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3 years ago

A container with a mass of 5 kg is lifted to a height of 8 m. How much work is done by the gravitational force

Physics

1 answer:

love history [14]3 years ago

5 0

Answer:

work done=392J

Explanation:

work done =Mgh

DATA

M=5kg

g= 9.8

h=8m

W=Mgh

W=5*9.8*8

W=392J

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3 years ago

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I have an object that I want to know when it was made. I calculate that the object contains 0.12g of Iodine-131 but started with

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Answer: 71.72 days

Explanation:

This problem can be solved using the <u>Radioactive Half Life Formula: </u>

$A=A_{o}.2^{\frac{-t}{h}}$ (1)

Where:

$A=0.12 g$ is the final amount of Iodine-131

$A_{o}=60 g$ is the initial amount of Iodine-131

$t$ is the time elapsed

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Knowing this, let's substitute the values and find $t$ from (1):

$0.12 g=(60 g)2^{\frac{-t}{8 days}}$ (2)

$\frac{0.12 g}{60g}=2^{\frac{-t}{8 days}}$ (3)

Applying natural logarithm in both sides:

$ln(\frac{0.12 g}{60g})=ln(2^{\frac{-t}{8 days}})$ (4)

$-6.21=-\frac{t}{8 days}ln(2)$ (5)

Finding $t$ :

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4 years ago

Angel hits a ball with a ball. The action is the ball . What what is reaction force?

Mumz [18]

When Angel hits a ball with the ball. As the action is a ball as it is hitted. The reaction force is the force exerted on another ball.

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As Angel hits a ball with another ball, the action is the ball as it is hit. The ball exerts a force on the ball. This is the action force. The ball exerts an equal and opposite force on the bat, which is known as the reaction force.

Learn more about Newton's Law of motion:

brainly.com/question/10454047

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2 years ago

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3 years ago

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