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Vinvika [58]
3 years ago
12

Which of these is NOT needed to sustain life on a planet? *

Physics
1 answer:
Vadim26 [7]3 years ago
7 0
I think it’s proximity of the sun
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4 years ago
The following quantities describe location or its change:position, distance, and a displacement. Which are vectors?
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As per the question there are three physical quantities named as position,distance and displacement.

Before coming into a conclusion first we have to understand a vector and a scalar.

A scalar quantity is a quantity which has only magnitude for it's complete specifications.

A vector is a quantity which has magnitude as well as direction and at the same time it is in accordance with the paraellogram law of vector addition.

Out of the three options displacement and position are vector quantities.It is because it is the minimum distance between two points .It has magnitude as well as direction.

Distance can not be considered as a vector quantity as it has only magnitude.There is no specific directions of distance travelled.

Position vector is a vector which provides location of an object in a plane or space.It is nothing else except the point which has x,y,z coordinates with origin is taken as the reference point.

Hence position and displacement are vectors

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3 years ago
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3 years ago
What are you calculating when forces are added together
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Answer:A

Explanation:

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3 years ago
Sasha lifts a couch 8.2 meters from the ground floor of her house to the attic. If the couch has a mass of 120 kg, what is the g
gavmur [86]

As we know that gravitational potential energy is given by

U = mgH

here we have

m = mass = 120 kg

g = 9.81 m/s^2

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now from above formula

U = 120kg (9.81 m/s^2) (8.2 m)

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3 years ago
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