Question

the F1 progeny of Mendels experiment is represented as Tt the plant is phenotypically tall state why it is not TT​

Answer 1

Answer:

because in F1 generation the T is hybrided with t so all the progeny will be Tt only

in F1 there will not be any TT progeny formed

this will form in F2 generation

Answer 2

Given :- v = 20m/sec

u = 0m/sec

t = 5sec

To Find :- The magnitude of retarding force on the vehicle.

Solution :-

Mass of car (m) = 940 kg

Mass of driver (m') = 60 kg

Total mass (M) = (940+60)kg = 1000 kg

By using First law of motion,

$v \: = u \: + at \\ => a = \frac{v - u}{t} \\ a \: = \frac{20 - 0}{5} \\ a \: = \frac{ 20}{5} \\ a \: = 4$

Hence, a = 4m/sec²

Retarding force F = M × a

= 1000 × 4

= 4000N

Hence, the magnitude of retarding force on the vehicle is 4000N.

Hence, option (4) 4000N is correct.