Is current Lorentz invariant? In particular, the charge carried by a particle does not vary with the particle’s velocity. is called the proper density, and is obviously Lorentz invariant. is the current density 3-vector. Clearly, charge density and current density transform as the time-like and space-like components of the same 4-vector. What is the difference […]
What force keeps the planets in their continuous orbits around the sun?
What force keeps the planets in their continuous orbits around the sun? Gravitational attraction provides the centripetal force needed to keep planets in orbit around the Sun and all types of satellite in orbit around the Earth. The Earth’s gravity keeps the Moon orbiting us. It keeps changing the direction of the Moon’s velocity. What […]
Which liquid marble flows the fastest slowest?
Which liquid marble flows the fastest slowest? We expect that the marble will travel the slowest through honey, the fastest through water, and the time for oil will be somewhere in between. Drop a marble into each jar one at a time, starting with honey, then water, and lastly the oil. Why is glass called […]
Why Oxygen is a diatomic element?
Does Acid Precipitation cause rocks to weather faster?
Does Acid Precipitation cause rocks to weather faster? Acid rain slowly dissolves rocks due to chemical reactions between the acid and the minerals in the rock. Differential Weathering: Softer, less resistant rocks wear away at a faster rate than more weather resistant rocks. More exposure to acid rain results in more rapid weathering. Why does […]
What will happen to the Great Rift Valley in Africa eventually?
What will happen to the Great Rift Valley in Africa eventually? Eventually, it will rupture, leading to the formation of a rift valley. This process is accompanied by surface manifestations along the rift valley in the form of volcanism and seismic activity. Rifts are the initial stage of a continental break-up and, if successful, can […]
Which is an example of abiotic factor?
Which is an example of abiotic factor? An abiotic factor is a non-living part of an ecosystem that shapes its environment. In a terrestrial ecosystem, examples might include temperature, light, and water. In a marine ecosystem, abiotic factors would include salinity and ocean currents. Abiotic and biotic factors work together to create a unique ecosystem. […]
Is AP Physics 1 or 2 harder?
Is AP Physics 1 or 2 harder? Going forward with this understanding, it stands to reason that most students taking both courses will find AP Physics 2 to be more difficult that AP Physics 1. The topics are generally more abstract and some of the most difficult topics to grasp are contained within Physics 2. […]
How did Egypt overthrow Mubarak?
How did Egypt overthrow Mubarak? Mubarak was ousted after 18 days of demonstrations during the 2011 Egyptian revolution when, on 11 February, Vice President Omar Suleiman announced that Mubarak had resigned as president and transferred authority to the Supreme Council of the Armed Forces. How long did Egypt revolution last? Timeline of the Egyptian revolution […]
What reinforcement schedule is most effective?
What reinforcement schedule is most effective? variable ratio What is an example of fixed ratio? Fixed-ratio schedules are those in which a response is reinforced only after a specified number of responses. An example of a fixed-ratio schedule would be delivering a food pellet to a rat after it presses a bar five times. What […]