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Vision Health

A step-by-step “how-to” instruction.

You will need a large cardboard [...]

cytoplasm is a watery fluid that fills the inside of a cell, it flows through the cell transporting materials to different parts of the cell.

Instead of just stating his own personal opinions John Dalton cited evidence to support his atomic theory.

The giving of evidence – which could be proved or disproved by others – was what soon resulted in his theory being accepted by scientists.

Answer

Warm water not only helps to kill bacteria that naturally grows on the skin, but it also helps to open the pores getting any kind of face wash deep into your skin.

1. Do not pick, press or rub your pimples. These actions actually increase the sebum production and rupture the membranes below your [...]

The oils in the peanut will be displaced by the water and the nut will get very soggy. If it is in the shell, the shell will get soft and it will take longer for the nut to go soggy.

Answer

phosphorescent is glowing in the dark;reusing old light it has stored, like a glow in the dark keychain

fluorescent is something that glows when energy is applied to it, such as the fluorescent lightbulb

Answer

As the name implies, phosphorescent comes from the element phosphorus. Many other substances which are not phosphorus can fluoresce [...]

Answer

This is the maximum distance the atoms can be placed away from each other. If you change any of the angles, some of the atoms will be closer together and will experience steric repulsions. By placing the atoms 109.5 degrees apart, you minimize steric repulsions and free energy.

Edit (AY12345): You know the [...]

Although commonly labeled the “worst greenhouse gas,” carbon dioxide is not the most effective greenhouse gas. However, because it has the highest concentration in the atmosphere compared to all the other greenhouse gases that human emit (except water vapor), it is the one that has the biggest impact.

However, on a “per molecule” basis, many [...]

Answer

its is the air inside the tennis ball that you should be concerned with. Cold air is compressed and gives the ball less bounce, hot air is less dense and pushes on the sides of the tennis ball from the inside. Another important factor is altitude. altitude changes the amount of [...]