3 years ago

Household chores are a good way to fit exercise into your everyday ruotine

Physics

1 answer:

MrMuchimi3 years ago

3 0

True, but is that your question?

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How many protons does this atom have?

Brrunno [24]

The protons an atom has is 36
The neutrons an atoms has is 6
The electrons an atom is equal to the protons

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1. The speaker uses needles from two

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1. Georgia

2. Ten

3. Repeating

Explanation:

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A 1.5m wire carries a 4 A current when a potential difference of 63 V is applied. What is the resistance of the wire?

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The answer is A.They push one another apart

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If the mass of a planet is 0.231 mE and its radius is 0.528 rE, estimate the gravitational field g at the surface of the planet.

crimeas [40]

Answer:

$8.1 m/s^2$

Explanation:

The strength of the gravitational field at the surface of a planet is given by

$g=\frac{GM}{R^2}$ (1)

where

G is the gravitational constant

M is the mass of the planet

R is the radius of the planet

For the Earth:

$g_E = \frac{GM_E}{R_E^2}=9.8 m/s^2$

For the unknown planet,

$M_X = 0.231 M_E\\R_X = 0.528 R_E$

Substituting into the eq.(1), we find the gravitational acceleration of planet X relative to that of the Earth:

$g_X = \frac{GM_X}{R_X^2}=\frac{G(0.231M_E)}{(0.528R_E)^2}=\frac{0.231}{0.528^2}(\frac{GM_E}{R_E^2})=0.829 g_E$

And substituting g = 9.8 m/s^2,

$g_X = 0.829(9.8)=8.1 m/s^2$

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3 years ago