A golf club with 65J of kinetic energy strikes a stationary golf ball with a mass of 46g. The energy transfer is only 20% efficient. Calculate the initial speed of the golf ball
Answers
The initial velocity of the ball is v = 23.8 m/s
How to find the initial speed?
We know that kinetic energy is given by:
KE = m*v²/2
Where m is the mass in kg, and we know that the energy transfer is 20% of the intial 65J, then we can write:
0.2*65 = (0.046)*v²/2
Solving this equation for v, the velocity, we get:
v = √[0.2*65*2/0.046]
v = 23.8 m/s
Learn more about kinetic energy:
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kinetic energy supplied to golf ball = 20% of 65 = 0.2 * 65 = 13J,
kinetic energy of ball = [mass * Velocity²]/2,
mass = 46gm = 0.046Kg,
[0.046 * V²]/2 = 13, or 0.046 *V² = 26,
V² = 26/0.046 = 565.22,
V = 23.77 m/sec = initial velocity of golf ball after hitting.
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Answer:
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Explanation:
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The statement made by the martian when he accidentally landed on Venus was that "I didn't planet (plan) it this way".
The question simply relates to a riddle. A riddle simply means a statement, phrase, or question that has a double or veiled meaning that is put forth as a puzzle to be solved by others.
It should be noted that the statement made by the martian when he accidentally landed on Venus was that "I didn't planet (plan) it this way".
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B. Sample A would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the largest.
C. Sample C would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest.
D. Sample C would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the largest.
Answers
Answer: Option C: Sample C would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest.
Explanation:
The absorption coefficient of the samples is given. Sample A has 30%, Sample B has 47% and Sample C has 62%. This means that sample C absorbs the most percentage of energy incident on it. The energy in the reflected wave would be least. Hence, it would be best to use for a room to make it soundproof.
The correct answer is Option C) Sample C would be best, because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest.
As the coefficient of absorption would define the energy present in the reflected wave, the material C has the highest percentage of absorption i.e. 62% and would be best suitable to make a sound proof room.
Answers
Answer:
The answer is
84.9 kPa
Explanation:
Using Boyle's law to find the final pressure
That's
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we are finding the final pressure
From the question
P1 = 115 kPa
V1 = 480 mL
V2 = 650 ml
So we have
We have the final answer as
84.9 kPa
Hope this helps you
Answers
= (1/2)*1*3² = 0.5 *1 * 9 = 4.5
Kinetic Energy = 4.5 Joules
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The NE Patriots will. Just you wait and see. And when thay do, remember
that you saw the correct prediction right here on Brainly, posted by AL2006.