For questions like this there are only a couple of possible equations you need to look at :)
In this case the equation for Kinetic energy (energy of motion) is:
Simply plug in the mass and velocity variable given in the question and you have your answer :)
You can calculate the speed of the ball by the distance it travels divided by the time.
Length of string = 2m
Circumference of circle = 2*radius*π = 4*pi = ~12.6 meters
Speed = distance/time = 12.6m/2s = 6.28m/s
Acceleration = V²/R where the velocity at any one point is the same as the speed.
acceleration = (6.28)²/2 = ~19.72m/s²
Ozone gas is made up of oxygen molecules that have three atoms. it exists in polluted air and ozone layer. Ozone layer is formed in stratosphere(part of atmosphere).
As a non-metal, since it's a gas
Work+Force*Distance. Rearranging, F=W/d. Calculating, the force must be 0.0215 N.