Which is NOT true about oxygen-17 and oxygen-18?
1 answer:
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The acceleration of the car is 0.8049.It takes 13.802s to travel the 230 m.
<h3>What is acceleration?</h3>
In mechanics, acceleration refers to the rate at which an object's velocity with respect to time varies. Acceleration is a vector quantity (in that they have magnitude and direction). The direction of an object's acceleration is determined by the direction of the net force acting on it. Newton's Second Law states that the combined effect of two factors determines how much an item accelerates:
(i) It follows that the magnitude of the net balance of all external forces acting on the object is directly proportional to the magnitude of this net resulting force, and
(ii) the mass of the thing, depending on the materials out of which it is constructed, is inversely proportional to the mass of the thing.
Calculations:
40 km/hr ----- 11.11m/s
80 km/hr ----- 22.22m/s
Time taken
v-u=at
22.22-11.11= 0.8049 x t
t=13.802s
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The image is at 2.5 m behind the mirror (virtual image)
Explanation:
We can solve the problem by using the mirror equation:
where
f is the focal length of the mirror
is the distance between the object and the mirror
is the distance between the image and the mirror
For a plane mirror, the focal length is infinite:
And in this problem, the distance of the object from the mirror is
Substituting and solving for , we find the location of the image:
And the negative sign means that the image is located behind the mirror, so it is virtual.
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