The major reason why a wet saw that is used in cutting optical crystals is constantly lubricated with oil is largely due to friction, lubrication decreases friction and minimises the increase of internal energy.
Friction is basically the coming together of two parts that rubs against each other, it causes heat and lead to deterioration of surfaces, it can also lead to wear and tear.
Although, despite it down side, friction is desire-able in most applications
e.g the brake system of vehicles, and if not for friction, we humans cannot walk without falling
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brainly.com/question/24338873
Answer:Velocity
Explanation:
Velocity is directly proportional to the frequency of a wave.
Velocity=frequency x wavelength
Answer:
The ability of humans to see clothing's and other objects depends on diffuse reflection.
Explanation:
Hoped that helped
<u>ANSWER</u>
The correct answer is D. 
<u>EXPLANATION</u>
The question says how far does it go, meaning we want to find the distance covered.
The equation for distance is
where 
is the distance covered
is the speed of the car and
is the time taken.
From the question
and 
We substitute these values into the formula to get,
We carry out the multiplication to obtain,
Therefore the correct answer is D
