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Standard V

Science

Human Body Temperature

Adi walks fro...

Question

Adi walks from a room with marble flooring to the balcony with wooden flooring on a cold day. He finds the wooden flooring in the balcony to be warmer than the marble flooring in the room. This is because:

Wood is a good conductor of heat.

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Marble is a poor conductor of heat.

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Marble is a good conductor of heat.

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Wood has the same heat conductivity as that of marble.

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Solution

The correct option is C Marble is a good conductor of heat.

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Similar questions

Q. What is the ratio of the total cost of wooden flooring to the total cost of marble flooring?

Q. Study the following information and answer the questions given below:

The premises of a bank are to be renovated. The renovation is in terms of flooring certain areas that are to be floored either with marble or wood. All rooms/halls and pantry are rectangular. The area to be renovated comprises of a hall for customer transaction measuring 23m

\times

29m, branch manager’s room measuring 13m

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17m, a pantry measuring 14m

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13m, a record keeping cum server room measuring 21m

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13m and locker area measuring 29m

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21m. The total area of the bank is 2000 square meters. The cost of wooden flooring is 170/- per square meter and the cost of marble flooring is 190/- per square meter. The locker area, record keeping cum server room and pantry are to floored with marble. The branch manager’s room and the hall for customer transaction are to be floored with wood. No other area is to be renovated in terms of flooring.

What is the respective ratio of the total cost of wooden flooring to the total cost of marble flooring?

\times

29m, branch manager’s room measuring 13m

\times

17m, a pantry measuring 14m

\times

13m, a record keeping cum server room measuring 21m

\times

13m and locker area measuring 29m

\times

21m. The total area of the bank is 2000 square meters. The cost of wooden flooring is 170/- per square meter and the cost of marble flooring is 190/- per square meter. The locker area, record keeping cum server room and pantry are to floored with marble. The branch manager’s room and the hall for customer transaction are to be floored with wood. No other area is to be renovated in terms of flooring.

What is the percentage area of the bank that is not to be renovated?

Q. Find the cost of flooring a square room of side

10 m

with marble titles

25 c m \times 20 c m

at the rate

R s 7.50

per title

Question 3
Alida runs her toy car on a dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be
(a) wet marble floor, dry marble floor, newspaper and towel.
(b) newspaper, towel, dry marble floor, wet marble floor.
(c) towel, newspaper, dry marble floor, wet marble floor
(d) wet marble floor, dry marble floor, towel, newspaper

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