- AIncreases.
- BDecreases.
- ✓Does not change.
- DSometimes increase and sometimes deceases.
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$(A)$ the rate at which heat is absorbed in the range $0-100 \ K$ varies linearly with temperature $T$.
$(B)$ heat absorbed in increasing the temperature from $0-100 \ K$ is less than the heat required for increasing the temperature from $400-500 \ K$.
$(C)$ there is no change in the rate of heat absorbtion in the range $400-500 \ K$.
$(D)$ the rate of heat absorption increases in the range $200-300 \ K$.

$(1)$ The rate at which the particle strikes the piston is $v / L$
$(2)$ After each collision with the piston, the particle speed increases by $2 V$
$(3)$ The particle's kinetic energy increases by a factor of $4$ when the piston is moved inward from $L _0$ to $\frac{1}{2} L _0$
$(4)$ If the piston moves inward by $d L$, the particle speed increases by $2 v \frac{d L}{L}$
