Controlled+Experiment

=**__ First Controlled Experiment Planning__**=

**The question**
How does the number of magnets affect the volume of the speaker?

**The independent variable**
Name of the variable: Number of magnets Letter symbol: n Unit for measurement: unitless Possible range of values: 1 magnet to 5 magnets

**The dependent variable**
Name of the variable: Volume Letter symbol: v Unit for measurement:dB Tool for measurement: sound level meter cable

**The controlled variables**
My speaker and the same music

Conclusion
== The number of magnets do affect the volume of the speaker. With more magnets, the stronger the magnetic field becomes. Therefore when the number of magnets increase, the volume of the speaker goes up. ==

=**__Second Controlled Experiment Planning__**=

**The question**
How does the length of the wire affect the volume?

**The independent variable**
Name of the variable: Wire Letter symbol: w Unit for measurement: cm Tools for measurement: ruler Possible range of values: 20 cm-50 cm

**The dependent variable**
Name of the variable: Volume Letter symbol: v Unit for measurement:dB Tool for measurement: sound level meter cable

=__Third Controlled Experiment Planning__=

The question
Does the distance between the cardboard and the plate affect the volume?

The independent variable
Name of the variable: The distance Letter symbol: d Unit for measurement: cm Possible range of values: 5 to 10 cm

The dependent variable
Name of the variable: Volume Letter symbol: v Unit for measurement:dB Tool for measurement: sound level meter cable = =