Grammar and Vocabulary Revision

Rockets … for high altitude research are equipped with special instruments.

The acceleration of all… bodies is the same, independent of their size, shape or mass.

For … electrical energy into mechanical energy we use a special machine.

… the gas increases the speed of the molecules.

A switch is a device for … a gap in a circuit.

The … temperature of water is 100 degrees C.

Rutherford and Soddy worked out a theory… the phenomena of radioactivity.

The meeting will begin as soon as everyone …

They were very dirty because they … football in mud.

If only I … vocabulary thoroughly yesterday.

I insisted that the money … into my account immediately.

Helen… her nails done at present.