Category: Physics

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 […]

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. […]

How do I calculate power? Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in […]

At what angle two forces p Q and PQ Act so that resultant is √ 2p 2 Q 2? Thus, the angle of inclination between the forces must be 60°. At what angle should the two vectors 2f and act so that the resultant force is? Answer: Let a and b are two vectors making […]

Is wanted formal know? People sometimes ask a question, then say, “Just wanted to ask” to indicate that they were only asking out of curiosity. At other times someone might preface a question with “I just wanted to ask, but…”, as a way of introducing the question. “May I know” is not idiomatic. It is […]

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 […]

In which house is Venus placed in your birth chart? Venus in the 11th House. What are Venus in Cancer attracted to? What Attracts Venus In Cancer Men? Venus in Cancer men are often attracted to a classic feminine ideal. They want someone who is sentimental, gentle, kind, and affectionate—those who have an air of […]

What three things are required for photosynthesis? To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant’s leaves, flowers, branches, stems, and roots. Plants also require water to make their food. Is it OK for plant roots to be exposed? If the […]

What is energy diagram? An energy diagram can be defined as a diagram showing the relative potential energies of reactants, transition states, and products as a reaction progresses with time. The activation energy is the difference in the energy between the transition state and the reactants. It’s depicted with a red arrow. What is energy […]