Question

What was done in the "Heat Transfer" lab after placing blocks of ice on different materials?

Answer 1

Answer:

observing melting times to see which materials made good insulators

Explanation:

In heat transfer lab we need to determine that which material is a good conductor of thermal energy

so here we will find that thermal conductivity with the rate of thermal energy.

As we know that we put a ice cube on different material

so here the thermal energy will help to melt the ice

So here we can say that

rate of energy = $\frac{dQ}{dt}$

now we have

$\frac{dQ}{dt} = L\frac{dM}{dt}$

here L = latent heat of fusion

also we know that

$\frac{dM}{dt}$ = rate of mass melting

so if we measure that how much ice is melting with respect to time then we can find the rate of energy and hence we can find the thermal conductivity of the material

so correct answer will be

observing melting times to see which materials made good insulators

Answer 2

One pitcher contains 12 glasses of lemonade . And she serves 4 glasses of lemonade .

It is given that remaining number of glasses of lemonade = g

And we need to write an solve an equation , which gives the value of g.

And g equals to the difference of total lemonade and served lemonade, that is

So she can serve 8 more glasses of lemonade .