Sunspots usually come in pairs of north and south magnetic poles
Indicate whether the statement is true or false
TRUE
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The principal advantage of ac power over dc power is that
A) more energy is dissipated during transmission. B) ac voltage oscillates while dc voltage does not. C) ac voltage can be transformed via conventional transformers. D) ac circuits multiply power more easily. E) ac circuits are safer.
The bulk modulus of a material, as a meaningful physical property, is applicable to which of the following?
a. only solids c. only gases b. only liquids d. solids, liquids and gases
Of the various types of electromagnetic radiation, which is the most penetrating through all forms of matter?
a. infrared b. gamma c. visible light d. ultraviolet
If you locate the north celestial pole in your local sky and measure its altitude, then you will know
A) your latitude and longitude. B) your latitude and the direction that is due north for you. C) your longitude and the direction that is due north for you. D) your latitude and the local time. E) your latitude, longitude, and local time.