In series, R_eq = R1 + R2 = 4Ω + 4Ω = 8Ω.

For parallel resistors, 1/R_eq = 1/R1 + 1/R2 = 1/4 + 1/6. Finding a common denominator gives R_eq = 2.4Ω.

The unit of electric charge is Coulomb (C).

The SI unit of work is Joule (J).

Using Ohm's law, V = IR = 3A * 10Ω = 30V.

Using Ohm's law, V = IR = 1.5A * 12Ω = 18V.

Using Ohm's law, V = IR = 3A * 12Ω = 36V.

Using Ohm's law, V = IR = 3A * 5Ω = 15V.

Using Ohm's law, V = IR = 3A * 5Ω = 15V.

Work = F × d × cos(θ) = 15 N × 4 m × cos(60°) = 15 × 4 × 0.5 = 30 J.

Work done (W) = P * ΔV = 3 atm * (5 L - 2 L) = 3 atm * 3 L = 9 atm·L = 15 J (1 atm·L = 101.325 J)

Work done (W) = P * ΔV = 2 atm * (2 L - 4 L) = 2 atm * (-2 L) = -4 L·atm (work done on the gas is positive).

Work done (W) = P * ΔV = 200 kPa * (2 L - 5 L) = 200 kPa * (-3 L) = -600 J (work done on the gas).

Work done W = nRT ln(Vf/Vi) = 1 * 8.314 * 300 * ln(20/10) = 600 J.

Work done = nRT ln(Vf/Vi) = 1 mol × 8.31 J/mol·K × 300 K × ln(20/10) = 1660 J.

Work done (W) = F × d = 50 N × 3 m = 150 J.

Work done (W) = Force × Distance = 10 N × 5 m = 50 J.

Work = Force * Distance * cos(θ) = 15 N * 3 m * cos(0°) = 45 J.

Work done = Force × Distance = 15 N × 4 m = 60 J

Ampere's Law relates the magnetic field around a conductor to the current flowing through it.

The Conservation of Momentum states that in a closed system, the total momentum remains constant if no external forces act on it.

Length is a base quantity in the SI system, while force, energy, and pressure are derived quantities.

Meter is a base unit in the SI system, while liter, newton, and joule are derived units.

Acceleration is defined as the change in velocity per unit time, so its dimensional formula is [M^0 L^1 T^-2].

Energy has the dimensional formula [M^1 L^2 T^-2], as it is defined as work done, which is force times distance.

Frequency has the dimensional formula [M^0 L^0 T^-1].

The unit of pressure is Pascal (Pa), which is equivalent to N/m².

The law of conservation of energy states that energy cannot be created or destroyed, but it can be transformed from one form to another.

Iron is a ferromagnetic material, which means it can be magnetized and has a high magnetic permeability.

Iron is considered a ferromagnetic material, which can be magnetized and retains its magnetism.