Answer:
The van der wall forces are existed between separate molecules of water but not between the hydrogen and oxygen molecules.
Explanation:
<em>Van der wall forces include repulsion and attraction between the atoms, surfaces and molecules.</em> <em>The intermolecular forces are also included in the van der wall forces. Basically, van der wall forces are the forces that are formed between molecules of the same molecules but not with the different molecules of the same substance.</em> Take water molecules into consideration,<em> van der wall forces exist between the water molecules but these forces are not associated between hydrogen and oxygen molecules. </em>These forces are fragile than ionic bond and covalent bond.
Answer:
<h3>The answer is 200 s</h3>
Explanation:
To find the duration or time taken we use the formula
where
d is the distance
v is the velocity
From the question
d = 800 m
t = 4 m/s
We have
We have the final answer as
<h3>200 s</h3>
Hope this helps you
Answer:
E = 2.17 x 10⁻² V/m
Explanation:
First we will find out the current density by using the formula:
J = I/A
where.
J = Current Density = ?
I = Current = 5.5 A
A = Cross-Sectional Area = πr² = π(1.5 x 10⁻³ m)² = 7.068 x 10⁻⁶ m²
Therefore,
J = 5.5 A/7.068 x 10⁻⁶ m²
J = 0.778 x 10⁶ A/m²
Now, we calculate the magnitude of applied field:
E = ρJ
where,
E = Magnitude of applied field = ?
ρ = resistivity of Aluminum = 2.8 x 10⁻⁸ Ω.m
Therefore,
E = (2.8 x 10⁻⁸ Ω.m)(0.778 x 10⁶ A/m²)
<u>E = 2.17 x 10⁻² V/m</u>
True if you actually did it. false if you didn't
Answer:
The circular loop experiences a constant force which is always directed towards the center of the loop and tends to compress it.
Explanation:
Since the magnetic field, B points in my direction and the current, I is moving in a clockwise direction, the current is always perpendicular to the magnetic field and will thus experience a constant force, F = BILsinФ where Ф is the angle between B and L.
Since the magnetic field is in my direction, it is perpendicular to the plane of the circular loop and thus perpendicular to L where L = length of circular loop. Thus Ф = 90° and F = BILsin90° = BIL
According to Fleming's left-hand rule, the fore finger representing the magnetic field, the middle finger represent in the current and the thumb representing the direction of force on the circular loop.
At each point on the circular loop, the force is always directed towards the center of the loop and thus tends to compress it.
<u>So, the circular loop experiences a constant force which is always directed towards the center of the loop and tends to compress it.</u>