Riya wants to find out how metal conducts heat. She attaches four nails on a copper rod with wax. Riya heats one end of the copper rod with a flame.
Q:- Which nail will fall last?
A.Nail 1
B.Nail 2
C.Nail 3
D.Nail 4
Q:- What should Riya keep the same in her activity?
A. Length of the nails
B. Material of the nails
C. Thickness of wax coatings
D. Distance between the nails
(See the pic)
Q:- Which nail will fall last?
A.Nail 1
B.Nail 2
C.Nail 3
D.Nail 4
Q:- What should Riya keep the same in her activity?
A. Length of the nails
B. Material of the nails
C. Thickness of wax coatings
D. Distance between the nails
(See the pic)
Answers & Comments
Answer:
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Explanation:
In Riya's activity, the nail that falls last will be the one that is farthest away from the end of the copper rod that is being heated. This is because metal conducts heat, so the heat will travel along the copper rod and cause the wax to melt. As the wax melts, the nails will become loose and eventually fall off.
To answer the second question, Riya should keep the material of the nails the same in her activity. This is because different materials have different thermal conductivities, which can affect how quickly the heat travels along the nails and how quickly the wax melts. By keeping the material of the nails the same, Riya can ensure that she is only testing the conductivity of the copper rod.
I hope this information is helpful.