नया आविष्कार - How to Make a Rocket With Plastic Bottle! #Shorts #Magnetbrains #bestoutofwaste

Which plastic is used : for making bottles, jars and thin films.

The process of marketing incolves creating a market offering and to satisfy and wants of the present and potential buyers. The real question is how to create a market offering. Suppose, after gathering and analysing market information, a profitable business opportunity is seen by some firm in the field of producing soft drinks. To develop and market a new brand of soft drinks, the firm takes a number of important decisions, for example whether to go for any collaboration with a foreign manufactures of the new product so that it is attractive to the target customers, whether the drink will be packed in glass bottles or plastic cans, what will be the name (brand name ) of the drinks, at what price it will be sold (at par with the price at which other competitive brands are sold or below it or above it), and so on. (a) Identify and explain the two features of marketing discussed above. (b) Identify and explain any functions of marketing discussed above.

Read the passage given below and answer the questions that follow. Screaming is exhibited by many animals, but no species uses this extreme vocalization in as many different contexts as humans. Though we're pretty good at recognizing a scream when we hear one, the wide variety of screams makes it difficult to pin down what defines them. To study screams is to probe the fuzzy boundary that separates humans from the rest of the animal kingdom. It is a way to explore our pre-linguistic past. Although we are fully symbolic creatures today, on occasion a trace of our primal selves bubbles to the surface in the form of a scream. Understanding its characteristics could improve the treatment of nonverbal patients, help fight crime, or simply make movies more frightening. But first scientists need to explain what makes a scream a scream. To that end, researchers at Emory University’s Bioacoustics Laboratory recruited 181 volunteers to listen to short recordings of 75 nonverbal human vocalizations, such as screams, laughter, and crying. For each of the 75 sounds, the volunteers were asked to indicate whether they thought it was a scream. The researchers then analyzed 28 acoustic signatures of the sounds, such as pitch, frequency, and timbre, to determine which parameters influence the perception of a sound as a scream. Most people would say that the defining characteristic of a scream is that it is a focused loud and highpitched, but previous scream research suggests otherwise. In 2015, David Poeppel, a neuroscientist at New York University and the Max Planck Institute, led a study to determine the acoustic qualities that differentiate fearful screams from other nonverbal vocalizations. To do this, Poeppel and his colleagues compiled a corpus of screams lifted from YouTube videos and ones recorded in their lab, then asked volunteers to rank them according to how alarming the sound was. Poeppel also imaged the brains of his volunteers as they listened to screams to see how these sounds affected neural activity. Why did Poeppel image the brains of his volunteers.

What will happen if you make two tiny holes of the same size at equal heights from the bottom in a plastic bottle filled with water? What does this experiment prove?

A spaceship approaches the Moon along a parabolic trajectory which is almost tangent to the Moon's surface. At the moment of the maximum approach the brake rocket was fired for a short time interval, and the spaceship was transferred into a circular orbit of a Moon satellic. Find how the spaceship velocity modulus increased in the process of braking.