When the temperature of ice-cold water is increased slightly, does it undergo a net expansion or net contraction?

1 answer:

4 0

From the freezing temperature up to about 4°C (39°F) the water CONTRACTS. That is, it becomes MORE dense. I think I read that water is the ONLY known substance whose solid phase floats in its liquid phase. That's why the cubes float in your soda and bergs float in the ocean. And if weren't so, then life on Earth would not be possible ! Oceans and lakes would freeze from the bottom up, ONE TIME, and then never thaw again.

You might be interested in

________ reaction time involves selecting a specific and correct response from several choices when presented with several diffe

lukranit [14]

Simple reaction time involves selecting a specific and correct response from several choices when presented with several different stimuli. This is very important because historically, this was the first indicators of intelligence pioneered by Francis Galton. To measure one’s intelligence is to know how he quick a person could respond to the stimulus with an already expected response wherein the stimulus is given unknown to the receiver. In other terms, the intelligence is measured on how quick a person could grasp certain concepts and how he could think fast and answer them correctly. <span> </span>

4 0

3 years ago

Read 2 more answers

Why is a flask is wider on the bottom than on the top? allows for a more precise measurement allows for better thermal equilibri

Genrish500 [490]

Answer:

allows for better thermal equilibrium

Explanation:

Due to the cone shape, most of the liquid will be closer to the bottom than the top. The large surface area of the bottom allows for faster heating.

8 0

2 years ago

Concept Development

Ostrovityanka [42]

Answer:

The answer is below

Explanation:

The main difference between a liquid and a gas is that when a liquid is under pressure, its volume "won't change apparently. The reason is that the distance between the molecules of a liquid is relatively small, and the molecules of a liquid extensively withstand the compressive forces. This is similar to the distance between the molecules of a solid."

3 0

3 years ago

Three identical springs, each with stiffness 1200 N/m are attached in series (that is, end to end) to make a longer spring to ho

OLga [1]

<h2>Answer:</h2>

400N/m

<h2>Explanation:</h2>

When n identical springs of stiffness k, are attached in series, the reciprocal of their equivalent stiffness (1 / m) is given by the sum of the reciprocal of their individual stiffnesses. i.e

$\frac{1}{m}$ = ∑ⁿ₁ [ $\frac{1}{k_{i}}$ ] -----------------------(i)

That is;

$\frac{1}{m}$ = $\frac{1}{k_{1}}$ + $\frac{1}{k_{2}}$ + $\frac{1}{k_{3}}$ + . . . + $\frac{1}{k_{n}}$ -------------------(ii)

If they have the same value of stiffness say s, then equation (ii) becomes;

$\frac{1}{m}$ = n x $\frac{1}{s}$ -----------------(iii)

Where;

n = number of springs

From the question,

There are 3 identical springs, each with stiffness of 1200N/m and they are attached in series. This implies that;

n = 3

s = 1200N/m

Now, to calculate the effective stiffness,m, (i.e the stiffness of a longer spring formed from the series combination of these springs), we substitute these values into equation (iii) above as follows;

$\frac{1}{m}$ = 3 x $\frac{1}{1200}$