The answer is: An electromagnet is a (Solenoid) with a (metal) core.
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Answer:
756.88 Volts will be the potential difference across each capacitor.
Explanation:

Q = Charge on capacitor
C = Capacitance
V = Voltage across capacitor
Capacitance of first capacitor = 
Charge of first capacitor = 
Voltage across first capacitor = 


Capacitance of first capacitor = 
Charge of second capacitor = 
Voltage across first capacitor = 


Both the capacitors are disconnected and positive plates are now connected to each other and the negative plates are connected to each other. These capacitors are connected in parallel combination.
Total charge = Q

Total capacitance in parallel combination:

Potential across both capacitors = V

756.88 Volts will be the potential difference across each capacitor.
Answer:
electromagnetic waves only
Explanation:
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Answer:
Due to the process of weathering and erosion.
Explanation:
- As the rocks are made of different forms of minerals they may have an igneous, metamorphic or sedimentary origin. Hence the natural stone surfaces can be made of granite, lime, or even shale.
- The process of physical weathering that is called as mechanical weathering of rocks tends to break them apart and leads to the development of crack and small openings.
- The diurnal exposure of bare rocks to extreme temperatures of day and night leads to onion peeling and slowly with water as an agent of erosion lead to cracks in joints of rocks.