Q10. q10. a parallel beam of nitrogen molecules moving with velocity v m/s impinges on a wall at an angle 6to its normal. the concentration of molecules in the

Q10. Q10. A parallel beam of nitrogen molecules moving with velocity v m/s impinges on a wall at an angle 6to its normal. The concentration of molecules in the beam n cm'. The pressure exerted by the beam on the wall assuming the molecules to scatter in accordance with the perfectly elastic collision law is given by (a) 2nmv cos6 (b) nmv cos6 (c) 2nmv sin6 (d) nmv sin6