Category: Physics

Is electricity the movement of electrons? Electricity is the movement of electrons between atoms. Why do electrons move from negative to positive? A: Electrons are negatively charged, and so are attracted to the positive end of a battery and repelled by the negative end. So when the battery is hooked up to something that lets […]

What are the mixtures that Cannot be separated? An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements. What jobs use separation techniques? Familiar professions that use separation techniques Chefs – decanting, sieving, filtering. Dentists – safe disposal of mercury fillings (filtering). […]

Is 25 miles per hour wind fast? – at 19 to 24 mph, smaller trees begin to sway. – at 25 to 31 mph, large branches will be in motion, whistling will be heard in overhead wires, and umbrella use becomes difficult if not impossible. – at 32 to 38 mph, whole trees will be […]

Is it illegal for restaurants to not have nutrition facts? If you answered yes, you are legally obligated to provide nutritional information on your menu (including drive thru menus). With the passage of the Affordable Care Act in March 2010, section 4205 included a requirement that establishments with 20 or more locations provide their customers […]

What holds a nucleus together? The strong nuclear force. At extremely short range, it is stronger than electrostatic repulsion, and allows protons to stick together in a nucleus even though their charges repel each other. Remember that the size of the nucleus is really small compared to the size of an atom. What makes a […]

How long can you live after radiation therapy? For most people, the cancer experience doesn’t end on the last day of radiation therapy. Radiation therapy usually does not have an immediate effect, and it could take days, weeks or months to see any change in the cancer. The cancer cells may then keep dying for […]

What vehicles must stop at all railroad crossings NY DMV? Most buses and some trucks must stop at railroad crossings. (See “Railroad Crossing Signals”.) Flashing red lights, lowered crossing gates and/or a bell at a railroad crossing indicate that you must stop, at least 15 feet (5 m) from the tracks. What is the appropriate […]

What do you call the motion of the earth that is responsible for diurnal motion? Diurnal Circle What is the oldest heavenly body that has been observed and has preceded great events in history? Halley’s Comet Which model of the universe is said to be earth centered? Geocentric model, any theory of the structure of […]

How much do amusement park ride operators make? The national average salary for a Ride Operator is $24,649 in United States. How much does a Disney ride operator make? How much does a Ride Operator at Disney Parks make? The typical Disney Parks Ride Operator salary is $12. Ride Operator salaries at Disney Parks can […]

How many times do pulsars spin? The fastest known millisecond pulsars can rotate more than 700 times per second. How do pulsars die? Since the light energy escapes, the production of the energy beam robs energy from the pulsar, so the pulsar’s rotation slows down (angular momentum does slowly decrease). Eventually, the pulsar dies away […]