) Consider a particle with 4 energy levels E = 0, 1, 2, 3. Each of the energy levels are non-degenerate. Consider a collection of 4 such particles with total energy 3. Draw all

the macro states of the system using an energy level diagram and write down the

number of micro state corresponding to each macro state if

(i) the particles are distinguishable.

(ii) the particles are bosons.

(iii) the particles are fermions​

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

Explain why electric current cannot exist if a current doesn't have a voltage source.