Category: Physics

Do stars move fast? Astronomers have discovered dozens of stars that move so fast they are not bound by the Milky Way’s gravity. Some are likely to hail from other galaxies. One, a white dwarf, can be traced back to a supernova explosion. The team also rewound the paths of these stars 100,000 years in […]

What are 2 examples of mutualism? Here are three other examples of mutualistic relationships: The bee and the flower. Bees fly from flower to flower gathering nectar, which they make into food, benefiting the bees. The spider crab and the algae. The bacteria and the human. What are the 3 types of symbiosis? Symbiosis is […]

How do you use must in a sentence? Meaning 1: We use MUST when we want to say that it is necessary or very important that something happens in the present or future. Examples: I must work hard on my English! Pupils must not run in the corridors. (note: here, ‘must’ expresses a school rule.) […]

What does an athletic body type look like? If your body is muscular but isn’t particularly curvy, you might have an athletic body type. Your shoulder and hip measurements are about the same. Your waist is narrower than your shoulder and hips, but it isn’t overly-defined and looks more straight up and down. What athletic […]

Is the sun in the center of Earth orbit? The Sun is not at the centre of the Earth’s orbit. How fast does Earth revolve around sun? 30 kilometers per second How do we not feel the earth rotating? We can’t feel Earth rotating because we’re all moving with it, at the same constant speed. […]

What is the number 1 cause of stress? According to the American Psychological Association (APA), money is the top cause of stress in the United States. In a 2015 survey, the APA reported that 72% of Americans stressed about money at least some of the time during the previous month. What is the biggest source […]

Will SpaceX go to the moon? NASA has selected SpaceX to build a lander to take humans to the moon. SpaceX is going to the moon. NASA has selected the company, headed by Elon Musk, to build a lunar lander to take humans to the moon’s surface in 2024. Is Karen’s bracelet on the moon? […]

How do I find the difference between two numbers? First: work out the difference (increase) between the two numbers you are comparing. Then: divide the increase by the original number and multiply the answer by 100. % increase = Increase ÷ Original Number × 100. If your answer is a negative number, then this is […]

Why is 2s higher energy than 1s? 2-8. An atomic 2s orbital is represented by a similar sphere but with a larger radius. An electron in a 1s orbital is of lower energy than one in a 2s orbital because it spends more of its time close to the atomic nucleus. Why is 2s more […]

What is the most common ethnic group in the Middle East? ❖ Arabs are the largest ethnic group in the Middle East, living throughout North Africa and Southwest Asia. ❖ They speak Arabic, a language which originated in the deserts of the Arabian Peninsula. ❖ Today 17 countries in the Middle East are occupied with […]