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quantity of heat = mass * Specific latent heat → 20 * 336 quantity of heat = 6720j or 6.72 x 10\(^{3}\)J

The vapor pressure of any substance increases non-linearly with temperature, often described by the Clausius–Clapeyron relation. As the temperature of a liquid or solid increases its vapor pressure also increases. Conversely, vapor pressure decreases as the temperature decreases. i.e. vapor pressure is directly proportional to temperature

A person would weigh six times less on the moon than they do on Earth. OR A person would weigh six times more on the earth than they do on moon. \(\frac{1}{6} of x\) = 6.0N on the moon x = 6 * 6 = 36

The electric field at the surface of the conductor is perpendicular to the surface. Charge accumulates, and the field is strongest, on pointy parts of the conductor.

When it is cut into two, the two cut pieces will have their own north and south poles.

If both the coil and the magnet are stationary, then there is no change in the magnetic flux and hence no current is induced in the coil.

Relays are electrically operated switches that open and close the circuits by receiving electrical signals from outside sources.

the magnetic flux through a surface is the surface integral of the normal component of the magnetic field B over that surface. It is usually denoted Φ or ΦB. The SI unit of magnetic flux is the weber Mathematically it is represented as B = Φ/A where B is magnetic flux density in teslas (T), Φ is magnetic flux in webers (Wb), and A is area in square meters (m2).

Therefore, as the area of the plates increase, capacitance increases.

If the zinc used in the simple cell is of the impure commercial variety bubbles of hydrogen will be seen coming off the zinc. This is called local action.

Lost voltage = I x R = 4 x 0.55 = 2.2V

Distilled water is free of salts and is a poor conductor of electricity.

Energy = power x time Power = voltage x current. Energy = voltage x current x time Energy = 40 x 0.5 x 60 x 2 → 2,400j

It's generally created using silicon, germanium, or other pure elements. Semiconductors are created by adding impurities to the element. The conductance or inductance of the element depends on the type and intensity of the added impurities. The electrons surrounding each atom in a semiconductor are part of a covalent bond

The equation that establishes a relationship between the amount left undecayed, A, the initial amount, A0, and the number of half-lives that pass in a period of time t looks like this: \(\frac{1}{2^n} * A_0 = A\) \(\frac{1}{2^n} * 120 = 15\) \(\frac{1}{2^n}\) = \(\frac{15}{120}\) \(\frac{1}{2^n}\) = \(\frac{1}{8}\) \(\frac{1}{2^n}\) = \(\frac{1}{2^3}\) \(2^n = 2^3\) n = 3 :6days \div 3 = 2days