Explain how the air balloon moves up and down.<br> Explain in terms of density

A platinum resistance thermometer has a resistance of 11.50 ohms at 0 oC and 17.35 ohms at 100 oC. Assuming that the resistance

STatiana [176]

Answer:

$34.2^{\circ}C$

Explanation:

The resistance increases linearly with the temperature - so we can write:

$\Delta R = k \Delta T$

where

$\Delta R$ is the change in resistance

k is the coefficient of proportionality

$\Delta T$ is the variation of temperature

In the first part of the problem, we have

$\Delta R = 17.35 - 11.50 =5.85\Omega$

$\Delta T = 100 -0 = 100^{\circ}C$

So the coefficient of proportionality is

$k=\frac{\Delta R}{\Delta T}=\frac{5.85}{100}=0.0585 \Omega ^{\circ}C^{-1}$

When the resistance is $R=13.50\Omega$ , the change in resistance with respect to the resistance at zero degrees is

$\Delta R' = 13.50-11.50 = 2.00 \Omega$

So we can find the change in temperature as:

$\Delta T' = \frac{\Delta R}{k}=\frac{2.00}{0.0585}=34.2^{\circ}$

So the new temperature is

$T_f = T_0 + \Delta T' = 0+34.2 = 34.2^{\circ}C$

4 0

3 years ago

a 350 n force is required to accelerate a giant tortoise at 7 m/s2. what is the weight of the tortoise

irina1246 [14]

Answer:

50kg

Explanation:

mass = force/acceleration

50kg = 350/7

3 0

4 years ago

I have a 3 cc piece of aluminum with a density of steel with a mass of 24.0 g. I cut it into 2 equal pieces. How has the density

tresset_1 [31]

Answer:

What happens to the density of an object if the object is cut in half? ... The density remains the same because cutting the object in half will divide the mass & volume by the same amount. Also, the density of a substance remains the same no matter what size it is.

Explanation:

What happens to the density of an object if the object is cut in half? ... The density remains the same because cutting the object in half will divide the mass & volume by the same amount. Also, the density of a substance remains the same no matter what size it is.

3 0

3 years ago

When a lift is at the highest level it has the most ?

Olegator [25]

Answer:

kinetic energy

Explanation:

that I think

6 0

3 years ago

Read 2 more answers

A glass rod rubbed with a tissue paper would strip away electrons from the atoms in glass rod. This would acquire positive charg

Gemiola [76]

Answer:

when this charged glass rod is brought towards the metal ball it will acquire a charge opposite to that of charge body brought close to it without touching it but it will acquire the same charge if the charged object touches it

7 0

3 years ago

Explain how the air balloon moves up and down. Explain in terms of density