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Brrunno [24]
3 years ago
9

.What​ ​is​ ​the​ ​momentum​ ​of​ ​a​ ​car​ ​with​ ​a​ ​mass​ ​of​ ​1,300​ ​kg​ ​traveling​ ​north​ ​at​ ​a​ ​speed​ ​of 28​ ​m/

s?the​ ​momentum​ ​of​ ​the​ ​car​
Physics
1 answer:
Maksim231197 [3]3 years ago
3 0
44,563 m/s
hopoe this helps
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Why do you think the area swept out by a planet in a given period of time remains constant, even as the planet speeds up and slo
Levart [38]
Not sure this is entirely right but hey why not, right. <span> A planet orbiting a star orbits in an ellipse. Sometimes it's closer to the star and sometimes it's further. When it's closer to the star, the gravity on the planet from the star is stronger, so the planet speeds up. The area the planet sweeps over is equal because when it speeds up the length covered along the orbital path is greater, but it is also closer to the star, and that dimension is decreased. And because of our very intelligently designed and organized universe, these two factors cancel each other out perfectly </span>
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3 years ago
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Which of the following best describes a property of water?
stiks02 [169]

Correct answer is option C.

Remaining liquid over a wide temperature range  

Other options are invalid.

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Dacia wants to know how to determine the polar coordinate θ. What should Katarina tell Dacia?
crimeas [40]

Answer:

r = √ x² + y²   and θ = tan⁻¹ y / x

Explanation:

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          r = √ x² + y²

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8. A car travels at a constant velocity of 70 mph for one hour. By the end of the second hour, the car’s velocity was 60 mph. At
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<u>Answer:</u>

  Positive acceleration is in third hour and negative acceleration is in second hour.

<u>Explanation:</u>

  Velocity of car in first hour =  70 mph

  Velocity of car in second hour = 60 mph

  Velocity of car in third hour = 80 mph

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DaniilM [7]

Answer:

False

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Convection currents do not produce heat. In fact, convection current are a method of transfer of heat, not of production. Convection occurs when there is a fluid which is heated from bottom, from an external source of heat (such as a pot of boiling water over a flame): the bottom part of the fluid becomes warmer, and so less dense than the colder part, therefore it starts moving up, and it is replaced by the colder parts of the fluid, which go down. Later, these colder parts become warmer, so they start going up, being replaced by new colder parts, etc... in a cycle. This is known as convection current, but it requires an external source of heat, it does not produce heat by itself.

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