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3 years ago

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?

Physics

1 answer:

pav-90 [236]3 years ago

3 0

Answer:

25g

Explanation:

Given parameters:

Half life of X = 5days

Mass of sample of radioactive elements = 100g

The half-life of a radioactive material is the time it takes for a sample to decay by half. At the half-life, an original sample would have yielded equal daughter to parent ratio.

At time (days) Mass of sample

0 100g

5 50g

10 25g

Every 5 days, the sample will split into half.

Therefore, 25g will remain after 10days.

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svetoff [14.1K]

Answer:

Part 1)

H = 30.6 m

Part 2)

t = 2.5 s

Part 3)

t = 2.5 s

Part 4)

$v_f = 24.5 m/s$

Explanation:

Part 1)

initial speed of the ball upwards

$v_i = 24.5 m/s$

so maximum height of the ball is given by

$H = \frac{v_i^2}{2g}$

$H = \frac{24.5^2}{2(9.80)}$

$H = 30.6 m$

Part 2)

As we know that final speed will be zero at maximum height

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$v_f - v_i = at$

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Part 3)

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so here it is given as

t = 2.5 s

Part 4)

since the acceleration due to earth will be same during its return path as well as the time of the motion is also same

so here its final speed will be same as that of initial speed

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$v_f = 24.5 m/s$

Answer:

a = 9.76 m/s/s

Explanation:

As we know that the object is released from rest

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$y = \frac{1}{2}at^2$

$4.88 = \frac{1}{2}a(1^2)$

$a = 9.76 m/s^2$

Answer:

v = 29.7 m/s

Explanation:

acceleration of the rocket is given as

$a = 90 m/s^2$

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t = 0.33 min

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$v_f = v_i + at$

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Answer:

Part 1)

y = 25.95 m

Part 2)

d = 6.72 m

Explanation:

Part 1)

As it took t = 2.3 s to hit the water surface

so here we will have

$y = \frac{1}{2}gt^2$

$y = \frac{1}{2}(9.81)(2.3^2)$

$y = 25.95 m$

Part 2)

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$d = v_x t$

$d = 2.92 \times 2.3$

$d = 6.72 m$

6 0

3 years ago

A skateboarder with a mass of 60 kg moves with a force of 20 N. What is her acceleration?

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Explanation:

Solution,

Mass(m)= 60 kg
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F=ma
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3 years ago

What charge do electrons have?<br>Negative<br>Positive<br>Neutral

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Answer electrons are negative. Protons are positive, and neutrons are neutral

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3 years ago

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The electrons making the shock come from the women's body.

<h3>What is Electric shock ?</h3>

When a high voltage current flows through the body, electrical shock results. When someone unintentionally touches an electrical source, this typically occurs. Treatment for both internal and exterior burns may be necessary as part of the aftercare.

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How to Prevent from Electrical Shocks –

Keep the Appliances Away from Moisture and Water.
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to learn more about electric shock go to - brainly.com/question/8822505

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2 years ago

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To know more about cornea, refer: brainly.com/question/13866057

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2 years ago

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?