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3
1 point
Three skateboarders take three different paths to the top of the half-pipe
to start skateboarding at position 1. The skateboarders are all the same
height and weight. Which skateboarder will have the greatest amount of
gravitational potential energy?
The skateboarder who took the stairs.
The skateboarder who skateboarded up the half-pipe.
The skateboarder who walked up the half-pipe.
O
The gravitational potential energy is the same for all of the
skateboarders.
4
1 point
What is happening at the top of the roller coaster track at position 2?

explanation:

crosscutting concepts have application across all domains of science. as such, they are a way of linking the different domains of science. they include patterns; cause and effect; scale, proportion, and quantity; systems and system models; energy and matter; structure and function; and stability and change.

possibly, yes.

explanation:

the amount of sugar you take in is dangerously high, risk of heart disease, high risk of diabetes, and etc.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

c) should be the answer.