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forsale [732]
3 years ago
15

Below is a nuclear equation. What number should go in the place marked (i)?

Physics
1 answer:
valina [46]3 years ago
6 0
Djdjdjddjddkjddiejrjrrjrjrkrkrkrjrjr
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I think it might just be c because that is the only reasonable option
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A person walks 9.0 km directly east and then turns left and heads directly north for 12.0 km. What is his displacement from the
Readme [11.4K]

Explanation:

Given that,

A person walks 9.0 km directly east and then turns left and heads directly north for 12.0 km.

We need to find his displacement from the starting position.

We know that,

Displacement = shortest path covered

D=\sqrt{9^2+12^2} \\\\D=15\ km

For direction,

\theta=\tan^{-1}(\dfrac{d_y}{d_x})\\\\\theta=\tan^{-1}(\dfrac{12}{9})\\\\= $$53.13^{\circ}

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3 years ago
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Olenka [21]

Answer:−4.05

Explanation:

3 0
3 years ago
Use Einstein’s energy equation to solve the following problem. Recall that the speed of light is 3 x 108 m/s. If a 5.0-kg stone
Blizzard [7]

E =mc²

   = (5.0-kg)(3 x 10^8 m/s)²

   = (5.0-kg) (9×10^16m²/s²)

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7 0
3 years ago
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What is the fraction of the hydrogen atom's mass (11h) that is in the nucleus? the mass of proton is 1.007276 u, and the mass of
Alex_Xolod [135]

The mass fraction of the hydrogen atom is 0.9995 u.

<h3>Calculation:</h3>

We know that mass fraction can be determines as,

Mass fraction = Mass of proton/mass of H atom

Given,

Mass of proton = 1.007276 u

Mass of H atom = 1.007825 u

Put the values in the formula,

Mass fraction = Mass of proton/mass of H atom

Mass fraction = 1.007276/1.007825

                       = 0.9995 u

Hence, the mass fraction of the hydrogen atom is 0.9995 u.

Learn more about mass fraction here:

brainly.com/question/9639161

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2 years ago
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