Science Experiments

Well if you place blue litmus paper in saliva and it turns red, then the saliva is acidic. If you put red litmus in the saliva and it turns blue, then the saliva is alkaline. However, if the red litmus doesn't change colour and the blue litmus doesn't change colour, the saliva would be neutral.

no it will only heat the bottle up

I think that a hypothesis is exactally that.

While we consider the pendulum experiment, we consider so many assumptions that the string is inelastic and there is no air friction to the movement of the bob.

With all these, we derive the expression for the time period of the pendulum as

T = 2 pi sqrt (l/g)

Here, in no way, mass of the bob comes to the scene.

So, mass of the bob does not have any effect on the time period or its reciprocal value, namely, frequency. ie number of swings in one second.

Sweet or Sour, A Lemon Experiment

To eliminate the possibility of hidden or unknown variables the scientist must a control experiment.

Heck to the no...

no UNLESSSS u use googles :D

Surface tension is important to water striders because surface tension gives them the ability to float and not sink and drown.

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I am just going without research on this, but you could test different types of golf balls and see the results and what golf balls work for different people. You research the way the golf ball compresses as well.

hope this helps!

A+= a regular marker

The storage areas of a cell are called vacuoles. They are typically enclosed by a membrane and store food, excess water, or waste.

In order to impart the greatest momentum to an object, you should both exert the largest force possible upon the object in question and extend that force for as long as possible.

This is so because the greater the force acting on an object results in a greater change in velocity, which in turn yields a greater momentum.

In addition to exerting the largest force possible on an object, you should also extend that force over the longest period of time as possible, as the sustained force also produces more momentum.

As p= m•v, the best method in obtaining the greatest amount for 'p' would be to manipulate either the 'm' or 'v' variables.

Force= acceleration= change in velocity= MOMENTUM.

Greater amount of time= MOMENTUM

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Breath In, Breath Out

In and Out

The van't Hoff factor for AlCl3 is 4. AlCl3 dissociates into Al3+ and 3Cl- ions when it dissolves in water, resulting in a total of 4 ions in solution per formula unit of AlCl3.

you should distille the water ( heat the water so it evaporates and let it condensate into a cup or a mirror)

light coloured candles do burn faster than darker coloured candles for one main reason. The darker the candle, the more dye molecules are involved in the candle which are non-flammable. Therefore, the lighter the candle, the less dye molecules are involved minimising the risk of the dye molecules interfering with the combustion process.

The amount of energy needed to vaporize 175 g of water depends on the temperature of the water. However, we shall assume it is 100 degrees C. We multiply 175 by 539 and get 94,325 calories. (Notice the small c). We could express it as 94 Calories if we were talking about the stuff on your dining room table.

The use is to neutralise the sting or bite.

By Julia

hydroweed