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  4. Mode of transfer of heat in which heat is carried by moving particle is

Q. Mode of transfer of heat in which heat is carried by moving particle is

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Solution:

Correct answer is (c) convection

Questions from KCET 2022

1. A truck of mass $0.5$ Ton is moving with a speed of $6\, ms ^{-1}$. Sand is poured at the rate of $10\, Kg$ per minute. How much force is needed to keep it moving with the same speed?

2. A horizontal force $F$ is applied on a block of weight $W$ to hold against a vertical wall. The minimum value of force needed to hold the block if the coefficient of friction of the surface is $\mu$

3. A bird is inside a wire cage hung from a spring balance. The spring balance reading is $R_{1}$ when the bird is flying and $R_{2}$ when it is at rest inside the cage. Which of the following is correct?

4. 6. An ideal heat engine gives out heat at $77^{\circ} C$ to have a $30 \%$ of efficiency. The temperature of the source is

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