According to the law of conservation of mass the total mass of the reacting substances is

What is the measurement of how fast an object moves relative to a reference point?

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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