Answer:
has free electrons
Explanation:
A conductor has free electrons while an insulator does not. Free electrons are electrons which are not bounded tightly to their parent atoms, and are free to move given the right conditions (ie. a strong EM field).
A. fixed volume, changeable shape.
The elastic potential energy stored in a spring is given by:
where k is the spring constant, and x=0.5 is the compression of the spring. Re-arranging the formula and using E=5 J, we find the spring constant:
Length
The metric unit used to measure length in International System (SI) is meter and it is represented by letter m.
Length can be measured by a metric scale.
Mass
The metric unit used to measure Mass in International System (SI) is Kilograms and it is represented by letter Kg.
Mass can be measured by an instrument called Balance.
Volume
The metric unit used to measure Volume in International System (SI) is Liter and it is represented by letter l.
Volume can be measured by a container called graduated cylinder.
Temperature
The metric unit used to measure Temperature in International System (SI) is Kelvin and it is represented by letter K.
Temprature is measured by most common divice called thermometer.
Answer:
It decreases
Explanation:
The air pressure tends to be higher on the places with the lowest altitudes, and lower at the places with higher altitudes. Basically, the air pressure is the wight of the air, and since the air is denser and heavier at the lower altitudes, the air pressure is higher, while on the higher altitudes the air is less dense, thus the air pressure is lower. So in practice we can expect that the air pressure in a low valley will be higher than the air pressure at the top of higher mountain.
