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Nezavi [6.7K]
2 years ago
5

Distance is 80 seconds is 8 what is the average speed?

Physics
1 answer:
True [87]2 years ago
8 0

Answer:

speed =distance /time

speed =80/8

speed =10m/s

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What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 se
shusha [124]

Answer:

Acceleration, a=\dfrac{1}{8}(-i+9j)\ m/s^2

Explanation:

Initial velocity of a particle in vector form, u = (-5i - 2j) m/s

Final velocity of particle in vector form, v = (-6i + 7j) m/s

Time taken, t = 8 seconds

We need to find the magnitude of acceleration vector. The changing of velocity w.r.t time is called acceleration of a particle. It is given by :

a=\dfrac{v-u}{t}

a=\dfrac{(-6i+7j)\ m/s-(-5i-2j)\ m/s}{8\ s}    

a=\dfrac{(-i+9j)}{8\ s}\ m/s^2    

or

a=\dfrac{1}{8}(-i+9j)\ m/s^2

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F sub n is an example.
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A weightlifter lifts a 250-kg mass 0.5 meters above his head, how much PEg does the mass have (Note: g=9.8 m/s2)? Round your ans
morpeh [17]

Answer:

1225 J

Explanation:

The Gravitational potential energy (PEG) gained by a mass lifted above the ground is given by

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h is the height at which the object has been lifted

In this problem, we have

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h = 0.5 m

So, the PE of the object is

PE=(250 kg)(9.8 m/s^2)(0.5 m)=1225 J

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Hello There!

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The chemical equation provided shows iron rusting to form iron oxide. Use the drop-down menu to choose the coefficients that wil
Brrunno [24]

Answer:

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The original equation is:

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We notice that:

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- we have 2 atoms of O on the left, and 3 atoms of O on the right

Therefore, the equation is not balanced.

In order to balance it, we can add:

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4 Fe + 3 O_2 \rightarrow 2 Fe_2 O_3

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2 years ago
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