the top of early get frozen at place where the surrounding air is at a temperature of minus 20 degrees celsius what will be the temperature of the layer of water in contact with the lower surface of an ice block and at the bottom of the lake​

Blood pressure the total amount of blood the heart pumps in one minute 2. cardiac output the number of times your heart beats in a minute 3. dilate the amount of blood that the heart can pump in a single beat 4. heart rate the force exerted on the walls of the blood vessels by the blood that moves through them 5. stroke volume to widen or get larger in size