0.00056 in scientific notation is correctly represented as 5.6 x 10^-4.

The speed of light in vacuum is approximately 3.00 × 10^8 m/s.

The correct unit for measuring area is square meter.

The SI unit for electric charge is Coulomb (C).

The SI unit for measuring electric current is the Ampere.

The correct unit for measuring energy is Joule (J).

Trailing zeros in a decimal are significant.

2500 has 2 significant figures unless specified with a decimal point.

25.00 has 4 significant figures due to the trailing zeros after the decimal.

The number 100 has only 1 significant figure unless specified otherwise.

0.00560 has 3 significant figures, 0.0560 has 3 significant figures, 0.560 has 3 significant figures, and 5.60 has 3 significant figures. However, 0.00560 is the smallest number, but all have the same count of significant figures.

7.890 x 10^3 has 4 significant figures, while the others have 3, 3, and 4 respectively, but the leading zeros in the first and last options do not count.

0.0300 has three significant figures (the zeros after the 3 are significant because they come after a decimal point).

In the operation 3.00 x 4.0, 3.00 has three significant figures and 4.0 has two. The result will have two significant figures, which is the least among the options.

Work is defined as force times distance, and its dimensions are ML^2T^-2, which are the same as energy.

Frequency has the dimension of [M^0 L^0 T^-1] as it is defined as the number of cycles per unit time.

Angle is a dimensionless quantity and has the dimension of [M^0 L^0 T^0].

Velocity has the dimension of [M^0 L^1 T^-1], as it is defined as distance per unit time.

Energy and work both have the same dimensions of [M^1L^2T^-2]. Power has dimensions of [M^1L^2T^-3].

Energy has the dimension of [M^1 L^2 T^-2].

Energy and work both have the same dimensions of [M⁰L²T⁻²], as they are equivalent.

Angle is a dimensionless quantity and has the dimension [M^0 L^0 T^0].

Velocity has the dimension [M^0 L^1 T^-1], as it is defined as distance per unit time.

Energy has the dimension [M^1 L^2 T^-2].

Temperature is a scalar quantity as it has magnitude but no direction, while velocity, force, and acceleration are vector quantities.

All the options are dimensionally consistent with energy, as they can be expressed in terms of [M^1 L^2 T^-2].

Reynolds number is dimensionless as it is a ratio of inertial forces to viscous forces.

Both work and energy are measured in Joules (J) in the SI system.