4 years ago

What happened 1 billion years after the Big Bang?

1 answer:

maks197457 [2]4 years ago

8 0

Explanation:

1 billion years after the big bang, the temperature is 20K and some stars and galaxies began to contract due to the gravitational contraction of the over densities of the previous universe. At about 10 billion years after the big bang, our earth and sun form

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Who was this scientist, what ideas did he form, and how did he figure out these new ideas of atoms?

saul85 [17]

Answer:

Atoms cannot be divided.

Explanation:

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4 years ago

A wire of resistance 5.9 Ω is connected to a battery whose emf ε is 4.0 V and whose internal resistance is 1.2 Ω. In 2.9 min, ho

dexar [7]

Answer:

a) 390J

b) 322J

c) 68J

Explanation:

We need to calculate the power given by the battery. the power is given by:

$P=V*I\\I=\frac{V}{R}\\I=\frac{4}{5.9+1.2}\\I=0.56A\\P=2.24W$

Watts is J/s so:

$E=P*t\\E=2.24\frac{J}{s}*2.9min*(60\frac{s}{min})=390J$

The thermal energy in the wire is given by:

$E_w=P_w*t\\P_w=I^2*R_w=0.56^2*5.9=1.85W\\E_w=1.85\frac{J}{s}*2.9min*(60\frac{s}{min})=322J$

And the the dissipated thermal energy in the battery will be the remainig energy:

$E_b=E-E_w\\E_b=390-322=68J$

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4 years ago

Give an example of a substance with an amorphous structure.

Rashid [163]

Answer:

Tempered glass

Explanation:

When warmed, an amorphous substance has a non-crystalline architecture that differentiates from its isochemical liquid, but this does not go through structural breakdown or the glass transition.

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3 years ago

How many calories are needed to vaporize 1g of boiling water at 100?

vfiekz [6]

Using the equation: Q = mL
Q = 1(100) Q = 100cal
I hope this is right and helps :)

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3 years ago

What is the total number of electrons transported from the positive electrode to the negative electrode from the time the batter

katovenus [111]

Answer:

16200

Explanation:

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4 years ago