Category: Physics

What causes viscosity? Viscosity is caused by friction within a fluid. It is the result of intermolecular forces between particles within a fluid. What is viscosity and its causes? Causes of Viscosity Due to strong cohesive forces between the molecules, any layer in a moving fluid tries to drag the adjacent layer to move with […]

What level of radiation is harmful? To cause death within hours of exposure to radiation, the dose needs to be very high, 10Gy or higher, while 4-5Gy will kill within 60 days, and less than 1.5-2Gy will not be lethal in the short term. However all doses, no matter how small, carry a finite risk […]

What are 5 examples of non-renewable resources? Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy. Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs. What are the examples of renewable […]

What animals can see humans glow? Bioluminescent creatures such as glowworms, fireflies, and plankton are a popular subject with photographers with the low-light abilities of modern digital cameras. Are humans glow in the dark? The human body literally glows, emitting a visible light in extremely small quantities at levels that rise and fall with the […]

Does cool air push warm air upward? This type of front is called a warm front. It generates nimbostratus clouds, which can result in moderate rain. On the other hand, when a cold air mass catches up with a warm air mass, the cold air slides under the warm air and pushes it upward. What […]

What is the equation for total energy? Equations Equation Meaning in words E m = K + U E_\text m = K +U Em=K+U The total mechanical energy of a system is the sum of the total kinetic energy and total potential energy. How do you calculate time? To solve for time use the formula […]

What are some changes that can be caused by sound energy? Answer: Hearing loss due to sound energy damaging the nerve cells in the inner ear. Many animals behavior is influenced by sound energy. Sound energy causes the particles in the medium it is traveling through to vibrate. Unlike sound electromagnetic waves can travel trough […]

What are the 5 pathogens? Pathogenic organisms are of five main types: viruses, bacteria, fungi, protozoa, and worms. Some common pathogens in each group are listed in the column on the right. What can kill pathogens? Disinfectants are chemicals designed to kill harmful bacteria, viruses, and other germs. They can do so by breaking down […]

What is a good transition word? And, in addition to, furthermore, moreover, besides, than, too, also, both-and, another, equally important, first, second, etc., again, further, last, finally, not only-but also, as well as, in the second place, next, likewise, similarly, in fact, as a result, consequently, in the same way, for example, for instance. What’s […]

Why do whales moan? Various baleen whales moan, but only the males of a few species really sing well: humpback, minke, some blue and fin whales, and the more distantly related bowhead whales. It has been suggested that, when underwater, air can be moved between these sacs and the lungs, allowing whales to sing without […]