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4 years ago

7

Which statement below best describes the properties of solids? A. Solids have both definite shape and definite volume. B. Solids

have definite volume but no definite shape. C. Solids have definite shape but no definite volume. D. Solids have no definite shape or volume.

1 answer:

Butoxors [25]4 years ago

7 0

The answer is A. Solids have both definite shape and denfinite volume.

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2. Imagine now that one tried to repeat the same measurement, but between the time that the warm water was measured and the time

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The final temperature is 64.28°C.

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Imagine now that one tried to repeat the same measurement, but between the time that the 400 cm³ of warm water was measured at 88°C and the time it was mixed with the 130 cm³ of cooler water at 15°C, the warmer water had lost 3060 cal to the environment. Calculate the final equilibrium temperature assuming no heat loss after mixing occurs.

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Using formula of energy

$Q=mc\Delta t$

$Q=V\times\rho\times c\times(T_{2}-T_{1})$

Put the value into the formula

$3060=400\times1\times1\times(88-t)$

$3060=400\times88-400t$

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Using formula of temperature

$T_{f}=\dfrac{V_{w}T_{w}+V_{c}T_{c}}{V_{w}+V_{c}}$

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Hence, The final temperature is 64.28°C.

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4 years ago