Answer : The order of potential energy from least to greatest is,
(3) < (1) < (4) < (2)
Explanation :
Formula used :
where,
P.E = potential energy
m = mass of an object
g = gravity constant = 
h = height
Now we have to calculate the potential energy of following options.
(1) Tiles a 15-kilogram stone found at a height of 3 meters.
(2) 10 kilograms of water stored at a height of 9 meters.
(3) 1-kilogram ball located 20 meters.
(4) In the area box of books weighing 25 kilograms placed on a shelf 2 meters high.
From this we conclude that, the order of potential energy from least to greatest is,
(3) < (1) < (4) < (2)
The number of moles of air present is 0.056 mole
<h3>What is the ideal gas equation?</h3>
The ideal gas is one in which molecules do not attract or repel each other.Many gases like oxygen,nitrogen, carbon di oxide can be treated as the ideal gases as particular temperature and pressure.The real gases at high temperature and lower pressure can be treated as ideal gases.
The given data in the question is
Volume = 1.35 L
Pressure (P) = 750 torr
Temperature (T) = 17 °C = 17 + 273 = 290 K
Gas constant (R) = 62.396 L•torr/mol•K
The number of moles (n) =?
How to determine the number of moles:
The number of moles present can be obtained by using the ideal gas equation as illustrated below:
Divide both sides by RT
Hence, the number of moles of air present is 0.056 mole
To learn more about the ideal gas equation follow
brainly.com/question/4147359
Answer:
melting
Explanation:
the ice would turn to water before it evaporated
Beta radiation takes the form of either an electron or a positron (a particle with the size and mass of an electron, but with a positive charge) being emitted from an atom. Due to the smaller mass, it is able to travel further in air, up to a few meters, and can be stopped by a thick piece of plastic, or even a stack of paper. It can penetrate skin a few centimeters, posing somewhat of an external health risk. However, the main threat is still primarily from internal emission from ingested material.
In a thermochemical equation, the enthalpy change is always written next to the balanced chemical equation.
For example, chemical reaction:
2Mg + O₂ → 2MgO. ΔH = -1204 kJ; this is exothermic reaction,
or chemical reaction: Fe₂O₃(s)
+ 3CO(g) → 2Fe(s) + 3CO₂<span>(g);ΔH = + 26.3 kJ, ths is endothermic reaction.</span>
<span>There are two types
of reaction: endothermic reaction (chemical reaction that absorbs more
energy than it releases) and exothermic reaction (chemical reaction that
releases more energy than it absorbs). </span>
