Category: Physics

What are the three types of switching techniques? There are 3 common switching techniques: Circuit Switching. Packet Switching. Message Switching. What are the four causes of packet delay? In packet switched networks, there are four types of commonly identified delays – processing, queuing, transmission and propagation delays. Processing delay is the CPU cycles needed to […]

How do you pick up a glass of water upside down? Move the glass over the container or sink. Gently place your hand on the paper, then flip the glass over. Remove your hand from the bottom and watch in amazement as the paper stays covering the glass and the water doesn’t spill out. How […]

What does Lenz law state? Lenz’s law, in electromagnetism, statement that an induced electric current flows in a direction such that the current opposes the change that induced it. This law was deduced in 1834 by the Russian physicist Heinrich Friedrich Emil Lenz (1804–65). Lenz’s law. What are the four Maxwell’s equations? The statements of […]

What are 4 reasons cells divide? Terms in this set (4) Food, Waste, and Gas Exchange. They need to maintain a workable ratio of surface area to volume to allow an efficient transfer of materials in and out of the cell. Growth. In order for an organism to grow, they must divide so they can […]

Can we convert mass to energy? First discovered by Einstein more than 100 years ago, it teaches us a number of important things. We can transform mass into pure energy, such as through nuclear fission, nuclear fusion, or matter-antimatter annihilation. Can mass be converted into energy or can mass be destroyed? The total mass of […]

How long do coals burn for? about 1 hour Why do coals burn hotter? Coal and charcoal burn much closer to the source and keep the heat more concentrated leading to a higher temperature. The last thing to happen is combustion of the solid fuel, which is the glowing coals, which gives off the most […]

Why is MMHG used? MmHg means millimetres of mercury (Hg = mercury) and is used in EU member states and Switzerland to measure the pressure of body fluids, such as eg blood pressure. It goes back to a time when pressure was measured by means of a mercury column. How do you convert mm Hg […]

Did California just have a 7.1 earthquake? A magnitude 7.1 earthquake struck southern California on July 5, 2019 at 8:20 p.m. local time (July 6 at 03:20 UTC). This event was centered near the July 4, 2019 magnitude 6.4 earthquake. Map shows past earthquakes and the epicenter of the magnitude 7.1 July 5, 2019 southern […]

When did the Church kill scientists? The Galileo affair (Italian: il processo a Galileo Galilei) began around 1610 and culminated with the trial and condemnation of Galileo Galilei by the Roman Catholic Inquisition in 1633. Did Protestants burn heretics? In 1555 the Protestant bishops Hugh Latimer, Nicholas Ridley, and John Hooper were condemned as heretics […]

What four devices are used in measuring fault movements? Four instruments that are used to monitor faults are creep meters, laser-ranging devices, tiltmeters, and satellites. A creep meter uses a wire stretched across a fault to measure sideways movement of the ground. A laser-ranging device uses a laser beam bounced off a reflector to detect […]