During each cycle, a refrigerator ejects 610 kJ of energy to a high-temperature reservoir, and takes in 505 kJ of energy from a
1 answer:
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Answer:
T=0.827s
Explanation:
The period of a spring can be calculated with the equation
But we know as well that w is given by,
Replacing,
So we have that
Answer:
The second ball
Explanation:
Both balls are under the effect of gravity, accelerating with exactly the same value. The first ball is dropped, therefore its initial velocity is zero. Since the second ball has horizontal and vertical velocity components, its initial velocity is given by:
The vertical component is zero, however, it has a horizontal velocity, so its initial speed is not zero, therefore the secong ball has the greater speed at ground level.
Initial speed of the skateboarder (u) = 2 m/s
Distance covered (s) = 18 m
Time taken = 3.3 seconds
Let the acceleration be a.
Using seconds equation of motion:
a = 2.09 m/s^2
Now, Acceleration down the incline = g Sin Θ
g Sin Θ = a
9.8 × Sin Θ = 2.09
Sin Θ =
Θ = 12.31°
Hence, the angle of the inclined plane is: Θ = 12.31°