please answer my question
Answers
1) Place the forearm across the chest and ensure the upper arm is resting against the patient's side. Leave the thermometer in place for 5 minutes. This will ensure that the reading will be accurate. Remove the thermometer, read, and immediately record the temperature on the record chart or in the patient's notes.
2) Black surface absorbs more heat than coloured surface because black absorbs all the wavelength and hence absorbs more heat. Where as in coloured surface it reflects wavelength and hence absorbs less heat.
3) Saliva initiates the process of digestion in the mouth. The food substance which gets mixed with the food in the mouth during chewing by teeth is saliva. It acts as digestive juice and softens the food, which further leads to the easy process of digestion. It is secreted by salivary glands.
4) Magnesium reacts with oxygen to make a compound called magnesium oxide. The bright light results because this reaction produces a lot of heat. When the magnesium gets really hot, it emits energy in the form of light .
5) When baking soda is mixed with vinegar, something new is formed. The mixture quickly foams up with carbon dioxide gas. If enough vinegar is used, all of the baking soda can be made to react and disappear into the vinegar solution.
The reaction is:
Sodium bicarbonate and acetic acid reacts to carbon dioxide, water and sodium acetate.
NaHCO3 + CH3COOH CO2 + H2O + Na CH3COO
6) Take a glass and fill it 1/3rd with water. Cover its mouth with an index card. Now, holding the glass carefully, invert the glass. Now, remove your hand from the card. You see that the card is stuck to the glass amazingly.
Do you know why it is the air pressure that is holding it up? The air outside the glass exerts upward pressure on the card.
As the pressure exerted by air outside is larger than the pressure exerted by the water and the air inside the glass. Consequently, the index card holds and water does not fall out.