A given object taken double time to slide down a `45^(@)` rough incline as it takes to slide down a perfectly smooth `45^(@)` incline. The coefficient

Correct option is D) 160

`t=(2.303)/k log a/(a-x)` `t_(99%) = (2.303)/k log (100)/1=2.303/k xx 2 = 4.606/k` `t_(90%) = (2.303)/k log 100/10 = 2.303/k xx 1=2.303/k` `t_(99%)/t_(90%)=4.606/2.303 = 2`.

Smooth endoplasmic reticulum (SER):  1. Depending on cell type, it helps in synthesis of lipids for e.g. Steroid secreting cells of cortical region of adrenal gland, testes and ovaries.  2. Smooth endoplasmic...

Correct Answer - C `v^(2) == u^(2) + 2 as` `0^(2) = u^(2) + 2(-mug)s` `s = (u^(2))/(2mug)`

Correct Answer - C `T = (2u_(y))/(a_(y)) = 4` `H = (u_(y)^(2))/(2a_(y)) = 5` `(T)/(H) = (4)/(u_(y)) = (4)/(5)` `u_(y) = 5` `u_(x) = 10` (given) `u = sqrt(10^(2) + 5^(2))...

`T = ("Total time")/("Total oscillation") = (t)/(10)` `rArr DeltaT = (Deltat)/(10) = (0.1)/(10)` `DeltaT = 0.01` second .

Option : (c) neutral or positively charged

`t_(1)=(AB)/(v_(b)+v_(R)) . T_(2)=(AB)/(v_(b)-v_(R))` or `v_(b)+v_(R)=(AB)/(t_(1))` and `v_(b)-v_(R)=(AB)/(t_(2))rArr 2v_(b)=(AB)/(t_(1)+(AB)/(t_(2)))=AB((t_(1)+t_(2))/(t_(1)t_(2)))` or `((2t_(1)t_(2))/(t_(1)+t_(2)))=(AB)/(v_(b))`= time taken by the boat to cover AB

Correct Answer - C `(8)/(v_(mr))+(8)/(v_(mr))=2` `rArr v_(mr)=8 km//hr`. `rArrt=(8)/(v_(mr)+v_(r))+(8)/(v_(mr)-v_(r))` `rArr t=8(v_(mr)-v_(r)+v_(mr)+v_(r))/(v_(mr)^(2)-v_(r)^(2))=(16v_(mr))/(v_(mr)^(2)-v_(r)^(2))` `=(16xx8)/(64-16)=(16xx8)/(48) hr=(8)/(3)xx60=160` min.

`t_(1)=sqrt((2d)/(g sin45^(@)))=sqrt((2d)/((g)/sqrt(2)))` `t_(2)=sqrt((2d)/(((g)/(sqrt(2))-mu(g)/(sqrt(2))))` `t_(2)=nt_(1)` `sqrt((2d)/(((g)/(sqrt(2))-mu(g)/(sqrt(2)))))=nsqrt((2d)/((g)/(sqrt(2))))` `(1)/(sqrt(1-mu))=n` `(1)/(1-mu)=n^(2)` `1 = n^(2)-n^(2)mu` `(1)/(n^(2))=-1-mu` `mu=(1-(1)/(n^(2)))`