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vesna_86 [32]
3 years ago
15

Which would likely demagnetize a magnetized iron nail?

Physics
2 answers:
siniylev [52]3 years ago
6 0

Answer:

By heating or dropping

Explanation:

The magnetized iron nail becomes demagnetize by heating it or by dropping it frequently.

As we give energy by any manner, by heating or by dropping, the magnetic moments get disturbed and then the magnetic property becomes decreases.

Delicious77 [7]3 years ago
5 0
Dropping it on a hard surface. 
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A sky diver, with parachute unopened, falls 625 m in 15.0 s. Then she opens her parachute and falls another 362 m in 139 s. What
Jobisdone [24]

Answer:

v_{avg} = 6.41 m/s

Explanation:

Average velocity is defined as the ratio of total displacement of the motion and total time taken in that motion

here we know that initially the sky diver drops without opening parachute by total displacement 625 m

then she open her parachute and drop another 362 m

so first it took time t = 15 s to drop without open parachute

then it took t = 139 s to drop next displacement

so here total displacement is given as

d = 625 m + 362 m

total time is given as

t = 15 s + 139 s

so average velocity is given as

v_{avg} = \frac{625 + 362}{15 + 139}

v_{avg} = 6.41 m/s

4 0
3 years ago
The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glas
DochEvi [55]

Answer:

b. 3 times

Explanation:

Lets take

Coefficient for ordinary glass = α₁

Coefficient for pyrex glass = α₂

 Given that α₁ = 3 α₂

Initial length of both glasses are equal = L

Change in the temperature is also same .= ΔT

We know that change in the length  given as

ΔL =  L α ΔT

Therefore

\dfrac{\Delta L_1}{\Delta L_2}=\dfrac{L\alpha_1\Delta T}{L\alpha_2\Delta T}

\dfrac{\Delta L_1}{\Delta L_2}=\dfrac{3\alpha_2}{\alpha_2}

ΔL₁ = 3ΔL₂

Therefore change in the length of original glass is three time of pyrex glass.

b. 3 times

6 0
3 years ago
Please help fill in the blank Earth’s axis passes through the (blank) and south poles.
LuckyWell [14K]

Answer:

North

Explanation:

Have a nice day :)

7 0
3 years ago
If lebron james has a vertical leap of 1.29m, what is his takeoff speed?
BlackZzzverrR [31]
<span>v=u+at</span> <span>
0=5.0283−9.8×t</span><span>
t=0.5130sec</span><span>
Total time = 2t = 1.0261 sec</span>
3 0
3 years ago
Read 2 more answers
In class, we read an article about "Absolute Zero". Using what you know about particles/molecule motion, choose the option that
IgorC [24]

Answer:

Absolute zero is where the particles/molecules are not moving at all, meaning that there is no heat.

This means that the answer is:

1. All particles are moving and this movement allows us to measure the thermal energy of an object or substance. If the particles were able to completely stop moving this would be called reaching absolute zero.

5 0
2 years ago
Read 2 more answers
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