Here are two examples of strong nuclear force !
Protons and nucleons
I hope that's help !
b. gas tail
c. dust tail
d. Giant Red Spo
The correct answer is A. cloud of gases that forms around the nucleus of a comet is called a coma. The coma is a dusty, fuzzy cloud around the nucleus of a comet. Other parts of a comet are the nucleus and the tail.
Answer:
giant red spo
Explanation:
Answer:
The correct option is C.) static charge
Explanation:
Rubbing certain objects together, such as an amber bar with a bar covered with wool or skin, resulted in small charges that attracted small iron objects. By rubbing the bars together for a long time, it could cause a spark to appear.
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A) Metallurgy
I hope this one is the correct one , its been a while sine I did history .
Good Luck!
Answer:
potassium and sodium
Explanation:
There are many metals that can react with aluminium nitrate in a displacement reaction. these metals are higher than aluminium in the electrochemical series of elements where metals are arranged based on their reactivity and therefore tend to displace aluminium in any chemical reaction. However the most reactive of these metals are potassium(K) and sodium(Na). Others are calcium(Ca), magnesium(Mg), lithium(Li), strontium (Sr).
The products have higher potential energy than the reactants, and the enthalpy change is positive.
The products have lower potential energy than the reactants, and the enthalpy change is negative.
The products have lower potential energy than the reactants, and the enthalpy change is positive.
Ans: The products have lower potential energy than the reactants, and the enthalpy change is negative.
In general, chemical reactions can be broadly classified into two categories:
1) Exothermic
2) Endothermic
Exothermic reactionsproceed with the evolution of heat. Here, the reactants have a higher potential energy which is released as the reaction progresses to form products. Consequently, the products are in a lower energy state. Since energy is released, the enthalpy change will be negative.
In contrast, endothermic reactions proceed with the absorption of heat. Here,the products will be in a higher energy state. Since energy is absorbed, the enthalpy change will be positive.
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