Category: Physics

What is the first law of quantum mechanics? The theory allows particles to be created and destroyed and requires only the presence of suitable interactions carrying sufficient energy. Quantum field theory also stipulates that the interactions can extend over a distance only if there is a particle, or field quantum, to carry the force. What […]

What was the source of power in the Middle Ages? Even as agriculture emerged, followed by towns and cities, human muscles — and those of domesticated animals — were still the main source of power. How has energy consumption changed over the past 50 years? Over the last 50 years, while energy consumption grew substantially, […]

How is home kWh calculated? Calculating household usage To find the kilowatts used by an appliance, you simply divide the watts listed on the appliance by 1,000 (the number of watts in a kilowatt) and then multiply by the hours used. For example:You used a 400 watt radio for one hour today. What uses most […]

Is it dark during solar eclipse? In a solar eclipse, the Moon moves between the Earth and the Sun. When this happens, part of the Sun’s light is blocked. The sky slowly gets dark as the Moon moves in front of the Sun. What is the longest solar eclipse ever? The longest possible duration of […]

Which are the potential sources of error in the experiment? Common sources of error include instrumental, environmental, procedural, and human. All of these errors can be either random or systematic depending on how they affect the results. Instrumental error happens when the instruments being used are inaccurate, such as a balance that does not work […]

What shock feels like? The symptoms of shock include cold and sweaty skin that may be pale or gray, weak but rapid pulse, irritability, thirst, irregular breathing, dizziness, profuse sweating, fatigue, dilated pupils, lackluster eyes, anxiety, confusion, nausea, and reduced urine flow. How do hospitals treat shock? Lay the Person Down, if Possible. Elevate the […]

Why do black bodies radiate? A black body is an idealized object that absorbs all electromagnetic radiation it comes in contact with. It then emits thermal radiation in a continuous spectrum according to its temperature. Much cooler objects like planets and humans emit the most radiation in the infrared. Can radiation travel through a vacuum? […]

Why does my bowling ball feel so heavy? The reason for this is because you have to squeeze to hold on to a house ball. The lighter weight helps you hold on. When the ball is fit to you, you don’t have to exert nearly as much muscle to keep from dropping it. It isn’t […]

What are the high points and low points of a transverse wave called? A high point on a transverse wave is called a crest, and a low point is called a trough. Light waves and radio waves are examples of transverse waves. Longitudinal waves – If you push or pull one end of a slinky, […]

Why is Blast faster than Fasta? This step is one of the main differences between BLAST and FASTA. FASTA cares about all of the common words in the database and query sequences that are listed in step 2; however, BLAST only cares about the high-scoring words. This allows the program to rapidly compare the high-scoring […]