What is the Doppler effect and why is it important? The Doppler effect is important in astronomy because it enables the velocity of light-emitting objects in space, such as stars or galaxies, to be worked out. What are two everyday applications of the Doppler effect? The Doppler effect has several real-world applications. For example, besides […]
Why does the mass change?
Why does the mass change? The mass of an object does not change with speed; it changes only if we cut off or add a piece to the object. Since mass doesn’t change, when the kinetic energy of an object changes, its speed must be changing. Special Relativity (one of Einstein’s 1905 theories) deals with […]
Is gravitational force equal to weight?
Is gravitational force equal to weight? The gravitational force on Earth is equal to the force the Earth exerts on you. At rest, on or near the surface of the Earth, the gravitational force equals your weight. What two factors does gravitational force depend on? When dealing with the force of gravity between two objects, […]
What is the purpose of Find and Replace dialog box?
How do I know if my steering rack is part of routine maintenance?
How do I know if my steering rack is part of routine maintenance? Checking the steering box A typical steering-box layout. Check the gasket and seals for leaks, and the moving parts for wear. Measure steering-wheel travel by making a chalk mark on the rim and using your finger as a reference point. Try to […]
Can sound waves bend?
Can sound waves bend? Sound waves do, indeed, bend. In an underwater thermal gradient the sonar waves can bend enough to create blind spots, so that you can not “see” a target that would ordinarily be well within sonar range. The other example is the difference in how well sound carries up/down wind. What is […]
What is the two main function of a diode?
What is the two main function of a diode? Main functions The most common function of a diode is to allow an electric current to pass in one direction (called the diode’s forward direction), while blocking it in the opposite direction (the reverse direction). As such, the diode can be viewed as an electronic version […]
What caused the Izmir earthquake 2020?
What caused the Izmir earthquake 2020? The magnitude 7.0 tremor occurred in an area of complex geological movement, where multiple tectonic plates crack the surface as they jostle for position. Rescue workers and locals search for residents trapped in the debris of a collapsed building in Izmir, Turkey, on October 30, 2020. Why did the […]
What is the Y intercept when given two points?
What is the Y intercept when given two points? Steps Calculate the slope from 2 points. For Example, Two points are (3, 5) and (6, 11) Substitute the slope(m) in the slope-intercept form of the equation. Substitute either point into the equation. You can use either (3,5) or(6,11). Solve for b, which is the y-intercept […]
What are emission spectrums used for?
What are emission spectrums used for? A spectroscope can be used to determine which frequencies have been emitted by a substance. The emission spectrum is a combination of the atomic spectra of the various kinds of atoms making up the substance and can be analyzed to determine the substance’s chemical or atomic composition. What do […]