Category: Physics

What happens when you add 2 sine waves? First, let’s take a look at what happens when we add two sinusoids of the same frequency. Adding a sine and cosine of the same frequency gives a phase-shifted sine of the same frequency: In fact, the amplitude of the sum, C, is given by: Notice that […]

What is the period of 50 Hz? 0.02 s What is the period of a 50 Hz sine wave? The period of a 50 kHz sine wave is 2 x 10-5 second. What is the period of a 60 hertz sine wave? The time between two identical points on a sine wave is called the […]

What are the needs of sustainable development? Seventeen goals were set: to end poverty; zero hunger; quality education; gender equality; clean water and sanitation; affordable and clean energy; decent work and economic growth; industry innovation and infrastructure; reduced inequalities; sustainable cities and communities; responsible consumption and production; … What are the challenges of sustainable development? […]

Are studs every 12 inches? If you don’t have a stud finder, there are several methods that can be effective in finding studs. When a home is framed, the wall studs are usually spaced 16 or 24 inches apart. If you start in a corner and measure out 16 inches and you don’t find a […]

What is a good heat insulator? Plastic, rubber, wood, and ceramics are good insulators. These are often used to make kitchen utensils, such as saucepan handles, to stop heat from flowing up to burn the cook’s hand. Plastic coating is also used to cover most electrical wires in appliances. Air is also a good insulator […]

Can skeletal muscle repair itself? It has been known for more than a century that skeletal muscle, the most abundant tissue of the body, has the ability to regenerate new muscle fibers after it has been damaged by injury or as a consequence of diseases such as muscular dystrophy (1). Which cell types is responsible […]

What three consecutive numbers have a sum of 72? We are told the sum of x, x+2, and x+4 is equal to 72. x = 22. This means that the integers are 22, 24, and 26. What 3 consecutive numbers equal 81? To check, 26+27+28 = 81. What is the sum of 33? Therefore, 561 […]

What is a laboratory thermometer used for? Laboratory thermometers are devices used to measure temperature. There are many types of lab thermometers such as differential, mechanical, logging, etc. Laboratory thermometers are progressively providing digital reading displays and are input-capable to computer and software programs for logging purposes. Which one is filled in thermometer? Mercury Which […]

How do you say per someone? 2 Answers I’ve always read it as “on behalf of.” “According to,” works most of the time, but “as laid down by,” seems to translate better as “on behalf of.” – xdumaine May 31 ’11 at 14:34. “On behalf of” is usually rendered per pro or pp, as when […]

What determines how much products you can make in the chemical reaction? The theoretical yield for a reaction is calculated based on the limiting reagent. This allows researchers to determine how much product can actually be formed based on the reagents present at the beginning of the reaction. The actual yield will never be 100 […]