1.which of the following are true.
a. theories turn into laws with enough proof.
b. a hypothesis can be proven incorrect through experimentation.
c. a theory describes a natural phenomenon but offers no explanation for how it occurs.
d. a scientific law cannot be disproven by future observations

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

In the first law of thermodynamics, triangle e=q-w, what does q stand for