Why does Lahaina Noon happen? When the Hawaii sun is directly overhead and casts no shadow, Lahaina Noon travels through the islands from south to north. This only happens in the tropics as the sun does not pass directly overhead in other parts of the world. Hawaii stands alone in the US as having this…
Category: Useful tips
Why do earthquakes on the same fault have different magnitudes?
Why do earthquakes on the same fault have different magnitudes? Even for a given magnitude type, there can be differences in magnitude estimates from different agencies. These differences generally arise due to the use of different Earth models, data availability and data processing. The USGS National Earthquake Information Center reports on earthquakes worldwide. Is it…
What is the probability that the student will be a boy?
What is the probability that the student will be a boy? This means that the probability of choosing a boy OR an A student is 1 – 3/14, or 11/14. Can a boy go to an all girl school? You cannot as a male go to a girls school. How does a girl differ from…
What does a correlation of 0.9 mean?
What does a correlation of 0.9 mean? The sample correlation coefficient, denoted r, For example, a correlation of r = 0.9 suggests a strong, positive association between two variables, whereas a correlation of r = -0.2 suggest a weak, negative association. How do you find the variance of a correlation? The strength of the relationship…
What perfume makes you sneeze?
What perfume makes you sneeze? Before you know it, you may sneeze, cough, and get a stuffy, runny, or itchy nose. Headaches and rashes aren’t out of the question, either. For some people, these symptoms are caused by an allergic reaction to fragrances, which means their immune system — the body’s defense against germs —…
Does your body ever get used to night shift?
Does your body ever get used to night shift? It takes about 10 days for the body to adjust to night shift work. However, it is common for night shift workers to revert to daytime routines for a day or two during days off, which tends to make the circadian rhythm unstable. It can be…
Is there any sequence in prime numbers?
Is there any sequence in prime numbers? The first 25 prime numbers (all the prime numbers less than 100) are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 (sequence A000040 in the OEIS). . Therefore, every prime number…
Why do we divide by N-1 in the formula for sample standard deviation?
Why do we divide by N-1 in the formula for sample standard deviation? measures the squared deviations from x rather than μ . The xi’s tend to be closer to their average x rather than μ , so we compensate for this by using the divisor (n-1) rather than n. Why do we use N-1…
What makes the two artworks Mona Lisa and the Last Supper so easily recognized?
What makes the two artworks Mona Lisa and the Last Supper so easily recognized? The specific themes that Da Vinci wanted to communicate to his audience influenced the naming of the two paintings. Mona Lisa and the Last Supper paintings portray ancient cultural issues. The Last Supper painting depicts Jesus and his disciples who were…
How do you store wind and solar energy?
How do you store wind and solar energy? Renewable Energy Storage. The need to harness and utilize renewable energy has never been greater. Lead batteries can provide energy storage capabilities for commercial wind and solar farms, as well as residential and community-based installations, to capture energy generated by the wind and sun. What is the…