Answer:
an armature a permanent magnet brushes slip rings
Explanation:
Ultrasounds have sound waves that have frequencies greater than 20,000Hz (20 kHz). This is above the normal hearing range for humans which is why we can not here ultrasounds
Yes titanium is stronger metal which is know for its softness , gold contains additional metals which makes it harder
EM stands for ElectroMagnetic.
Answer:
Geothermal energy can be trapped using geothermal plants that utilizes steam escaping from the earth surface to make electricity.
The limitations include :
- depletion of the geothermal source
- high costs of investments required for geothermal systems
Explanation:
Geothermal energy originates in form of heat/steam escaping from the inner parts of the earth surface. The steam trapped is converted to electricity through turbines. The hot water pumped by heat pumps can be used to heat homes or for heating purposes in industries.
The limitations of geothermal energy are high initial capital costs for installing the systems, depletion of geothermal sites after sometime, environmental concerns due to greenhouse gases emissions and land requirements for geothermal projects.