Ahockey puck with a mass of 0.35 kg slides across the ice after a slap shot toward the goal. if the puck decelerates at 7.8 m/s/s, what is the coefficient of friction between the ice and the puck?

The sliding friction is the net force acting on puck in horizontal direction,
Therefore, from Newton's 2nd law of motion,
f = ma 
f = sliding frictional force = μmg 
μ =coefficient of sliding friction, m = mass of puck, a = deceleration = 7.8 m/s²
∴ μmg = ma
∴ μ = a/g = 7.8/9.8 = 0.795
Therefore, the coefficient of friction is 0.795

Ibelieve the correct answer would be c.

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.