What is the difference between mechanical waves and electromagnetic waves?
select one:...
Physics, 18.11.2019 23:31 lacilebeck69641
What is the difference between mechanical waves and electromagnetic waves?
select one:
a. electromagnetic waves are all high frequency; mechanical waves are all low frequency.
b. electromagnetic waves can travel through a vacuum; mechanical waves require a medium.
c. electromagnetic waves are visible; mechanical waves are invisible.
d. electromagnetic waves always reflect; mechanical waves always refract.
Answers: 1
Physics, 22.06.2019 18:00
Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point
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What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.
Answers: 1
Physics, 23.06.2019 11:40
As the ball rolls down the ramp, there are changes in kinetic and potential energy. how much kinetic energy does the ball have when it reaches point b? a) 0j b) 25j c) 50j d) 100
Answers: 3
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