the plates of a cell are connected to a 4ohms resistor and a potential difference measured across them using a potentiometer is 1.6V. If the 4ohms resistance is replaced by a 3ohms resistance and the potential difference is 1.5V, find the EMF and internal resistance of the cell.​

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

What are similarities and differences of reflection, refraction, diffraction and absorption?

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b