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3 years ago

Another name for a period is a family?

Physics

1 answer:

Zepler [3.9K]3 years ago

8 0

If you are referring to science, then you are correct. A period is also known as a family.

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A wire with a length of 150 m and a radius of 0.15 mm carries a current with a uniform current density of 2.8 x 10^7A/m^2. The c

Mrac [35]

Answer:

The current is 2.0 A.

(A) is correct option.

Explanation:

Given that,

Length = 150 m

Radius = 0.15 mm

Current density $J=2.8\times10^{7}\ A/m^2$

We need to calculate the current

Using formula of current density

$J = \dfrac{I}{A}$

$I=J\timesA$

Where, J = current density

A = area

I = current

Put the value into the formula

$I=2.8\times10^{7}\times\pi\times(0.15\times10^{-3})^2$

$I=1.97=2.0\ A$

Hence, The current is 2.0 A.

7 0

3 years ago

A satellite at a particular point along an elliptical orbit has a gravitational potential energy of 4700 MJ with respect to Eart

erastovalidia [21]

during satellite motion we know that total energy is always conserved

so here we will have

$KE_i + PE_i = KE_f + PE_f$

here we know that

$KE_i = 4800 MJ$

$PE_i = 4700 MJ$

now at other position

$PE_f = 6000 MJ$

now from above equation we have

$4800 +4700 = 6000 + KE$

now we have

$9500 = 6000 + KE$

$KE = 9500 - 6000 = 3500 MJ$

so its kinetic energy will be 3500 MJ

6 0

3 years ago

Wood burning in a fire is what property

nadezda [96]

Answer:

Answer=chemical

Explanation:

One of the chemical properties of carbon-based wood is that it has the ability to burn. Wood changes chemically to carbon dioxide when it burns and leaves a residue of ashes..

4 0

3 years ago

The mechanical energy of an object equals its

vova2212 [387]

B. Kinetic energy plus its potential energy.

7 0

3 years ago

A pitcher releases a fastball that moves toward home plate.

Vsevolod [243]

The two additional forces that act on the ball as it travels between the pitcher and the home plate are air resistance and gravity.

<h3>What are the forces that affect object in motion;</h3>

Air resistance: this is the force that oppose the motion of an object in air due to frictional force
Gravity: this is the force due to weight of the object and acts downwards.

The two additional forces that act on the ball as it travels between the pitcher and the home plate include:

Air resistance and
Gravitational force

<h3>How the forces affect the motion of the ball</h3>

Air resistance oppose the motion of the ball as it travels in air.
Gravity is the force due to weight of the ball and acts downwards.

Learn more about forces on object in motion here: brainly.com/question/10454047

5 0

2 years ago