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3 years ago

Describe the properties of gases

2 answers:

8 0

Gases have three characteristic properties:
(1) they are easy to compress,
(2) they expand to fill their containers, and
(3) they occupy far more space than the liquids or solids from which they form.

goblinko [34]3 years ago

3 0

Answer:

Gases has the following properties:

i) Gases are less dense than liquids and solids

ii) Gases molecules has large space between them so, they can be easily compressed

iii) Gases has indefinite shape and volume

iv) Gases can occupy all the space provided

v) Gases molecules has random motion and collisions

vi) When gases are heated their volume increases

vii) Gases can diffuse from one place to another due to the difference of concentration of molecules

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Parallel conducting wires carrying currents in the same direction repel each other.

S_A_V [24]

Answer:

False

Explanation:

The direction of magnetic field on a current carrying conductor can be determined by the Fleming's right hand rule where

The thumb represents the direction of motion
the index finger represents the direction of field.
The middle finger is the direction of induced current.

When two conductors carrying currents flowing in opposite direction, the magnetic field will be in the same direction hence they will repel.

When the currents in them flow in same direction, then it means the magnetic field will be opposition and there will be a force of attraction between the conductors.

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3 years ago

A cannonball is shot from the top of a 30

lyudmila [28]

Answer:

C) 19 m/s

Explanation:

The motion of the cannonball is a projectile motion, which consists of 2 independent motions:

- A uniform motion (constant velocity) along the horizontal direction

- A uniformly accelerated motion (constant acceleration) along the vertical direction

As a result, we have the following:

- The horizontal velocity of the cannonball remains constant during the motion, and it is given by

$v_x = u cos \theta$

where

u = 25 m/s is the initial velocity

$\theta=40^{\circ}$ is the angle

Substituting,

$v_x = (25)(cos 40^{\circ})=19 m/s$

- The vertical velocity keeps changing during the motion due to the acceleration of gravity. However, at the top of the trajectory, the vertical velocity is zero:

$v_y = 0$

This means that at the top of its path, the cannonball has only horizontal velocity, so its velocity is

C) 19 m/s

3 0

3 years ago

Which change will always result in an increase in the gravitational force between two objects? increasing the masses of the obje

abruzzese [7]

By definition, we have that the gravitational force is given by:

$F = \frac{G * m1 * m2}{r ^ 2}$

Where,

G: gravitational constant

m1: mass of object number 1

m2: mass of object number 2

r: distance between both objects.

Therefore, for the gravitational force to increase, the following conditions must be met:

1) Increase the mass of the objects so that the numerator of the equation is greater.

2) Decrease the distance between the objects so that the denominator of the equation is smaller.

Answer:

A change that will always result in an increase in the gravitational force between two objects is:

increasing the masses of the objects and decreasing the distance between the objects

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3 years ago

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f a stadium pays $11,000 for labor and $7,000 for parking, what would the stadium's parking revenue have to be if the stadium is

QveST [7]

Answer:

Explanation:

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3 years ago

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Properties of elements within a ______________on the periodic table change in a predictable way from one side of the table to th

Natalka [10]

Answer: Period

Explanation: Properties of elements within a period on the periodic table change in a predictable way from one side of the table to the other. A period in the periodic table is a horizontal row. All elements in a row have the same number of electron shells.

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3 years ago