2. Which of the following is TRUE about finding the streak of a mineral? a. Minerals should be rubbed on any surface to find the streak. b. The color of the mineral and the streak are the same. The mineral should be rubbed on a streak plate to find the true color of the mineral d. The mineral that has luster has no streak.

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.