Category: Physics

How do skaters not get dizzy? When our head rotation triggers this automatic, repetitive eye movement, called nystagmus, we get dizzy. Skaters suppress the dizziness by learning how to counteract nystagmus with another type of eye movement, called optokinetic nystagmus. Why is backflip banned in skating? Even though the move that caused the leak was […]

How long can blood sit out after being spun? Whole blood samples should not remain at room temperature longer than 8 hours. If assays are not completed within 8 hours, samples should be stored at +2°C to +8°C no longer than 7 days. If assays are not completed within 7 days, or the sample is […]

What are the signs of a timing belt going bad? Symptoms Of A Failing Or Broken Timing Belt You Hear Odd Noises Coming From The Engine. Your Check Engine Light Is On And Flashing. Your Car Starts Hard And Occasionally Misfires. You Notice A Loss Of Power And Your Car Runs Or Idles More Roughly […]

What does 8 mean in the periodic table? Oxygen What are the 30 elements and their symbols? The first 30 elements of the periodic table and their symbols A B Helium He Lithium Li Beryllium Be Boron B What is the 30 elements? The Elements, sorted by Atomic Number Atomic Number Symbol Name 30 Zn […]

What happens if we drink expired beer? Expired alcohol doesn’t make you sick. If you drink liquor after it’s been open for more than a year, you generally only risk a duller taste. Flat beer typically tastes off and may upset your stomach, whereas spoiled wine usually tastes vinegary or nutty but isn’t harmful. Can […]

What is the goal of a psychologist? In the broadest of terms, a psychologist’s goal is to study and treat people who have mental illnesses or emotional difficulties, or to provide research on human behavior and how people think. There are three main types of psychologists – research, counseling and applied – and many specializations. […]

When can the addition of two vectors be zero? Yes, two vectors of equal magnitude that are pointing in opposite directions will sum to zero. Two vectors of unequal magnitude can never sum to zero. If they point along the same line, since their magnitudes are different, the sum will not be zero. What does […]

What is the density of Earth in kg m3? 5515 kg.m−3 What is the density of steel and concrete? Steel is about 3.25 times as dense as plain concrete, so if 1% by volume is rebar replacing concrete density increases 2.25%. What is the density of black sand? around 5g/cm3 What is the density of […]

What is the medical term for the graphic record of the electrical impulses of the heart? ECG/EKG. The graphic record of the electrical current as it progresses through the heart. How is bipolar recording done? Bipolar electrodes are fabricated by hot-pressing the graphite felt sheets onto both sides of the conducting plastic substrates so that […]

What is the importance of standard units? We need standard unit for measurement to make our judgement more reliable and accurate. For proper dealing, measurement should be same for everybody. Thus there should be uniformity in measurement. For the sake of uniformity we need a common set of units of measurement, which are called standard […]