cho rằng lưu lượng chất lỏng thực chay qua một đoạn ống là 20 cm's. nếu tăng gấp đôi bản kinh ống và giảm chiều dài ống còn một nữa chiều dài ban đầu, thi lưu lượng lúc bấy giờ là

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples