Compared to the crankshaft what speed does the camshaft turn?

The camshaft typically turns at half the speed of the crankshaft in a four-stroke engine. This is because the camshaft is driven by the crankshaft and needs to rotate once for every two rotations of the crankshaft to synchronize the opening and closing of the engine's valves. This ratio ensures that the intake and exhaust valves operate at the correct times during the engine's cycle.