B. longitudinal wave
Explanation:
Longitudinal waves are made up of regions of rarefaction and compression. They are waves that are propagated parallel to their source.
- During wave compression, molecules are pressed together and are closer to each other.
- Rarefaction is where molecules are farther apart and are distant.
- In longitudinal waves, the source is parallel to the wave propagation.
- Transverse waves are perpendicular to their source.
- Electromagnetic consists of vibrations in both perpendicular direction.
- Surface waves are seismic waves that are made up of both transverse and longitudinal components.
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Answer:
endothermic energy or chemical energy
Explanation:
An endothermic process increases the enthalpy H of the system, during which the closed system (usually) absorbs thermal energy from its surroundings.
Chemical energy is the form of potential energy in which energy is stored in chemical bonds. The breaking of chemical bonds absorbs energy, while the formation of new bonds releases energy.
Answer:
Explanation:
Total resistance of 2 bulb in series
= 100 +100 = 200 ohm
current in each bulb
= 9/200 = .045 A
In case of parallel combination of bulb
total resistance
= 100 x 100 / (100+100)
50 ohm
current in the main circuit
= 9 / 50 A
current in each bulb
= 9 / (2 x 50)
.09
So in the second case current is more , hence heat generated too will be more . So brightness too will be more.
First set ( in series ) will be dimmer.
