Member Since February 15, 2011
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Answered: I have experienced unexlplainable night time ...

Get it on video, post it to YouTube (make sure your advertisement revenue stream is set up) and make a fortune!

Answered: Doppler radar

As stated previously doppler radar is used to measure the motion of an object. The best way to describe how it works is to think about a car passing you by. As the car approaches the sound rises in ...

Answered: Heellpp what does Au stand 4?

Au also stands for Astronomical Unit. An Au is the mean distance from the Sun to the Earth and is used to state the distances to other planets. This way it keeps the numbers smaller to deal with.

Answered: Why is plutonium's atomic symbol Pu?

Plutonium is named after Pluto (the planet/dwarf planet/plutoid, not the Disney dog) Following the naming of Neptunium (again named after the planet). Ne was already in use so Neptunium was set at Np ...

Answered: How important is relativity

As an example of how important: the Global Positioning System (GPS) uses atomic clocks for its timing. These clocks, orbiting in space at ~17,000 mph, are time-dilated due that velocity, that is ...

Answered: Simplify the expression (7x + 9) (x - 4)/ (7x ...

Simplifying (7x + 9)(x + -4)(7x + -9)(4 + -1x) Reorder the terms: (9 + 7x)(x + -4)(-9 + 7x)(4 + -1x) Reorder the terms: (9 + 7x)(-4 + x) Multiply: (9 + 7x) * (-4 + x) (-9 + 7x) * (4 + -1x) (9(-4 + ...

Answered: A proton (mass= 1.67?10-27 kg, charge= 1.6?10-19 ...

The proton is a charged particle and as such is influence by magnetic fields. The stronger the magnetic field B the greater the force imposed on the charged particle. The effect of this field is to ...

Answered: Why does spray can temperature drop when shaken

Quite simply the fluid in the can removes heat from your hand as it moves about. It's like wind chill. A moving fluid 'takes away' the heat from a local point far easier than a still fluid.

Answered: My inexpenseive gold earring turned silver in two ...

Your jewellery is inexpensive because the vast majority of the item is a basic cheap metal. To make the item look gold either a metallic paint or electrolysis is used to coat the base metal. As this ...

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