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3 years ago

How is using a bow and arrow mechanical and potential energy?

2 answers:

8 0

Answer:A bow and arrow possesses mechanical energy. When the arrow is drawn it has potential energy and when it is released it produces a force to propel the arrow towards the aimed target, therefore giving the arrow kinetic energy. When you combine both energies it creates mechanical energy.

Explanation:

Schach [20]3 years ago

3 0

Answer:

Building up potential energy when pulling it back

Explanation:

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What are the amplitude's for both waves A and B?

Bad White [126]

Answer:

Wave A= 20m

Wave B= 30m

Explanation:

The amplitude of a wave is the maximum displacement (or height) from its equillibrum position.

The equilibrium position is at 0 meters for both waves.

Thus, amplitude of wave A= 20m

Amplitude of wave B= 30m

5 0

3 years ago

How many protons electrons and neutrons respectively does 29 CS have

irakobra [83]

$55 \; \text{e}^{-}$ , $55 \; \text{p}^{+}$ , and $74 \; \text{n}^{0}$ - in case cesium-129 is what you were referring to.

Cesium has atomic number $55$ as seen on a modern periodic table. A cesium atom nucleus would thus contain an equal number of protons; in addition to that, a neutral atom of cesium would contain the same number of electrons in its electron cloud.

For a particular isotope,

$\text{Mass number} = \text{Number of protons per nuclei} + \text{Number of Neutrons per nuclei}$ .

This isotope of cesium has a mass number of $129$ and contains $55$ protons in each atomic nucleus. One cesium nuclei would therefore contain $129 - 55 = 74$ neutrons.

8 0

3 years ago

The fact that all living organisms can be classified into distinct families, groups, and orders provides _ which supports the Sc

dmitriy555 [2]

It provides evidence

8 0

3 years ago

What is the mole fraction of benzene in the solution that has a vapor pressure of 38 torr at 20 ∘C? Express your answer using tw

Eddi Din [679]

The question is incomplete, here is the complete question:

At 20°C the vapor pressure of benzene $(C_6H_6)$ is 75 torr, and that of toluene $(C_7H_8)$ is 22 torr. Assume that benzene and toluene form an ideal solution.

What is the mole fraction of benzene in the solution that has a vapor pressure of 38 torr at 20°C? Express your answer using two significant figures.

Answer: The mole fraction of benzene is 0.302

Explanation:

Let the mole fraction of benzene be 'x' and that of toluene is '1-x'

To calculate the total pressure of the mixture of the gases, we use the equation given by Raoult's law, which is:

$p_T=\sum_{i=1}^n(\chi_{i}\times p_i)$

We are given:

Vapor pressure of benzene = 75 torr

Vapor pressure of toluene = 22 torr

Vapor pressure of solution = 38 torr

Putting values in above equation, we get:

$38=[(75\times x)+(22\times (1-x))]\\\\x=0.30$

Hence, the mole fraction of benzene is 0.30

7 0

3 years ago

Which is a nonrenewable source of energy? Wind Hydropower Natural Gas Solar Energy

pashok25 [27]

Answer:

Natural Gas

Explanation:

Let's remember: A non-renewable resource means a source that is used faster than it can be replaced. The sun will always be there for solar energy. Wind will always be there for wind energy. Hydropower isn't always there, but it is a semi-renewable source because it is replenished relatively fast. We are left with natural gas, and it takes millions of years to replace.

5 0

3 years ago