Density = mass divided by volume so if you use that formula Liquid A turns out to be a higher density so it flows slower.
Answer:
1. Golf ball is in the range of only particulate detectable range
2, alpha partcle is in ultraviolet range of wavelength
3.bullet is in xray range of wavelength
All in the EMW spectrum
F = ma
F = force
m = mass
a = acceleration
4.2 m/s = a
70 kg = m
F = ?
F = 4.2*70
F = 294 Newtons
Answer would then be : Force = 294 N