Iapply 40,000 joules of energy to a 400 gram block of a substance, which causes its temperature to rise 40 degrees. this substance has a specific heat of j/kg°c. (a) 2500 (b) 2.5 (c) 5.0 (d) cannot be determined

false

explanation:

boats, things on boats luggage are way more heavy then water.

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.