(a) suppose a meter stick made of steel and one made of invar are the same length at 0°c. what is their difference in length at 48.0°c? mm (b) repeat the calculation for two 34.0 m long surveyor's tapes. mm

Explanation:

Given that,

Initial temperature

Final temperature

Length = 34.0 m

We know that,

Coefficient of linear expansion of Invar is

Coefficient of linear expansion of steel is

We need to calculate the temperature difference is

We need to calculate the change in length of Invar

Using formula of change in length

Put the value into the formula

We need to calculate the change in length of steel

Difference in length of two 34.0 m

Long surveyor's tapes is

Put the value into the formula

The difference in length is 18.12 mm.

Hence, This is the required solution.

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach