Answer:
<em><u>HERE</u></em><em><u> </u></em><em><u>IT</u></em><em><u> </u></em><em><u>IS</u></em>
Explanation:
<h3>
<em><u>Microwaves are very widely used in today’s world. They are used for point-to-point communication links, wireless networks, microwave radio relay networks, radar, satellite and spacecraft communication, medical diathermy and cancer treatment, remote sensing, radio astronomy, particle accelerators, spectroscopy, industrial heating, collision avoidance systems, garage door openers and keyless entry systems, and for cooking food in microwave ovens.</u></em></h3>
<span>Litmus paper changes its
color depending on the pH of the solution or the substance and pH is a measure
of the concentration of hydrogen ions of the substance. Turning blue litmus to
pink signifies that the solution is an acid. Therefore, the correct answer among the choices given is option A. A pH of 3.4 will change blue litmus paper to red.</span>
Answer:
b) Baking soda
Explanation:
Baking soda is sodium hydrogen carbonate, NaHCO₃.
It reacts with water according to the equation
NaHCO₃ + H₂O ⇌ H₂CO₃ + NaOH
Thus, baking soda is a base because it increases the concentration of hydroxide ions in water.
<em>Water</em> is <em>neutral</em>.
<em>Lemon juice</em> is an <em>acid</em> because it contains citric acid.
An <em>insulator </em>is a substance that does not conduct electricity. Insulators are <em>neither acidic nor basic</em>.
Answer:
add the protons and neutrons to find the sum of the total charge
Explanation: