Temperature, light intensity, air currents, and humidity are some of these factors. Different plants also vary in the rate of transpiration and in the regulation of stomatal opening. In this lab, you will measure transpiration under various laboratory conditions using a potometer.ater will then move into the mesophyll cells by osmosis from surrounding cells with high water potentials, including the xylem. As each water molecule moves into a mesophyll cell, it exerts a pull on the column of water molecules existing in the xylem all the way from the leaves to the roots.
A starter solenoid (or starter relay) is the part of an automobile which switches a large electric current to the starter motor, in response to a small control current, and which in turn sets the engine in motion.hen low-current power from the starting battery is applied to the starter solenoid, usually through a key-operated switch, the solenoid closes high-current contacts for the starter motor and it starts to run.
A starter is an electric motor that turns over or cranks the engine to start it. It consists of a powerful DC (Direct Current) electric motor and the starter solenoid that is attached to the motor (see the picture).The starter motor is powered by the car battery.To turn over the engine the starter motor requires a very high electric current, which means the battery has to have sufficient power. Starting system problems are common and not all problems are caused by a faulty starter motor.o turn over the engine the starter motor requires a very high electric current, which means the battery has to have sufficient power. Starting system problems are common and not all problems are caused by a faulty starter motor.