A. Tachometer
B. Hydrometer
C. Hygrometer
D. Galvanometer
A. Lonometer
B. Spectrometer
C. Manometer
D. Stereoscope
A. 7.6 minutes
B. 8.5 minutes
C. 8.8 minutes
D. 9.2 minutes
A. Helium, Neon and Argon
B. Nitrogen, Argon and Neon
C. Argon, Helium and Hydrogen
D. Helium, Neon and Carbon dioxide
A. Common salt
B. Plaster of Paris
C. Gypsum
D. Washing soda