1. A car with a mass of 750Kg moves on flat ground. The friction force of the car is in the opposite direction of the speed and is 200N. A. Calculate the engine power from which the car travels from stationary to accelerated

4m / s in 5s.

B. Calculate the acceleration of the car.

C. Calculate the change in the amount of motion and the collection of kinetic energy.

Please show me explanation​

The coulomb's law explains which of the following? select all the force between two charged objects is inversely proportional to the charge on each object. the force between two charged objects is directly proportional to the charge on each object. the force between two charged objects is directly proportional to the distance separating them. the force between two charged objects is inversely proportional to the square of the distance separat coulomb's law is similar to newton's 2nd law. if the force between two objects is f and the charge on both objects is doubled, the new force between the would now be 2f. if the force between two objects is 2f and the distance separating them is doubled, the new force between the objects would now o the be zf.

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?