Answer:
Initial height L = 323.3m
Explanation:
Given:
Change in Length ∆L = 19.4cm 0.194m
Change in temperature ∆T = 41 -(-9) = 50°C
Coefficient of linear Thermal expansion of steel k = 12 × 10^-6 m/mK
Using the formula for linear expansion:
∆L = Lk∆T
L = ∆L/k∆T ....1
Substituting the given values into equation 1
L = 0.194/(12 × 10^-6 × 50)
Initial height L = 323.3m
C.
Explanation:
because they are equal in direction and differ in magnitude
Answer: The law of conservation of linear momentum helps to understand the behavior of a Newton's cradle In a closed system. This law is nothing more than action and reaction.it can be used to predict the resulting direction and speed of motion of objects after they collide.
Explanation: Just as an example, when you play pool/8ball, the white play exerts force on the other balls causing them to break away.
hope this helps.
Answer:
3.8 kg
Explanation:
The torque, <em>τ</em>, due to the force, <em>F</em>, is given by
where <em>r</em> is the radius.
This torque is also given by
where <em>I</em> and <em>α</em> are respectively the moment of inertia and the angular acceleration.
For a solid disk, its moment of inertia for an axis though its centre and perpendicular to its face is given by
where <em>m</em> is its mass and <em>r</em> is its radius.
Hence, we have
<span>Amplitude is the maximum extent of vibration
As by increasing the amplitude the wave speed ,frequency and wavelength will remain same so it will increase </span><span>the speed of the individual particle in the medium.
This will increase wave energy
so correct option is B
hope it helps</span>
