Category: Physics

Is hot or cold heavier? Cold air is always heavier than an equal volume of hot air. “Air” is actually a mixture of several gases. Which is more heavy hot water or cold water? Cold water is denser than hot water. Therefore, it is cold water that is heavier than hot water (for equal volumes […]

Are wolves endangered 2020? Gray wolves are no longer an endangered species in the continental United States, the U.S. Fish and Wildlife Service announced today, likely setting off a flurry of lawsuits by wolf advocates who believe the decision is premature. Wolves only occupy 20 percent of their historic range throughout North America. When did […]

Can you get STDs from birth control? Women using contraceptives tend to be more sexually active and to have multiple sex partners than their counterparts and hence are at a greater risk of sexually transmitted diseases (STDs). Oral contraceptives (OCs) appear to protect against PID but may increase the risk of lower genital tract chlamydial […]

How fast can a hockey puck go when hit? 100 miles per hour What do hockey players do with the puck? A team will dump the puck in mainly for two reasons: to give time for their team to change lines while the game is going on, and as a strategy for an offensive attack […]

Can a metalloid be a gas? Metals, Metalloids, and Nonmetals. Nonmetals are (usually) poor conductors of heat and electricity, and are not malleable or ductile; many of the elemental nonmetals are gases at room temperature, while others are liquids and others are solids. The metalloids are intermediate in their properties. What is another name for […]

Is 0.75 repeating or terminating? Solution. Step 2: We find that on long division 34=0.75 which is a terminating decimal. Is expressed as a terminating decimal? A terminating decimal, true to its name, is a decimal that has an end. For example, 1 / 4 can be expressed as a terminating decimal: It is 0.25. […]

Is anyone singular or plural? Indefinite pronouns that end in -one are always singular. These words include anyone, everyone, someone, and one. Indefinite pronouns that end in -body are always singular. These words include anybody, somebody, nobody. Which is correct everyone or everybody? There is no difference in meaning between everyone and everybody, but everyone […]

What is the function of potential barrier? In quantum mechanics, the rectangular (or, at times, square) potential barrier is a standard one-dimensional problem that demonstrates the phenomena of wave-mechanical tunneling (also called “quantum tunneling”) and wave-mechanical reflection. What is the built-in potential barrier? The significance of this built-in potential across the junction, is that it […]

What is the pH at half equivalence point? Using the total volume, we had 0.0333 M HA and 0.0333 M A-. At the half-equivalence point, pH = pKa when titrating a weak acid. After the equivalence point, the stoichiometric reaction has neutralized all the sample, and the pH depends on how much excess titrant has […]

What is marginal utility with example? There is often something extra satisfying about obtaining or using more than one of a certain item, whether that item is a can of soda, a pair of jeans, or an airline ticket. The extra satisfaction is an economic term called marginal utility. What is marginal utility formula? In […]