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Kruka [31]
3 years ago
13

1. Which of the following statements describes a physical property?

Physics
1 answer:
Rama09 [41]3 years ago
8 0

<span>Physical property is a  property that is measurable whose value describes a state of physical property</span>

<span />

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A car starts from 0 m along a road and accelerates at 0.5 m/s^2 to the right. A second car starts from 1000 m along the road and
Brrunno [24]

Answer:

e) 31.6 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

Equation of motion

s=ut+\frac{1}{2}at^2\\\Rightarrow s_1=0\times t+\frac{1}{2}\times 0.5\times t^2\\\Rightarrow s_1=\frac{1}{2}0.5t^2\ m

s=ut+\frac{1}{2}at^2\\\Rightarrow s_2=0\times t+\frac{1}{2}\times 0.5\times t^2\\\Rightarrow s_2=\frac{1}{2}1.5t^2\ m

s_1+s_2=1000

\\\Rightarrow 1000=\frac{1}{2}0.5t^2+\frac{1}{2}1.5t^2\\\Rightarrow 1000=\frac{0.5t^2+1.5t^2}{2}\\\Rightarrow 1000=\frac{2t^2}{2}\\\Rightarrow 1000=t^2\\\Rightarrow t=\sqrt{1000}\\\Rightarrow t=31.6\ s

Time taken by the cars to meet 31.6 seconds.

5 0
3 years ago
This diagram is a model of the nitrogen atom.
andrey2020 [161]
C.
Nitrogen has the atomic no. of 7 so the proton and the electron no. is 7.
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The name of the Sl unit for force is the ___?<br><br> A. Joule<br> B. Newton<br> C.Watt
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Answer:

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8 0
2 years ago
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Since rope is parallel to the inclined plane so here we can say that net force parallel to the person which is pulling upwards must counterbalance the component of weight of the person.

Now here we will do the components of the weight of the person

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while the other component of the weight is balanced by the force applied on the rope

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F = 300 N

so it apply 300 N force along the inclined plane

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