please put all answers to atleast three sig figs Dr Terror h

please put all answers to atleast three sig figs

Dr. Terror has developed a new alloy called Ultranomium. He\'s testing a bar that is 1.00 m long and has a mass of 300. grams. Using a carbon-dioxide infrared laser, he carefully heats the bar from 20.0C to 235C. The bar absorbs 75000 J of energy from the laser. What is the specific heat capacity of the Ultranomium? K/J-g He notices that at this new temperature, the bar\'s length has increased by 0.250 mm. What is the coefficient of linear expansion for Ultranomium? Times 10^-6 C^-1

Solution

1. Q=ms(T₂ - T₁)

s =Q/m(T₂ - T₁) =75000/0.3*(235-20)=1162.8 K/J-g

2. change in length =length*coefficient of linear expansion * (T₂ - T₁)

coefficient of linear expansion= change in length /length* (T₂ - T₁)=0.250*10^-3/1*215 =1.162*10^-6 C^-1