Question 21 of 25 Which statement describes a question that can guide the design of a
scientific investigation?
O A. It asks about how the observations will be organized.
O B. It asks about whether a controlled variable is necessary.
C. It asks about a cause-and-effect relationship between two
variables.
D. It asks about the preferred outcome of the investigation.

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

The slope of a velocity time graph over any interval of time gives the during that interval

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)