The specific heat of concrete is 880 J/kg C). how much heat energy from the sun would be needed to raise the temperature of a 1500 kg block on a concrete sidewalk from 0 C to 20 C HELP! ILL MARK BRAINLIEST

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