<span>The relative hardness of a mineral
can be tested by the Moh’s scale or the mineral hardness. The Moh’s scale can
be characterized by the ability of the mineral to resist scratch resistance by
scratching a harder or softer mineral. It has a scale of 1 to 10 where 1 being
the softest and 10 being the hardest. The relative hardness of a mineral can
best be tested by scratching the mineral across a glass plate. The answer is
letter A. </span>
Answer: The velocity magnitude or the velocity direction chages.
Explanation:
According to Newton's second law of motion, the acceleration of a system moved in same direction and is also directly proportional to the external force which acts on it while inversely proportional to the mass. The formula is: a = F/m
Based on the question, since the object obtains acceleration, then it can be infered that there will be changes in the velocity magnitude or the direction as a result of the motion.
Explanation:
Total Internal Reflection (TIR) is a phenomenon in optics, by which light experiences complete reflection at an interface between two media.
In the figure i > © experience total internal reflection
Answer:
OT
It is important to wear protective equipments during games and practices.
Explanation:
Practice is a review of what is about to happen in some time to come and with practice ,the future can be trusted.
During practice it is very important to use protective gears or equipments because without them, injuries and accidents are liable to occur.
During the major game it is also important to prevent accidents or big injuries as the equipments protect each vital part of the body.