The repeating unit in polyethylene is -CH2-CH2-, derived from ethylene monomers.

Resistivity ρ = R * (A / L) = 10 * (1 x 10^-6 / 5) = 2 x 10^-5 Ω·m.

Resistivity (ρ) = R * (A / L) = 4 * (1 x 10^-6 / 2) = 4 x 10^-6 Ω·m.

When subtracting, the result should be rounded to the least number of decimal places. 5.00 has two decimal places and 2.1 has one, so the result should be rounded to one decimal place: 5.00 - 2.1 = 2.90 becomes 2.9.

6.022 rounded to 3 significant figures is 6.02.

6.022 rounded to three significant figures is 6.02 × 10^23.

The result should be rounded to one decimal place, giving 12.4.

When adding, the result should be rounded to the least number of decimal places. 12.11 has two decimal places and 0.3 has one, so the result should be rounded to one decimal place: 12.41 becomes 12.4.

Destructive interference occurs when two waves of equal amplitude meet out of phase, resulting in an amplitude of zero.

In division, the result should have the same number of significant figures as the measurement with the least significant figures. 100.0 has 4 significant figures and 4.00 has 3 significant figures, so the answer should be 25.0 with 3 significant figures.

150.0 has four significant figures and 3.00 has three significant figures. The result should be reported with three significant figures: 50.0.

In division, the result should have the same number of significant figures as the measurement with the least significant figures. 6.38 has 3 significant figures and 2.0 has 2 significant figures, so the answer should be rounded to 2 significant figures: 3.19 becomes 3.2.

In division, the result should have the same number of significant figures as the measurement with the least significant figures. 8.0 has 2 significant figures and 2.00 has 3 significant figures, so the answer should be 4.0 (2 significant figures).

When two waves of equal amplitude and opposite phase meet, they cancel each other out, resulting in destructive interference.

When two waves of equal amplitude and opposite phase combine, they cancel each other out, resulting in destructive interference.

When light passes through a polarizer and then an analyzer at 90 degrees, no light passes through due to the orthogonal orientation.

In multiplication, the result should have the same number of significant figures as the factor with the least significant figures. 6.02 x 10^23 has 3 significant figures and 3.0 has 2, so the answer should be 1.8 x 10^24.

In subtraction, the result should be rounded to the least number of decimal places. 10.0 has one decimal place and 5.00 has two, so the result should be rounded to one decimal place: 5.0.

In subtraction, the result should be rounded to the least number of decimal places. 10.0 has one decimal place and 5.678 has three, so the result should be rounded to one decimal place: 4.32 becomes 4.3.

Resultant = (2 + (-1), 3 + 4) = (1, 7).

Resultant = (1 - 1, 2 - 2) = (0, 0)

The right-hand rule helps determine the direction of current, magnetic field, and force on a charge in magnetic fields.

The RMS speed is given by the formula v_rms = sqrt(3RT/M).

Using v_rms = sqrt(3RT/M), we find v_rms = sqrt(3 * 8.314 * 273 / 0.032) which is approximately 400 m/s.

The RMS speed (v_rms) of an ideal gas is given by the formula v_rms = sqrt((3RT)/M), where R is the universal gas constant, T is the absolute temperature, and M is the molar mass.

The RMS speed (v_rms) of an ideal gas is given by the formula v_rms = sqrt((3RT)/M), where R is the universal gas constant, T is the temperature in Kelvin, and M is the molar mass.

The RMS value of an AC voltage is given by V_rms = V0/√2.

A catalyst speeds up the reaction without being consumed in the process.

The commutator in a DC motor reverses the direction of current in the coil every half turn, ensuring continuous rotation in one direction.

A demodulator's primary function is to convert the modulated signal back to its original form so that the information can be retrieved.