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UkoKoshka [18]
3 years ago
14

What is an item in which magnetic domains can be aligned and a magnetic field induced for a short period of time

Physics
2 answers:
dusya [7]3 years ago
6 0

Answer:temporary magnets

(soft magnets) retain their magnetic properties for a short time

example: paper clips and nails become magnetized by being near or rubbing against a magnet

Leto [7]3 years ago
3 0
I think an object such as an iron pipe could work
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Two birds collide in midair. Before the collision their combined momentum was 35kg•m/sto the east. What is their combined moment
katrin [286]

Answer:

b

Explanation:

8 0
3 years ago
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How can different objects interact when they are not even touching?
jeka94

Answer: Magnetic and gravitational force

Explanation: When a magnet and an iron nail are kept at a distance,the magnet attracts the nail without touching using magnetic force. In this example, the magnet and the nail are interacting.

The earth pulls the moon towards it and keeps it in orbit without touching it, using gravitational force. In this example,the moon and the earth are interacting.

PLEASE RATE 5 STARS AND VOTE AS BRAINLIEST:)

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3 0
4 years ago
A fan is to accelerate quiescent air to a velocity of 8 m/s at a rate of 9 m3 /s. determine the minimum power that must be suppl
ELEN [110]
Given:
ρ = 1.18 kg/m³, density of air
v = 8 m/s, flow velocity
Q = 9 m³/s, volumetric flow rate

The minimum power required (at 100% efficiency) is
\frac{1}{2} (8 \,  \frac{m}{s} )^{2}*(9 \,  \frac{m^{3}}{s} )*(1.18 \,  \frac{kg}{m^{3}}) =  339.84 \, W

The actual power will be higher because 100% efficiency is not possible.

Answer: 339.8 W (nearest tenth)
8 0
4 years ago
According to principle of conservation of energy, the total momentum of a system of masses in any direction remains constant unl
Sergeu [11.5K]
The principle of conservation of energy states that energy can neither be created nor destroyed, but can be changed from one form to another. The law of inertia on the other hand states that a body remains at a state of rest or motion on a straight line unless compelled by an external force. So i think that the answer is B, which is FALSE because the question is more related to the law of inertia(Newtons first law) than to the law of conservation of energy. Hope i helped.  
6 0
3 years ago
A piece of taffy slams into and sticks to another identical piece of taffy that is at rest. The momentum of the two pieces stuck
-Dominant- [34]

Answer:

C. 50%

Explanation:

Lets consider that the mass of taffy is m and its initial velocity is u and final velocity is v. Momentum is conserved so we can write it as,

mu = 2mv\\v = \frac{u}{2} \\

The initial kinetic energy = \frac{mu^{2} }{2}

As the Kinetic energy partly converted into heat.

The final kinetic energy = \frac{m(\frac{u}{2})^{2}  }{2} = \frac{mu^{2} }{4}

Change in the kinetic energy = \frac{mu^{2} }{2} - \frac{mu^{2} }{4} = \frac{mu^{2} }{4}

now we can determine the fraction of kinetic energy that has turned into heat

                           = \frac{Heat energy}{initial K.E} = \frac{\frac{mu^{2} }{4} }{\frac{mu^{2} }{2} }  = 1/2

                           = 50%

3 0
4 years ago
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