Category: Physics

Was there life on Mars? To date, no proof of past or present life has been found on Mars. Cumulative evidence suggests that during the ancient Noachian time period, the surface environment of Mars had liquid water and may have been habitable for microorganisms. Has anyone ever died in space? A total of 18 people […]

What is light energy converted into? What is photosynthesis? Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct. How much […]

How long is a full lunar tidal cycle? Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart. It takes six hours and 12.5 minutes for the water at the […]

What is Fourier series Sanfoundry? This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Fourier Series”. 1. Explanation: The Fourier series is the representation of non periodic signals in terms of complex exponentials, or equivalently in terms of sine and cosine waveform leads to Fourier series. Which statement is true […]

What is the number of molecules of water? A mole (mol) is the amount of a substance that contains 6.02 × 10 23 representative particles of that substance. The mole is the SI unit for amount of a substance. Just like the dozen and the gross, it is a name that stands for a number. […]

Is winning a penalty an assist? No assist is awarded for winning a penalty. If a goal is scored after a save, block, or rebound from the goal frame, the first shooter gets an assist. Can you say leave it in football? It’s not to say that you can take advantage of the fact that […]

Why is Ke lost in inelastic collision? An inelastic collision is a collision in which there is a loss of kinetic energy. While momentum of the system is conserved in an inelastic collision, kinetic energy is not. This is because some kinetic energy had been transferred to something else. Such collisions are simply called inelastic […]

Is the contraction of the heart? The cardiac cycle refers to the alternating contraction and relaxation of the myocardium in the walls of the heart chambers, coordinated by the conduction system, during one heartbeat. Systole is the contraction phase of the cardiac cycle, and diastole is the relaxation phase. Which valves are closed in the […]

How does art help child development? Creating art expands a child’s ability to interact with the world around them, and provides a new set of skills for self-expression and communication. Not only does art help to develop the right side of the brain, it also cultivates important skills that benefit a child’s development. What is […]

What is needed for matter to melt? To melt a solid energy is required to overcome the attractions between the particles and allow them to pull them apart. The energy is provided when the solid is heated up. The temperature at which something melts is called its “melting point” or melting temperature. Can both liquid […]