Answer:
Check the explanation
Explanation:
Kindly check the attached image below to see the step by step explanation to the question above.
Answer:
Volume of balloon = 1000 cm^3
Explanation:
The head of a normal person can be assumed as a sphere with radius 10 cm.
Volume of sphere
, where r is the radius.
We have approximate radius = 10 cm.
Approximate volume of head 
In the given options the closest value to the approximate volume is 1000 cm^3.
So, volume of head = Volume of balloon = 1000 cm^3
Answer:
<em>The minimum pressure car tire pressure is 300,000 Pa</em>
Explanation:
<u>Pressure</u>
It's a measure of the force exerted by an object per unit surface:

Where F is the force applied on a surface area A.
We are given the total weight of a car with passengers as Ft=30,000 N and we also know the area of contact of each tire with the ground as
.
The minimum pressure each tire can have is when the total weight is evenly distributed in all four tires, thus F=Ft/4=7,500 N.
Calculating the pressure:

P=300,000 Pa
The minimum pressure car tire pressure is 300,000 Pa
A land form is a natural feature of earths surface and a land mark is can be man-made or natural and it is used to mark something significant.