Write a balanced formula equation for the following reaction.magnesium + hydrogen chloride magnesium chloride + hydrogen

Which of the following statements about heat transfer is MOST accurate?

A. Heat moves from cooler objects to those that are warmer. B. The transfer of heat from object to object is measured as energy flow over time. C. For heat to be transferred from one object to another, they must be at the same temperature. D. The greater the temperature difference between two substances, the slower the transfer rate.

Mr. Gorp has a pacemaker that senses atrial and ventricular depolarizations and paces the atrium and ventricle. It can be inhibited or triggered by sensed events. What kind of pacemaker is this?

A) DDD B) DOO C) DVI D) VVI