CAN SOMEONE HELP... IT'S DUE ON MONDAY...AND I NEED HELP. THERE'S THREE DIFFERENT QUESTION EACH PAGE AND THERE ALL DUE!!!

What are similarities and differences of reflection, refraction, diffraction and absorption?

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )