A) 17.9 cm
We have:
is the focal length of the mirror (for concave mirror, the focal length is positive)
is the distance between the object and the mirror
is the distance between the image and the mirror
We can then use the mirror equation to find q:
B) -5.0 cm
The height of the image can be determined by using the magnification equation:
where
is the heigth of the image
is the height of the object
Substituting and re-arranging the formula, we find
And the negative sign means the image is inverted.
Answer:
Explanation:
Given
mass of boy
mass of girl
speed of girl after push
Suppose speed of boy after push is
initially momentum of system is zero so final momentum is also zero because momentum is conserved
i.e. velocity of boy is 2.82 m/s towards west
Answer:
If the particle is an electron
If the particle is a proton,
Explanation:
Initial speed at the origin,
to +ve x-axis
The particle crosses the x-axis at , x = 1.5 cm = 0.015 m
The particle can either be an electron or a proton:
Mass of an electron,
Mass of a proton,
The electric field intensity along the positive y axis , can be given by the formula:
If the particle is an electron:
If the particle is a proton:
Option (D) is correct that all of the above are physical properties of non metals.
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