A small electric motor produces 5W of mechanical power.what is this power in:

natima [27]

${\underbrace{\sf{PHOTO-ELECTRIC~EFFECT }}}$

The photoelectric effect is a phenomenon in which electrons are ejected from the surface of a metal when light is incident on it. These ejected electrons are called photoelectrons. It is important to note that the emission of photoelectrons and the kinetic energy of the ejected photoelectrons is dependent on the frequency of the light that is incident on the metal’s surface.

5 0

3 years ago

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Which statement was part of an initial draft of the Declaration of Independence, but not part of the final version of the Declar

aleksandrvk [35]

The correct option is B.
The idea that slavery should be abolished in America was part of the initial draft of the Declaration of independence but it was not included as part of the final version of the document, because some Americans were of the opinion that such move might hurt the economy of the country.

3 0

3 years ago

A long, rigid conductor, lying along an x axis, carries a current of 4.99 A in the negative x direction. A magnetic field is pre

Tcecarenko [31]

Answer with Explanation:

We are given that

Current in conductor=I=4.99 A (-x direction)

Magnetic field=B= $3.72\hat{i}+8.72x^2\hat{j}mT=(3.72i+8.72x^2j)\times 10^{-3}$

(1mT= $10^{-3} T$ )

x(in m) and B (in mT)

Length of conductor is given in negative x- direction

$\vec{L}=-x\hat{i}$

$dL=-dx\hat{i}$

Force on current carrying conductor is given by

$F=I(L\times B)$

$dF=I(dL\times B)$

Integrating on both sides then we get

$\vec{F}=\int_{1.41}^{2.77}(4.99)(-dx\hat{i}\times (3.72\hat{i}+8.72x^2\hat{j}))\times 10^{-3}$

$\vec{F}=-\int_{1.41}^{2.77}(4.99\times 10^{-3})\cdot 8.72(x^2\hat{k})dx$ ( $i\times i=0, i\times j=k$

$\vec{F}=-(4.99\times 10^{-3}\times 8.72)[\frac{x^3\hat{k}}{3}]^{2.77}_{1.41}$

$\vec{F}=-\frac{(4.99\times 10^{-3}\cdot 8.72)}{3}((2.77)^3-(1.41)^3)\hat{k}$

$\vec{F}=-0.268 \hat{k} N$

a. x- component of force=0

b.y- component of force=0

c.z- component of force=-0.268 N

5 0

3 years ago

In a catapult, energy is transferred into useful kinetic energy stores what store is the energy in when it is in the catapult

gregori [183]

Explanation:

In a catapult, Initially, energy is stored in the form of potential energy which is later converted into kinetic energy.

Potential energy can be stored in the form of elastic potential energy in the case of elastic. It suddenly releases the energy to propel the object into the air.

5 0

3 years ago

If car A is at 40km/h and car B is at 10km/h in the opposite direction, what is the velocity of the car A relative to the car B?

Olin [163]

Explanation:

The velocity of car A relative to car B is (10km/h+40km/h)=50km/h

7 0

3 years ago