Physics, 04.11.2019 17:31 lilblackbird4
The ratio of coils of wire in the primary winding to the secondary winding of a transformer is 3: 2. how does the transformer change the voltage of a current applied to the primary winding?
it increases to three-halves times the original.
it decreases to two-thirds the original.
it increases to three times the original.
it decreases to one-third the original.
Answers: 3
Physics, 22.06.2019 00:40
Aballet student who learns with the of his instructor is demonstrating learning.
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Physics, 22.06.2019 08:00
While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit
Answers: 2
Physics, 22.06.2019 16:30
In the nineteenth century, gregor mendel first determined some basic rules of genetics that have been observed throughout all types of life. no observations have disproved these basic rules of genetics. charles darwin developed the idea of biological evolution around the same time, but he was unaware of mendelās discoveries in genetics. over a century later, darwinās idea of evolution was modified in order to incorporate mendelās rules of genetics along with the other evidence that darwin had used. what is most likely the relationship between mendelās rules of genetics and darwinās idea of biological evolution? a.)mendelās genetics states laws that are now part of the theory of biological evolution.b.)biological evolution states laws that are part of mendelās theory of genetics.c.)mendelās genetics replaced darwinās entire concept of biological evolution.d.)biological evolution is a law that explains why all genetics exist.
Answers: 1
Physics, 23.06.2019 02:30
Atrain is traveling at 30.0 m/s relative to the ground in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound in air should be taken as 344 m/s. what frequency (f approach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? what frequency (f recede) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and receding from it?
Answers: 1
The ratio of coils of wire in the primary winding to the secondary winding of a transformer is 3: 2....
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