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adell [148]
3 years ago
14

Earth’s gravity keeps the moon in orbit by pulling on it.

Physics
2 answers:
MAXImum [283]3 years ago
5 0

Answer:

A. pulls back on the Earth, which is the main cause of the rise and fall of the ocean tides on Earth.

Mnenie [13.5K]3 years ago
3 0

Answer:B number right .

Explanation:

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A word that means to squeeze a gas in to a smaller place
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Thiết bị nào sau đây không phải là nguồn điện
kumpel [21]

Thiết bị không phải nguồn điện:

Đáp án D

7 0
3 years ago
A block of mass m=1.2 kg is held at rest against a spring with a force constant k=730N/m. Initially the spring is compressed a d
igor_vitrenko [27]

Answer:

Explanation:

potential energy of compressed spring

= 1/2 k d²

= 1/2 x 730 d²

= 365 d²

This energy will be given to block of mass of 1.2 kg in the form of kinetic energy .

Kinetic energy after crossing the rough patch

= 1/2 x 1.2 x 2.3²

= 3.174 J

Loss of energy

= 365 d² - 3.174  

This loss is due to negative work done by frictional force

work done by friction = friction force x width of patch

= μmg d ,   μ = coefficient of friction , m is mass of block , d is width of patch

= .44 x 1.2 x 9.8 x .05

= .2587 J

365 d² - 3.174   = .2587

365 d² = 3.4327

d² = 3.4327 / 365

= .0094

d = .097 m

= 9.7 cm

If friction increases , loss of energy increases . so to achieve same kinetic energy , d will have to be increased so that initial energy increases so compensate increased loss .

5 0
3 years ago
Describe how a metamorphic rock might become a sedimentary rock over time.
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<span>Metamorphic rock undergoes weathering, erosion; the particles are deposited and undergo lithification.</span>
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