Category: Physics

What is incoming tide called? flood current What is datum on a chart? A chart datum is the water level that depths displayed on a nautical chart are measured from. A chart datum is generally derived from some phase of the tide. Common chart datums are lowest astronomical tide and mean lower low water. What […]

How do I maintain my DANB certification? We encourage you to renew online by logging in to your DANB account. Log in to my DANB account. If you would like to mail or fax your renewal, you may download the form below. The requirement to earn at least 2 CDE credits in infection control and […]

When two current-carrying parallel conductors do they attract? So if you have two current-carrying, parallel wires with magnetic fields circling around them in the same direction, they will attract each other, as shown in the tutorial; at the point at which their respective magnetic fields intersect, they are traveling in opposite directions, and opposites attract. […]

Does a mirror reflect or absorb light? Mirrors do absorb light. The mirror consists of molecules arranged, such that it reflects maximum of the absorbed light Ray,with rear side coated with another surface of material such that it does not allow the partially absorbed light Ray to come out. Does light scatter hit glass? Light […]

Is gravity dependent on mass? Basically, gravity is dependent on mass, where all things – from stars, planets, and galaxies to light and sub-atomic particles – are attracted to one another. Depending on the size, mass and density of the object, the gravitational force it exerts varies. Why is mass not dependent on gravity? It […]

Can my boss send me home without pay? Yes. Your employer can send you home early if there isn’t enough work. If you worked for three hours or more, your employer must pay you for the hours you worked. In some jobs, if you work less than 2 hours, your employer only has to pay […]

Is it cheaper to fill pool with hose? Pool filling costs less than you think with all factors considered. The average homeowner uses about 12,000 gallons of water per month. Using that simple math, it stands to reason that your water bill will at least double when you fill your pool for the first time […]

Can you serve volleyball with a fist? Although you can hit the ball with a closed fist, for overhand serving, the best way to serve is with an open hand. The server should start by holding the ball at shoulder level. The basic overhand serve causes the ball float and gyrate over the net into […]

Is the parent or daughter radioactive? Radioactive Isotopes The radioactive decay of a parent isotope (the original element) leads to the formation of stable daughter product, also known as daughter isotope. As time passes, the number of parent isotopes decreases and the number of daughter isotopes increases (Figure below). Which method is used to date […]

Does compressing a gas heat it up? Compressing air does not necessarily heat it up. For example, if the compression happens very slowly and the container is a good heat conductor, the temperature of the gas remains a constant. However, if the container is perfectly insulated or the process happens very rapidly, the temperature of […]