What is the company Mèrieux nutrisciences in Canada? What does this company do?

Grade 9 science electricity

1. If a light bulb uses 50 J of electrical energy and produces 10 J of light energy, what is the percent efficiency of the light bulb? Show your work! (2 marks = 1 mark for correct formula; 1 mark for answer)

2. Mr. Zajac’s T.V. has a power rating of 200 Watts. During the month of May (31 days), Mr. Zajac watched T.V. for 2 hours per day. The power-supply company charges 8 ¢/kW•h. How much money does Mr. Zajac have to pay the electrical company for his T.V. related energy consumption? Please show your answer in dollars. Show your work! (4 marks)

Abstract sciences. 

what is the difference between discovery science and hypothesis-driven science?