NEED HELP ASAP- Please show work The angular position of an object is given by θ = 4t3 +10t −40 , where θ is in radians and t is in seconds what is:

(a) (5 points) The angular velocity at t = 2 s?

(b) (5 points) The angular acceleration at t = 2 s?

In a particular chemical reaction, the energy of the reactants is 30 kj and the energy of the products is 5 kj. 
 the maximum energy of the system is 40 kj. sketch a potential energy diagram for this reaction. make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.