Category: Physics

What is energy type signal? A signal can be categorized into energy signal or power signal: An energy signal has a finite energy, 0 < E < ∞. In other words, energy signals have values only in the limited time duration. For example, a signal having only one square pulse is energy signal. For example, […]

How many Earth years is a Lightyear? A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it! What is the oldest planet in the universe? At 12.7 billion years old, planet Psr B1620-26 B is […]

Why is derating necessary? Derating increases the margin of safety between part design limits and applied stresses, thereby providing extra protection for the part. By applying derating in an electrical or electronic component, its degradation rate is reduced. The reliability and life expectancy are improved. How do you calculate derating current? Selection of cable – […]

What is used to measure plate movement? – How do scientists measure the distance that plates move? – Scientists use GPS satellites and laser technology to measure the plates movements down to the centimeter. – Laser pulses are shot from the ground to a satellite to determine the exact location of the plates. What techniques […]

What is the formula for change in internal energy? The first law of thermodynamics states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system. In equation form, the first law of thermodynamics is ΔU = Q − W. Here […]

How do you balance a pendulum clock? Give the pendulum a slight sideways push to start it swinging. Listen to the tick –tock. The tick and the tock should sound evenly spaced, if so the clock is said to be “in beat” or balanced. If not, the crutch at the back of the movement will […]

What are the bottom two rows of periodic table? The two rows of 14 elements at the bottom of the periodic table are the lanthanides and the actinides, whose positions in the periodic table are indicated in group 3. Who has most rare earth minerals? China How many rare earths are there? 17 elements What […]

Who drives the ship? A helmsman or helm is a person who steers a ship, sailboat, submarine, other type of maritime vessel, or spacecraft. Can a ship captain really marry you? A ship’s captain generally does NOT have the legal right to officiate a wedding at sea. In order for a Captain of a ship […]

What is the load per unit area? The stress that the 10,500 pound load applies to the shaft is defined as the load divided by the cross-sectional area of the shaft, which is 10,500 pounds ÷ 0 What is the meaning of per unit? Per unit is a way of expressing the value of a […]

What used cars get 40 mpg? 7 Great Used Cars That Get 40 MPG 2010-2015 Toyota Prius. 2013-2019 Ford Fusion Hybrid. 2016-2019 Honda Civic. 2012-2017 Toyota Camry Hybrid. 2014-2015 Chevrolet Cruze Diesel. 2014-2017 Ford Fiesta SFE. 2014-2017 Honda Accord Hybrid. What is the rarest car to have? 24 Rarest Cars In The World And How […]