An evacuated tube uses an accelerating voltage of 21 kv to accelerate electrons to hit a copper plate and produce x-rays. how much voltage would be required to cause protons to reach the same speed an electron reaches? (we don't worry that the protons would be going in the opposite direction) group of answer choices

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