The answer to this question is :
D. Obstacle Evaluation
Geiger-Muller tube is instruments requires you test three times the background of the work area.
<u>Explanation</u>:
These detectors are gas filled detectors and hence requires time for responding to the value. This time is taken because during this period it collects the electric charges and features of the electric circuit. It also gets stabilized during this period. This device has thumb rule i.e one must wait or hold for at the least 3 times the time constant before getting the precise and accurate reading. The time constant order is 10 seconds for the ionization chamber but for the Geiger counter it can vary from seconds to greater than 20 seconds
Directly
Explanation:
The average kinetic energy of a gas particle is directly proportional to the temperature. An increase in temperature increases the speed in which the gas molecules move. All gases at a given temperature have the same average kinetic energy.
If not parents had a recessive type O allele, they would have a 1/4 or 25% chance of having a child with type O blood
Answer:
precipitation falls on a rock formation
Explanation:
its because of water, wind and other natural disasters a erosion occurs.
so in this case it should be option 2.
