Category: Physics

Is honors physics hard in high school? If you have had calculus, then honors physics is the class for you. And it’s actually easier than the strictly algebra physics. The reason is: there are far fewer equations to learn and physical relationships are easier to see and understand when described by calculus. Is Physics 1 […]

What types of companies use perpetual inventory system? Businesses with high sales volume and multiple retail outlets (like grocery stores or pharmacies) need perpetual inventory systems. The technological aspect of the perpetual inventory system has many advantages such as the ability to more easily identify inventory-related errors. Why do companies use perpetual inventory system? Why […]

What is bad about hydrogen fuel cells? Fuel cells wear out crazy fast and are hard to regenerate. Hydrogen as a fuel is incredibly hard to make and distribute with acceptably low losses. Are hydrogen fuel cells better than batteries? Put simply, batteries are far more efficient than fuel cells, according to VW. The process […]

Why does the sun look so small but it is really large? However, compared to other stars, our Sun is only a medium-sized star, meaning that some stars are much larger than the Sun and some are much smaller. The Sun looks bigger than other stars because it is so much closer to the Earth. […]

What type of signal is 0 20mA? The 0-20mA current input SCM measures current from a regulated source. This SCM could be used for any device that provides a current source as a means of conveying a signal level. A common application is to connect a sensor that outputs 4-20mA with respect to its entire […]

How do you get latent heat? Latent heat calculation The specific latent heat is different for solid to liquid transition and liquid to gas transition. For example, if we want to turn 20 g of ice into water we need Q = 20 g * 334 kJ/kg = 6680 J of energy. To turn the […]

What is the unit of G Class 9? In SI units, G has the value 6.67 × 10-11 Newtons kg-2 m2. The direction of the force is in a straight line between the two bodies and is attractive. Thus, an apple falls from a tree because it feels the gravitational force of the Earth and […]

Do waves crash in the middle of the ocean? Breaking of water surface waves may occur anywhere that the amplitude is sufficient, including in mid-ocean. However, it is particularly common on beaches because wave heights are amplified in the region of shallower water (because the group velocity is lower there). What causes waves to break […]

How do you prevent cancer if it runs in the family? Talk to your doctor about what tests you need and when you should begin getting them. Everybody – no matter their family history – can help lower their risk by avoiding tobacco; staying at a healthy weight; eating a diet rich in fruits, vegetables, […]

Is it unhealthy to freeze water bottles? The truth. Drinking water from plastic water bottles that freeze or overheat does not increase your risk of cancer. But there is no evidence that plastic water bottles contain dioxins. Some plastics contain substances known as plasticizers, such as DEHA, to make the plastic more flexible and less […]