Category: Physics

How do you know which LED bulb is bad on Christmas lights? Simply bring the light tester close to each bulb. The tester’s indicator will light up when it’s near a functioning bulb. If you have a non-contact voltage detector, bring the detector close to the wire section between each bulb to test for voltage. […]

Do babies need to wear life jackets on boats? Under California law, every child under 13 years of age on a moving recreational vessel of any length must wear a Coast Guard-approved life jacket in serviceable condition and of a type and size appropriate for the conditions and the activity. Does a throwable count as […]

Why water has high boiling point and freezing point? So despite its small molecular weight, water has an incredibly big boiling point. This is because water requires more energy to break its hydrogen bonds before it can then begin to boil. The same concept is applied to freezing point as well, as seen in the […]

What is the biggest star? UY Scuti How is a star born step by step? Stage 1- Stars are born in a region of high density Nebula, and condenses into a huge globule of gas and dust and contracts under its own gravity. This image shows the Orion Nebula or M42 . Stage 2 – […]

How do you solve chain rule problems? Solution: To use the chain rule for this problem, we need to use the fact that the derivative of ln(z) is 1/z. Then, by the chain rule, the derivative of g is g′(x)=ddxln(x2+1)=1×2+1(2x)=2xx2+1. Where do we apply chain rule? The chain rule can be applied to composites of […]

Is the stuff inside glow sticks toxic? The ingredients in glow sticks are generally non-toxic, and most cases will not require medical attention. However, if glow stick fluid is swallowed, it may cause an upset stomach and some mouth irritation. Can Glow sticks make you blind? If glow stick liquid is squirted into the eyes, […]

What is the importance of amendments? It is based on the verb to amend, which means to change for better. Amendments can add, remove, or update parts of these agreements. They are often used when it is better to change the document than to write a new one. What is the purpose of amendments? The […]

How do you calculate energy requirement? To calculate the energy required to raise the temperature of any given substance, here’s what you require: The mass of the material, m. The temperature change that occurs, ΔT. The specific heat capacity of the material, c (which you can look up). Here is a source of values of […]

Why does magnetic force act from a distance? The force exerted by a magnet is called The push or pull of magnetism can act at a distance, which means that the magnet does not have to touch an object to exert a force on it. When you close the refrigerator, you feel the pull before […]

What do you mean by internal forces? Internal forces are forces exchanged by the objects in the system. Internal forces may cause acceleration in different parts of the system but does not cause any acceleration in the center of mass of the entire system. Example: Friction is an external force if the body experiencing friction […]