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Nana76 [90]
2 years ago
5

2. Stars normally convert hydrogen into helium through nuclear fusion. That requires incredibly hot temperatures and high pressu

re. At the moment, the temperature of empty space is nowhere near warm enough to fuse any elements together. What type of temperature and pressure conditions needed to be present in the early universe in order to create the first hydrogen atoms
Physics
1 answer:
jolli1 [7]2 years ago
6 0

Answer:

About 4,000 K and 10⁻¹⁷ atm

Explanation:

The Big Bang theory states that the Big Bang which is the origin of the universe was about 13.75 billion years ago, and the temperature a few seconds later was 10³²K

The first element began forming at about 3 minutes after the Big Bang with a temperature of 10⁹ K, the nuclei of simple elements

The nuclei of hydrogen and helium began combine with electrons at a temperature of 3,000 K to 4,000 K to form the first neutral atoms. The pressure of the universe at that stage was 10⁻¹⁷ atmospheres

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Many people drink 2 cans of coke each day. If each can has 39 grams of sugar, how many pounds of sugar is consumed each week? Gi
trasher [3.6K]

Answer:

1.20372

Explanation: start with 39 times 2 for how much grams each day and then multiply that by 7 then the convert grams into pounds

5 0
3 years ago
A radio wave transmits 34.5 W/m2 of power per unit area. A flat surface of area A is perpendicular to the direction of propagati
Ira Lisetskai [31]

Answer:

1.15*10^-7 N/m²

Explanation:

Radiation pressure is the pressure exerted on any surface, as a result of the exchange of momentum between the object and its electromagnetic field.

The formula to calculate radiation pressure on a perfect absorber is

P = s/c, where

P = radiation pressure

s = intensity of light

c = speed of light

Now, on substituting the values and plugging it into the equation, we have

P = 34.5 / 3*10^8

P = 1.15*10^-7 N/m²

therefore, radiation pressure is found to be 1.15*10^-7 N/m²

7 0
3 years ago
When verifying Kirchhoff's rules, you measured: (a) temperature (b) resistance (c) time (d) current
Nadya [2.5K]

Answer:

option D

Explanation:

The correct answer is option D          

When verifying Kirchhoff's law we measure current.    

Kirchhoff's law deal with current and potential difference.              

This law was first described by the German Scientist Gustav Kirchhoff.

Kirchhoff's law stated the current arriving at the node is equal to the current moving out of the node.

3 0
3 years ago
Explain how to get a positive electric charge ​
Natali [406]

Answer:

An electrical charge is created when electrons are transferred to or removed from an object. Because electrons have a negative charge, when they are added to an object, it becomes negatively charged. When electrons are removed from an object, it becomes positively charged

6 0
2 years ago
The density of cork is 0.24 g/cm3. What is the volume of a 240-gram piece of cork?
rjkz [21]
One divides the volume by the density. You get 1000 cm^3=1dm^3
(or one liter, if you want)
5 0
3 years ago
Read 2 more answers
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