Explanation:
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Answer:
792 J
Explanation:
The total energy of the ball is E = U + K where U = potential energy = mgh and K = kinetic energy = 1/2mv²
E = mgh + 1/2mv² where m = mass of ball = 2.0 kg, g = acceleration due to gravity = 9.8 m/s², h = height of building = 20.0 m, v = initial velocity of ball = 20.0 m/s.
So, substituting the values of the variables into E, we have
E = mgh + 1/2mv²
= 2.00 kg × 9.8 m/s² × 20.0 m + 1/2 × 2.00 kg × (20.0 m/s)²
= 392 J + 400 J
= 792 J
Answer:
May 29, 2020 — Using activities like POE (Predict-Observe-Explain) can help think about and then question their existing ideas.
Explanation:
YAY
Answer:
Part a)
Part b)
Part c)
in order to find the average speed we need to know about the the gas molar mass or we need to know which gas it is.
Explanation:
Part a)
As per ideal gas equation we know that
here we know that
n = 3.80 moles
now from above equation we have
Part b)
Average kinetic energy of the gas is given as
here we know that
T = 425.6 K
now we have
Part c)
in order to find the average speed we need to know about the the gas molar mass or we need to know which gas it is.
False because that’s not possible