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Lelu [443]
4 years ago
7

Why does gravity hold objects on earth?

Physics
2 answers:
Gnom [1K]4 years ago
8 0
<span>The Sun's </span>gravitational<span> pull </span>keeps<span> our planet orbiting the Sun. The motion of the Moon is affected by the </span>gravity<span> of the Sun AND the </span>Earth<span>. The Moon's </span>gravity<span> pulls on the </span>Earth<span> and makes the tides rise and fall every day. ... The </span>Earth<span> always produces the same acceleration on every </span>object<span>.
Hope this helps have a great day :)</span>
LUCKY_DIMON [66]4 years ago
6 0
 
Gravity is an attractive force that works to pull objects together. If 2 objects are close the gravitational pull will be stronger 
Mass and distance determine gravity. The farther two things are away from each other, the weaker the gravitational forces are, the less mass an object has the less gravitational force it exerts
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A student claims an object in motion must experience a force to stay in motion. Do you agree or disagree?
Vikki [24]

Answer:

agree because there is always a force that causes motion..

4 0
3 years ago
Does voltage flow in a circuit? Explain
alekssr [168]

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5 0
4 years ago
A pulling force is called what?<br> A. normal<br> B. tension<br> C. balanced<br> D. compression
joja [24]
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3 0
4 years ago
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A bat emits a sound at a frequency of 30.0 kHz as it approaches a wall. The bat detects beats such that the frequency of the ech
Alex

Answer:

The speed of the bat is 5.02 m/s.

Explanation:

Given that,

Frequency = 30.0 kHz

Frequency of echo = 900 Hz

We need to calculate the frequency

Using formula of beat frequency

f_{b}=f_{1}-f_{2}

Put the value into the formula

900=f_{1}-30\times10^{3}

f_{1}=900+30000

f_{1}=30900\ Hz

We need to calculate the speed of the bat

Using Doppler equation

f_{apr}=f\times(\dfrac{v_{sound}+v_{observer}}{v_{s}-v_{source}})

Put the value into the formula

30900=30000\times(\dfrac{340+v_{bat}}{340-v_{bat}})

\dfrac{30900}{30000}=\dfrac{340+v_{bat}}{340-v_{bat}}

1.03=\dfrac{340+v_{bat}}{340-v_{bat}}

340\times1.03-340=v_{b}+1.03v_{b}

10.2=2.03v_{bat}

v_{bat}=\dfrac{10.2}{2.03}

v_{bat}=5.02\ m/s

Hence, The speed of the bat is 5.02 m/s.

6 0
3 years ago
A car of mass 800kg travels a distance of 40m at constant speed in a duration of 2.0s. The car exerts a forward force of 15kN.
Alex17521 [72]

W = F × s

W = 15kN × 40 m

W = 15.000 N × 40 m

W = 600.000 J

P = W/t

P = 600.000 J/2 s

P = 300.000 Watt

P = 300kWatt

#LearnWithEXO

6 0
3 years ago
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