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3 years ago

Which scientist was the first to use the telescope in astronomy? Copernicus Newton Kepler Galileo

Chemistry

1 answer:

coldgirl [10]3 years ago

8 0

The scientist that was the first to use the telescope in astronomy was Newton

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A home is heated by a system that uses sunlight to warm water in pipes. Which statement best describes this system?

juin [17]

Answer:

In which part of a nuclear power plant does fission take place? A home is heated by a system that uses sunlight to warm water in pipes. Which statement best describes this system? An active solar system because sunlight shines on the pipes naturally.

Explanation:

Hope it helps

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5 0

3 years ago

Read 2 more answers

the pressure and temperature of 10 liters of gas are doubled. if the original condition are 2 atmosphere of pressure and 400k wh

Harman [31]

Answer:

$\boxed{\text{10 L}}$

Explanation:

We have two pressures, two temperatures, and one volume.

This looks like a question in which we can use the Combined Gas Law to calculate the volume.

$\dfrac{p_{1}V_{1}}{T_{1}} = \dfrac{p_{2}V_{2} }{T_{2}}$

Data:

$\begin{array}{rclrclrcl}p_{1}& =& \text{2 atm}\qquad & V_{1} &= & \text{10 L}\qquad & T_{2}& =& \text{400 K}\\p_{2}& =& \text{4 atm}\qquad & V_{2} &= & \text{?}\qquad & T_{2}& =& \text{800 K}\\\end{array}$

Calculation:

$\begin{array}{rcl}\dfrac{2 \times 10}{400}& =& \dfrac{4V_{2} }{800}\\\\0.050& = &0.0050V_{2}\\V_{2}& = &\mathbf{10 L}\end{array}\\\text{The final volume is }\boxed{\textbf{10 L}}$

4 0

3 years ago

Help please and thanks

Likurg_2 [28]

The first one is 2
The second is 1
The third is 6
And the fourth is 3

4 0

3 years ago

The equilibrium of 2H 2 O(g) 2H 2 (g) + O 2 (g) at 2,000 K has a Keq value of 5.31 x 10-10. What is the Keq expression for this

maks197457 [2]

Answer is: Keq expression for this system is Keq = [O₂ ] · [H₂]² ÷ [H₂O]².
Chemical reaction: 2H₂O(g) ⇄ O₂(g) + 2H₂(g).
The equilibrium constant (Keq) is a ratio of the concentration of the products (in this reaction oxygen and hydrogen) to the concentration of the reactants (in this reaction water).

7 0

3 years ago

How do scientists distinguish between an element and a compound? List two elements and two compounds.

Vsevolod [243]

The difference between an element and a compound is that an element is composed of only one kind of atom while a compound is composed of at least 2 kinds of atoms. The properties of an element and the compound the atoms has to form are different physically and chemically.Example of element are O and H, while compound examples are H2O and H2O2.

7 0

3 years ago