Answer: The given statement is false.
Explanation:
Lightening is defined as steady expansion of air within and surrounding path due to the sudden increase in pressure and temperature that leads to emission of lightning.
Basically, lightning is a state of plasma in which the molecules are very rapidly striking with each other as it also contains positively charged ions and negatively charged electrons.
Lightning always leads to the production of thunder.
Therefore, we can conclude that the statement not every lightning strike produces thunder, is false.
Answer:
Explanation:
To calculate the momentum of a moving object multiply the mass of the object times its velocity. The symbol for momentum is a small p. So, the momentum of the object is calculated to be 8.0 kg-m/s. Note the unit for momentum.
Answer:
Explanation:
Given that,
The pressure around the diver is
P = 10^5 Pa,
At a height of 10m
h = 10m
We want to find the force per square centimeter of the diver body
Pressure = force / Area
Force / Area = pressure,
And since the pressure is given
Then,
Force / Area = 10^5 Pa
Since 1 pascal = 1 N/m²
Force / Area = 10^5 N/m²
Since, we know that, 100cm = 1m
(100cm)² = (1m)²
10000cm² = 1m²
10⁴cm² = 1m²
Then,
Force / Area = 10^5 N/m² × 1m²/10⁴cm²
Force / Area = 10 N/cm²
The required force per unit area is 10 N /cm²
