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Answers this please.all right answer of my questions please. urgently.
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The experiment that can be used to show that water is a poor conductor of heat is as follows; Take a hard glass test tube and into it drop a tiny ice cube wrapped in a wire-gauze. ... It is noted that water starts boiling near the top but the ice does not melt. This experiment shows that water is a poor conductor of heat.
Answer:
A violin string vibrates with fundamental frequency of 220 Hz. The frequency of first overtone is A 440 Hz (B) 420 Hz © 410 Hz D 400 Hz
Explanation:
Frequency of oscillation of string in n
th
harmonic is
2l
nc
.
where c is the speed of the wave in the string.
Since the string vibrates in 4 segments, n=4
400=
2l
4c
⟹
2l
c
=100
Fundamental frequency f
1
=
2l
1×c
=100Hz