Category: Physics

Which is the best example of a scientific discovery? Among the statements that were given, the best example of a scientific discovery resulting from a new technology is “the discovery of the structure of DNA, which occurred as the result of an X-ray image of a DNA molecule”. How is science and technology important to […]

Is confusion a sign of anxiety? Difficulty concentrating can be one sign of an anxiety disorder, and it is a reported symptom in the majority of people diagnosed with generalized anxiety disorder. Can stress make you confused? Stress, anxiety or depression can cause forgetfulness, confusion, difficulty concentrating and other problems that disrupt daily activities. How […]

What is H in E HF? The energy of each photon is E = hf, where h is Planck’s constant and f is the frequency of the EM radiation. Higher intensity means more photons per unit area. What does the H stand for in Planck’s equation? Planck’s constant, symbolized h, relates the energy in one […]

What makes it look like stars are moving? There are actually two different reasons why stars appear to move across our sky. The first is because the Earth is spinning and second because the Earth itself is moving around the Sun. At the same time as the Earth is moving around the sun it is […]

What is it called when a straw bends in water? This bending of light, called refraction, causes the straw to look broken​1​. The portion of the straw that is submerged in water also appears to be wider than the portion of the straw above the water. Why does a spoon look broken in the water? […]

What does IDK mean from a girl? I don’t know What LDK means? What to say if a girl says I don’t know you? You may say, I am so and so and I saw you in _______place and wanted to be friends with you. Please have a coffee with me and at the end […]

What is an exposure index? The exposure index is currently a method by which digital radiography manufacturers provide feedback to the technologist regarding the estimated exposure on the detector, as a surrogate for image signal-to-noise ratio and an indirect indication of digital image quality. What are the different exposure indicators? The exposure indicator has as […]

When a charged particle enters a uniform magnetic field what is its speed? As it enters the uniform magnetic field within the solenoid, its speed is 800 m/s and its velocity vector makes an angle of 30° with the central axis of the solenoid. What is the change in kinetic energy of the particle entering […]

Why do stars differ in brightness? A star’s brightness also depends on its proximity to us. The more distant an object is, the dimmer it appears. Therefore, if two stars have the same level of brightness, but one is farther away, the closer star will appear brighter than the more distant star – even though […]

Why are acoustic strings thicker? Acoustic guitarists generally favour thicker strings as they provide more volume, warmth and resonance – key requirements for an acoustic instrument. It’s also less popular to bend strings, therefore sacrifice flexibility for tension. What gauge strings did Jimi Hendrix use? “We were using the normal one, not the very high […]