What height to reach terminal velocity?

What height to reach terminal velocity?

A falling person will reach terminal velocity after about 12 seconds, falling some 450 m (about 1,500 ft) in that time. That person will not then fall any faster, so it makes no difference what distance they fall if it is more than 1,500 ft – they will still reach the ground at the same speed.

Why does the moon control the tides?

The tides are due to the gravitational pull of the Moon and the Sun on the Earth. Because the gravitational force decreases as the distance squared, the part of the Earth that is closer to the Moon or the Sun is pulled a little extra and a bulge is created.

Who is the father of mechanics?

Much of modern engineering mechanics is based on Isaac Newton’s laws of motion while the modern practice of their application can be traced back to Stephen Timoshenko, who is said to be the father of modern engineering mechanics.

Is the moon a reflection of the sun?

Of course, the light we see doesn’t originate on the Moon — the Moon (like the planets) shines by reflected sunlight. [Note in passing: the Moon’s surface is actually quite black. Only about 3% of the Sun’s light which hits the Moon is reflected. But that’s enough to light up our night sky.]

Is violet blue or purple?

In the traditional color wheel used by painters, violet and purple are both placed between red and blue. Purple occupies the space closer to red, between crimson and violet. Violet is closer to blue, and usually less intense and bright than purple.

How many times did Pete Sampras win Wimbledon?

Sampras is one of only two male players to win the same Grand Slam tournament (Wimbledon) 7 times in the span of 8 years. Sampras (1997–2000) won four consecutive Wimbledon singles titles, second only to Borg and Federer (who have five consecutive titles each).

What color is between red and blue?

In between these colours may be seen secondary colours that are, perceptually, each a mixture of two of the primaries. Thus, you will see yellow between red and green, and cyan blue between green and blue-violet. The third secondary colour of light is magenta.

Is pure water a conductor?

Pure water is not a good conductor of electricity. Ordinary distilled water in equilibrium with carbon dioxide of the air has a conductivity of about 10 x 10-6 W-1*m-1 (20 dS/m). Because the electrical current is transported by the ions in solution, the conductivity increases as the concentration of ions increases.