Students set up an experiment in which a block is given an initial push on a rough horizontal surface, and the block slides thro
ugh a photogate. The photogate is used to determine the block’s speed, and the students use a meter stick to measure the distance that the block slides past the photogate before coming to rest. The students repeat the experiment for several trials. For each trial, the block is given a different speed through the photogate. __________ is a scientific hypothesis that can been tested by the data collected by the students.
A theory is a scientific postulate that can be proved through experiments and the data that comes from them. Nevertheless, theories are always open and susceptible for change, because they are not an absolute truth and further experiments can lead to different conclusions.
Bēowulf [ˈbeːowulf]) is an Old English epic poem consisting of 3,182 alliterative lines. It is one of the most important works of Old English literature. The date of composition is a matter of contention among scholars;
The answer is C) Dredging to reclaim beaches can stop erosion, but it can also create other problems, because the article mentions that dredging can help, but it also creates it's own problems, such as causing harm to the plants and animals native to the collection site, and it is a very costly process.
