Given: F = 300 N; `"A" = 30 " cm"^2 = 30/(100xx100)"m" ^2 = 30xx10^-4 "m"^2`
To Find: Pressure
`therefore "P" = "F"/"A"`
`= 300/(30/(100xx100)`
` = (300xx100xx100)/30`
= 100000
= 105 Pa
Calculate the pressure in pascal exerted by a force of 300 N acting normally on an area of 30 cm2.
Given: F = 300 N; `"A" = 30 " cm"^2 = 30/(100xx100)"m" ^2 = 30xx10^-4 "m"^2`
To Find: Pressure
`therefore "P" = "F"/"A"`
`= 300/(30/(100xx100)`
` = (300xx100xx100)/30`
= 100000
= 105 Pa
A large He balloon of volume 1425 m3 is used to lift a payload of 400 kg. Assume that the balloon maintains constant radius as it rises. How high does it rise? [Take y0= 8000 m and `rho_"He"`= 0.18 kg m–3].
Pressure is reduced if .................... increases.
Name two factors on which the pressure on a surface depends.
Consider the statement given below and choose the correct option.
Assertion: Broad straps are used in bags.
Reason: Broad straps last for long.
In a pressure cooker, the food is cooked faster because ______.
At higher altitudes, atmospheric pressure is ______.
Give reasons why:
heavy trucks are fitted with 6 to 8 wheels
All flowing substances, both liquids, and gases are called ______.
Assertion (A): Air gets thinner with increasing altitude.
Reason (R): The atmospheric pressure increases as we go up in mountains.
Pressure is a scalar quantity because ______.