There are so many to choose from, I'll give you two. One is a big one. The other so/so. People used to believe the earth was flat and you would fall off, until Christopher Columbus sailed across. And another interesting one is the vulcan planet theory, which is that there was an extra planet between Mercury and T sun. however it turned out to be false. So there, need anymore just tell me.
Picking up a sheet of paper . . . work done with small force
Picking up a glass of water . . . work done with moderate force
Picking up a huge boulder . . . work done with a great tremendous force
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Standing still . . .
Holding your tongue out as far as it will go . . .
Holding your arm over your head for 3 days . . .
Holding a huge boulder motionless over your head . . .
Pushing on a brick wall . . .
Pushing as hard as you can against a truck with the wheels locked . . .
. . . . . No work done at all, because the force doesn't move through a distance.
<u>Work done = (force) times (distance)</u>
If the force doesn't move, then the distance is zero, and the work done is zero.
Two or more elements that are chemically combined
Answer:
P = 6*5 = 30 [kg*m/s]
Explanation:
in order to solve this problem, we must remember that linear momentum is defined as the product of mass by Velocity. This way you can calculate the momentum using the following equation.
P = m*v
where:
P = lineal momentum [kg*m/s]
m = mass = 6 [kg]
v = velocity = 5 [m/s]
P = m*v
P = 6*5 = 30 [kg*m/s]
Answer:
Q = 2790 J
Explanation:
Mass of silver bar is 250 g
It is heated from 22.0°C to 68.5°C
The specific heat of silver is 0.240 J/g°C
It is required to find the heat absorb by the silver bar. The heat absorbed by an object when heated from one temperature to another is given by :
So, the heat absorbed by the silver bar is 2790 J.
