Answer:
a)
b) 35m/s
c) 0
d) -35m/s
e) Velocity is decreasing.
f) 70 seconds
Which energy source is formed when organic matter is trapped underground without exposure to air or moisture?. . A. natural gas.
1 answer:
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The answer is 24.84kJ.
We apply the expression for the work done by the heat engine is,
. Putting all given values in the equation we get the final answer.
What is heat engine?
- A heat engine is a machine that uses heat to generate power. It draws heat from a reservoir, uses that heat to produce work, such as move a piston or lift weights, and then releases that heat energy into the sink.
- We are given:The heat input is
. The heat output is
.
- The expression for the work done by the heat engine is,
- Substituting the given values in the above expression, we will get
=24.84kJ.
- Thus, the work done by the heat engine is 24.84kJ.
To learn more about heat engine visit: brainly.com/question/15735984
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Answer:
2.43J
Explanation:
Given parameters:
Mass of the arrow = 0.155kg
Velocity = 31.4m /s
Unknown:
Kinetic energy when it leaves the bow = ?
Solution:
The kinetic energy of a body is the energy in motion of the body;
it can be derived using the expression below:
K.E = m v²
m is the mass
v is the velocity
Solve for K.E;
K.E = x 0.155 x 31.4 = 2.43J