Question

8. Assertion : Friction depends on how hard the two surfaces press against each other.
Reason : When a body slides over a smooth surface, the amount of interlocking of
irregularities of the two surfaces in contact, increases.​

Answer 1

Answer:

it is claimed by a racer bike manufacturing company that the race bikes are driven on a average of more than 12,000 kilometres on yearly basis .To the test the company's claim 100 randomly drawn racer bike owners are asked to maintain a record of total distance they travel. Will you favour this companys claim if the randomly selected sample exibit an average of 13,200 kilometres and a standard deviation of 3900 kilometres? Use P value to conclude your answervwith 5% level of significance

what what what

Explanation:

goooooooooooooooooooooooosjfjgjnsvscsf

Answer 2

Answer:

it is correct answer . .....