<1, 2, 3> x (7.6 <-5.3, -4.8, -3.9>) x stands for cross product
What does the above notation mean?
Multiply 7.6 to each component of the velocity vector to obtain the linear momentum vector. Find the cross product of the position vector and the linear momentum vector. That gives you the angular momentum vector.
7.6 * -5.3 = -40.28
7.6 * -4.8 = -36.48
7.6 * -3.9 = -29.64
Cross Multiplication
-40.28 1 = -80.56 - (-36.48)
-36.48 2
-40.28 1 = -120.84 - (-29.64)
-29.64 3
-36.48 2 = -109.44 - (-59.28)
-29.64 3
answer is (-91.2) - (50.16) + 117.04 = -24.32
I think it would have to be B.
Answer: The thermal efficiency of the engine is 41.09 %.
Explanation:
Efficiency is the ratio of the useful work performed to the total energy expended or heat taken in.
Formula for thermal efficiency of engine is
= efficiency
= heat rejected = 266.7 kJ
= heat extracted = 452.8 kJ
Putting in the values we get:
The thermal efficiency of the engine is 41.09 %.
A : lighter than lead shot, reducing its velocity and distance
