Một cái tách nặng 200g đặt tại mép bàn xoay có bán kính 0,9m, giả sử hệ số ma sát giữa ly và bàn là 0,15. Ta quay bàn với vận tốc góc bao nhiêu để ly không bị đổ?

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

If y gets smaller as x gets bigger and y have an relationship?

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.