached the bottom first .

again ,

he removed the atmosphere inside the jar by vaacum pump and then he again dropped the feather and coin simultaneously . now both the coin and feather reached the bottom together .

conclusion:

the acceleration produced on a body is the same for all the bodies and it does not depend upon the mass of the falling body.

hope this helped u☺️

any confusion then comment it.

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Materials will have different energies associated with the electrons inside them. This is related to how strongly bound they are

andrey2020 [161]

Answer:

E = 401.3 eV

Explanation:

As we know that the thinnest gap in the direction of metal is given as

$t = 3.09 nm$

so here we can say that lowest energy of photon will not able to break this electron from above thickness

so we will have

$E = \frac{hc}{\lambda}$

here we have

$hc = 1240 nm-eV}$

also we have

$\lambda = 3.09 nm$

so we will have

$E = \frac{1240}{3.09} eV$

$E = 401.3 eV$

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4 years ago

A hammer is used to hit a nail into a board. Which statement is correct about the forces at play between the nail and the hammer

emmasim [6.3K]

Answer:

Hewo My Lovelys!!

Answer is down below!!

Explanation:

The answer is C) The nail exerts an equal force on the hammer in the opposite direction.

Reason: The Newtons third law states that there is an equal an opposite reaction for every action. When hammer pushes the nail, the nail will push the hammer back in opposite direction. When the hammer hits a nail then nail will exert the equal and opposite force to the hammer. These both objects will exert force on each other in opposite directions.

Hope this helps!! =3

Have a great day, evening, of night!! <3

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3 years ago

Read 2 more answers

Great amounts of heat are found at hotspots. what is the source of this heat?

GarryVolchara [31]

Molten minerals inside earth is the source

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3 years ago

How much heat is absorbed by 20g granite boulder as energy from the sun causes its temperature to chage from 10C to 29 c (Specif

Leno4ka [110]

Answer:

Q = 266 Joules

Explanation:

Given the following data;

Mass = 20g

Initial temperature = 10°C

Final temperature = 29°C

Specific heat capacity of granite = 0.1 Cal/g°C to J/g°C = 0.7J/g°C

To find the quantity of heat absorbed;

Heat capacity is given by the formula;

$Q = mcdt$

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

Substituting into the equation, we have;

Q = 20*0.7*(29-10)

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6 0

3 years ago

25 POINTS FOR ANSWER How are Newton’s Laws used to describe the motion of planets? Justify your response in two or more complete

Alexus [3.1K]

Pour la seule et simple raison qu'elle s'exerce entre tous les corps de l'univers ( objet, astres etc..

Si on tient compte des frottements liés aux chocs successifs des billes les une sur les autre, au bout d'un certain temps, le mouvement va cesser.

Si on dit que toute l'énergie potentielle de pesanteur est transformée en énergie cinétique, et réciproquement, donc que l'énergie mécanique est conservée au fil des chocs et des rebonds, alors, le mouvement est perpétuel. Le nombre de billes qui remontent est toujours égal au nombre de billes qu'on a lâchées.

La première loi concerne des systèmes immobiles, ou plutôt on considère des systèmes dit "isolé", c'est à dire qu'ils ne sont pas soumis à d'autre force que celle que l'on connait.

Ce qu'il faut retenir de celui ci c'est ça :

Si j'ai un système en mouvement rectiligne uniforme OU immobile, alors :

Avec F1 F2 F3, trois forces s'exercant sur mon système

Attention ! Ici je n'ai pas mit les flèches sur les différentes forces mais elles sont obligatoires ! On parle de vecteur force !

Pour la deuxième loi :

C'est le même principe, la différence c'est que l'on est en mouvement.

Avec a le vecteur accélération. Il y a beaucoup de ressource sur le net, n'hésite pas à regarder, la j'ai simplement pu te donner les expressions les plus connus. Mais il faudra les manipuler, et sans exercice sur lequel se baser, c'est plus difficile !

La troisième loi est bien moins importante que les deux autres, mais n'hésite pas à regarder sur le net, tu trouveras l'énoncé. C'est la même logique.

4 0

3 years ago

Explain feather and coin experiment (don't copy )​

Explain feather and coin experiment (don't copy )