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1. ### Einstein ???

... some work done. He was supposed to add the numbers from 1 to 100 . Gauss came up with the answer very quickly and amazed ...

3 Answers · Science & Mathematics · 09/03/2008

2. ### Why round the numbers if you want to be precise in physics?

...the same precision as the other numbers . Pretend that you...because they could be 49.550000 to 50.049999). Now, if...might not be enough to buy just 100 cords, they might need to buy just 1 more to cover the error in length...

4 Answers · Science & Mathematics · 17/09/2009

3. ### Change of state - Ice to Steam?

... 1 mole of water ( 100 C) to 1 mole of steam ( 100 C): enthalpy change of vaporisation...or 2260J or 540 calories (all numbers are approximations and ...

2 Answers · Science & Mathematics · 06/06/2011

4. ### If 100 J work are done by lifting a box 1 .5 m, then how much mass was the box?

... = m*g*h Work = m*g*h m = Work / (g*h) Plug in numbers m = 100 J / (9.81 m/s^2 * 1 .5 m) = 6.80 kg 2nd case Are you changing the energy by ...

5 Answers · Science & Mathematics · 24/02/2014

5. ### Two people pull as hard as they can on ropes attached to a boat of mass 100 kg. If they pull in?

...when they pulled against one another. Do some simple algebra. Two numbers add up to two and their difference is one. a1 + a2 = 2 m/s^2 a1 - a2 = 1 m/s^2 a1 = 3/2 m/s^2 a2 = 1 /2 m/s^2 Then just use Newton...

4 Answers · Science & Mathematics · 01/07/2008

6. ### How much energy is required to change a 20 g ice cube from ice at -40°C to steam at 100 °C?

...liquid form to gas form (steam) at 100 C (no temperature change...only) All these 4 numbers should be calculated.../kg Simply to heat the water in its...mass is 0.02 kg 1 ) 4.18 kJ / kgC...

3 Answers · Science & Mathematics · 14/04/2008

7. ### Simple Physics Problem: A wooden raft, 100 m2 in area and 0. 1 m thick and of the specific gravity 0.7, floats in a lake of density 1000 kg/?

...s determine the volume of the raft. V = 100 * 0. 1 = 10 m^3 To determine the weight of the boat, use the ...determine the weight of the people, subtract these two numbers . Weight = 98,000 – 68,600 = 29,...

1 Answers · Science & Mathematics · 08/11/2015

8. ### What does "one part in 10 to the power of 100 " mean?

Try far smaller numbers . 1 part in 10 for example. Then it means a fraction...left. 1 part in 1000. My tyres normally run at 100 psi. if I lose 1 part in 1000 then I will ...

5 Answers · Science & Mathematics · 15/04/2014

9. ### why dont numbers greater than one work when you take their sine inverse?

... the sine of the angle is 1 .02, then the ratio of opposite/ hypotenuse = 1 .02. For this to be true a side of the triangle would be larger than the hypotenuse (which is...

2 Answers · Science & Mathematics · 01/12/2012

10. ### With what speed does the tip of a 1 m ruler ( 100 g in mass) fall and hit a desk?

... depends on the drag-coefficient of the atmosphere (air-pressure) in regard to the surface of the ruler. In a perfect vacuum a 1 meter fall would take the square-root of 9.80665 seconds regardless of the weight of...

2 Answers · Science & Mathematics · 18/03/2007