Aramp 20 m long and 4 m high is used to lift a heavy box. a pulley system with 4 rope sections supporting the load is used to lift an identical box to a height of 4 m. if friction is ignored, the ramp requires a to lift the load.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation: