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belka [17]
2 years ago
7

Cobalt-60 has a half life of 5.25 years. If you started with a 40 gram sample of pure cobalt-60, how many grams of cobalt-60 wou

ld remain after 10.5 years?
Physics
1 answer:
s2008m [1.1K]2 years ago
6 0

Answer:

10 grams

Explanation:

A = A₀ (½)^(t / T)

A = 40 (½)^(10.5 / 5.25)

A = 40 (½)^2

A = 40 · ¼

A = 10

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Answer:

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Explanation:

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6 0
3 years ago
Any ss2 here (11th Grade)
Sever21 [200]

Answer:

<h2>a) 50°</h2><h2>b) 40°</h2>

Explanation:

Check the complete diagram n the attachment below

a) The angle of incidence on a plane surface is the angle between the incidence ray and the normal ray acting on a plane surface. The normal ray is the ray perpendicular to the surface while the incidence ray is the ray striking a plane surface.

According to the diagram, the angle of reflection r₂ on M₂ is 90°-g where g is the angle of glance.

Given angle of glance on M₂ to be 40°, r₂ = 90-40 = 50°

According the second law of reflection, the angle of incidence = angle of reflection, therefore i₂ = r₂ = 50° (on M₂)

Also ∠OO₂O₁ =  ∠OO₁O₂ = 40° (angle of glance on M₁){alternate angle}

The angle of incidence on M₁ = 90° - 40° = 50°

b) The angle of incidence to the surface of M₁(∠PO₁A)will be the angle of glance on M₁ which is equivalent to 40°

6 0
2 years ago
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Leno4ka [110]
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<span>On the y-axis (the bottom of the table) hope this helps</span>
4 0
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a positively charged body makes contact with a body. after a while, the charged body becomes neutralised. state 3 main condition
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Answer:

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5 0
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