Adisk rotates around an axis through its center that is perpendicular to the plane of the disk. the disk has a line drawn on it that extends from the axis of the disk to the rim. at t = 0 this line lies along the x-axis and the disk is rotating with positive angular velocity ω0z. the disk has constant positive angular acceleration αz. at what time after t = 0 has the line on the disk rotated through an angle θ?

express your answer in terms of the variables ω0z, αz, and θ.

Which of the following correctly describes the early view of catastrophism?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

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)