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3 years ago

Batteries are usually identified by their voltage.

Physics

1 answer:

Fynjy0 [20]3 years ago

7 0

Answer:

Explanation:

Given parameters:

Electrical energy = 18J

Quantity of charge Q = 12C

Unknown:

Voltage = ?

Solution:

The expression of electrical potential energy is given as:

Electrical potential energy = $\frac{1}{2}$ c v²

c is the quantity of charge

v is the voltage

18 = $\frac{1}{2}$ x 12 x v²

18 = 6v²

v² = 3

v = 1.7v

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Which state will not change shape or volume when moved to a different container?

grandymaker [24]

Ans: C) Solid

Explanation: We will look into different states

A) Liquid : In liquid state molecules are not very tightly bound to each other. So, they have no fixed shape . They take the shape of container in which they are kept.

B) Gas : In gaseous state molecules are very loosely bound so they have very less intermolecular forces so they have much more freedom of movement.So, it will be also not correct.

D) Plasma : In Plasma state approximately equal amount of positive or negative charges are there, although its a type of hot ionized gaseous state but but due its different properties then other gases it is considered the 'fourth' state. And it also can't maintain it's definite shape and volume.So we will eliminate that also.

C) Solid : Finally we are left with solid state. Here molecules are tightly bound to each other . So, it doesn't change its shape and volume when kept in different container.

So 'Solid' state is the correct choice.

Hope it helps!!!

7 0

3 years ago

I will fan and give 2 medals!!!!!!

Maksim231197 [3]

Corona

I. Rare gaseous envelope

II. Irregular pearly glow

III. Total solar eclipse

IV. Surrounds darkened moon

V. Caused by diffraction

Solar Prominence

I. loop shape

II. large bright gaseous

III. luminous hydrogen gas

IV. rises above chromospheres

V. anchored to surface (sun’s surface)

Solar Flare

I. Intense High-energy

II. Causes electromagnetic disruptions

III. In solar atmosphere

IV. Varies in brightness

V. Emits radiation

Sunspots

I. Surface dark spots

II. Strong magnetic fields

III. Solar magnetic storms

IV. Visible through telescope

V. Cooler than photospheres

I did this in class I got 100%

7 0

3 years ago

Astronomers have seen stars forming within a nebular cloud. As the nebular cloud condenses and its own gravitational attraction

Alenkasestr [34]

Nebular cloud should be the answer, but i believe nuclear fusion is the closest answer, because it fuses together to become a cloud

hope this helps

3 0

4 years ago

Read 2 more answers

A uniform disk is constrained to rotate about an axis passing through its center and perpendicular to the plane of the disk. If

katrin2010 [14]

A uniform disk is constrained to rotate about an axis passing through its center and perpendicular to the plane of the disk. If the disk starts from rest and is then brought in contact with a spinning rubber wheel, we observe that the disk gradually begins to rotate too. If after 35 s of contact with this spinning rubber wheel, the disk has an angular velocity of 4.0 rad/s, find the average angular acceleration that the disk experiences. (Assume the positive direction is in the initial direction of rotation of the disk. Indicate the direction with the sign of your answer.)

Assume after 35 s of contact with this spinning rubber wheel, the disk has an angular velocity of 11.0 rad/s.

Answer:

385 rad

Explanation:

The expression for the angular acceleration of a disk that is in contact with a spinning wheel can be given as:

$\alpha = \frac{\delta \omega}{\delta t}$