Category: Physics

How is fan efficiency calculated? Fan efficiency is defined as the air power divided by the fan input power. Both Static and Total Efficiency can be calculated from fan performance data as follows: wg BHP = Fan power input, hp Static and total fan efficiency (Figure 1) can be plotted along with the fan curve. […]

Which two researchers are associated with the five factor model also known as the Big Five? Since 1990, the most widely accepted personality system has been the ‘Big Five’ or five-factor model (McCrae and Costa 1997). This suggests that there are five key dimensions of personality: Neuroticism (N), Extraversion (E), Openness (O), Agreeableness (A) and […]

Which of the following is a way of conserving water? Keep a bottle of drinking water in the fridge. Put a layer of mulch around trees and plants. Water during the early parts of the day; avoid watering when it’s windy. Install water-saving shower heads and low-flow faucet aerators. What are the four methods of […]

What is solar wind in simple words? The solar wind is a stream of energized, charged particles, primarily electrons and protons, flowing outward from the Sun, through the solar system at speeds as high as 900 km/s and at a temperature of 1 million degrees (Celsius). It is made of plasma. Is solar wind visible? […]

What element forms an ion with a 2 charge? magnesium atom What element does not form an ion with a charge of 1+? Fluorine Which element does not form ions? noble gases Does fluorine form an ion with a charge of 1+? A fluorine atom has nine protons and nine electrons, so it is electrically […]

How many times has the Olympic flame gone out? So far the Olympic Flame went out 5 times. In 1976 in Montreal the fire went out due to intensive rain. In Athens in 2004 the flame went down on the historical stadium of 1896. How is the Olympic torch transported? The flame is carried by […]

Does magnitude have to be positive? Magnitude is always positive! Magnitude means quantity. When we consider magnitude, like if we consider the magnitude of velocity of an object, we only consider how fast it is moving but not in which direction it is moving. Hence the magnitude always remains positive. What is an example of […]

Why do we use k instead of thousand? K comes form the Greek kilo which means a thousand. In the metric system lower case k designates kilo as in kg for kilogram, a thousand grams. Even here there is some ambiguity. In the language of computer science K is 210 = 1024. Should I use […]

What is the net worth of the top 5 %? To be top . 5% in 2020, a household needed a net worth of $17,557,208. Is a net worth of 5 million good? Many times, net worth is considered as well. Financial advisors usually consider anyone with a net worth greater than $5 million to […]

Where can Taurus be found in the night sky? Taurus is a prominent northern constellation, lying immediately north-west of Orion. It is highest in the evening sky in the months around December. Two objects in Taurus stand out to the unaided eye: the bright star Aldebaran, the thirteenth brightest in the whole sky, and the […]