What does it mean for a hypothesis to be testable? O A. It must be able to reject biased data.
O B. It must be supported by peer review.
O C. It must be able to be supported or refuted by data.
O D. It must be what the scientist is hoping is the result.

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.)