A. compute the torque developed by an industrial motor whose ouputis 150kw at an angular speed of 4000 rev/min.
b. a drum with negligible mass and 0.500m in diameter isattached to the motor shaft, and the power output of the motor isused to raise a weight hanging from a rope wrapped around thedrum. how heavy a weight can the motor lift at constantspeed?
c. at what constant speed will the weight rise?

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j