Physics, 25.06.2019 01:00 citlalli30
The principle of the photoelectric effect is: the electromagnetic theory of light the special theory of relativity the principle of superposition the quantum theory of radiation
Answers: 2
Physics, 22.06.2019 09:00
Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.
Answers: 3
Physics, 22.06.2019 18:30
Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton
Answers: 2
Physics, 23.06.2019 02:00
How many electrons does each element require in its valence shell to become stable?
Answers: 1
Physics, 23.06.2019 11:10
Many scientists like to study cosmic objects in the uv spectrum because objects giving off large amounts of uv light are typically and
Answers: 3
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