In a potentiometer circuit, a 1m long potentiometer wire PQ of resistance 10ohms is connected in series with a cell of e. m.f 9v ,with internal resistance 3ohms calculate a the pd across PQ b. Calculate the e. m.f of a cell which has a balance point of 75cm

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong

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?

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.