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Crank
3 years ago
8

I need help ASAP. This is for 15 points

Physics
1 answer:
Sladkaya [172]3 years ago
8 0

Answer:

the Prime Meridian is the planets line of 0 degrees longitude sometimes called the Greenwich Meridian or the international Meridian

the great circle of Earth with the latitude of 0 degrees

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An object has a position given by the radius vector r = [2.0 m + (3.00 m/s)t](i)+ [3.0 m - (2.00 m/s^2)t^2](j). Here (i) and (j)
jenyasd209 [6]

Answer:

The speed of the object is (3i - 4.00tj)m/s

The magnitude of the acceleration is 4.00m/s²

Explanation:

Given - position vector;

r = (2.0 + 3.00t)i + (3.0 - 2.00t²)j       -------------------(i)

To get the speed vector (v), take the first derivative of equation (i) with respect to time t as follows;

v = \frac{dr}{dt}

 v = \frac{d[(2.0 + 3.00t)i + (3.0 - 2.00t^2)j]  }{dt}  

v  = 3i - 4.00tj      ------------------------(ii)

To get the acceleration vector (a), take the first derivative of the speed vector in equation(ii) as follows;

a = \frac{dv}{dt}

a = \frac{d(3i - 4.00tj)}{dt}

a = -4.00j

The magnitude of the acceleration |a| is therefore given by

|a| = |-4.00|

|a| = 4.00 m/s²

In conclusion;

the speed of the object is (3i - 4.00tj)m/s

the magnitude of the acceleration is 4.00m/s²

3 0
3 years ago
How is velocity affected when balanced forces act on an object?
MrRissso [65]
When the forces acting on a body are balanced, their effect
\on the body's motion is the same as if no forces at all are
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Exercising at the Supermarket
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Answer:

I think is more easy to push an empty car because theres anything that makes the car hard to move and when it is totally full is harder because of the weight of the food or drinks and it makes the car more harder to move

Explanation:

i hope you understand me and this helps, sorry if it doesn't TT

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Answer:

The correct answers are It is the resistance of an object to changes in its motion, and It is a force

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Natasha_Volkova [10]
I believe it is relative humidity.
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3 years ago
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