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Aneli [31]
3 years ago
10

Do magnetic field lines ever start or end anywhere?

Physics
1 answer:
nevsk [136]3 years ago
4 0

Answer:

No

Explanation:

The lines of the field of a magnet don't begin or stop at anyplace, they generally make shut circles or loops and will proceed inside magnet (however here and there they are not drawn along these lines). We require an approach to show the bearing of the field.  

The field lines of a magnet don't simply end at the magnetic tip. They go directly through it, so that inside the magnet the magnetic field lines indicates from the south to the north pole.

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A small ball is attached to one end of a spring that has an unstrained length of 0.175 m. The spring is held by the other end, a
Liula [17]

Answer:

x(spring stretch)=1.74×10⁻³ meter

Explanation:

Given Data

l (length)=0.175 m

v (speed)= 3.86 m/s

x₁(stretch)=0.0140 m

x(spring stretch)=?

Solution

Centripetal force=Spring Constant

\frac{mv^{2} }{l}=kx_{1}\\  k=(1/x_{1} )\frac{mv^{2} }{l}\\ k=(1/0.014)(\frac{m(3.86)^{2} }{(0.175+0.014)} )\\k=m*5630.99

as

Spring force = gravitational force

kx=mg\\x=\frac{mg}{k}\\ x=\frac{m(9.8)}{m*5630.99}\\ x=\frac{9.8}{5630.99}\\ x=1.74*10^{-3} meter

5 0
3 years ago
How will you relate yourself to stellar evolution?
adoni [48]

Answer:

<em>Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe. The table shows the lifetimes of stars as a function of their masses.[1] All stars are formed from collapsing clouds of gas and dust, often called nebulae or molecular clouds. Over the course of millions of years, these protostars settle down into a state of equilibrium, becoming what is known as a main-seque</em>

6 0
2 years ago
A string is wrapped around a pulley with a radius of 2.0 cm. The pulley is initially at rest. A constant force of 50 N is applie
Ray Of Light [21]

Answer:

0.20kg-m^2

Explanation:

Let the linear velocity of the rope(=of pulley) is v m/s

Using kinematic equation

=> v = u + at

=>v = 0 + 4.9a

=>v = 4.9a ------------ eq1

By v^2 = u^2 + 2as

=>v^2 = 0 + 2 x v/4.9 x 1.2

=>4.9v^2 - 2.4v = 0

=>v(4.9v - 2.4) = 0

=>v = 2.4/4.9 = 0.49 m/s

Thus by v = r x omega

=>omega = v/r = 0.49/0.02 = 24.49 rad/sec

BY W = F x s = 50 x 1.2 = 60 J

=>KE(rotational) = W = 1/2 x I x omega^2

=>60 = 1/2 x I x (24.49)^2

=>I = 0.20 kg-m^2

5 0
3 years ago
What is the operating life time of a PV Module?
julia-pushkina [17]

Answer:

The industry standard life span is about 25 to 30 years, and that means that some panels installed at the early end of the current boom aren't long from being retired is the operating life time of a PV module .

5 0
2 years ago
Explain what happens to the particles in a substance during a physical change.
omeli [17]

Answer:

In physical changes no new materials are formed and the particles do not change apart from gaining or losing energy. ... Particles stay the same unless there is a chemical change whether the matter is solid, liquid or gas. Only their arrangement, energy and movement changes.

Explanation:

Hope this helps

7 0
3 years ago
Read 2 more answers
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