Elena makes a table to organize the functions of electric motor components. which functions belong in the cells marked x and y? component function brush x commutator y a. x: conducts current to the armature and reverses direction of current y: rotates as a result of changing magnetic forces b. x: rotates as a result of changing magnetic forces y: conducts current to the armature and reverses direction of current c. x: allows current to flow into the commutator y: conducts current to the armature and reverses direction of current d. x: allows current to flow into the commutator y: rotates as a result of changing magnetic forces

What is the relationship between the direction of motion of the balloon and the wind currents

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving