Physical Science Final SG

soft drink

oxygen

water

fog

Mg and Cl

N and O

Fe and Co

Rb and Al

LiN

Li3N

LiN3

Li3N3

A The resultant force on the box would be 8 N.

B The resultant force on the box would be 18 N.

C The box will move toward Student X.

D The box will move toward Student Y

A 2S + 3O2 → 2SO3

B 2NaCl → 2Na + Cl2

C 2K + 2H2O → 2KOH + H2

D Zn + 2HCl → ZnCl2 + H2

A when a force is applied to an object and the object remains stationary

B when a force is applied to an object and the object moves in the same direction as the force

C when the frictional force on an object is greater than a force applied to the object

D when two forces of equal magnitude are applied to the object in opposite directions

A HgO → Hg + 2O2

B 2HgO → Hg + O2

C 2HgO → Hg + 2O2

D 2HgO → 2Hg + O2

A The weight and mass will remain the same because they are not altered by the effects of gravity

B The weight will remain the same, but the mass will change because of the effects of gravity

C The mass will be 76.5 kg, and the weight will increase because of the effects of gravity

D The mass will be 750 kg, but the weight will decrease because of the effects of gravity

fluid friction

rolling friction

sliding friction

static friction

6,000

2,700

2.8

0.36