A closed‑circular dna molecule of 5000 bp has a linking number (lk) of approximately 500 when it is in its relaxed form. Identify how each condition will alter the linking number.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

When solid surfaces slide over each other the kind of friction that occurs is called friction

Afaulty model rocket moves in the xy-plane (the positive y direction is vertically upward). the rocket's acceleration has components ax(t) = ? t2 and ay(t) = ? ? ? t, where ? = 2.50 m/s4 , ? = 9.00 m/s2 , and ? = 1.40 m/s3 . at t = 0 the rocket is at the origin and has velocity ~v0 = v0x ? i + v0y ? j with v0x = 1.00 m/s and v0y = 7.00 m/s. (a) calculate the velocity and position vectors as functions of time. (b) what is the maximum height reached by the rocket? (c) sketch the path of the rocket. (d) what is the horizontal displacement of the rocket when it returns to y = 0?