Answer:
In metals there are free electrons at normal temperature so when we increase temperature it resistivity gets increases,so conductivity decreases,while in semiconductor the electrons are not free so when we increase the temperature the covalent bonds begin to break and the electron becomes free so conductivity get.
Explanation:
Answer:
He did not do it very well.
Answer
graph 2
Explanation
Velocity is the rate of change of displacement.
Velocity = (change in displacement)/(change is time)
In graph 2, the gradient of the curve is positive, indicating that the velocity is positive.
Acceleration is the rate of change of velocity.
The steepness of the slope of the same graph (graph 2) is decreasing. This shows that the velocity is decreasing hence a negative acceleration.
Answer:
basic quantity. s.I unit. equipment
length M or Cm . metre rule
mass. Kg or G. spring/weight balance
time. Seconds. clock/stopwatch
Temperature. kelvin/celcius thermometer
volume. L/Ml/Cl. measuring cylinder