Mắc nối tiếp một bóng đèn 9V–3W với một biến trở R
vào hai cực của acquy
12V–3Ω. Cần phải điều
chỉnh R bằng bao nhiêu để
đèn sáng bình thường?

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work