<u>Answer:</u> The mass of the second car is 12666.7 kg
<u>Explanation:</u>
To calculate the mass of car, we use the equation of law of conservation of momentum, which is:
where,
= mass of car 1 = 9500 kg
= Initial velocity of car 1 = 14 m/s
= mass of car 2 = ? kg
= Initial velocity of car 2 = 0 m/s
= Final velocity = 6.0 m/s
Putting values in above equation, we get:
Hence, the mass of the second car is 12666.7 kg
It makes calculations with very large and small numbers easier.
Scientific notation is a system used in order to It makes calculations with very large and small numbers easier. It is useful as it allows very large number that would take a lot of space to write otherwise, and it allows them to be calculated easier. 
for example is a incredible large number, but written in this form is immediately understandable and useful for calculation.
Answer: The answers are Biomass, Solar, and Hydroelectric! :)
Explanation:
Since the bridge and all segments of it are static, the sum of the torques acting on any portion of the bridge you choose is zero for any pivot <span>point you may choose. See if you can find a rigid portion of the bridge and a wisely chosen pivot to which you can apply this powerful fact.
</span>Consider the triangular portion shown in bold and let x be the pivot. (This choice eliminates the torques
due to the tensions in the beams that attach at
point x.) Find the torques on this left hand
triangle (which can be considered a solid piece
because of the connections). Remember that
counterclockwise torque is positive. Assume
that the horizontal segment above is being
stretched, so that the force that the tension in
this segment exerts on the bold triangle is
directed to the right.
Express the torque in terms of T, L , and Fp.
Answer in terms of T and L :
Tt = (TL.sqrt 3) / 2
Summation Tx = -LFp - T sqrt[L^2 - (L/2)^2]
The negative value of the tension shows that the segment is actually under a compressible load. <span />
