On a temperature versus time graph, how does the temperature at the beginning of a change of state compare with the temperature at the end of the change?always lower

always the same

usually lower

usually higher

Answers

Answer 1

Answer:

Answer:

The temperature is always same.

Explanation:

The change of state of matter occurs at the constant temperature, because the heat energy given to the matter is used to change the state in this condition.

So, in the beginning and at the end of the change, the temperature remains constant.

The graph between temperature and time is a straight line parallel to time axis as shown.

Answer 2

Answer:

Answer:

answer is B

Explanation:

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Name the apparatus used to measure friction force? PLEASE HELP AS SOON AS POSSIBLE

Answers

There is no apparatus for it. It is either use something like ruler and table and rub together or rub our hands, and friction force will be showed.

Where would you expect to find the centre of gravity of a plastic ruler?

Answers

Answer:

At center of ruler.

Explanation:

The center of gravity is defined as the point at which the object can be balanced. Due to different structure, weight and size, center of gravity changes from object to object.

In this case we have a plastic ruler which has a homogeneous structure, that means its weight is equally distributed through out. So its center of gravity must be at a point which is at equal distance from the both ends ( center ).

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What is it called when the air particles bunch up

Answers

Compression is your answer

Please need help with this one

Answers

op, here is a list of physical properties. Physical is things you can see.

What unsusual characteristic do the cysts of brine shrimps, the resurrection fern and Tardigrades. What adaptations do they have which enable them to survive when other organisms would die?

Any help would be much appreciated.

Answers

Brine shrimps can reproduce in two ways. 1) viviparious or live reproduction and 2) oviparious or production of eggs that hatch after being expelled from the body. The eggs, coated in chorion coating, are called cysts.

Through the reproduction of cysts, the survival of brine shrimps increase even when dealing in extreme conditions. The cysts can remain in total stasis for two years in oxygen less surroundings, they can survive freezing temperature and boiling tempreture. When conditions improve and eggs are placed in salt water, they hatch within a few hours and increase the population of brine shrimps.

Resurrection ferns are called as such because they resurrect after they shrivel, though the fern does not really die. In extremely hot or conditions, these ferns can lose 75% of their water content, even losing 97% water content if suffering under extreme drought, causing them to shrivel and look like dead ferns. But, when these ferns are again exposed to water, they resurrect and becomes green and healthy. This unusual ability help these ferns to survive under extremely harmful conditions.

Tardigrades are known as nature's toughest animals. They can live in solid ice, intense radiation of space, and boiling water. They can also survive in the desert for ten years without drinking water, as well as, in the deepest part of the sea. Their survival is based on their unusual characteristic to change their form to survive without water.

In the absence of water, tardigrades can completely dry out. The absence of water in their body urges them to replace it with a sugar called trehalose. Trehalose then becomes their source of life until water becomes available to tardigrades for consumption.

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