Category: Physics

Can I scrape plaque off my teeth? Brushing and flossing daily is really important because plaque quickly becomes tartar, and once it’s tartar, you can’t remove it on your own, or at least, you shouldn’t. Tartar build-up needs to be scraped off, and trying to do this at home can cause you to scratch the […]

How long does radioactive isotope stay in your body? The half-lives of radioisotopes used in medicine range from a few minutes to a few days. For example, rubidium-82, which is used for myocardial perfusion imaging has a half- life of 1.26 minutes, while iodine-131, used in thyroid treatment and diagnosis, has a half- life of […]

How much time will it take to learn physics? The thing with high-school physics is that if you know high-school mathematics very well and have atleast average memory, it takes about half a year of about an hour or two daily to be able to ace SAT physics exam. If you struggle with mathematics, learn […]

Is a Van de Graaff generator dangerous? Preliminary cautions: The Van de Graaff can produce a spark that is simply irritating or quite dangerous. A spark several centimeters long can be the equivalent of 100 000 volts or more. What is the principle of the Van de Graaff generator? The Van De Graaff generator works […]

Is it bad if an extension cord gets hot? “If the cord gets warm or hot to the touch, you may have the wrong size cord or there may be a problem with the wiring in the cord,” Dodson said. “If the cord should handle the load of the item that is plugged in and […]

What are three things that affect longshore currents? When a wave breaks at a more acute (steep) angle on a beach, encounters a steeper beach slope, or is very high, longshore currents increase in velocity. Conversely, a wider breaking angle, gentler beach slope, and lower wave height slows a longshore current’s velocity. What causes long […]

What does left curve mean? The roadway ahead curves to the left. Slow your speed and keep well to the right. The sign may be accompanied by an advisory speed placard, helping you navigate the curve safely. What are the two classification of lines? How many types of lines are there? There are two basic […]

How accurate is a spectrophotometer? The minimum is not sharp and good results can be expected in a transmittance range from 0.2 to 0.6 or an absorbance range from 0.7 to 0.2. An inspection of the graph below indicates that transmittance values of 0.1 and 0.8 are the outside limits between which one can expect […]

Does body temp go up at night? It tends to go up and down a little during the day, and the same is true at night, although while you’re sleeping it can be 1 to 2 degrees lower than in the daytime. Body temperature starts to fall as bedtime approaches, paving the way for a […]

What is Brownian motion explain with diagram? The zigzag movement of the small particles suspended in a liquid or gas is called brownian motion. The best evidence for the existence and movement of particles in liquid was given by ROBERT BROWN. On looking through the microscope, it was found that the pollen grains were moving […]