Which of the following are scalars? (mark all that apply)Select all that apply:Read this to meFrequency (how many times an event occurs in a particular time interval).Wavelength (the distance between wave crests)electrical potential (or voltage)Electrical CurrentspeedA time intervalmassI don't know
Question
Which of the following are scalars? (mark all that apply)Select all that apply:Read this to meFrequency (how many times an event occurs in a particular time interval).Wavelength (the distance between wave crests)electrical potential (or voltage)Electrical CurrentspeedA time intervalmassI don't know
Solution
Scalars are quantities that are fully described by a magnitude (or numerical value) alone. Here are the scalars from your list:
- Frequency (how many times an event occurs in a particular time interval).
- Electrical potential (or voltage)
- Speed
- A time interval
- Mass
Wavelength and Electrical Current are not scalars. Wavelength, although it has a magnitude, it is often associated with a direction in space, especially in the context of wave propagation. Electrical Current is a vector because it has both a magnitude (the amount of charge per unit time that is flowing) and a direction (the direction in which the charge is moving).
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