In a third-class lever, the input force is applied between the fulcrum and the load, and both move in the same direction. The amount of applied force is always greater than the output force of the load, but the load is moved a greater distance than that over which the input force is applied.
Broadcasts are generally used for several reasons: Address Resolution Protocol (ARP) uses broadcasts to map physical addresses to logical addresses. To build the table of hosts, a device needs to send a broadcast to every other device on the network to essentially find out who is where.
How do the heart and blood vessels work? The heart works by following a sequence of electrical signals that cause the muscles in each chamber to contract in a certain order. If these electrical signals change, the heart may not pump as well as it should. The sequence of each heartbeat is as follows: