two times
Each cycle includes two changes of direction.120 changes of direction per second = (120 / 2) = 60 cycles per second = 60 Hz.
The current changes direction twice for each complete rotation of the loop in the magnetic field.
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Wind blows from areas of high pressure to areas of low pressure. Changes in wind direction would be a result in changes in air pressure due to factors such as altitude and temperature. Another thing that changes the direction of the wind is known as the coriolis effect, which causes winds in each hemisphere to curve. This effect is a result of Earth's rotation.
diodes conduct electricity in only one direction but as ac change direction in each of its cycle diodes can only conduct half of its cycle which will give u a pulsating dc. but if dc is mixed with ac and if it can put whole of its cycle in positive direction diode can conduct ac. so diodes are usually used to produce dc from ac.
It shows each of the 4-digit numbers just once in a 12 hour cycle. If you were asking how many times each digit, 0-9, appears in a 12 hour cycle: 0 - 252 times 1 - 492 times 2 - 312 times 3 - 252 times 4 - 252 times 5 - 252 times 6 - 132 times 7 - 132 times 8 - 132 times 9 - 132 times Assuming that times like 9:52 do not appear as 09:52.
No. The direction of the current is constantly changing, reversing direction at twice the "frequency" of the AC. For house-current in the US, that means it reverses direction 120 times every second. That's why it's called "alternating".
A translation of a shape moves it in the same direction and the same distance from each given point.
When light travels from one medium to another, factors that change include the speed of light, the wavelength of light, and the direction of light. These changes are caused by the different optical properties of each medium, such as refractive index and density.
The menstrual cycle is the natural changes of the uterus and ovaries in the part of making sexual reproduction possible. The average length of each cycle is 28 days, divided into 2 parts (ovarian cycle and uterine cycle), each with 3 phases. The beginning of menstrual flow, or period, marks the end of one menstrual cycle and start of a new one.
The series of changes that an organism undergoes during its lifetime is called its life cycle. This includes stages such as birth, growth, reproduction, and death. Each species has a unique life cycle.
Any cyclic phenomenon such as a sine wave follows this description.