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WITCHER [35]
2 years ago
12

Prove that g is inversely proportional to the radius​

Physics
1 answer:
vaieri [72.5K]2 years ago
4 0

Answer:The acceleration due to gravity g is inversely proportional to the square of the radius in the formula g = GM / R^2 where G is the gravitational constant = 6.67 x 10^-11 Nm^2/kg^2, M is the mass of the Earth and R is the radius of the Earth

Explanation:

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A boy whirls a stone in a horizontal circle of radius 1.1 m and at height 2.1 m above ground level. The string breaks, and the s
DedPeter [7]

Answer:

212.8 m/s^{2}

Explanation:

Time taken by stone to cover horizontal distance

t=\sqrt{\frac {2h}{g}} where t is time, h is height of whirling the stone in horizontal circle, g is gravitational constant, Substituting h for 2.1 m and g for 9.81

t=\sqrt{\frac {2*2.1}{9.81}}= 0.654654 seconds

t=0.65 s

Velocity, v= distance/time

v=10/0.65= 15.27525 m/s

v=15.3 m/s

a=\frac {v^{2}}{r} where r is radius of circle, substituting r with 1.1m

a=\frac {15.3^{2}}{1.1}

a=212.8 m/s^{2}

Therefore, centripetal acceleration is 212.8 m/s^{2}

8 0
3 years ago
Before the start of a trip, air in a tire is at 320 kPa gage pressure and 27°C temperature. At the end of the trip the tire pres
tia_tia [17]

Answer:

The temperature of air in the tire is 55.57 ºC

Explanation:

Please look at the solution in the attached Word file

Download docx
7 0
3 years ago
What is the difference between virtual images produced by concave, plane and convex mirrors? What does the negative sign in the
vampirchik [111]
Hey.. the virtual image formed by a plane mirror would be the same size. If formed by a convex mirror it would be diminished and if formed by a concave mirror it would be magnified.
the negative sign in the value of magnification indicates the type of mirror, that the mirror being used is convex, and if it is positive then the mirror being used is concave mirror. The negative sign denotes that the image projected is in the inverted direction.
4 0
3 years ago
A researcher wants to know the effect of lighting on snacking behavior. He knows that young adults normally eat an average of =
horrorfan [7]

Answer:

It does not impact snacking behavior.

Explanation:

The mean of the study was 18.7 grams, which is only 2.3 grams below the actual average grams of snacks that an adult would consume while at work, after revising this you could say that theres a significant reduction, but then the standard deviation is 9.1 this means that there are still adults that are eating more than 21 gram of snacks, so the test would result inconclusive.

8 0
3 years ago
A ray of light traveling in water hits a glass surface. The index of refraction of the water is 1.33, and that of the glass is 1
kirza4 [7]

Answer:

\mu=41.5\textdegree

Explanation:

From the question we are told that:

Water index of refraction i_w=1.33

Glass index of refraction i_g=1.50

Generally the equation for Brewster's law is mathematically given by

 \theta=tan^{-1}(\frac{i_g}{i_w})

 \theta=tan^{-1}(\frac{1.50}{1.33})

 \theta=48.44 \textdegree

Therefore Angle of incident to plane  \mu (normal at 90 degree to the surface)

 \mu=90\textdegree-\theta

 \mu=90\textdegree-48.44\textdegree

 \mu=41.5\textdegree

8 0
2 years ago
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