Category: Physics

Will entropy ever stop increasing? Entropy is the loss of energy available to do work. Another form of the second law of thermodynamics states that the total entropy of a system either increases or remains constant; it never decreases. Entropy is zero in a reversible process; it increases in an irreversible process. Why is entropy […]

What is a soft shadow? Figure 3.20 Hard-edged shadows indicate light from a small point source. In many cases, using soft shadows (which are less distinct and fade off toward the edges, as in Figure 3.21) for some of your lights tends to look more realistic than using only hard shadows. How do shadows change […]

What kind of energy is involved when ice melts? kinetic energy What happens to potential energy while the water is melting? When ice or any other solid melts, its potential energy increases. Indeed, this is the only increase in energy, since the thermal kinetic energy, or temperature, does not increase while melting. At each phase […]

What are 4 types of air masses? There are four categories for air masses: arctic, tropical, polar and equatorial. Arctic air masses form in the Arctic region and are very cold. Tropical air masses form in low-latitude areas and are moderately warm. Polar air masses take shape in high-latitude regions and are cold. What are […]

How do you increase density of oil? What you can do is mix the oil with something else. A solution (two or more things mixed together) of oil plus another ingredient would increase the density of the oil. This is the same reason that salt water is heavier than fresh water, the weight of the […]

Why is C 14 not used to date dinosaur bones? But carbon-14 dating won’t work on dinosaur bones. The half-life of carbon-14 is only 5,730 years, so carbon-14 dating is only effective on samples that are less than 50,000 years old. To determine the ages of these specimens, scientists need an isotope with a very […]

What happens if you find dinosaur bones on your property? If you find a dinosaur fossil on private land, it’s yours to do with as you please. In the United States, the fossilized remains of the mighty creatures that lived in eons past are subject to an age-old law—”finders keepers.” In America, if you find […]

Is CF stronger than CCL? The C-F bond is shorter and stronger than the C-Cl bond, and shorter than single C–N and C–O bonds. The strength of the C-F bond is due to its partial ionic character, and due to electrostatic attractions between the partial charges on carbon and fluorine. Is CF a covalent bond? […]

What does the name halogen mean? Group 7A (or VIIA) of the periodic table are the halogens: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The name “halogen” means “salt former”, derived from the Greek words halo- (“salt”) and -gen (“formation”). Who are the members of halogen family? Halogen, any of the […]

Does TBI shorten your life? These changes may affect a person’s ability to function in their everyday life. Despite initial hospitalization and inpatient rehabilitation services, about 50% of people with TBI will experience further decline in their daily lives or die within 5 years of their injury. Do TBI patients sleep a lot? Conclusions: Sleepiness […]