Category: Physics

Why do convection currents occur? Convection currents form because a heated fluid expands, becoming less dense. The less-dense heated fluid rises away from the heat source. As it rises, it pulls cooler fluid down to replace it. This fluid in turn is heated, rises and pulls down more cool fluid. What happens when convection currents […]

What is good for radiation? Eat a variety of protein-rich foods that are low in fat. Include seafood, lean meat and poultry, Greek yogurts, eggs, beans, soy products, and unsalted nuts and seeds. Some soy products are highly processed and not as good for you as other types of soy. Does radiation treatment lower immunity? […]

When was electricity first used in homes in India? The first demonstration of electric light in India was conducted in Kolkata (then Calcutta) mid-1879 during British colonization of the sub-continent. Which city in India got the first electricity? Bengaluru Which state is called powerhouse of India? Jharsuguda Jharsuguda Powerhouse of Odisha Country India State Odisha […]

How can I add nitrogen to my soil fast? Some organic methods of adding nitrogen to the soil include: Adding composted manure to the soil. Planting a green manure crop, such as borage. Planting nitrogen fixing plants like peas or beans. Adding coffee grounds to the soil. What plant food is high in nitrogen? Comfrey, […]

Can an experiment have two dependent variables? It is possible to have experiments in which you have multiple variables. There may be more than one dependent variable and/or independent variable. This is especially true if you are conducting an experiment with multiple stages or sets of procedures. Is it OK to have multiple dependent variables? […]

Is spray in foam insulation worth it? Spray foam insulation is a great product. Homes insulated with it can be some of the most efficient and comfortable homes built. I’ve been in plenty of these homes and can tell you that when spray foam is installed properly, they outperform 99% of fiberglass batt-insulated, stick-built homes. […]

What kind of current is used in homes? AC – Alternating Current How many amps is a normal house outlet? 15 How many 12v batteries are needed to power a house? Number of Batteries A battery bank designed to power an average American household for three days would need to supply 90 kilowatt-hours of energy. […]

What is KCL formula? According to Kirchoff’s Current Law (KCL), the sum of all currents entering a node equals to the sum of all currents leaving it. The current IR1 in this simulation divides into two – IR2 and IR3 – and is, thus, equal to their sum: IR1 – IR2 – IR3 = 0. […]

What is the character of a typical stellar spectra? Standard Stellar Types (O, B, A, F, G, K, and M) Type Color Main Characteristics G White to Yellow Solar-type spectra. Absorption lines of neutral metallic atoms and ions (e.g. once-ionized calcium) grow in strength. K Orange to Red Metallic lines dominate. Weak blue continuum. M […]

What is the use of standard time? Standard Time, the time of a region or country that is established by law or general usage as civil time. The concept was adopted in the late 19th century in an attempt to end the confusion that was caused by each community’s use of its own solar time. […]