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4 years ago

What is the rate at which electrical energy is converted into other forms of energy?

Physics

1 answer:

lapo4ka [179]4 years ago

5 0

Answer:

Electric power

Explanation:

Electric power is the rate at which electrical energy is converted to or from another form of energy, such as heat or light. The ratio of power to current is called the voltage.

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A 8.0×104kgspaceship is at rest in deep space. Its thrusters provide a force of 1200kN. The spaceship fires its thrusters for 20

Sladkaya [172]

Answer:

Time = 40 s

It will take the spaceship 40s to coast that distance.

Explanation:

Using the impulse momentum equation;

Impulse = change in momentum

Ft = m(∆v) ........1

Given;

Force F = 1200kN

time of action t = 20s

Mass of spaceship m = 8.0×10^4 kg

∆v = change in velocity

Substituting the values into equation 1;

1200kN × 20s =8.0×10^4 kg × ∆v

∆v = 1200000×20/80000

∆v = 300 m/s

Since it was initially at rest, V0 = 0

Final velocity V2 = 300 + 0

V2 = 300m/s

Time To travel 12 km,

Time = distance/speed

Distance = 12 km = 12000m

Speed = 300m/s

Time = 12000/300

Time = 40 s

It will take the spaceship 40s to coast that distance.

4 0

3 years ago

under normal conditions describe how increasing the temperature affects the solubility of a typical salt

Eduardwww [97]

For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

8 0

3 years ago

A beam of white light passes through a uniform thickness of air. If the intensity of the scattered light in the middle of the gr

k0ka [10]

This question is incomplete, the complete question is;

A beam of white light passes through a uniform thickness of air. If the intensity of the scattered light in the middle of the green part of the visible spectrum (λ=520nm) is I, find the intensity (in terms of I) of scattered light

a) In the middle of the red part of the spectrum (λ= 665 nm)

b) In the middle of the violet part of the spectrum (λ = 420 nm)

Answer:

a) the intensity of scattered light ( in terms of $I$ ) In the middle of the red part of the spectrum is 0.3739 $I$

b) the intensity of scattered light ( in terms of $I$ ) In the middle of the violet part of the spectrum is 2.3497 $I$

Explanation:

Given the data in the question,

the visible spectrum (λ=520nm) = $I$

we know that; intensity of scattered light is proportional to 1 / λ⁴

$I$ ∝ ( 1 / λ⁴ )

$I_R$ / $I$ = ( λ / λ $_R$ )⁴

As the middle of the green part of the visible spectrum λ is 520nm and middle of the red part of the spectrum λ $_R$ is 665 nm

we substitute

$I_R$ / $I$ = ( 520 / 665 )⁴

$I_R$ / $I$ = ( 0.781954887 )⁴

$I_R$ / $I$ = 0.3739

$I_R$ = 0.3739 $I$ { in terms of $I$ }

Therefore, the intensity of scattered light ( in terms of $I$ ) In the middle of the red part of the spectrum is 0.3739 $I$

$I_V$ / $I$ = ( λ / λ $_V$ )⁴

As the middle of the green part of the visible spectrum λ is 520nm and middle of the red part of the spectrum λ $_R$ is 420 nm

we substitute

$I_V$ / $I$ = ( 520 / 420 )⁴

$I_V$ / $I$ = ( 1.238095 )⁴

$I_V$ / $I$ = 2.3497

$I_V$ = 2.3497 $I$ { in terms of $I$ }

Therefore, the intensity of scattered light ( in terms of $I$ ) In the middle of the violet part of the spectrum is 2.3497 $I$

5 0

3 years ago

Read 2 more answers

The net force of an object moving with constant speed in a circular motion is in which direction

MrRa [10]

The force of an object is tangential to a circle.... Hope it helps

7 0

3 years ago

Under what conditions does q, the heat evolved or absorbed by the system in a physical or chemical process, equal the change in

Paladinen [302]

Answer: When $w=-P\Delta V$

Explanation:

According to first law of thermodynamics, energy can neither be created nor be destroyed. It can only be transformed from one form to another.

$\Delta H=\Delta E+P\Delta V$

$\Delta E=q+w$

$\Delta H$ = change in enthalpy

P = pressure

$\Delta V$ = change in volume

$\Delta E$ =Change in internal energy

q = heat absorbed or released

w = work done on or by the system

$\Delta H=q+w+P\Delta V$

Thus for $\Delta E=q+w$ , $w=-P\Delta V$

The heat evolved or absorbed by the system in a physical or chemical process, equal the change in enthalpy of the system when $w=-P\Delta V$

8 0

4 years ago