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3 years ago

What would probably happen if it took the Earth longer to orbit the Sun than it does now? *

Chemistry

1 answer:

Setler79 [48]3 years ago

4 0

the Earth is eccentric,this means that it has changed repeatedly over time

And if it took the earth more time to orbit round the sun than it does now the years would have more than Han 365 days a year

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Andrew plays trumpet in the concert band. He holds the trumpet still at his side until it is time for him to play. When it is ti

Tom [10]

Answer:

Explanation:

The first law is An object won't move by itself, and once in motion, it won't stop unless some force acts upon it. With this being said when the trumpet is at his side and he is not holding it will not move not until he lets go of it.

6 0

4 years ago

Read 2 more answers

Calculate the concentration of vacancies in copper at room temperature (25oC). What temperature will be needed to heat treat cop

rosijanka [135]

Answer:

1) 1.808 *10^8 vacancies per cm^3

2) 101,64ºC

Explanation:

You can use the following equation relating the number of vacancies with the energy required to produce them and the temperature:

$n_{v} =Ne^{\frac{-E}{K_{b}*T} }$

Where N is the number atoms per unit of volume, you can calculate this number with the density of copper:

$8.96 \frac{g}{cm^{3} } *\frac{1 mole copper}{63.54 g } *\frac{6.023*10^{23} atoms }{1 mole} = 8.47*10^{22}atoms$

And you can substitute all values in the equation:

$n_{v} =8.47*10^{22}atoms*e^{\frac{-20 000 cal}{6.023*10^{23}mol^{-1}*3.297*10^{-24}cal*k^{-1}*298.15K} }=1.808*10^{8}atoms$

Now you solve for temperature and and use n as 1000 times the value of before:

$T=\frac{-E}{k_{b}ln(n/N)} =\frac{-(2*10^{4}cal)}{(3.297*10^{24}calk^{-1})*ln(1.8083*10^{11}/8.47*10^{22})} =374.79 K = 101.64 C$

3 0

4 years ago

Homologous chromosomes pair up during what phase of meiosis:

pochemuha

Answer:

prophase I

Explanation:

Homologous chromosomes pair up during prophase I of meiosis.

8 0

3 years ago

Consider this reaction: acid + base salt + water. What type of reaction is this?

Sati [7]

Acid + base ---> Salt + water is a neutralization reaction

5 0

3 years ago

Read 2 more answers

Find the mass of a single one of the molecules or ionic compounds listed below. You must show your work in the correct format an

Lemur [1.5K]

I don’t really know tho

3 0

3 years ago