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3 years ago

For communication to take place, there has to be:

Physics

1 answer:

sasho [114]3 years ago

3 0

Answer:

C. Sharing of the message

Explanation:

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The fastest possible rate of rotation of a planet is that for which the gravitational force on material at the equator just bare

Brums [2.3K]

Answer:

6862.96871 seconds

Explanation:

M = Mass of Planet

G = Gravitational constant

r = Radius

$\rho$ = Density

T = Rotation period

In this system the gravitational force will balance the centripetal force

$G\frac{Mm}{r^2}=mr\omega^2$

$\omega=\frac{2\pi}{T}$ .

$M=\rho v\\\Rightarrow M=\rho \frac{4}{3}\pi r^3$

$\\\Rightarrow G\frac{Mm}{r^2}=mr\left(\frac{2\pi}{T}\right)^2\\\Rightarrow \frac{G\rho \frac{4}{3}\pi r^3}{r^3}=\frac{4\pi^2}{T^2}\\\Rightarrow T=\sqrt{\frac{3\pi}{G\rho}}$

Hence, proved

$T=\sqrt{\frac{3\pi}{6.67\times 10^{-11}\times 3000}}\\\Rightarrow T=6862.96871\ s$

The rotation period of the astronomical object is 6862.96871 seconds

7 0

3 years ago

it is said that a fool and his money ate soon parted.Suppose we place the fool and gold brick in the middle of a frictionless,fr

Pavel [41]

He could theoretically push the gold brick away from himself, and due to Newton's 3rd law (Every action has an equal and opposite reaction), the same amount of force would recoil back at him from the gold brick. As a result, he will move in the opposite direction from the gold brick, and since it as an ideal frozen lake (meaning there is no friction present), he will keep going until he reaches the edge of the lake.

And I don't know if he's still a fool. That's up to you.

3 0

3 years ago

In hydroelectric dams, gravitational potential energy is used to produce electrical energy. What is the mass of water that must

ddd [48]

What mass of water must fall 12m in order to lose 10,800J of gravitational potential energy ?

Potential energy = (mass) x (gravity) x (height)

10,800J = (mass) x (9.8 m/s²) x (12m)

Mass = (10,800J) / (9.8 m/s² x 12m)

Mass = (10,800 / 9.8 x 12) (Joule-sec²/m²)

(Units: Joule-sec²/m² = N-m-sec²/m² = (kg-m/s²)-m-sec²/m² = kg )

Mass = 91.8 kg

5 0

3 years ago

How long will it take an object to move 100 meters if the object is traveling with an average speed of 0.5 meter per second

ladessa [460]

Input:

s = 100 m

v = 0.5 m/s

t = ?

Equation:

v = s / t

t = s / v

t = 100 [m] / 0.5 [m/s]

t = 200 s

Answer: 200 seconds.

7 0

4 years ago

What does force mean in bio mechanics

Marina86 [1]

Answer:

Brainliest??

Explanation:

Force is simply a push or a pull exerted by one object on another. For an example, when a muscle contracts it creates a force that is transferred to the tendon to pull on the bony attachment, thus resulting in motion.

5 0

3 years ago