Answer:
the ratio of the heat rejected to the cold reservoir for the improved engine to that for the original engine is 0.68
Explanation:
Given information
initial efficiency, η
= 0.28
final efficiency, η
= 0.51
ratio of the heat rejected = (1 - η)/(1 - η)
= (1 - 0.51)/(1 - 0.28)
= 0.68
Answer:
2 m/s²
Explanation:
Given:
v₀ = 0 m/s
v = 20 m/s
t = 10 s
Find: a
a = (v − v₀) / t
a = (20 m/s − 0 m/s) / 10 s
a = 2 m/s²
Vectors have both size and direction.
Vectors are indicated with arrows.
Vectors can have positive or negative values.
The way I see it, depending on what the number represents, the number in the decimals spot could mean something significant. hope this helps :)
Answer:
Option D
MA=5
Explanation:
Mechanical advantage is the the ratio of the output force to the input force hence
Substituting 15 inches for the effort arm length and 3 inches for the load arm length then we obtain the mechanical advantage as
