Physics
The instrument that measures and records the relative humidity of air is

Hygrometer
Barometer
Hydrometer
Lactometer

ANSWER DOWNLOAD EXAMIANS APP

Physics
Isotopes of an element contain

equal number of nucleons
the same number of protons but different number of neutrons
the same number of neutrons but different number of protons
equal number of protons and electrons

ANSWER DOWNLOAD EXAMIANS APP