I am teaching or have taught AP physics B and C [calculus based mechanics & electricity and magnetism] as well as Lab Physics for college bound students. I have a BS in Physics from the University of Pittsburgh and a Master of Arts in Teaching from same. I have been teaching physics for 34 years. I am constantly updating my skills and have a particular interest in modern physics topics.
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If 30% of the heat is dumped into the cold reservoir the efficiency of the process is 70% rather than 30%. In any case the ideal efficiency is given by: Eff=[Thot-Tcold]/Thot Which in this case becomes:
The energy of the incoming proton is converted into the mass of the resulting products. Mass is NOT conserved! What is conserved is mass-energy where mass and energy are different aspects of the same fundamental
Question 1 is a relative velocity question. Just add the velocity of you to the velocity of the bus! Question 2 is a Newton's 2nd Law problem where the net force F acting on an object is responsible for
All 2 dimensional kinematics problems can be solved in the same way. There are 6 kinematics variables: Do, Df, Vo,Vf, a and t. Along with these 6 variables there are 2 available equations: Df=1/2*a*t^2+Vo*T+Do
a) To determine the velocity of someone at the equator use the definition of velocity: v=dD/dT where dD is the distance moved and dT is the time passed. In the case of the Earth rotating the distance
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