Problem 4 (20 points): The power absorbed by an element is equal to the product of the voltage across it and the current passing through it (in the direction from high to low potential), i. e. P = V × . For a resistor, this value is always positive (implying that the resistor "absorbs" power). The value will be negative if an element "delivers" power (which is usually but not always the case for a power source). In the following circuits, state whether the 5V power source is "absorbing power from" or "delivering power to" the circuit. Find this power.

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules

Can anybody me with this? ? (picture included.)

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?