Category: Physics

How does the skin defend the body? The skin acts as an external barrier to bacteria, preventing infection and protecting the internal organs. The skin also protects the body from ultraviolet radiation using the pigment barrier formed from melanocyte cells found in the top of the papillary dermis and a protein layer found in the […]

Can we create an artificial sun? For many years, scientists have tried to recreate nuclear fusion on Earth. Instead, the artificial suns being created today are nuclear fusion reactors. In 2017, the German Aerospace Center (DLR) announced its creation of such a device. This reactor is called Synlight and reaches temperatures of 5432 °F (3000 […]

How do you calculate the angle between the reflected ray and the normal? When a light ray hits a surface normally, the angle between the incident ray and the normal is 0, so Θi = 0. Since the angle of reflection equals the angle of incidence, Θr= 0. By Snell’s law, ni sin Θi = […]

What process turns a gas into a liquid? When a gas changes into a liquid, it is called condensation. When a gas changes into a solid, it is called deposition . When a liquid changes into gas, it is called evaporation. Phase changes are usually caused by changes in temperature or pressure. What are the […]

What are idealized models? In physics, a model (or idealized model) is a simplified version of the physical system that strips away the unnecessary aspects of the situation. One thing that we don’t typically worry about is the physical size of the object, nor really it’s structure. What are models good for? Models use familiar […]

What is an example of homeostasis imbalance? A commonly seen example of homeostatic imbalance is diabetes. In a diabetic, the endocrine system has difficulty maintaining the correct blood glucose levels, so diabetics must closely monitor their blood glucose levels, as shown in Figure below. Which organ systems are the most important for maintaining homeostasis quizlet? […]

What are rude questions to ask? However, there are times that we have been asked questions that are not only impolite, but rude and hurtful….15 Rude Questions People Need to Stop Asking, Like RIGHT NOW! OMG! When are you getting married? What!!! How much money do you make? How old are you? Not working? What […]

How many solar farms are in Arizona? two community solar farms How is energy stored so that electricity can be generated when it is dark? “In effect, they behave as rechargeable thermal batteries: taking in energy from the sun, storing it indefinitely, and then releasing it on demand,” the scientists said. … Who is the […]

Does the coefficient of cubical expansion depend on original length? Answer: it is yes. Explanation:Does cubical expansivity depend upon initial volume of solid? Because we know cubical expansivity is equal to rise in increase in volume per unit initial volume per unit rise in temperature, where ratio of increase in volume and initial volume is […]

Can you vaporize lava? Can lava evaporate? No, not at the usual temperatures. It could possibly be heated to a temperature that would cause it to vaporize, but that would be far higher than the temperature is is at when it arrives at the earth’s surface. What temperature does rock turn to gas? The gas […]