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Iteru [2.4K]
3 years ago
10

4. Brandon throws a tennis ball vertically upward. The ball returns to the point of release after 4.0 s. What is the

Physics
1 answer:
vekshin13 years ago
6 0

Answer:

-39.2m/s

Explanation:

Using the equation of motion;

v = u + at

Since the ball is thrown upward, the acceleration due to gravity acting on it will be negative, hence a = -g

v = u - gt

Since g = 9.8m/s²

t = 4.0s

u = 0m/s

v = 0 + (-9.8)(4)

v = 0 + (-9.8)(4)

v = -39.2m/s

Hence the speed of the ball before release is -39.2m/s

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Explanation:

The turning effect of a force is called moment .

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Explain The Big Bang Theory in 100 Words​
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Answer:

The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today.

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HOPE IT HELP

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3 years ago
In a process called pair production, an energetic
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Answer:

(3) mass-energy must be conserved

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As we know that gamma rays are mass less and charge less photons which will have sufficient energy.

Now in case of Pair production the gamma photons convert its whole energy into  mass by the law of Einstein's mass energy equivalence relation.

As per his relation we can say

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now we also have to think that here the two particles must have a pair of particles and antiparticles so that the combined mass system will have energy equivalent to the energy of gamma photons and also it must follow the conservation of charge

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statuscvo [17]

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Knowing that one cubic centimeter weighs one gram, 1000 cubic centimeters would weigh 1000 * 1, or 1000g, or one kilogram.

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Learn more about the Measurement of mass with the help of the given link:

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To solve this problem we will apply the concept given by the law of gravitational attraction, which properly defines gravity under the function

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