Một con lắc lò xo đặt nằm ngang gồm lò xo có độ cứng 10N/m và vật có khối lượng 100g. Kích thích cho con lắc dao động điều hòa . Xác định độ lớn của lực đàn hồi khi vật cách vị trí cân bằng một đoạn 2cm. L ấy g=10m/s2.

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.

statement #3 on andre"s list is false.

b. a lightning bug, plug of grass, and a worm