ENRICHMENT TEST OF PHYSICS1

1. The density of a metal is 5800 kg/m3. If the mass of the metal is 2900 kg, then the volume of the metal is…
a. 0,2 m3
b. 0,5 m3
c. 1 m3
d. 2 m3

2. The characteristics of matter are…
(1) Particles are not idle, they always vibrate
(2) There are attractive forces between particles
(3) Particles are visible
The correct statement are……
a. (1), (2), and (3)
b. (1) and (2)
c. (1) and (3)
d. (2) and (3)

3. 100 ml liquid has mass 100 gr. The density of liquid is …….
a. 0,5 g/cm3 c. 1,5 g/cm3
b. 1 g/cm3 d. 5,4 g/cm3

4. The water surface in a glass tube has concave in shape. The happens because ……
a. the adhesion of water and the glass tube < water cohesion
b. the adhesion of water and the glass tube > water cohesion
c. the cohesion of water and glass tube < water adhesion
d. the cohesion of water and glass tube > water adhesion

5. A bar of iron has length 1 meters at temperature of 30 0C. If its expansion coefficient 0.000012 / 0C, the length of the iron at temperature of 50 0C is ….
a. 0.100024 m c. 24.00025 m
b. 1.000240 m d. 1.24000 m

6. Evaporation of solid without passing trough liquid called ……
a. Sublimation
b. Condensation
c. Melting
d. Evaporation

7. The transfer of heat through a heat conductor with a flow of the medium’s material is called……..
a. conduction c. convection
b. radiation d. heat flow

8. An ice which has a mass 2 kg is heated from -20oC to 0oC . If the specific heat of ice is 2100 J/kg oC, then the energy required to change its temperature ……..
a. 210 J
b. 8400 J
c. -84000 J
d. 84000 J

9. Mercury has vapor heat of 272.000 J/Kg. If the mass of mercury is 200 gr, the heat required to vapor is……..
a. 54.400.000 joule
b. 544.000 joule
c. 54.400 joule
d. 544 joule