The emf and the internal resistance of a battery are as shown in the figure. If a current of 5 a is drawn from the battery when a resistor r is connected across the terminals a and b of the battery, what is the voltage drop across the resistor r?.

Why don't you see your reflection in water with waves or repples

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

The dot diagram represents the motion of the motorcycle as it moves from left to right