Final answer:
The quantities speed, volume, and power are scalars because they only have magnitude, while velocity, displacement, and acceleration are vectors because they have both magnitude and direction. The correct answer to the question is option (1).
Step-by-step explanation:
When distinguishing between vectors and scalars, we must consider whether a quantity has both magnitude and direction (vector) or just magnitude (scalar). Here are the identifications for the given quantities:
- Speed: Scalar - Speed is the magnitude of velocity and does not include direction.
- Velocity: Vector - Velocity includes both the speed of an object and its direction of travel.
- Displacement: Vector - Displacement is a vector that represents the change in position of an object and is direction-dependent.
- Volume: Scalar - Volume represents how much space an object occupies, with no direction involved.
- Acceleration: Vector - Acceleration is the rate of change of velocity over time, which includes a direction component.
- Power: Scalar - Power is the rate at which work is done or energy is transferred, without regard to direction.
Therefore, the correct identification is: (1) speed: scalar, velocity: vector, displacement: vector, volume: scalar, acceleration: vector, power: scalar.