Question

Multiple choice questions MCQ choose the correct answer for each of the following.
6. A thermos flask keeps a liquid hot by preventing heat loss through
a. conduction
b. convection
c. radiation
d. all of these

7. The temperature of water can be measured with the help of
a. maximum and minimum thermometer
b. metal thermometer
c. laboratory thermometer
d. clinical thermometer​

Answer 1

Answer:

the answer of

( 6 ) is option ( c )

( 7 ) is option (.a)

Answer 2

Answer:

6- all of these

7-Laboratory thermometer

Explanation:

6-.

conduction need contact to transfer the heat so conduction does not takes place in it

in that case conductor will not take place

while in convection heat transfer from molecular fluid to another substance

so convection also does not occur

radiation also

heat transferred by electromagnetic waves

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