All categories

3 years ago

Explain why the temperature for freezing point and boiling point are the same.

2 answers:

7 0

We have to wonder what substance you're working with. Under normal, human environmental conditions, there are almost no substances that freeze and boil at the same temperature.

However, EVERY substance has SOME temperature, at some pressure, at which it "sublimes" ... passing directly from solid to gas, or from gas to solid, without existing in liquid form in between. Even water does that, if the conditions are right.

kobusy [5.1K]3 years ago

4 0

If you are referring to the rules of Celsius, that applies. Since the freezing point of water in Celsius is 0 degrees and the boiling point of water is 100 degrees, it can be said that the to share an equal distance from each other. (100-100=0 and 0+100= 100) You would have to gain or lose 100 so they both gave the same distance from each other.

You might be interested in

Lisa is conducting an investigation to determine the coefficient of friction between two surfaces. She uses a 25 kg block. What

Paladinen [302]

Answer:

245.25

Explanation:

1 kg is 9.81 newtons

4 0

3 years ago

Read 2 more answers

4. A motorist travels 406 km during a 9.0 hr period. What was the average speed in km/hr and m/s?

user100 [1]

Answer:

45.11 kmph and 12.530 m/s

Explanation:

Average speed = Total distance travelled / Total time taken

406/9 gives the answer in kilometers

And we convert it to m/s by multiplying it with 1000/3600

6 0

3 years ago

Two balls of unequal mass are hung from two springs that are not identical. The springs stretch the same distance as the two sys

IRISSAK [1]

Answer:

b) Springs oscillate with the same frequency,

Explanation:

expression for frequency of vibration of mass hanging from a spring is given as follows

f = $\frac{1}{2\pi} \times \sqrt{\frac{k}{m} }$

k is force constant of spring and m is mass vibrating .

In the present case, if mass stretches the spring by x and remains balanced

mg = k x

$\frac{k}{m} =\frac{g}{x}$

g and x are same for both cases

$\frac{k}{m}$ will also be same for both cases .

Hence frequency of vibration will also be same for both the balls .

4 0

3 years ago

Calculate the equivalent resistance for both circuits. Series circuit: 2 Ω and 4 Ω Parallel circuit: 2 Ω and 4 Ω Which circuit h

goldenfox [79]

Equivalent resistance is also known as the overall resistance.

For resistors in a series circuit, the total resistance is computed using the formula:

$R_{T} = R_{1}+ R_{2}+ R_{3}... R_{n}$

In other words, you just add up the resistance of each resistor in the series circuit. In your case you only have two resistors. You have 2Ω and 4Ω. So all you need to do is add that up.

$R_{T} = R_{1}+ R_{2}$
$R_{T} = 2 + 4=6$

The total resistance of the series circuit is 6Ω

In a parallel circuit you get the total resistance using the formula:
$\frac{1}{R_{T}} = \frac{1}{R_{1}}+\frac{1}{R_{2}}+\frac{1}{R_{3}}...+\frac{1}{R_{n}}$

First you get the sum of all fractions and at the end take the reciprocal of the resulting fraction and divide. So let us take your problem into consideration where you have two resistors that have a resistance of 2Ω and 4Ω.

$\frac{1}{R_{T}} = \frac{1}{R_{1}}+\frac{1}{R_{2}}$
$\frac{1}{R_{T}} = \frac{1}{2}+\frac{1}{4}$
$\frac{1}{R_{T}} = \frac{2}{4}+\frac{1}{4}$
$\frac{1}{R_{T}} = \frac{3}{4}$

Get the reciprocal of the resulting fraction 3/4 and then divide. The reciprocal of 3/4 is 4/3.

4/3 = 1. 33Ω

So if you compare the equivalent resistance of the two circuits, the series circuit has a higher equivalent resistance.

3 0

3 years ago

Read 2 more answers

The photon energies used in different types of medical x-ray imaging vary widely, depending upon the application. Single dental

Alchen [17]

1. Single dental x-rays: $5.0\cdot 10^{-11}m$