Science

Refine Search

What does "barometer" mean?

Air pressure is different at different points on the planet and changes over time. In space, there is a nearly complete vacuum, so the air pressure is zero. On Earth, there are many miles of air molecules wielding pressure due to the force of gravity. Similarly, on any given day, air over a desert would be expected to have lower pressure than the air over an ice top.

Continue Reading

How are anatomy and physiology related?

The Carnegie Mellon University course description explains that the combined study of anatomy and physiology covers themes such as the body's maintenance of stability in its internal environment and the relationship between the body's structure and its functions. The study of anatomy and physiology also addresses the levels of organization in the body and the integrated function of systems in the body.\nAccording to the Human Anatomy and Physiology textbook from OpenStax College, a combined study of human anatomy and physiology is foundational for allied health and life sciences stud..

Continue Reading

What is the formula for potassium chromate?

Potassium chromate is an odorless lemon-yellow crystalline solid that is soluble in water. It is highly corrosive and a strong oxidizing agent. Due to its toxic nature, potassium chromate is a potential human carcinogen and an environmental threat.\nDespite its known hazards, potassium chromate is used in chemical analysis, enamels, metal rustproofing, leather finishing, chromium compounds, fungicide and pigments for paints and inks.

Continue Reading

What are the types of recyclable plastics?

The symbols and resin codes for polyethylene terephthalate and high-density polyethylene are PETE and HDPE, and 1 and 2 respectively. Polythene terephthalate is recycled into products such as bags, carpets and bottles, while high-density polyethylene is recycled into detergent bottles and drainage pipes.\nWhile the other types of recyclable plastics are not common in products found in homes, they are represented in the same manner and on the same resin code scale as polythene terephthalate and high-density polyethylene. The codes 3, 4, 5 and 6 found on plastic products to represent polyvinyl c..

Continue Reading

What is the chemical name for wood alcohol?

Methanol has been researched as a possible fuel to run vehicles. This compound comes from biomass, natural gas and coal. Methanol blended with gasoline creates a cleaner fuel than pure gasoline. Vehicles also perform better with this methanol/gasoline hybrid. Because methanol comes from renewable resources, it won't run out. Another benefit of exploring methanol as a fuel option is that it can be used to make hydrogen for hydrogen fuel cells. Some drawbacks of methanol are that it's less fuel efficient and costs more than gasoline.

Continue Reading

Who discovered radium?

The chemical symbol for radium is Ra, with an atomic number of 88. It belongs to the alkaline earth metal group of the periodic table. In its purest form, radium is a silver color. Once oxygen touches radium turns black. Radium is dangerously radioactive, therefore there are currently no commercial uses for the element. The name radium derives from the Latin word radius, meaning "ray."

Continue Reading

What is the nature of the universe?

One of the laws that governs the universe is that matter cannot be created, nor can it be destroyed; matter remains constant in the universe. The same can be said for the conservation of both mass and energy. Another set of laws is that of the four laws of thermodynamics, which describe the concepts of thermal equilibrium, the passage of energy into or out of a system, the increase in entropy, and the value of entropy at temperatures near absolute zero.

Continue Reading

Are ginko leaves good for you?

Ginkgo is distributed in two forms: extracts and dried leaves. The extract of ginkgo leaves is preferred because it allows doctors to standardize the amount of ginkgo administered and reduce toxic chemicals, called alkylphenols and ginkgotoxins, that can lead to numerous unpleasant side effects. Terpenoids, the chemicals in ginkgo that are considered healthy, dilate the user's blood vessels and increase the flow of oxygen and nutrients throughout the body, but they prevent clotting, which can lead to complications for people suffering from certain health problems. Individuals should consu..

Continue Reading

Does baldness come from your mother's father?

Despite this research, hair loss has a number of other mitigating factors that affect how it progresses. Age is one major factor affecting hair loss. A man's chance of hair loss increases to about half when he passes the age of 50. Hair loss is actually related to an excess of the male hormone testosterone, which would normally produce more body hair, save for on the head, where it shows up as less.\nSymptoms of hair loss typically come in the form of pattern baldness. This can include thinning hair, a receding hair line from the front to the back, a hair loss progression in an M pattern,..

Continue Reading

What is the density of cooking oil?

Density towers are a simple science project that can be used to demonstrate the different densities of substances and particularly cooking oil. To create a density tower, several liquids are carefully poured into a clear container one at a time with the densest liquid at the bottom and the lightest liquid at the top. Because of the different densities, each liquid forms its own layer that doesn't mix with the others. For example, canola oil could be stacked on top of corn syrup which in turn is stacked on top of honey.

Continue Reading
Showing 3531 to 3540 of 10000 (1000 Pages)