What is the volume of a mineral sample? Handle your samples to get an idea of how dense each one is, or how heavy each mineral feels for its size. The mass of each sample is measured using a balance or electronic scale. The volume of each sample can be measured (in milliliters) by the […]
How much does it cost to run 100w light bulb?
How much does it cost to run 100w light bulb? A kilowatt-hour is 1,000 watts used for one hour. As an example, a 100-watt light bulb operating for ten hours would use one kilowatt-hour….What Uses Watts in Your Home. Appliance/Equipment 100-Watt Bulb (100 W) Equivalent compact fluorescent Avg. Usage 4 hours/day 4 hours/day Monthly kWh […]
Does car battery charge while in park?
Does car battery charge while in park? Yes, the alternator does charge the battery while the car is idling – regardless of the load on the battery. However, if your electrical use load (radio, lights, fan, etc) exceeds the amount of charge the battery is receiving from the alternator, you will end up with a […]
Is Zenith the North Star?
Is Zenith the North Star? Sign up for our free daily newsletter today! We in the Northern Hemisphere are particularly lucky to have Polaris, a moderately-bright star, closely marking the north celestial pole – the point in the starry sky that’s at zenith (directly overhead) at the Earth’s North Pole. What are the 3 celestial […]
Is Bacteria living or nonliving?
Is Bacteria living or nonliving? Bacteria (singular: bacterium) are a major group of living organisms. Most are microscopic and unicellular, with a relatively simple cell structure lacking a cell nucleus, and organelles such as mitochondria and chloroplasts. Bacteria are the most abundant of all organisms. Do antibiotics weaken immune system? Will antibiotics weaken my immune […]
What is wrong with carbon dating?
What is wrong with carbon dating? The group theorizes that large errors in carbon dating result from fluctuations in the amount of carbon 14 in the air. Carbon dating is unreliable for objects older than about 30,000 years, but uranium-thorium dating may be possible for objects up to half a million years old, Dr. Zindler […]
Why is Al3+ smaller than Na+?
Why is Al3+ smaller than Na+? Al3+ because they all have the same number of electrons, however Al3+ has the most protons and therefore greatest nuclear charge. In Al3+, the same number of electrons are being attracted by more protons in the nucleus, so the electrons are being pulled closer to the nucleus, reducing the […]
Do scientists speculate?
Do scientists speculate? Speculation is so easy and tempting in settings where it leads more to errors than to accurate information, that most often speculation in science is discouraged. But there is still a limited, useful, role for speculation in science. What does Aristotle say about science? The third and final division of science for […]
Is 300 watts enough for a subwoofer?
What is broaching in machining?
What is broaching in machining? Broaching is a machining process using a cutting tool with teeth that increase in size from front to back. In many cases, an entire surface (or multiple surfaces) can be finished in a single pass with broaching. The technique is most often applied to finish holes, splines and flat surfaces. […]