Aflat metal washer is heated. as the washer's temperature increases, what happens to the hole in the center? a flat metal washer is heated. as the washer's temperature increases, what happens to the hole in the center? the hole in the center of the washer will contract. the hole in the center of the washer will expand. changes in the hole cannot be determined without know the composition of the metal. the hole in the center will remain the same size.

To solve this exercise it is necessary to take into account the concepts related to thermal expansion.

The thermal expansion is given by the function,

Where,

Change in Length

Change in Temperature

Coeficiente de dilatación lineal

Initial Length

By quickly deducing the formula, we can realize that the greater the change in temperature, the greater the change in the length of the radius.

The change in length is proportional to the change in temperature. Considering that the other two terms are constant we have that the correct one would be: The hole in the center of the washer will expand.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2