Answer:
Properties of semiconductors are determined by the energy gap between valence and conduction bands. To understand, what is semiconductor, we have to define these terms. In solid-state physics, the energy gap or the band gap is an energy range between valence band and conduction band where electron states are forbidden.
The lemon battery hypothesis states that a lemon is acidic enough to carry an electric charge and act as a battery.
Answer:
resultant velocity of boat will be 11.2249 m/sec
Explanation:
We have given speed of boat
= 10 m /sec
Velocity pf current flow
= 4 m /sec
Angle at which boat is moving = 60°
We have to find the resultant velocity
We know that resultant velocity is given by 
So resultant velocity of boat will be 11.2249 m/sec
Answer:
w = w₀ M / (M + 2m)
Explanation:
This exercise can be solved using the concepts of conservation of angular momentum
L = I w
Let's write in angular momentum in two points
Initial. Before impact
L₀ = I w₀
Final. After the rock has stuck
= I w + (m r²) w
The system is formed by the disk and the rock, so that the forces and moments during the crash are internal and the angular momentum is preserved
L₀ = 
I w₀ = (I + m r²) w
w = w₀ I / (I + m r²)
The roundabout is a disk so its moment of inertia is
I = ½ M r²
w = w₀ ½ Mr² / (½ M r² + mr²)
w = w₀ ½ M / (½ M + m)
w = w₀ ½ M2 / (M + 2m)
w = w₀ M / (M + 2m)
Answer:
the ball experiences the greater momentum change
Explanation:
You have to take into account that momentum change is given by

where vf and vb are the speed of the object after and before the impact.
In the case of the ball you have

where the minus of vf is included due to the motion is in an opposite direction regarding with vb
And for the lump

Hence, the ball experiences the greater change
hope this helps!!