Category: Physics

What are the mobile electrons of a pure metal called? The Metallic Bond The electrons in the outer energy levels of a metal are mobile and capable of drifting from one metal atom to another. What metal can withstand 6000 degrees? Tantalum carbide (TaC) and hafnium carbide (HfC) are refractory ceramics, meaning they are extraordinarily […]

How visual information is processed in the brain? Visual information from the retina is relayed through the lateral geniculate nucleus of the thalamus to the primary visual cortex — a thin sheet of tissue (less than one-tenth of an inch thick), a bit larger than a half-dollar, which is located in the occipital lobe in […]

What tissue sends messages from brain to body? Neuron. Neurons allow the brain and body to communicate by relaying sensory information and motor commands as electric signals. The most complex workings of the nervous system depend on messages sent through neurons. Together with their support cells, neuroglia, neurons make up all nervous system tissue. How […]

Does regular participation in sports decrease stamina? Answer Expert Verified. It increases endurance. After learning and participating in sports regularly, you in crease your stamina, making 1 a wrong answer. While doing said sports, you increase your flexibility ans with the regular exercise, you do not gain fat but may lose some. What is an […]

What are the ends of a bar magnet called? A magnet has two ends called poles; one end is the north pole and the other is the south pole. A north pole will attract a south pole; the magnets pull on each other. But the two north poles will push each other away. What is […]

Does the moon have any satellites? Answer: I believe that there is only one known artificial satellite orbiting the Moon at the moment, that being the Lunar Reconnaissance Orbiter (LRO). The LRO is only about 5 meters in size, which would make it appear to be an unresolved point of light from Earth. What the […]

What was life like during the Paleozoic Era? By the end of the Paleozoic, cycads, glossopterids, primitive conifers, and ferns were spreading across the landscape. The Permian extinction, 244 million years ago, devastated the marine biota: tabulate and rugose corals, blastoid echinoderms, graptolites, and most crinoids died out, as did the last of the trilobites. […]

What are the 5 factors that influence physical fitness? 10 Physical Fitness Factors to Assess How Fit Are You Body composition. This basically refers to the relative level of muscle, fat, bones, and other vital elements of the body. Cardiovascular fitness levels. Flexibility. Speed. Power. Coordination. Balance. Agility. What are 3 factors that affect skill-related […]

Can you have a negative velocity and negative acceleration? An object which moves in the negative direction has a negative velocity. If the object is speeding up then its acceleration vector is directed in the same direction as its motion (in this case, a negative acceleration). Is friction force negative? So friction is a force […]

What are 3 characteristics of cyanobacteria? Defining cyanobacteria characteristics are a tolerance of extreme conditions and an ability to exist without vitamins. They use phosphorus, iron and other micronutrients, and ammonia or nitrate as a nitrogen supply. Some types of cyanobacteria are filamentous and don’t need sunlight. What does cyanobacteria do to humans? Exposure can […]