Science

Refine Search

Where do most tsunamis occur?

According to researchers at Geoscience Australia, a tsunami hits the Australian coast every couple of years. Tsunamis also have a history of landfall in Sri Lanka, Sumatra and India. Scientists expect tsunamis to eventually form in the Caribbean as well. Tsunamis occur due to the movement of tectonic plates in the ocean. The quick motion of the plates triggers the ocean water to move and down, which carries a wave for a long distance.

Continue Reading

How do you calculate angular momentum?

Einstein Online defines angular momentum, for an object orbiting a central point, as the product of the object’s mass times its distance from the axis times the velocity at which it orbits around the center. Angular momentum is understood as the momentum of rotation, or an object’s resistance to change in rotation. Angular momentum is a vector quantity requiring both magnitude and direction. The direction of the angular momentum vector is the same as the axis of rotation of the object using the right-hand rule, explains Real World Physics.\nEncyclopædia Britannica states that the total an..

Continue Reading

What is the melting point of paraffin wax?

Low melt point paraffin wax has a melting point of less than 130 degrees Fahrenheit, medium melt point paraffin wax melts between 130 and 150 degrees Fahrenheit and high melt point paraffin wax melts at temperatures greater than 150 degrees Fahrenheit. High melt point paraffin wax is primarily used for special candle-making processes, while low and medium melt point paraffin waxes are used for more typical processes.

Continue Reading

Are there any muscles in the human hand?

Among the muscles found in the hand are the opponens digiti minimi muscle, which runs along the outside of the hand, and the dorsal interosseous muscles, which are found at the top of the hand and help control the fingers. The flexor pollicis, abductor pollicis and opponens pollicis muscles are in the palm of the hand and control the thumb. The lumbrical muscles, which control the fingers, are also located in the palm.\nAdditional hand muscles include the dorsal interosseous muscle, which is located near the web between the thumb and the forefinger, as well as the abductor digiti minimi, the f..

Continue Reading

What causes a cliff to collapse?

The weather can naturally erode the foundations of a cliff, causing it to collapse. One of the most common examples of weathering is when rain fall affects the composition of the cliff. As rain falls, it seeps into the permeable gravel and soil, adding weight to the cliff. At the same time, colder winter temperatures can cause the face of this cliff to freeze. When these frozen areas thaw, they are weakened.Furthermore, if a cliff is against a body of water, waves can crash against the cliff, weakening it in time. Water can also naturally undercut a cliff by slowly eroding layers. With the wei..

Continue Reading

Which countries have had missions to Mars?

According to NASA, the former USSR made the first attempt in 1960 at a mission to Mars. The USSR sent two spacecraft, the Korabl 4 and Korabl 5, on flyby missions. These vessels, however, never left Earth's atmosphere, ultimately failing an orbital mission.The United States successfully sent the Mariner 4 to Mars in 1964, making it the first country reaching that planet. The Mariner 4 returned carrying over 20 photographs of Mars. The United States followed that mission with the launch of the Mariner 6 and Mariner 7 in 1969. These spacecraft retrieved over 100 new pictures of Mars.In 2003..

Continue Reading

Is rainwater safe to drink?

Much of the world's population uses rainwater for its source of drinking water. The amounts of impurities in rainwater, such as pollen, mold and pollution, may actually be less than contaminant levels in some public drinking water. Boiling rainwater and then filtering it are steps that can be taken to make rainwater safer to drink.

Continue Reading

What is a permanent dipole?

Polar molecules sometimes, but not necessarily, have a net charge equivalent to zero. Examples of such molecules, according to Pearson, are carbon monoxide and water. A property of polar molecules that are permanent dipoles is the possession of a permanent dipole moment, but dipole moments are not guaranteed solely by uneven distribution of charge. It is possible to affect permanent dipoles through other permanent dipoles as well as through ionic charges and induced dipoles.

Continue Reading

What is Jupiter's revolution time?

Jupiter is primarily made from hydrogen and around 10 percent helium. It has a central pressure that is 100 million times stronger than Earth's, and its temperature ranges between 23,432 and 63,032 degrees Fahrenheit. Unlike Earth's primarily solid mass, Jupiter is mainly a gas, with a small rocky center. Jupiter inclines at 13.1 degrees compared to Earth, and each rotational day lasts 9.97 hours. Its centripetal acceleration is 1.67m/s2, which allows it to rotate rapidly.While hydrogen does not act as an electrical conductor on Earth, the pressures found on Jupiter forces it to do s..

Continue Reading

What is the main function of the excretory system?

The excretory process begins when the liver creates bile, passing it into the gallbladder and on to the lower intestine. Bile begins to break down solid wastes and is capable of transforming substances, like ammonia, into less harmful urea. Bile also serves an important role in breaking down lipids, separating useful fats from waste products. Urea, salts, and nitrogen byproducts are absorbed into the bloodstream. Here they pass through to the kidneys and are filtered out into the bladder. Excess water may also be routed to the skin. There, it flows through sweat glands and evaporates, taking s..

Continue Reading
Showing 1391 to 1400 of 10000 (1000 Pages)