Need only answer if you think you know it

What equation is used to calculate the weight of an object on a plant ?

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy. work depends on the square of the change in potential energy. work is equal to the negative of the change in kinetic energy. work is equal to the square of the change in kinetic energy

Which component of the earth’s atmosphere is decreased due to photosynthesis?