Mechanical energy is equal to
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Which of the following has the same unit as energy?
The centre of the reflecting surface of a spherical mirror is called the
In a concave mirror when the object is placed at infinity which of the following applies to the image?
The speed of light in vacuum is estimated as ___ meters/second.
Which of the following Newton's laws of motion can explain why a ball thrown at a wall rebounds?
In a longitudinal wave, the distance between two consecutive compressions and two consecutive refractions is called
A charge of 2 C passes from one point to the other in a circuit. If the potential difference between the two points is 5 V, the amount of work done is