Which row of the table contains only scalar quantities? | | speed | displacement | current | |---|-----------|--------------|-----------| | B | energy | mass | momentum | | C | power | time | work done | | D | acceleration | work done | temperature | (Total for Question 2 = 1 mark) - Edexcel - A-Level Physics - Question 2 - 2023 - Paper 1

To determine which row contains only scalar quantities, we need to first understand the difference between scalar and vector quantities:

• Scalar quantities are those that have magnitude only, such as energy, mass, and temperature.
• Vector quantities have both magnitude and direction, such as speed, displacement, acceleration, and momentum.

Now, let's analyze each row:

• Row A: Speed (vector), Displacement (vector), Current (vector) - Contains vectors.
• Row B: Energy (scalar), Mass (scalar), Momentum (vector) - Contains one vector.
• Row C: Power (scalar), Time (scalar), Work done (scalar) - All are scalars.
• Row D: Acceleration (vector), Work done (scalar), Temperature (scalar) - Contains one vector.

Thus, the row that contains only scalar quantities is Row C.