Type the correct answer in the box. Use numerals instead of words. Frank has a sample of steel that weighs 80 grams. If the dens
1 answer:
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Answer:
The value is
and
Explanation:
From the question we are told that
The image distance is
The focal length is
From the lens equation we have that
=>
=>
Generally the magnification is
=>
=>
Answer:
The crate's coefficient of kinetic friction on the floor is 0.23.
Explanation:
Given that,
Mass of the crate, m = 300 kg
One worker pushes forward on the crate with a force of 390 N while the other pulls in the same direction with a force of 320 N using a rope connected to the crate.
The crate slides with a constant speed. It means that the net force acting on it is 0. Net force acting on it is given by :
So, the crate's coefficient of kinetic friction on the floor is 0.23.