CAPACITY, the ability to contain a definite quantity. Cu bical capacity is measured in units of volume. Electrical capacity is denoted by the charge Q (see ELECTRICITY) which a system can hold on the application of a given voltage V, and is given by the Q V. CONDENSER; BROADCASTING : Technical As V pects; TELEGRAPH ; WIRELESS TELEGRAPHY.) Thermal capacity measures the capability of a body for absorbing heat (q.v.), and numerically is the product of its specific heat and its density.