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Answer:
a) 855.41J
b) 855.41J
Explanation:
The force equation is
N - mg - F sinθ = 0
N = mg + F sinθ
The frictonal force is =


substitute the value of the normal force in the above equation


= 151.96N
a) work done = F × d
= (151.96) × (6.5) cos30°
= 855.41 J
b) The increase in thermal energy of the block floor system will be equal to the work done by the worker
work done = F × d
= (151.96) × (6.5) cos30°
= 855.41 J
In physical chemistry, the mean free path is the average distance between the atoms during collision. Its formula is

where d is the diameter of the Nitrogen atom (d = 310 x 10^-7 m), Na is Avogadro's number (Na=6.022 x 10^23), R is the gas constant (8.314 J/mol-K), T is the absolute temperature (T= 20 + 273 = 293 K). Substituting the values,
P = 6.32 x 10^-13 Pascals
Answer is A. They converge at the focal point
Answer:
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