Atomic number means the number of protons (p). So the answer is B) because the thats the only one with p = 4
Given :
A 2450 kg stunt airplane accelerates from 120 m/s to 162 m/s in 2.10 s.
If the airplane is putting out an average force of .
To Find :
The average friction force exerted on the airplane by the air.
Solution :
Acceleration is given by :
Now, force equation is given by :
Therefore, frictional force exerted in the airplane by the air is 9810 N.
Answer:
SI units are the physical units of measurement. SI units include kilogram, meter, second, ampere, kelvin, candela, and mole etcetera.
<u>SI units are very important for daily life while measuring daily life commodities, such as:</u>
- Use of kilograms and grams while buying or selling sugar or other food items.
- Use of kilometers and meters while covering distances.
- Use of meters or inch by carpenters while estimating the lengths for furniture.
- Use of hours, seconds and minutes to measure time duration.
- Use of ampere and volt to measure current and voltage respectively by electricians.
Without SI units, it would be difficult to meausre the amount of object required or any other measurement object.
Answer:
The product of the two numbers is 2.33* 10^13
Explanation:
Given
4.31x10⁷ and 5.41x10⁵
Required
Multiply
The multiplication of the two digits is represented as thus:
This can also be rewritten as
Multiply 4.31 and 5.41
Apply laws of indices
The scientific notation is always in the form:
Where
So:
23.3171 can be rewritten as 2.33171 * 10
So, we have:
Also, apply law of indices again
It's always advisable (but not compulsory to approximate to 1 or 2 decimal places)
So:
<em>Hence; the product of the two numbers is 2.33* 10^13</em>