Explanation:
The solute does not have to be in the same physical state as the solvent, but the physical state of the solvent usually determines the state of the solution. As long as the solute and solvent combine to give a homogeneous solution, the solute is said to be soluble in the solvent.
Answer:
4
Explanation:
Refraction is the bending of light when it moves from one medium to another.
In the situation described:
- The average speed of light changes when it goes to another medium. The speed of light in water is less than in air.
- When velocity/speed changes, the index of refraction changes as well. Water's index is greater than in air.
- Since, speed changes, wavelength changes too.
- Only the frequency remains the same. The rates of vibration stays the same.
Correct choice is #4.
Answer:
a) p = 25.8 10⁻¹² C m
, b) The direction of the dipole moment is directed from the negative to the positive charge, c) E = 4.65 10² N/C
Explanation:
a) The dipole moment is
p = 2qa
p = 2 4.30 10⁻⁹ 3.00 10⁻³
p = 25.8 10⁻¹² C m
b) The direction of the dipole moment is directed from the negative to the positive charge, that is, in the opposite direction to the electric field.
c) The torque is
τ = p x E
τ = p E sin θ
E = τ / p sin θ
E = 7.20 10⁻⁹ /(25.8 10⁻¹² sin 36.9)
E = 4.65 10² N/C
We calculate
τ = 15.49 10⁻¹² 4.7 10²
τ = 7.28 10⁻⁹ N m
