"if the end of the crutch is a circle of radius 1.2 cm without the tip, and the rubber tip is a circle of radius 2.3 cm , by what factor does the tip reduce the pressure exerted by the crutch? "

The pressure exerted by the crutch is reduced factor by 0.72.

Explanation:

Given that,

Radius of crutch = 1.2 cm

Radius of tip = 2.3 cm

We need to calculate the pressure without tip

Using formula of pressure

Put the value into the formula

....(I)

We need to calculate the pressure with tip

Using formula of pressure

....(II)

We need to calculate the reduction factor

Using formula of reduction factor

Put the value into the formula

Here, F is the same

The pressure exerted by the crutch is reduced by 72%.

Hence, The pressure exerted by the crutch is reduced factor by 0.72.

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

the answer for apex is the lowest