Rich leaves home each day at 7:00 am and bikes 10 miles to work at 12 miles per hour (mph). Each day he passes the police station at 7:25 am. One day Rich left home later than usual and passed the police station at 7:38 am. At what speed would he have to travel the rest of the way to get to work at the same time as usual

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)

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Which of the choices are parts of an atom? select all that apply. a.) compound b.) electron c.) neutron d.) molecule e.) photon f.) proton g.) element