What is the mass of a sample whose specific heat is 6.28 j/g·°c if the sample absorbs 19.4 j and has a temperature increase of 22.9 °c?
a)0.135 g
b)0.324 g
c)7.41 g
d)70.7 g

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600