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4 years ago

An unstable nucleus results from too many or too few A) electrons. B) neutrons. C) protons. D) radons.

Physics

1 answer:

BartSMP [9]4 years ago

6 0

B is most likely to fall apart. Please Mark Brainliest!

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Light travels through space at a speed of 299,792,458 m/s. how fast is that in miles per minute

Bezzdna [24]

Answer:

11 176 943.8 miles per minute

Explanation:

according to a reliable source

4 0

3 years ago

A uniform solid ball with a mass , M, is placed at the top of an inclined plane and released. What will be the velocity of the b

eimsori [14]

Answer: $v=\sqrt{\frac{10}{7}\cdot gH}$

Explanation:

Given

Mass of ball is M

Height of incline is H

Here conservation of energy will provide the velocity at bottom

Energy at top of incline plane $=MgH$

Energy at bottom=Kinetic energy+Rotational energy

Assuming Pure rolling we can write

$v=\omega R$

where $v$ =velocity of ball

$\omega$ =angular velocity of ball

R=radius of ball

$E_b=\frac{1}{2}Mv^2+\frac{1}{2}I\omega ^2$

where I=moment of inertia of ball

$I=\frac{2}{5}MR^2$

$E_b=\frac{1}{2}Mv^2+\frac{1}{2}\times \frac{2}{5}MR^2\times (\frac{V}{R})^2$

$E_b=\frac{7}{10}Mv^2$

Now ,

$MgH=\frac{7}{10}Mv^2$

$v=\sqrt{\frac{10}{7}\cdot gH}$

8 0

3 years ago

the mass of earth is 5.972 * 1024 kg, and the radius of earth is 6,371 km. a 750 kg satellite orbits 35,800 km above earth in a

adelina 88 [10]

The speed or the tangential velocity of the satellite to keep it in its orbit is 3,073.5 meters per second.

The gravitational force between two objects is given by:

F = GMm/r²

Where:

G = constant of gravity = 6.674 x 10⁻¹¹ N.m²/kg²

M, m = mass of each object

r = distance between objects

Parameters given in the problem:

M = 5.972 x 10²⁴ kg

m = 750 kg

r = 6371 + 35,800 = 42,171 km = 42,171,000 m

Hence,

F = 6.674 x 10⁻¹¹ x 5.972 x 10²⁴ x 750 / 42,171,000²

= 168.1 N

This is equal to centripetal force:

F = m . v² / r

168.1 = 750 . v² / 42,171,000

v² = 9,446,304

v = 3,073.5 m/s

Hence, the tangential velocity of the satellite to keep it in its orbit is 3,073.5 m/s

Learn more about gravitational force here:

brainly.com/question/23504494

#SPJ4

5 0

1 year ago

PLS HELP! What is the gravitational field strength on the moon?

astra-53 [7]

The gravitational field strength on the moon is $\frac{1}{6}$ of the gravitational field strength on the earth

On the earth:

the gravitational field strength (g) is determined as:

$g=G\frac{m}{r^2}$

where:

G: the gravitational constant
m: the mass of the earth
r: the radius of the earth

$g=9.8 N/kg = 9.8 m/s^2$

Then on the moon:

$g=[tex]\frac{1}{6}$ *9.8=1.6 N/kg[/tex]

The answer will be : A.1.6 N/kg

5 0

4 years ago

Why do we have seasons? Give 3 reasons.

WARRIOR [948]

The tilt of the Earth's AXIS is the most important reason why seasons occur. We have hot summers and cold winters because of the tilt of the Earth's axis. The tilt of the Earth means the Earth will lean towards the Sun (Summer) or lean away from the Sun (Winter) 6 months later.

6 0

3 years ago