A car is moving in a foured direction with the speed of 40 knlph it changes the speed into 80km/h within aminted the acceleration
of the car.

Three point charges, two positive and one negative, each having a magnitude of 20 μc are placed at the vertices of an equilateral triangle (30 cm on a side). what is the magnitude of the electrostatic force on the negative charge

Describe the path of a ray that approaches a mirror parallel to the principal axis.

The law of conservation of energy states that energy cannot be created or , energy can be from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '