Which is not a possible use of lasers?
a. illuminating an object
c. cutting metals
b. pointing at an object
d. surgical procedures

The answer is (a.) illuminating an object
Laser or “light amplification by stimulated emission of radiation” device emits light through a process of optical amplification based on stimulated emission of electromagnetic radiation. It is has been used wielding and cutting of metals. Laser is also applied in medical field where it’s used for surgical procedures. Laser pens are devices that can be use in pointing objects.

Answer: buoyancy forceexplanation: in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.