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vladimir2022 [97]
3 years ago
8

Explain two ways of magnetising an object​

Physics
1 answer:
Nina [5.8K]3 years ago
5 0

Answer:

There are two methods generally used to magnetize permanent magnets: static magnetization and pulse magnetization.

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Which is the momentum of a 100 kilogram boulder rolling south down a hill at a velocity of 5 meters per second
adell [148]
P = m * v
P = 100 * 5 Kg-m/s towards south
P = 500 Kg-m/s towards south

In short, your answer would be 500 Kg-m/s towards south

Hope this helps!
6 0
3 years ago
A fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called
ElenaW [278]

A fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called speed density type of system.

<h3>What is speed density fuel injection system?</h3>

Speed density fuel injection system is a fuel delivery method.

This system relies on a combination of sensor and an intake air temperature sensor to measure the amount (or mass) of air entering the engine.

Thus, a fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called speed density type of system.

Learn more about speed density here: brainly.com/question/26024294

7 0
3 years ago
It has been suggested that a heat engine could be developed that made use of the fact that the temperature several hundred meter
lesantik [10]

Answer:

efficiency = 5.4%

Explanation:

Efficiency of heat engine is given as

\eta = \frac{W}{Q_{in}}

now we will have

W = Q_1 - Q_2

so we will have

\eta = 1 - \frac{Q_2}{Q_1}

now we know that

\frac{Q_2}{Q_1} = \frac{T_2}{T_1}

so we have

\eta = 1 - \frac{T_2}{T_1}

\eta = 1 - \frac{273+6}{273+22}

\eta = 0.054

so efficiency is 5.4%

8 0
3 years ago
Imagine a planet 15 light-years away from Earth that is inhabitable by humans like us they have developed a very powerful telesc
In-s [12.5K]
S defined by the International Astronomical Union<span> (IAU), a light-year is the distance that </span>light travels in vacuum<span> in one </span>Julian year<span> (365.25 days). so if a planet </span><span>15 light-years away from Earth that is inhabitable by humans like us they have developed a very powerful telescope allowing them see what is happening on Earth if they look to the telescope today, they will see 15 years ago in the earth</span>
5 0
3 years ago
What role does activation energy play in an exothermic reaction?
Nuetrik [128]

Answer A material that decreases the rate of a reaction. The amount of energy that reactants must absorb before a chemical reaction will start also called free energy of activation. What role does activation energy pay in chemical reactions? Activation energy is the energy absorbed before it can start a chemical reaction.

Explanation:

3 0
3 years ago
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