Man-made Materials — Science STD 8 — Question

1 ampere = 1 coulomb per …………… .

Except hydrogen, the nuclei of all atoms contain ………….. .

When all the components of a mixture form one phase, it is called ………….. .

Combustion of fuel is a ………… and ……………. chemical change.

Electrons revolve around the …………….. in certain discrete orbits.

Keeping the surface area constant, if the applied force is doubled, the pressure …………….. .
(becomes double, remains the same, becomes four times, becomes half)

Fill in the blanks with suitable words:The bacteria cells are _______ to _______ micrometer in length.

The SI unit of force is the ………..
(dyne, newton, joule)

Fill in the following blanks with suitable words:
Friction produces ____________________.

Fill in the following blanks with suitable words:
Metals react with acids to produce _______ gas.