You heat a circular steel sheet of diameter 50.0 cm in an oven. what will be the radius for 50 k increase in temperature?

R = 50.016 cm

Explanation:

Coefficient of thermal expansion for steel is given as

now as we know that the change in the length due to thermal expansion depends of change in temperature and initial length of the object

so here we will have

here we know that

now we will have

so final radius of the disc will be R = 50.016 cm

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

this is poiselle's equation from fluid mechanic in physics. mech eng