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3 years ago

Why is the solar cycle said to have a period of 22 years, even though the sunspot cycle is only 11 years long?

1 answer:

5 0

Sunspots occur at two times in the solar cycle corresponding to the "NS" orientation of magnetic poles for a 1/2 cycle and an "SN" orientation for the other half.

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What happens to the inertia of an object of its mass is decreased?

Verizon [17]

<span>The inertia of an object increases if the mass is decreased. Inertia is the resistance of any physical object to a change in its state of motion or rest. It is represented numerically by an object's mass.</span>

3 0

4 years ago

According to Newton's Universal Law of Gravitation, when the distance between two interacting objects doubles, the gravitational

maksim [4K]

Answer:

<em>If the distance doubles, the gravitational force is divided by 4</em>

Explanation:

<u>Newton’s Universal Law of Gravitation </u>

Objects attract each other with a force that is proportional to their masses and inversely proportional to the square of the distance.

$\displaystyle F=G{\frac {m_{1}m_{2}}{r^{2}}}$

Where:

m1 = mass of object 1

m2 = mass of object 2

r = distance between the objects' center of masses

G = gravitational constant: 6.67\cdot 10^{-11}~Nw*m^2/Kg^2

If the distance between the interacting objects doubles to 2r, the new force F' is:

$\displaystyle F'=G{\frac {m_{1}m_{2}}{(2r)^{2}}}$

Operating:

$\displaystyle F'=\frac{1}{4}G{\frac {m_{1}m_{2}}{r^{2}}}$

Substituting the original value of F:

$\displaystyle F'=\frac{1}{4}F$

If the distance doubles, the gravitational force is divided by 4

5 0

3 years ago

1. Which object has the greatest inertia?

Digiron [165]

Answer:

1.c,2.c,3.a,4.d

Explanation:

the following answer are listed with there number

7 0

4 years ago

Help me with the following problem

Snezhnost [94]

The electric field at arbitrary point outside the sphere is determined as the E = σr³/k.

<h3>Electric field determined from Gauss law</h3>

The electric field of the surface is determined from Gauss law as shown below;

E ∫ds = Q/ε

E (4πr²) = Q/ε

E = Q/4πεr² . r

$E = \frac{Q R}{4\pi \varepsilon r^3}$

<h3>Electric field outside the sphere with dielectric with polarization</h3>

$P = \frac{\sigma}{E} \\\\E = \frac{\sigma}{P}$

$E = \frac{\sigma}{k/r^3} \\\\E = \frac{\sigma r^3}{k}$

where;

σ is dipole moment of atom of the metal
k is dielectric constant

Thus, the electric field at arbitrary point outside the sphere is determined as the E = σr³/k.

The complete question:

A metal sphere of radius R carries a total charge Q. outside the sphere is a dielectric with polarization p(f) k/r^3er. Determine the electric field at arbitrary point outside the sphere.

Learn more about electric field here: brainly.com/question/14372859

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6 0

2 years ago

Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.4 kg m^2 and an angular velocity of 7.2 rad/s. D

lakkis [162]

Answer:

I = 4.4 kg*m^2

Explanation:

As no external torques are present, total angular momentum must be conserved, as follows:

$L_{o} = L_{f} (1)$

The initial angular momentum of the two disks rotating separately, can be written as follows:

$L_{o} =I_{A} * \omega_{oA} + I_{B} * \omega_{oB} (2)$

Replacing by the givens, we get:

$L_{o} = 3.4kg*m2 * 7.2rad/s + I_{B} * (-9.8 rad/s) (3)$

The final angular momentum Lf, as the axis of rotation remains the same, is the product of the moment of inertia of both disks rotating as one, and the common angular velocity ωf, as follows:

$L_{f} = (I_{A} + I_{B}) *\omega_{f} (4)$

Replacing by the givens, we get:

$L_{f} = (3.4 kg*m2 + I_{B} ) * (-2.4 rad/s) (5)$

From (3) and (5), we can solve for IB, as follows:
IB = 4.4 kg*m2

7 0

3 years ago