A 0.9 kg metal bolt is heated to an unknown initial temperature. It is then dropped into a Calorimeter containing 0.15 kg of water with an initial temperature of 31 degrees Celsius. The bolt and the water then reach a final temperature of 37 degrees Celsius. If the metal has a specific heat capacity of 899 J/kgC, find the initial temperature of the metal. Formula: Tm

The velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?

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)

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is