Category: Physics

How much does it cost to run a 60w bulb for 24 hours? Let’s say you have a 60-watt incandescent lightbulb and you are paying 12 cents per kWh of energy. Leaving the bulb on the whole day will therefore cost you: 0.06 (60 watts / 1000) kilowatts x 24 hours x 12 cents = […]

Can we make oxygen out of co2? The team found that if you shoot carbon dioxide at an inert surface like gold foil, the molecule can be split to form molecular oxygen and atomic carbon. That in turn could create molecular oxygen, and served as the inspiration for the Caltech reactor. How much oxygen is […]

How much weight will I lose if I eat 800 calories a day? According to founder Dr Michael Mosley, those who closely follow the Fast 800 plan could see themselves lose up to 11lb in two weeks by limiting their daily intake to 800 calories a day. It’s been praised, alongside the 16:8 diet, as […]

What does a negative angular acceleration indicate to you? Negative angular velocity(ω) means that the particle is revolving anticlockwise. Thus, negative angular acceleration(α) is a “push” in the anticlockwise direction. If α and ω have the same sign, the body will speed up, else slow down (and eventually go in reverse). Is clockwise positive or […]

How much forest is cut down for agriculture? Rainforests across the world are in great danger. Food and Agriculture Organization’s 2016 State of the Forests report revealed that 7 million hectares of forest are lost annually while agricultural land expands by 6 million. Does agriculture affect rainforest? Agricultural use of some rainforest land proves to […]

Does higher entropy mean more stable? A system which is more disordered in space will tend to have more disorder in the way the energy is arranged as well. The entropy has increased in terms of the more random distribution of the energy. In essence . . . “a system becomes more stable when its […]

What is the formula for calculating efficiency? The formula to calculate work efficiency is the ratio of output to input expressed as a percentage. The work efficiency formula is efficiency = output / input, and you can multiply the result by 100 to get work efficiency as a percentage. How do you calculate the maximum […]

What are the major organs and functions of the nervous system? The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control of the body and communication among its parts. What is […]

Which unit is used for density? grams per cubic centimeter What is the meaning of volume? (Entry 1 of 3) 1 : the degree of loudness or the intensity of a sound also : loudness. 2 : the amount of space occupied by a three-dimensional object as measured in cubic units (such as quarts or […]

What is diode resistant? Hence, diode resistance can be defined as the effective opposition offered by the diode to the flow of current through it. Ideally speaking, a diode is expected to offer zero resistance when forward biased and infinite resistance when reverse biased. What is the reverse resistance of a diode? Reverse resistance is […]