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dimulka [17.4K]
3 years ago
15

A car goes from 20 m/s to 70 m/s in 4 seconds, what is its acceleration?

Physics
1 answer:
rusak2 [61]3 years ago
3 0

Answer:

22.5

Explanation:

its be because 20+70=90÷4 which would be 22.5

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1. A 2.10 m rope attaches a tire to an overhanging tree limb. A girl swinging on the
musickatia [10]

Answer:

29.6 kg

Explanation:

Centripetal force = mass × centripetal acceleration

F = m v² / r

88.0 N = m (2.50 m/s)² / 2.10 m

m = 29.6 kg

3 0
3 years ago
For an object like a planet, with a typical temperature of a few hundred kelvin, what kind of blackbody radiation would it princ
navik [9.2K]

Answer:

Low-temperature blackbody

Explanation:

There are 3 types of blackbody temperatures.

Low-temperature blackbody

High temperature extended area blackbody

High-temperature cavity blackbody

A Low-temperature blackbody is a type of black body radiation that has the range of -40° C to 175° C, typically between 233 K and 448 K. A perfect fit for the temperature range mentioned in the question, "a few hundred Kelvin". Therefore, it's the kind of blackbody temperature that the object would emit.

6 0
3 years ago
What is a partial and total lunar eclipse?
Minchanka [31]

Partial Lunar Eclipse:

A partial lunar eclipse is when the earth gets between the Sun and Moon. However, all three bodies are not in alignment meaning we are able to see some more like part of the moon's surface as it moves in route of the Earth's shadow.

Total Lunar Eclipse:

The three celestial bodies are perfectly aligned which allows for the earth to completely block the sun's rays from hitting/reaching the moon. The sun is positions is in back of the Earth which then causes the shadow of the earth to be cast on the Moon covering the moon completely. When that happens you get the phenomenon called a total lunar eclipse.

Hopefully this helped and good luck.



7 0
3 years ago
In order to go in a circle at a constant speed an object needs
maxonik [38]

Answer:

So for an object moving in a circle, there must be an inward force acting upon it in order to cause its inward acceleration. This is sometimes referred to as the centripetal force requirement. The word centripetal (not to be confused with the F-word centrifugal) means center seeking.

Explanation:

hope this helps

3 0
3 years ago
Which is a characteristic of projectile motion?
Ne4ueva [31]
A projectile<span> is an object upon which the only force acting is gravity. Many </span>projectiles<span> not only undergo a vertical </span>motion<span>, but also undergo a horizontal </span>motion<span>. That is, as they move upward or downward they are also moving horizontally.</span>
3 0
4 years ago
Read 2 more answers
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