Let's start by using the mirror equation:

where f=10 cm is the focal lenght of the mirror, d=38 cm is the distance of the object from the mirror, while q is the distance of the image from the mirror.
For the sign convention, f is taken as positive for a concave mirror. Therefore, we can solve the equation for q:

from which we find q=13.6 cm.
The fact that q is positive means that the image is
real, so it is on the same side of the object, with respect to the mirror.
Then we can also find the size of the image with respect to the original object. The magnification is given by

The negative sign means that the image is
inverted, and the size of the image is 0.36 times the size of the object.
Yeah oppp because this is yes
Answer: The correct answer is a.
Explanation:
Electromagnetic wave is a wave in which the magnetic field and the electric field are perpendicular to each other.
Both fields are directed in the direction of the propagation of the electromagnetic wave. It travels with the speed of the light.
The motion of the electric field produces both electric field and the magnetic field.
The electromagnetic waves are produced when an electric charge vibrates or accelerates.
Therefore, the correct option is (a).
Answer:
and 
Explanation:
The tub rotates at constant speed and the kinematic formula to describe the change in angular displacement (
), measured in radians, is:

Where:
- Steady angular speed, measured in radians per second.
- Time, measured in seconds.
If
and
, then:


The change in angular displacement, measured in revolutions, is given by the following expression:


Answer:
Number of electrons, n = 395.47
Explanation:
It is given that,
Force between two spheres, 
Distance between spheres, r = 35 cm = 0.35 m
A force of repulsion is acting on the spheres. It is given by :





Let n is the number of electrons on the spheres. So,
q = n e


n = 395.47
So, the the number of excess electrons on the spheres are 395.47. Hence, this is the required solution.