To give a solution to this exercise, it is necessary to apply Gauss's magnetic law in which he proposes the magnetic flux through closed surface is zero.

Our data given are as follows:

Inward flux = 13Wb

Outward flux = 22Wb

Since the field of the second flow is directed OUT of the curved side we need to subtract the values, therefore,

Flux = 22-13

$Flux = 9Wb\Rightarrow INWARD.$

4 0

3 years ago

A block mass m (0.25 kg) is pressed against (but is not attached to) an ideal spring of force constant k (100 N/m) and negligibl

VMariaS [17]

Answer:

d. All the above choices are correct.

Explanation:

When a spring of spring constant k is compressed by distance x , the potential energy stored in it is equal to

E = 1/2 k x²

If spring constant is 2 k , potential energy stored

E = 1/2 2k x²

= k x²

which is twice the earlier potential energy.

In the first case , the energy of spring is imparted to box . The energy given to box is spent by frictional force due to which box comes to rest.

So energy of box acquired from spring = work done by frictional force.

So energy of box acquired from spring = F X d , F is frictional force , d is displacement .

In the second case ,

energy acquired by box becomes two times

Work done by frictional force will also become two times to put box at rest

So displacement will be two times ( because frictional force is constant )

so option a is correct .

option b is also correct .

Because kinetic energy of box will be twice as explained above .

So option d will be correct.

5 0

3 years ago

The emission line used for zinc determinations in atomic emission spectroscopy is 214 nm. If there are 9.00×1010 atoms of zinc e

KengaRu [80]

Answer:

$8.4\cdot 10^{-8}J$

Explanation:

The energy emitted by a single photon is given by:

$E=\frac{hc}{\lambda}$

where

h is the Planck constant

c is the speed of light

$\lambda$ is the wavelength of the photon

For the photons emitted by the zinc atoms,

$\lambda = 214 nm = 214 \cdot 10^{-9} m$

So the energy of a single photon emitted is

$E=\frac{(6.63\cdot 10^{-34})(3\cdot 10^8)}{214\cdot 10^{-9}}=9.3\cdot 10^{-19}J$

And since the number of atoms is

$N=9.0\cdot 10^{10}$

The total energy emitted will be

$E=NE_1 = (9.0\cdot 10^{10})(9.3\cdot 10^{-19})=8.4\cdot 10^{-8}J$

3 0

4 years ago

What system will carry the nutrients from the food to your cells in your body

Delvig [45]

The answer is Circulatory System

6 0

3 years ago

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What is dimension in physics?​

What is dimension in physics?