It is a hot summer day priyanshi and ali are wearing

Should you wear white or black during the summer? Or that other burning fashion question: Is it OK to wear white after Labor Day? Oh wait, that question really isn't important. Let's get back to the summer question. There are two answers to the black vs. white clothing question. 1. Wear White. A white object is white because it reflects white light, and white light is a combination of all the visible colors. This means that a white shirt (or pants) will reflect most of the light and not get hot. Simple, right? OK. Let's be clear. This black vs. white clothing isn't exactly a settled issue. People actually study this stuff—here is an article from Nature published in 1980: "Why do Bedouins wear black robes in hot deserts?". There are clearly several situations to consider with the Bedouin clothing. But what about more common outfits, like a T-shirt? Should you wear a black or white T-shirt on a warm summer day? Rhett Allain From this image I can get the temperature of the shirts. OK, technically there is a small problem measuring the temperature, but I will address that shortly. The black T-shirt on the right measured 131.0 Fahrenheit and the white one on the left was 111.8. Yes, it's clear the black shirt was hotter. Other than that, there were no real surprises. But come on. You already knew this. In fact, you can even do your own experiment. Grab some paper—a white piece and a black piece. Place them outside in the same sunlight. You only have to wait a few minutes before...

Nylon As a fully synthetic material, nylon is the opposite of breathable. Because it’s designed to repel water and has a low level of absorption, clothing made from nylon tends to trap heat and sweat against the skin. Acrylic Much like nylon, acrylic is not a natural fabric. While it often shows up in summer dresses and tops, the material can often be hot and abrasive, making it one of the worst summer fabrics. Polyester Another summer fabric that’s best avoided is Vinyl The slick wet look of vinyl has its place and time, but with a synthetic profile that’s also waterproof and ideal for upholstery, it’s not exactly a great choice for summer clothing. To get your vinyl fix, opt for vinyl shoes and accessories. Fleece It may come as little surprise that a material made to keep the body warm is a poor choice among summer fabrics. While certain variations of wool are okay (articles specifically labeled “summer wool” are a good start), fleece is actually derived from polyester, so it comes with the same issues of trapping moisture and reducing natural ventilation. Next: This story was published at an earlier date and has been recently updated .

Exemplar Problems and Solutions for Class 9 This article contains the set of problems and solutins fromNCERT Exemplar for class 9. Science from Multiple Choice Questions fromNCERT Exemplar for class 9 1. Which one of the following sets of phenomena would increase on raising the temperature? (a) Diffusion, evaporation, compression of gases (b) Evaporation, compression of gases, solubility (c) Evaporation, diffusion, expansion of gases (d) Evaporation, solubility, diffusion, compression of gases 2. Seema visited a Natural Gas Compressing Unit and found that the gas canbe liquefied under specific conditions of temperature and pressure. Whilesharing her experience with friends she got confused. Help her to identify the correct set of conditions (a) Low temperature, low pressure (b) High temperature, low pressure (c) Low temperature, high pressure (d) High temperature, high pressure 3. The property to flow is unique to fluids. Which one of the followingstatements is correct? (a) Only gases behave like fluids (b) Gases and solids behave like fluids (c) Gases and liquids behave like fluids (d) Only liquids are fluids 4. During summer, water kept in an earthen pot becomes cool because of thephenomenon of (a) diffusion (b) transpiration (c) osmosis (d) evaporation 5. A few substances are arranged in the increasing order of ‘forces of attraction’between their particles. Which one of the following represents a correctarrangement? (a) Water, air, wind (b) Air, sugar, oil (c) Oxygen, w...