Answer:D) Egocentrism
Explanation:
Mr.Tong should be alerted to Piaget's concept of Egocentrism which is under the pre operational stage of Piaget's theory.
Following are the key features of Pre operational stage
- Centration
- Egocentrism
- Play
- Symbolic Representation
- Pretend (or symbolic) Play
- Animism
- Artificialism
- Irreversibility
The feelings and actions of children are usually self-centered. Egocentrism refers to the failure of the child to see a situation from another person Perception.
The self-centered child believes that other people see, hear, and feel exactly the same as the child does, according to Piaget.
Here Also 5 year old daughter does not think about her father and ask question blatantly
Answer:
A
Explanation:
paddling a canoe to make the boat move
Answer:
9.3 g/cm³
Explanation:
First, convert kg to g:
0.485 kg × (1000 g / kg) = 485 g
Density is mass divided by volume:
D = (485 g) / (52 cm³)
D = 9.33 g/cm³
Rounding to two significant figures, the density is 9.3 g/cm³.
The boiling point of ethanol is at 78.37°C. So, the energy must include sensible heat to raise 19°C to the boiling point and latent heat to change liquid to gas. The equation would be
Energy = Sensible heat + Latent heat
Energy = mCpΔT + mΔH
For ethanol,
Cp = 46.068 + 102,460T - 139.63T² - 0.030341T³ + 0.0020386T⁴ J/kmol·K
ΔH = 38,560 J/mol
Integrate the Cp expression to determine CpΔT:
CpΔT = ∫₂₉₂³⁵²(46.068 + 102,460T - 139.63T² - 0.030341T³ + 0.0020386T⁴ )dT
The upper limit is (78.37+273) = 352 K, while the lower limit is (19 + 273) = 292.
CpΔT = 2384857192 J/kmol·K
2,000 J = m(2384857192 J/kmol)(1 kmol/1000 mol) + m(38,560 J/mol)
m = 8.253×10⁻⁴ moles of ethanol
Since the molar mass of ethanol is 46.07 g/mol,
Mass = (8.253×10⁻⁴ mol)(46.07 g/mol)
Mass = 0.038 g ethanol
