A heat engine is designed to do work. This is possible only if certain relationships between the heats and temperatures at the i
1 answer:
Answer:d
Explanation:
Heat engine is a device which perform work when we supplied heat from a high temperature thermal reservoir(source) and heat is rejected in low temperature reservoir(sink).
for ideal engine we consider temperature of source and sink remain constant irrespective of how much heat is extracted or supplied to them
if heat supplied
heat rejected
high temperature reservoir
low temperature reservoir
For proper working
and
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Answer:
a) Time = 2.67 s
b) Height = 35.0 m
Explanation:
a) The time of flight can be found using the following equation:
(1)
Where:
: is the final position in the horizontal direction = 80 m
: is the initial position in the horizontal direction = 0
: is the initial velocity in the horizontal direction = 30 m/s
a: is the acceleration in the horizontal direction = 0 (the stone is only accelerated by gravity)
t: is the time =?
By entering the above values into equation (1) and solving for "t", we can find the time of flight of the stone:
b) The height of the hill is given by:
Where:
: is the final position in the vertical direction = 0
: is the initial position in the vertical direction =?
: is the initial velocity in the vertical direction =0 (the stone is thrown horizontally)
g: is the acceleration due to gravity = 9.81 m/s²
Hence, the height of the hill is:
I hope it helps you!