A student uses an electric motor to lift a load In the motor, the electrical energy is transferred into other types of energy. Some of this
energy is useful and the rest of the energy is wasted
(a) (0) Name the useful energy output from the electric motor
(1)

Helium decays to form lithium. which equation correctly describes this decay?

Achemical reaction is done in the setup shown , resulting in a change of mass. what will happen if the same reaction is done in a sealed container that is placed on the electronic balance?

Examine the false statement. compounds are the smallest unit of an element that occur most commonly in nature. select the rewording of the statement that is true. a: atoms are the smallest unit of an element that commonly occur in nature. b: molecules are the smallest unit of an element or compound that commonly occur in nature. c: molecules are the smallest unit of a compound that occur on the periodic table. d: compounds are the smallest unit of an element that occur on the periodic table