Category: Physics

Which functions are continuous and differentiable everywhere? In mathematics, the Weierstrass function is an example of a real-valued function that is continuous everywhere but differentiable nowhere. It is an example of a fractal curve. Is every continuous function is integrable? What we get from this is that every continuous function on a closed interval is […]

How do I know if my tub is cast iron? If you can see the tub from underneath and it looks black it is probably cast iron. If it is more like bright metal it is steel. If you want, remove the overflow cover and popup lever from the head end of the tub and […]

What does the body use first for energy? Carbohydrates are used for energy (glucose). Fats are used for energy after they are broken into fatty acids. Protein can also be used for energy, but the first job is to help with making hormones, muscle, and other proteins. Broken down into glucose, used to supply energy […]

How do RBC survive without nucleus? The red blood cells without nuclei, called reticulocytes, subsequently lose all other cellular organelles such as their mitochondria, Golgi apparatus and endoplasmic reticulum. The spleen acts as a reservoir of red blood cells, but this effect is somewhat limited in humans. Is RBC a living cell? rbcs are living […]

Why are distractions bad? If you switch back and forth between tasks often enough, you could feel disoriented, or even exhausted. In addition, your brain will produce more cortisol, a stress hormone that often leads to irritability, aggression and impulsive behavior. How can you limit internal distractions? 10 Smart Tips to Prevent Distractions and Sharpen […]

What is an inertial frame of reference in physics? Within the realm of Newtonian mechanics, an inertial frame of reference, or inertial reference frame, is one in which Newton’s first law of motion is valid. An inertial frame of reference is one in which the motion of a particle not subject to forces is in […]

How do you remove a stuck metal lid? Warm water Alternatively, you could fill a bowl with hot water and place the jar upside down in the water, leaving it there for around 30 seconds. The hot water will help expand the metal lid (more so than the glass), making it easier to remove. Does […]

What is SI unit of sound? The SI unit of sound pressure is pascal (Pa). Decibel (dB) is a relative unit of measurement widely used in acoustics. However, the dB is not a unit in the sense that a metre is a unit of length. The decibel is a logarithmic unit used to describe a […]

What happens to the particles when a liquid boils? Boiling. If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. As the liquid gets warmer more particles have sufficient energy to escape from the liquid. Eventually even particles in the middle of the liquid form bubbles […]

Which cells in your body undergoes cellular respiration? All living cells must carry out cellular respiration. It can be aerobic respiration in the presence of oxygen or anaerobic respiration. Prokaryotic cells carry out cellular respiration within the cytoplasm or on the inner surfaces of the cells. What are the similarities between photosynthesis and aerobic respiration? […]