B. solid
Explanation:
The solid state of matter is made up of particles that build repeating patterns. Solid is one of the four physical states of matter.
- Matter is described as anything that has weight and occupies space.
- The four states of matter are solid, liquid, gas and plasma.
- Solid particles are known to be closely packed and held together by very strong attractive forces.
- Solid like sodium chloride are said to be crystalline because they have crystals.
- Crystals are ordered atomic structures formed by repeating units of the fundamental molecular units.
- The repeating patterns of the crystals builds to form a solid.
- Other states of matter do not posses the repeating crystalline structure of solids.
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Greenhouse gases are considered as one of the main reasons behind global warming on our planet earth. The poisonous gases emitted by the industries, vehicles and other medium are increasing the rate of global warming. When these type of emissions are controlled, then the global warming is bound to reduce. It has been scientifically proved that on days when vehicles are less on the roads or on days when industries are closed, the greenhouse gases are emitted less and this results in lesser amount of pollution. This in turn definitely helps to reduce global warming.
Answer:
t = 186.2 μs
Explanation:
Current in LR series circuit
----(1)
steady current = I_{s} = V/R
time constant = τ =
= 0.268 ms
magnetic energy stored in coil = 
rate at which magnetic energy stored in coil= 
----(2)
rate at which power is dissipated in R:
---(3)
To find the time when the rate at which energy is dissipated in the coil equals the rate at which magnetic energy is stored in the coil equate (2) and (3)
[/tex]I=\frac{L}{R}\frac{dI}{dt}[/tex]----(4)
differentiating (1) w.r.to t
---(5)
substituting (5) in (4)
----(6)
equating (1) and (6)
L= 4.3 mH
R= 16 Ω
t = 186.2 μs
First we have to calculate the time taken to travel the distance 30 m, is
.
Now from equation of motion,
Given, 
.
As object starts from rest, so u = 0.
Substituting these values in above equation, we get
.
Thus, the acceleration is 
