Question 10 of 10 Which feature of electromagnets makes them more useful than permanent

magnets in many modern technologies?

A. The current can be adjusted to control the strength of the

magnetic field.

B. Electromagnets are not dependent on a power supply.

C. Electromagnets cannot be turned on and off.

D. The strength of the magnetic field is more consistent in

electromagnets

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation