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evablogger [386]
3 years ago
10

What is frictional force?​

Physics
1 answer:
Ostrovityanka [42]3 years ago
3 0

Answer:

<u><em>Frictional force refers to the force generated by two surfaces that contacts and slide against each other.</em></u>

~Hope this helps~ T^T

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The moon’s rotational period and revolution period are equal. What is the result of this? Enter your answer in the space provide
beks73 [17]

Answer The Moon has synchronous rotation: it's rotation period is the same as its period of revolution

Explanation:

The Moon has synchronous rotation: it's rotation period is the same as its period of revolution

5 0
3 years ago
What can result if an earthquake causes a sudden vertical change in the sea floor?
andrezito [222]
The answer is A, a tsunami.
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A planet of mass m 6.75 x 1024 kg is orbiting in a circular path a star of mass M 2.75 x 1029 kg. The radius of the orbit is R 8
Umnica [9.8K]

Answer:

The orbital period of the planet is 387.62 days.

Explanation:

Given that,

Mass of planetm =6.75\times10^{24}\ kg

Mass of star m'=2.75\times10^{29}\ kg

Radius of the orbitr =8.05\times10^{7}\ km

Using centripetal and gravitational force

The centripetal force is given by

F = \dfrac{mv^2}{r}

F=m\omega^2r

We know that,

\omega=\dfrac{2\pi}{T}

F=m(\dfrac{2\pi}{T})^2r....(I)

The gravitational force is given by

F = \dfrac{mm'G}{r^2}....(II)

From equation (I) and (II)

m(\dfrac{2\pi}{T})^2r=\dfrac{mm'G}{r^2}

Where, m = mass of planet

m' = mass of star

G = gravitational constant

r = radius of the orbit

T = time period

Put the value into the formula

T^2=\dfrac{4\pi^2R^3}{m'G}

T^2=\dfrac{4\times(3.14)^2\times(8.05\times10^{7})^3}{2.75\times10^{29}\times6.67\times10^{-11}}

T=2\times3.14\times\sqrt{\dfrac{(8.05\times10^{10})^3}{2.75\times10^{29}\times6.67\times10^{-11}}}

T =3.34\times10^{7}\ s

T= 387.62\days

Hence, The orbital period of the planet is 387.62 days.

4 0
3 years ago
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A man performed 500 J of work moving a couch in his living room. It took him 10 seconds to move the couch. What was his power? 
trasher [3.6K]

Answer:

A. 50 W

Explanation:

Power = work / time

P = 500 J / 10 s

P = 50 W

7 0
3 years ago
1. What happens in terms of heat transfer the longer you sit near the fire?
MAVERICK [17]

Answer:

In a camping fire conduction serves to transfer heat through the ground from where the fire is located, spreading out in a gradual, spherical pattern. This often goes unnoticed by people who sit close to a fire, but as the ground warms, convection currents moving across it also transfer some of this heat from the solid surface to the air as well.

Explanation:

True dat

8 0
3 years ago
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