Pick out the two scalar quantities in the following list: force, angular momentum, work, current, linear momentum, electric field, average velocity, magnetic moment, relative velocity.
Work and Current
Explanation
The provided text defines a scalar quantity as a quantity with magnitude only, specified completely by a single number and unit. From the list, work and current are the two scalar quantities. The other quantities (force, angular momentum, linear momentum, electric field, average velocity, magnetic moment, relative velocity) are vectors because a direction is associated with them. For instance, the table in the context explicitly lists average velocity as a vector.
Solution Steps
Step 1: Identify the definition of a scalar quantity from the text: 'A scalar quantity is a quantity with magnitude only.'
Step 2: Analyze the list items based on this definition. Force, angular momentum, linear momentum, electric field, magnetic moment, and relative velocity are vector quantities (they have direction).
Step 3: Identify 'Work' and 'Current' as the quantities that have magnitude only and no associated direction, fitting the definition of scalars.