You get the net force acting on the object.
R=u^2 sin2x / g
7.8=u^2 sin2*30 /10
u=9.5m/s
I think it is chlorine
protons =17
z= 17
neutron=18
Light always travels in a straight line when going through a single medium, any substance through which a light wave can travel. In some mediums, such as air, light travels quickly. ... Heat, light and sound are similar to each other. They are forms of energy and they travel in waves.