Water changes shape to fill the shape of its container. what is the best explanation for this ?

Answers

Answer 1

Answer: The answer would be that it is a liquid. It does not have a definite shape. That is why is takes the shape of what ever container it fits into.

Answer 2

Answer: Liquids don't have a definite shape so that means it does not take shape of its contaner but, solids do for example when you put water in a bown and freeze it up then it will stay there. Hope i helped :D

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(b) Lorna then built a different circuit as shown below. How could Lorna get both bulbs to light at the same time in this circuit?

Answers

Lorna should close the switches S3 and S4,and leave them closed.
Then, both bulbs are controlled by S5.
When it's closed, they both light. When it's open, they're both off (dark).

A car is stopped at a red light. When the light turns green, the car startsaccelerating again. In the process, a cup of coffee sitting in a cup-holder spills
out onto the rear seats. Why does this happen?

Answers

Answer:

See the explanation below

Explanation:

This happens because the coffee was at rest, at the time when the car accelerates to move forward the container containing the coffee also accelerates in the same direction, the liquid when moving suddenly spills. The same will happen if the car slows down, any sudden movement changes will cause the coffee to spill, understood by sudden movements when it accelerates or slows down.

Answer:

This happens because of inertia.

Explanation:

Inertia is the ability of a body to remain in its state of rest or relative movement, while an external force is not acting on it.

It is when a body objects to modifying its state of relative rest or movement, including the speed and direction in which this happens.

When a car accelerates, a cup of coffee sitting in a cup-holder spills out onto the rear seats, because it has left its state of rest due to the acceleration force of the car.

Hi :) what’s the difference between conduction in metals & non-metals ? I know it’s the free electron diffusion thingy but I really don’t understand it at all. anyone able to help? Thank you!

Answers

The difference between metal and non-metal in terms of condition is explained below.

Explanation:

In metals, conduction occurs due to the aggregation of vibrations of molecules and free-electron distribution. While in non-metals, the mechanism for conduction is only atomic or molecular vibrations.
Apart from free electrons, there are phonons in metals as well as non-metals. Non-metals hold a confined amount of thermal conductivity only due to Phonons and Lattice vibrations.
Concerning atomic vibration in a solid thing (non-metals mainly), it is easier to know if one receives the fact that atoms are almost floating adjacent to one another depending on the covalent bonds between them.
When a metal is heated the electrons quickly respond to the heat and transfer it to the nearby atom or solid touching it. As non-metals don't possess free electrons, the heat transfer happens due to phonons (the excited state of the lattice structure vibrating uniformly).
In metals, this rarely plays a role as the electrons transfer most of the heat efficiently.

True or false the size of a population increase if the number of individuals added to the population is equal to the numbers of individuals leaving the population?