SevenUP

The length of a shadow cast on level ground is proportional to the cotangent of the sun's elevation angle relative to the horizon.

Calculate the cotangent of (0.6°) then multiply by 6 feet.

Tangent (0.6) = 0.010472358322

CoTan (0.6)= (1/0.010472358322)= 95.4894751738232205

95.4894751738232205 * 6 ft. = 572.936851042939323

Length of Shadow is 573 ft.

7UP

Energy is half the mass times the square of the velocity.

$$2^2=4$$ (This 2 represents the (doubling) increase in velocity)

Disregarding other considerations, it will take 4 times the distance.

7up

Wow! Truffles. Cool.

BTW I like Roses, too. --Unlike someone on here :-)

7up

OK. I’ll find your math questions and add some points.

This is why I will only do the math questions or logic questions. Sometimes really funny posts.

http://web2.0calc.com/questions/how-do-i-solve#r9

7up

You lost 7 points?

For you, that’s like losing a bucket of water out of a swimming pool --an Olympic swimming pool. LOL

Where did you lose them? I’ll put some back –if they are math questions.

7up

Probably your autobiography.

It would not be finished until you die.

After you die, you cannot finish it.

It's a paradox.

7up

Learn to communicate in a funny (witty) manner – for you it is a natural gift, but to be that good at it requires practice.

Zegreos is funny too, but the two of you together makes it really funny and entertaining.

7up

Zegroes needs a helper! It’s all he can do to keep up with you. --I mean keep 10 or 20 steps within your range of wit. How did you ever learn to do that?

7up

Hi mari379,

You should be honored. It’s not every new member that gets a special episode of “Moonlight at the Taj Mahal” staring Rosala and Zergroes.

This is a continuing saga. It is very dramatic and entertaining, with the two best stars and a great cast of extras.

(We learn more than math here!)

7up

The easiest way is to convert all speeds to MPH

 Japanese train moves at 320 km/h

1mi/h = 1.6093km/h or 1 km/h = 1/1.6093 mi/h

Then

320 km/hr = (320km/h)/(1.6093km/h) = 198.8 mi/hr 

French train moves at 89.44 meters per second.

Convert to meters per hour by multiplying by (3600s/1h) (89.44m/s) = 321984 meters / hour

Convert meters to km by multiplying by (1km/1000m) (321984m) = 321.984 km/hr (then restore the rate)

Convert Km to miles by multiplying by (1mi/1.6093km) (321.984km) = 200.1 mi/hr (then restore the rate)

The fastest train is the French train at 200.1 mph

The Japanese train is at 198.8 mph

To have the second fastest train, the speed has to be between these two numbers.

Ellen’s train need to be 198.8mph < E < 200.1mph (E=Ellen’s train)

The hardest part was using complete sentences. Guys don’t speak in full sentences. We use short phrases and then grunt. Or we use sign language. Usually a certain finger. I guess it’s a kind of digital language.

7up