Resultado: 4 9. Calcule la magnitud de la carga máxima
que se le puede aplicar a un
alambre
de acero templado de 1.8 cm de diametro
para no rebasar su limite elástico;
determine también el alargamiento que sufrirá
Si se le aplica la carga máxima calculada y
tiene una longitud inicial de 1.2m.

The magnitude of the maximum load that can be applied to the wire is approximately  381703.51 N

The elongation to a 1.2 m length of the wire at the maximum load is approximately 8.696 mm

Explanation:

Result: 4

Calculate the magnitude of the maximum load

that can be applied to a

wire

made of tempered steel 1.8 cm in diameter

so as not to exceed its elastic limit;

also determine the elongation that will suffer

If the calculated maximum load is applied and

It has an initial length of 1.2m.

The given information are;

The diameter, D, of the tempered steel wire = 1.8 cm = 0.018 m

The initial length of the wire = 1.2 m

The cross-sectional area of the wire = π × D²/4 = π × (0.018)²/4 = 0.000254469 m²

When we take the yield strength for tempered steel as 1500 MPa, we have;

Therefore;

F = (Yield strength) × (Original cross-sectional area)

F = 1,500 MPa × 0.000254469 m² ≈ 381703.51 N.

The magnitude of the maximum load that can be applied to the wire =  381703.51 N

2. We have the modulus of elasticity, E = 207 GPa

∴ E = Yield strength/(Elastic strength)

Elastic strength = Yield strength/(E) = 1500 MPa/207 GPa ≈ 7.25×10⁻³

Elastic strength = Δl/l = (Change in length)/(Original length)

∴ 7.25×10⁻³ = Δl/1.2

Δl = 1.2 × 7.25×10⁻³ ≈ 8.696×10⁻³ m = 8.696 mm

The elongation to a 1.2 m length of the wire at the maximum load ≈ 8.696 mm.

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.

c) up

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