Category: Physics

What is the relationship between refractive index and wavelength? v = f. Combining the above expression for velocity with the definition of index of refraction, we find a relationship between the wavelength = v/f in a medium and the wavelength 0 = c/f in vacuum: In the above equation, the frequencies cancel because frequency does […]

What do plant cells have that animals cells do not? Animal cells have centrosomes (or a pair of centrioles), and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not. How a cell is like a […]

What are 4 examples of potential energy? Examples of Gravitational Potential Energy A raised weight. Water that is behind a dam. A car that is parked at the top of a hill. A yoyo before it is released. River water at the top of a waterfall. A book on a table before it falls. A […]

Are aluminum bats allowed in Major League Baseball? Aluminum bats are used in college, high school and little league ball, but they’re illegal in the major leagues where hitters must use wooden bats. The issue is the velocity with which balls come off the bat, otherwise known as bat-exit speed. Where do you bat your […]

Do inertial frames exist? Such a frame is called an inertial frame. If one such inertial frame exists, then an infinite number of other inertial frames exist since any frame that is moving at a constant relative velocity to the first inertial frame is also an inertial frame. They are called non-inertial frames. Is Earth […]

Is 100 degrees Celsius hot? No. We can say that the temperature of boiling water is 100°C(or 100 K) more than the temperature of ice cold water. The highest temperature obtained in the large hadron collider is 5.5 trillion degrees Celsius while the temperature on the surface of sun is 5600°C. However, sun has much […]

Where should however go in a sentence? Use a semi-colon (;) before and a comma (,) after however when you are using it to write a compound sentence. If ‘however’ is used to begin a sentence, it must be followed by a comma, and what appears after the comma must be a complete sentence. What […]

Is 11.9 volts enough to start a car? A flat battery can show 12 volts , but not be good enough to start a car . 11.9v indicates the battery is completely discharged. Anything under 12.2v means the battery is in a state of discharge, and a healthy battery should show 12.6v in a static […]

What is the difference between fission and fusion answers? Fusion takes place when two low-mass isotopes, typically isotopes of hydrogen, unite under conditions of extreme pressure and temperature. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts […]

What is the difference between successful people and normal people? Ordinary people set goals, successful people set detailed plans of actions. Successful people set their goals as well. More importantly, however, they create a detailed set of actions they need to perform in order to achieve their end goal. What is the difference between ordinary […]