Category: Physics

What is the best definition of reflection? 1 : an instance of reflecting especially : the return of light or sound waves from a surface. 2 : the production of an image by or as if by a mirror. 3a : the action of bending or folding back. b : a reflected part : fold. […]

Why is it illegal to take pebbles from the beach? You can not legally take sand from the beach as you would be contributing (even if only in a small way) towards the weakening of the defensive barrier the beach provides from the sea to the land. Sand is off-limits though. Why are the beaches […]

Is it OK to be single forever? Yes, it is completely fine to be single forever. As much as everyone wants their lives to have a “Happily ever after”, it generally doesn’t happen. A large amount of people in the world remain single forever, yet they can be some of the happiest people alive. Why […]

What type of light is needed to cause the photoelectric effect? ultraviolet light What is the smallest quantum of light called? photons Why is the mass of a photon zero? But according to special relativity, light ALWAYS travels with the light speed c, and is NEVER at rest. And so it has zero REST mass. […]

Is the phase in which unemployment begins to decrease demand for goods and services increases and GDP begins to rise again? POB – Lesson 1 and 2 Review A B Recovery The phase in which unemployment decreases, demand for goods and services increases, and GDP begins to rise. Inflation: An increase in the general price […]

How do you tell which way the wind is blowing? A weather vane is designed to point directly into the wind. One side of the weather vane will be a narrow, pointed end (usually resembling the tip of an arrow). The other end is made wider to catch the wind. As the wind blows, you […]

What are five communicative styles? From the world of psychology we now know that there are five different styles of communication that individuals can choose to adopt: assertive, aggressive, passive aggressive, manipulative and submissive (Bourne, 1995). What are the 5 communicative styles? The 5 styles of communication have been categorized into assertive, aggressive, passive-aggressive, submissive […]

How many grammes makes 1kg? 1,000 grams How much is half 1kg? Half of one kilogram= 1000/2 = 500 grams. Hence if you take a half of this then it will be 1000÷2= 500gm. 500 grams in half a kilogram. 1 kilogram=1000 grams. What is half of 1kg? 500g How many cups is half kilo? […]

How Global Weather is monitored? Scientists, volunteer observers, and automated instruments from around the world measure climate variables at Earth’s surface and above. Some of the data collected include air chemistry, temperature, precipitation, cloud cover, and wind speed. Who uses weather maps? It can show temperature, cloud coverage, rain or snow, wind, air pressure, humidity, […]

How do you find the missing resistance? If you know the circuit’s total current and voltage, you can use Ohm’s Law R = V/I to find the total resistance, then the formula for resistors in parallel to solve for the missing resistor value. What happens when resistors are connected in parallel? When resistors are connected […]