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Leno4ka [110]
3 years ago
12

What magnet maintains its magnetic proaperties even in the absence of an external magnetic field? a) Ferromagnet b Paramagnet c)

Diamagnet d) Electromagnet e) Ferrimagnet
Physics
1 answer:
insens350 [35]3 years ago
5 0

Answer:

(a) Ferromagnet

Explanation:

Ferromagnetism is defined as the property by which certain magnets form the permanent magnets.

It is tone of the strong magnetism and it is common phenomenon of magnet in the everyday life of magnetism.

Permanent magnets are made up of ferromagnetic material, in this if the magnetic field is applied then this material is magnetized but do not losses its magnetic property after removal of external magnetic field.

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Which are examples of short-term environmental change? Check all that apply.
d1i1m1o1n [39]

Answer:

tsunamis,El Nino,and volcanic eruptions

Explanation:

all short term.

8 0
3 years ago
Read 2 more answers
Two protons are 9.261 fm apart. (1 fm= 1 femtometer = 1 x 10^-15 m.) What is the ratio of the electric force to the gravitationa
Strike441 [17]

Answer:

1.24\times 10^{36}

Explanation:

q = magnitude of charge on each proton = 1.6 x 10⁻¹⁹ C

m = mass of each proton = 1.67 x 10⁻²⁷ kg

r = distance between the two protons = 1 x 10⁻¹⁵ m

Electric force between the two protons is given as

F_{e} = \frac{kq^{2}}{r^{2}}

F_{e} = \frac{(9\times 10^{9})(1.6\times 10^{-19})^{2}}{(1\times 10^{-15})^{2}}

F_{e} = 230.4 N

Gravitational force between the two protons is given as

F_{g} = \frac{Gm^{2}}{r^{2}}

F_{g} = \frac{(6.67\times 10^{-11})(1.67\times 10^{-27})^{2}}{(1\times 10^{-15})^{2}}

F_{g} = 1.86\times 10^{-34} N

Ratio is given as

Ratio =\frac{F_{e}}{F_{g}}

Ratio =\frac{230.4}{1.86\times 10^{-34}}

Ratio = 1.24\times 10^{36}

3 0
3 years ago
Read 2 more answers
A weather reporter describes a large area of air that has the same temperature and air pressure . What is the reporter describin
Novay_Z [31]

<u>Answer:</u>

<u>air mass</u>

<u>Explanation:</u>

Remember, the weather of a particular location is often a description of the atmospheric condition of that particular place.

Indeed, the definition of an air mass fits the reporter's description above. As the name implies, <u>a particular air mass would represent the temperature characteristics of a particular area that has a constant or the same temperature and air pressure.</u>

5 0
3 years ago
A tennis ball with a speed of 15.7 m/s is moving perpendicular to a wall. After striking the wall, the ball rebounds in the oppo
LiRa [457]

Answer:

-3044.848m/s^2

Explanation:

Initial velocity = 15.7 m/s (u)

Final velocity = -14.444 m/s (v) velocity after striking moving opposite direction.

Time = 0.0099 s

Average acceleration :

change in velocity/ total time

= V - U/t

= -14.444 m/s - 15.7 m/s/0.0099 s

= -30.144/0.0099 s

= -3044.848m/s^2

8 0
3 years ago
.A cart rolling down an incline for 5.0 seconds has an acceleration of 1.6 m/s2. If the cart has a beginning speed of 2.0 m/s, a
Ilia_Sergeevich [38]

Use the formula,

\Delta x=v_it+\dfrac12at^2

where \Delta x is the cart's displacement (from the origin), v_i is its initial speed, a is its acceleration, and t is time.

\Delta x=\left(2.0\dfrac{\rm m}{\rm s}\right)(5.0\,\mathrm s)+\dfrac12\left(1.6\dfrac{\rm m}{\mathrm s^2}\right)(5.0\,\mathrm s)^2

\implies\boxed{\Delta x=30\,\mathrm m}

Alternatively, since acceleration is constant, we have

\dfrac{v_f+v_i}2=\dfrac{\Delta x}t

That is, we have these two equivalent expressions for average velocity, where v_f is the cart's final velocity. Solve for \Delta x:

\dfrac{10\frac{\rm m}{\rm s}+2.0\frac{\rm m}{\rm s}}2=\dfrac{\Delta x}{5.0\,\mathrm s}

\implies\boxed{\Delta x=30\,\mathrm m}

8 0
3 years ago
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