The answer is cesium oxide
Answer:
Explanation:
To measure increase in length due to thermal expansion, the formula is
L₂ =L₁ ( 1 + α t ) where L₁ length increases to L₁ due to rise in temperature by t.
L₂ in both the case is same so
for aluminium
L₂ = 2.8 ( 1 + 23 X 10⁻⁶ t )
for steel
L₂ = 2.804 ( 1 + 12 X 10⁻⁶ t )
2.8 ( 1 + .000023t) = 2.804 ( 1 + .000012 t )
Solving this equation
t = 122C
Final temperature of both = 122 +20 = 142 C
6 mph/s
Calculating acceleration involves dividing velocity by time — or in terms of SI units, dividing the meter per second [m/s] by the second [s]. Dividing distance by time twice is the same as dividing distance by the square of time. Thus the SI unit of acceleration is the meter per second squared .