thể tích của lạc được xác định theo phương pháp thay thế chất khí . hai thùng đo có thể tích bằng nhau 50 cm3.mẫu được cho vào thùng 2 .đầu tiên van 1 mở van 2,3 đóng . không khí được bơm vào thùng 1 cho đến khi áp suất cân bằng là 140 kPa. tiếp đến van 1 đóng mở van 2.cân bằng mới được thiết lập ở áp suất 75 kPa. xác định thể tích của lạc

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

The coulomb's law explains which of the following? select all the force between two charged objects is inversely proportional to the charge on each object. the force between two charged objects is directly proportional to the charge on each object. the force between two charged objects is directly proportional to the distance separating them. the force between two charged objects is inversely proportional to the square of the distance separat coulomb's law is similar to newton's 2nd law. if the force between two objects is f and the charge on both objects is doubled, the new force between the would now be 2f. if the force between two objects is 2f and the distance separating them is doubled, the new force between the objects would now o the be zf.

Which of the following are guidelines to follow for obtaining accurate observations