Answer:
The speed of the wire is 5 m/s.
Explanation:
Given that,
Length = 20 cm
Magnetic field = 0.1 T
Current = 10 mA
Resistance 
We need to calculate the speed of the wire
Using formula of emf
Using formula of current
Put the value of 
into the formula of current
Hence, The speed of the wire is 5 m/s.
We all know that the sound travels faster through solids and then liquids and then through gases.
As far as i know solids are the medium through which the sound travels fast.
But in some websites I saw that as the density increases , the velocity of the sound decreases.If this statement is correct , how come the sound travels fastest through solids (since they have higher density)
From this it is clear that not only sound as compression wave But also in the form of Shear wave travels in Solids
This makes it easier for sound to travel with higher speed in solids
Answer:
Not enough information given. Are there answer choices? Or more details given in the question?
Explanation:
The amount of birds nests depends on whether or not the trees have more or less leaves.
The independent should be the trees/leaves.
The dependent variable should be the birds nests.
Hope this helped ^-^
