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How many bones are in an infant's body?

During ossification, many infant bones fuse together to form larger or longer bones. At the end of the process the human body contains a total of 206 bones. The femur, also known as the thigh bone, is the longest with an average length of 20 inches. The smallest bones are found in the inner ear.

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How are physical and chemical properties similar and different?

The transformation of a material does not necessarily mean that its properties change from physical to chemical in composition. When materials change from solids to liquid vapors, for instance, they do not become different substances; only their shape and states change. For example, ice, liquid water and water vapor are all still considered water, just in different forms. When materials undergo phase transformations, their physical properties change. Phase is a physical property of matter, and it may exist in one of four classical phases: solid, gas, liquid and plasma. Phase transitions ordina..

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What are pulleys used for?

Pulleys can be used in many other instances. They can be attached to cranes, for instance, to lift extremely heavy objects that humans otherwise wouldn't be able to move. Pulleys can also be realigned to change the direction of the applied force.When using a pulley, certain terms are commonly used. "Load," for example, is the word meant to signify the weight of an object being handled by the pulley. "Effort" is commonly used by engineers to refer to the amount of force that will be required to handle the load, or weight.Pulleys can be used to lift very large loads when they increase in nu..

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Why do waves increase in height as they approach the shore?

The way the wave breaks depends on the shape and slope of the ocean floor. They generally break as "a spilling, plunging or surging breaker," according to Coastal Care. Wide flat beaches form spilling breakers that appear to crumble as they move. A slightly steeper slope causes the crest to curl in a plunging breaker. This curling wave is the type surfers seek. When there is a very steep coastline, waves do not have the opportunity to break before hitting the shore and reflect back into the water, causing surging waves of water.\nWaves do not cause water to travel. Instead, they move energy th..

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Where do monoglycerides and diglycerides come from?

Monoglycerides and diglycerides help oils and water mix together smoothly, and they prevent oil from escaping peanut butter. They constitute less than 1 percent of an average person's food intake and act as a small part of someone's dietary fats. Individuals who want to know more about them can check the food label, as they are usually around the 4th listed ingredient.Some of the products monoglycerides and diglycerides appear in include chewing gum, baked goods, ice cream, shortening, whipped cream, margarine and toppings. Individuals who are concerned about their food's vegeta..

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Why do we need oxygen?

Humans need oxygen to provide nutrients to all of the cells in their bodies. If tissues and cells go without oxygen, then they begin to die quickly. For example, brain cells can only go without oxygen for three minutes before they begin to die. After three minutes of no oxygen, permanent brain damage begins to spread throughout the brain's tissues.\nThe body also needs energy in order to function properly. The human body uses the compound ATP for chemical energy for all of its cells and tissues. Cells must synthesize the ATP that they need in order to function properly, and they do so thr..

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What is a normal heart ejection fraction?

When the heart relaxes, two chambers known as ventricles fill with blood, notes Dr. Grogan. When the heart contracts, this blood is pumped out into the rest of the body. However, even the most forceful of contractions cannot empty these heart chambers of all the blood. For this reason, a heart ejection fraction refers to the amount of blood a heart pumps out at each contraction. The heart ejection fraction is only taken at the left ventricle as it is the heart's primary pumping chamber.\nFor this reason, the measure is referred to as the Left Ventricle Ejection Fraction, or LVEF, notes th..

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What are some interesting facts about the brain?

Scientists attempting to understand the brain have focused on the idea of mapping it, creating a diagram of the network and interactions of neural structure. Many scientists, instead of directly studying the human brain, focus on studying the simpler brains of smaller organisms, chiefly invertebrates. A modern advance has been termed the "Brainbow," which uses techniques of Golgi staining and genetically "tagging" neurons to produce colorful fluorescent diagrams of brain activity.\nWhen the nervous system and the brain encounter a sensation, the sensory input results in a series of electrical ..

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What is a cold fusion reactor?

Fusion is the reaction that drives the sun and other stars. Under intense pressure and heat, atoms crash into each other and form new elements from the fusion of their particles. This process releases enormous amounts of energy, which is why scientists have attempted to develop a nuclear fusion technique that does not require or produce millions of degrees of excess heat.

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What are some interesting facts about palm trees?

Palm trees come in a variety of shapes and sizes, with more than 2,500 species from the desert yucca palm to the tropical coconut palm. One of the tallest palms is the Quindio wax palm, a tree native to Colombia that grows nearly 200 feet tall. The coco de mer palm is one of the largest trees, producing seeds that weigh up to 66 pounds with a 2-foot diameter.\nPalm trees play a critical part in Palm Sunday and Easter celebrations for Christians and have religious significance in Judaism and Islam. Palm trees are an important food source, producing edible fruits such as dates, coconuts and acai..

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