Answer:
current = 2.5A
Explanation:
We can use Ohm's law which states that V∝R so V=IR when the temperature is constant where V is the voltage (potential difference), I is the current and R is the resistance.
75= 30I
I= 75/30= 2.5A
Physical changes refer to alterations in the properties or characteristics of matter without changing its chemical composition. Some examples of physical changes include changes in state, size, shape and color.
Changes in state are common physical changes that occur when matter transitions between solid, liquid, or gas phases. This change occurs due to a change intemperature or pressure. For example, water freezing into ice or boiling into steam are examples of changes in state.
Changes in size, shape, and texture occur when matter undergoes physical alterations without any changes in its chemical composition. For instance, cutting a piece of paper into small pieces, hammering a metal sheet to make it thinner, or molding clay into a different shape are all examples of physical changes.
Changes in color are also physical changes. They occur when the light-reflecting properties of a material change due to a physical alteration. For instance, when copper is exposed to air, it turns green due to a chemical reaction, but when iron rusts, it changes color due to a physical change in its surface.
learn more about Pressure here.
#SPJ11
Answer:
It can hurt you if you get a carpet burn if you rub against carpet really fast and hard. It can help by keeping your shoes from slipping around all the time when you walk/run. Same with bike tires.
Explanation: