What determines the life cycle of a star

Answers

Answer 1

Answer: Hi There!

What determines the life cycle of a star?

A star's life cycle is determined by its mass! :)

Answer 2

Answer: A star's life cycle is determined by its mass. The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born

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What period is Pb in

Answers

Pb (lead) is in the 6th period

(please give brainliest if this helped you)

When an animal behaviriost attempts to explain or interpret her observations, she is ___________.

Answers

Answer:

B.) Possibly making an infrence.

Explanation:

Judging on what sshe saw, she can try to infer or come up with an answer. [based on what she observed.]

How do i describe how a constant volume calorimeter can be used to measure the heat transferred from a burning piece of coal to cool water.

Answers

calorimeter is a device used to measure the amount of heat involved in a chemical or physical process. For example, when an exothermic reaction occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution, which increases its temperature. When an endothermic reaction occurs, the heat required is absorbed from the thermal energy of the solution, which decreases its temperature ([link]). The temperature change, along with the specific heat and mass of the solution, can then be used to calculate the amount of heat involved in either case.

suppose you increase the mass of wood you are burning in a fireplace. what will happen to the total mass of ash what will happen to the total mass of ash,gases,and water vapor

Answers

Due to the law of conservation of mass, the mass in the end of the change will remain the same.

When the pressure changes from 1417 psi to psi the volume changes from 0.145 L to 0.878 l and the temperature changes from 287 k to 196k

Answers

Answer:

When the pressure changes from 1417 psi to 160.186 psi the volume changes from 0.145 L to 0.878 l and the temperature changes from 287 k to 196 k

Explanation:

According to general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

Given data:

Initial volume = 0.145 L

Initial pressure = 1417 psi (1417/14.696 =96.42 atm)

Initial temperature = 287 K

Final temperature = 196 K

Final volume = 0.878 L

Final pressure = ?

Formula:

P₁V₁/T₁ = P₂V₂/T₂

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

P₂ = P₁V₁ T₂/ T₁ V₂

P₂ = 96.42 atm × 0.145 L × 196 K / 287 K × 0.878 L

P₂ = 2740.26 atm .L. K / 251.99 k. L

P₂ = 10.9 atm

atm to psi:

10.9 × 14.696 = 160.186 psi

Answer:

160.186 psi

Explanation:

describe the substitution reaction of ethane and chlorine gas in the presence of UV rays (including the chemical equation for each stage of the reaction)

Answers

answer attached to the document

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