Answer:
B
Explanation:
Chemical changes would mean changes that does not change in the form of matter.
A) water freezing in a pond is liquid to solid, so form of matter change, so it cannot be this one.
C) A tree buming is solid to gas, so form of matter change, so it cannot be this one.
D) Steam rising from pavement is solid to gas, so for of matter change, so it cannot be this one.
On the other hand B, the matter stays in the same form, solid.
Tree branch to a tree branch.
Answer:
increase
Explanation:
because in endothermic reaction heat is absorbed
Answer:
<em>Quantisation</em><em> </em><em>is</em><em> </em><em>total</em><em> </em><em>charge</em><em> </em><em>by</em><em> </em><em>number</em><em> </em><em>of</em><em> </em><em>electrons</em><em>.</em><em> </em>
<em>q</em><em>=</em><em>ne</em>
<em>here</em><em> </em><em>q</em><em> </em><em>is</em><em> </em><em>quantisation</em>
<em>n</em><em> </em><em>is</em><em> </em><em>number</em><em> </em><em>of</em><em> </em><em>electrons</em>
<em>e</em><em> </em><em>is</em><em> </em><em>standard</em><em> </em><em>charge</em><em> </em><em>that</em><em> </em><em>is</em>
<em>e</em><em>=</em><em> </em><em>1.6 × 10</em><em>p</em><em>o</em><em>w</em><em>e</em><em>r</em><em>-</em><em>1</em><em>9</em><em>C</em>
Explanation:
<h2>HOPE IT WILL HELP YOU✌✌✌✌✌</h2>
Answer;
Electromagnetic wave
Explanation;
Electromagnetic waves are waves that do not require a material medium for transmission, they include, x-rays, gamma rays, visible light etc.
