Question

7. Why is ice at 273 K more effective in cooling than water at the
same temperature?
Qora
hoiling water or steam?
detailed answer pls​

Answer 1

Required Answer:

☑ At 273 K, ice absorbs more heat than water from the substance to overcome the latent heat of fusion and thus providing a more effective cooling effect. Water however does not absorb any extra heat from the substance. Thus, ice is more effective in cooling than water at 273 Kelvin.

Answer 2

Answer:

If time for first stone ist, time for second stone is t−1

s=49m is the same for both stones, u=0 for first stone

v

2

=u

2

+2as

v

2

=0+2(9.8)(49)

v=31m/s

v=u+at

31=0+9.8t

t=3.16s

t

′

=2.16s

s=ut+0.5at

2

49=u

′

(2.16)+0.5(9.8)(2.16)

2

u

′

=12.1m/s

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