Science

Refine Search

Why does thunder come before lightning?

The shape of a lightning bolt and the ground terrain affect the sound of thunder. Rolling thunder is created when the shock waves of a forked bolt bounce off each other, the nearby terrain and clouds. A single boom of thunder is often the result of a single, vertical bolt. However, not all lightning creates thunder. In 1885, the Washington Monument was struck several times, but observers didn't hear any thunder.

Continue Reading

What are examples of convection in everyday life?

Thermal energy refers to the overall arbitrary movement of molecules in a body. It forms a direct relationship with temperature that is driven by the amount of random motion in an object, which in turn corresponds to the number of molecules moving within a system. Thermal energy is also known as internal kinetic energy.The transfer of thermal energy from one body to another is the result of temperature variations. Heat moves along areas of higher temperature to areas of lower temperature. The three mechanisms for heat transfer include conduction, convection and radiation. Conduction takes plac..

Continue Reading

How do I make a clay volcano?

To make a clay volcano, a mixing bowl, baking soda, vinegar, dish soap, 2-liter plastic bottle, funnel, measuring spoon, measuring cup, flour, salt, cooking oil and water are necessary. First, the clay must be made. To do so, combine 6 cups of flour, 2 cups of salt, 4 tablespoons of cooking oil and 2 cups of water in a mixing bowl. Knead the clay until it is firm and dry.\nNext, the clay must be formed around the plastic bottle and shaped to appear like a volcano. With the funnel, place 3 tablespoons of baking soda into the plastic bottle, a few drops of dish soap and one-half cup of water.\nT..

Continue Reading

Is there life on Mars?

There is some scientific controversy around this question. In 1996, NASA announced that scientists had recovered a Martian rock that fell to earth, which had fossilized evidence of microbial life. While there were both fervent supporters and skeptics, more research was performed and fewer experts agreed that the rock contained fossils.\n\nThere are other areas of research that suggest that Mars may once have sustained life. In 2014, NASA announced that its Curiosity rover, which worked to gather geographical and geological data on Mars, had found evidence of methane gas on Mars. The methane w..

Continue Reading

How does temperature affect what a gallon of propane gas weighs?

Propane is closely associated to petroleum and natural gas, which are types of fossil fuels created from the petrified remains of prehistoric organisms. It is a colorless, odorless compound with the chemical formula C3H8. Propane is the primary component in liquefied petroleum gas, or LPG, that is widely used in the United States.Propane normally exists in nature as a gas. However, it can be converted into its liquid form when subjected to increased pressures or reduced temperatures. Due to its high compressibility, propane gas is commonly stored in LPG containers in its liquefied form, which ..

Continue Reading

What is the formula of copper oxide?

Copper(I) oxide has a formula of Cu2O. This means each molecule of copper(I) oxide has two atoms of copper and one atom of oxygen. This compound is also known as cuprous oxide. Copper(II) oxide has a formula of CuO. Every molecule of this compound has a one-to-one ratio of copper to oxygen. Copper(II) oxide is also called cupric oxide. Both forms of this compound have applications in the manufacturing and agricultural industries.

Continue Reading

What is cyclic phosphorylation?

For cyclic phosphorylation to occur, a certain series of events is necessary. Some of the important conditions of cyclic phosphorylation are that only photosystem I is used and that the active reaction center is P700. Another necessary factor is that the electrons travel back to photosystem I. When the electrons are charged by absorbing light, they begin to shoot out of photosystem I, which begins the process.\nOnly ATP is produced as a result of cyclic phosphorylation. Photolysis, also known as water splitting, does not occur during cyclic phosphorylation. Also, it is important to note that o..

Continue Reading

What is the vapor pressure of water at 25 C?

Another formula for calculating the vapor pressure of water is log10P = A - B/C+T. The temperature in Celsius is represented by T. The vapor pressure in mmHg is represented by P. Three constants are required to use this formula. For temperatures between 1 and 100 degrees Celsius, A = 8.07131, B=1730.63 and C=233.426. For temperatures between 99 and 374 degrees Celsius, A= 8.14019, B= 1810.94 and C= 244.485.

Continue Reading

How fast does sound travel through water?

Despite the speed of sound being higher in water it is easier for humans to hear sounds through air. This is partly because the eardrums cannot vibrate when the outer portion of the ear is filled up with water. The type of vibrations human ears use to hear sound under water are also less effective than those they use in air. Sound waves travel even faster through solids than through liquids or gases.

Continue Reading

What are some different forms of biometric identification?

Biometric devices are typically used to protect computer devices and locations from unauthorized access. The user is required to produce the requested biometric data, either by holding the appropriate body part to a scanner or by producing a voice sample. An authorizer can require users to pass multiple biometric tests.\nThe downside of biometrics is that an authorizer cannot remotely allow access to the device or location for another person. The authorizer must appear in person to gain access.\nThere are ways to bypass biometric systems. People can copy fingerprints, and they can record voice..

Continue Reading
Showing 7861 to 7870 of 10000 (1000 Pages)