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3 years ago

The number of protons in a neutral atom equals the number of

Physics

1 answer:

Dmitrij [34]3 years ago

8 0

Answer: Electrons

Explanation: For a neutral atom the number of positively charged protons inside the nucleus must be equal to the number of electrons in the orbital shells. Both charges will cancel out having a charge of 0 which makes an atom electrically neutral.

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assuming birdman flies at height of 72m, how fast should he fly to hit bucket at 63m from start of field. gravity is -9.8m/s^2 n

algol [13]

Answer:

.....Birdman?

Explanation:

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3 years ago

In which way does the popularity of modern sports help advance a society

Anastasy [175]

The popularity of modern sports help advance a society by bringing people together.

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3 years ago

A uniform rod is set up so that it can rotate about a perpendicular axis at one of its ends. The length and mass of the rod are

igor_vitrenko [27]

Answer:

0.231 N

Explanation:

To get from rest to angular speed of 6.37 rad/s within 9.87s, the angular acceleration of the rod must be

$\alpha = \frac{\theta}{t} = \frac{6.37}{9.87} = 0.6454 rad/s^2$

If the rod is rotating about a perpendicular axis at one of its end, then it's momentum inertia must be:

$I = \frac{mL^2}{3} = \frac{1.27*0.847^2}{3} = 0.303kgm^2$

According to Newton 2nd law, the torque required to exert on this rod to achieve such angular acceleration is

$T = I\alpha = 0.303*0.6454 = 0.196 Nm$

So the force acting on the other end to generate this torque mush be:

$F = \frac{T}{L} = \frac{0.196}{0.847} = 0.231 N$

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3 years ago

An astronaut takes an iPod onto the space shuttle. An identical iPod remains on Earth. Which statement about the pull of Earth's

maria [59]

The answer is actually B

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2 years ago

Read 2 more answers

Suppose that a pane of crown glass, with a refractive index of 1.52, is immersed in water, which has a refractive index of 1.33.

mylen [45]

Answer:

the angle made by this ray with normal will be 45°

Explanation:

given,

refractive index of crown glass = 1.52

refractive index of the water = 1.33

ray of light in water strikes glass at 45°

angle subtended by the light when it reenter water = ?

When light enter in the glass from the water it get bend toward normal because refractive index of glass is more than water.

And when ray comes out of the glass it is parallel to the initial light ray.

hence, the angle made by this ray with normal will be 45°

3 0

2 years ago