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3 years ago

The ratio of output power to input power, in percent, is called

1 answer:

3 0

That ratio is called"efficiency". It doesn't need to be a percent.
It can just as well be a fraction or a decimal number.

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Most of the currents identified have a circular shape. This is because as the air and water move between the equator to the pole

Morgarella [4.7K]

I believe it is true . Somebody correct me if I’m wrong!

5 0

2 years ago

1. If the strength of the magnetic field at B is 3 units, the strength of the magnetic field at A is _____.

Ymorist [56]

<h3><u>Answer;</u></h3>

C. 12 units

<h3><u>Explanation;</u></h3>

If the strength of the magnetic field at B is 3 units, the strength of the magnetic field at A is 12 units
Magnetic field strength is one of two ways that the intensity of a magnetic field can be expressed.
<em><u>The strength of the field is inversely proportional to the square of the distance from the source. This means that If the distance between two points in magnetic filed is doubled the magnetic force between them will fall to a quarter of the initial value. </u></em>
<em><u>On the other hand, if the distance between two magnets is halved the magnetic force between them will increase to four times the initial value.</u></em>

6 0

3 years ago

If The density of this stainless steel is7.85 g/cm3,specific heatis 0.5 J/g.K, melting pointis 1673K, heat of fusion s0.260J/kg.

kodGreya [7K]

Answer:

$\Delta H=687.4 J$

Explanation:

Hello!

In this case, for this melting process, we can identify two sub-processes in order to take the stainless steel from solid to liquid:

1. Heat up from 298.15 K to 1673 K.

2. Undergo the phase transition.

Both process have an associated enthalpy as shown below:

$\Delta H_1=1g*0.5\frac{J}{g*K} (1673K-298.15K)=687.4J$

$\Delta H_2=0.001kg*\frac{0.260J}{kg} =0.00026J$

Therefore, the required heat is:

$\Delta H=\Delta H_1+\Delta H_2\\\\\Delta H=687.4J+0.00026J\\\\\Delta H=687.4J$

Notice the problem is not providing neither the mass or volume, that is why we assumed the mass is 1 g; however, it can be changed to the mass you are given.

Best regards!

4 0

3 years ago

What type of motion occurs when an object spends around and axis without altering its linear position?

ch4aika [34]

I believe it is called centripetal force <span />

7 0

3 years ago

Hi, pls help with this question. Thank you.

topjm [15]

Answer:

i: Gamma Rays

ii: Infrared

Explanation:

It just is:)

5 0

3 years ago