A toy cart moves with a kinetic energy of 40 J. If it moves with twice the speed, its kinetic energy will be
A) 40 J.
B) 80 J.
C) 160 J.
D) unknown unless we know the mass of the cart.
C
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The friction of distance means that the further away a place is, the less likely the interaction with it
Indicate whether this statement is true or false.
Our economic systems promote unsustainable forms of industrialized agriculture because
a. they so successfully provide healthy food to our populations b. they do not include most of the harmful environmental and health costs of such food production in the market prices c. they are so effective in cutting costs d. they provide so many jobs e. the food production is so efficient
The cytochromes found in complex III of the electron and H+ transport chain all contain a heme group. In the these heme groups an iron atom is bound to which of the following?
A) two nitrogen atoms B) two sulfur atoms C) four nitrogen atoms D) four sulfur atoms
Exfoliation can be the result of unloading or ________
A) jointing B) glaciation C) sideways compression D) chemical weathering E) salt wedging