What can be proved from the given figure? ​

Answer:

The change in the mass of box = 0.01 kg

Volume of air in the polythene bag = Volume of air in the rigid box

Therefore, Volume of air in the box = 0.008 m^3

Now, Density = Mass/ Volume

=> Density = 0.01 / 0.008 = 1.25 Kg / m^3

Explanation:

I looked it up

Answer:

Warm colours are those with a yellow-ish or black undertone. Imagine how everything looks through your tinted sunglasses or on a beautiful day in autumn when the leaves are falling. The hints of yellow give these colours a sunny warmth, while those with more black mixed in appear darker and can seem more muted.

Explanation: The mantle is divided into several layers: the upper mantle, the transition zone, the lower mantle, and D” (D double-prime), the strange region where the mantle meets the outer core. The upper mantle extends from the crust to a depth of about 410 kilometers (255 miles).

Answer:

In continuum mechanics, stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material.

Strain energy density functions (W) establish the relation between the amount of energy employed to deform a volume unit of a solid and imposed strain.

Explanation:

Stress, strain and strain-energy density is discussed below.

In physics and materials science, elasticity is the ability of a body to resist a distorting influence and to return to its original size and shape when that influence or force is removed

Given is to define stress and strain and establish the relation among energy, density stress and strain.

        [tex]$u = U/V =\int\limits^\epsilon_0 \, \sigma_{x} d\epsilon_{x}[/tex]

Therefore, stress, strain and strain-energy density is discussed above.

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Answer:

[tex]p = {i}^{2} r[/tex]

[tex]i = \sqrt{ \frac{p}{r} } [/tex]

P= VI

V= IR

Substitute eqn 1 into eqn 2

P= (IR) I

[tex]p = {i}^{2} r[/tex]

[tex] \frac{p}{r} = \frac{ {i}^{2}r }{r} [/tex]

[tex] {i}^{2} = \frac{p}{r} [/tex]

[tex]i = \sqrt{ \frac{p}{r} } [/tex]

The acceleration and velocity of the plane is 78.57 m/s² and 157.14 m/s respectively

To calculate the acceleration of the plane, we use the formula below.

Where:

From the question,

Given:

Substitute these values into equation 1

To calculate the velocity, we use the formula below.

Where:

From the question,

Given:

Substitute these values into equation 2

Hence, The acceleration and velocity of the plane is 78.57 m/s² and 157.14 m/s respectively.
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Answer:

500 Pascals or 500N/m²

Explanation:

Pressure = Force/Area

P= 200/0.4 = 500

Answer:

B

absorption

black colour absorbs colour

Answer:

I think it's absorption

Hope this helps ;)

Answer:

Soaps and detergents are made from long molecules that contain a head and tail the detergent molecules also help to make the washing process more effective by reducing the surface tension of the water. Surface tension is the force which helps a blob of water on a surface hold its shape and not spread out.

Answer:

Soaps and detergents are made from long molecules that contain a head and tail. ... The detergent molecules also help to make the washing process more effective by reducing the surface tension of the water. Surface tension is the force which helps a blob of water on a surface hold its shape and not spread out.

Explanation:

hello

Answer:

amount of force times the distance it moves an object: work

kind of force used to operate engines: steam

English unit of measuring work equal to moving one pound one foot: foot-pound

metric measurement of work equal to moving one Newton one meter: Newton-meter

kind of force that pulls things toward the center of the earth: force of gravity

force used when walking: muscular force

force used to turn a windmill: force of wind

Explanation:

I found the answers in quizlet

Answer:

im in the same class so here's your answer

Explanation:

Answer:

290 Hz

Explanation:

Resonance, in terms of physics and biology, describes the pitch and the vocals. The frequency of the first formant is 0.30 m.

Resonance has been the production of the phonation or the vocal that gets increased in intensity and timbre by the cavities that are filled out by the air as present in the vocal system with an open-closed tube.

From the graph, the frequency of the individual line is, calculated by dividing 1000 Hz with 7 sections shown in the graph as,

f = 1000 ÷ 7

= 142.85 Hz

Further, the frequency of the first formant is calculated as:

f' = 2f

= 2(142.85 Hz)

= 285.71 Hz

= 290 Hz

Now for the open-closed tube, the fundamental frequency is,

f = ν ÷ 4L

L = ν ÷ 4f

= 343 ÷ 4( 290 Hz)

= 0.30 m

Therefore, 0.30 m is the frequency of the first formant.

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Answer:

The direction of angular velocity and angular momentum are perpendicular to the plane of rotation. Using the right hand rule, the direction of both angular velocity and angular momentum is defined as the direction in which the thumb of your right hand points when you curl your fingers in the direction of rotation.

Explanation:

Hi there!

Recall the following:

[tex]V \text{ (Electric Potential Energy) } = \frac{kq_1q_2}{r}\\\\F_E = \frac{kq_1q_2}{r^2}[/tex]

k = Coulomb's Constant (Jm/C²)

q = Charge (C)
r = distance between charges (m)

To calculate the electric force between the two charges, we can simply divide by another 'r' (distance):

[tex]F_E = \frac{70}{0.049} = \boxed{1428.57 \mu J}[/tex]

Answer:

C

Explanation:

Basically force is given by the formula.

F= ma

Where m is mass of the body and 'a' is acceleration.

Here the time is not given, hence it is not possible to calculate acceleration, as acceleration is given by the formula

a= v/t

So most probably the question is wrong.

However if we take acceleration= 2m/s^2

Then F= ma= 50*2= 100N

However if the question was to find energy then it is sufficient to find kinetic energy as moving objects possess kinetic energy.kinetic energy is given by the formula:

KE= 1/2*m* v^2

I.e, KE= 1/2 * 50 * 2* 2

The current through each resistor in the circuit connection is non-zero.

Grounding in a circuit connection implies a point of zero volt. It is achieved in an electrical system when a part of current flow in the circuit is intentionally directed or connected to the earth.

As long as there is potential difference in a circuit, current will flow in the resistor. Grounding a circuit creates a potential difference between two points (low potential and high potential) in the circuit and consequently, current will flow across the resistors.

Thus, the current through each resistor is non-zero.

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Answer:

Resistor provides resistance to the flow of electric current in a circuit. It controls the amount of current in a circuit by acting as a barrier to the flow of electric charges

Explanation:

Answer:

22/2 = 11

Explanation:

A quotient means the result of a division problem. When it says the quotient of a and b, this means of "a divided by b". Remember to always go in the right order, because in division, order matters.

Therefore the quotient of 22 and 2 is equal to 11 is written: 22/2 = 11

Answer:

Brainliest pls

Explanation:

the playing of musical tones together in chords. 2: a pleasing arrangement of parts a harmony of colors. 3: agreement sense 1, accord The committee worked in harmony.

agreement; accord; harmonious relations. a consistent, orderly, or pleasing arrangement of parts; congruity. Music. any simultaneous combination of tones. the simultaneous combination of tones, especially when blended into chords pleasing to the ear; chordal structure, as distinguished from melody and rhythm.

What is harmony? What is the meaning of it.

Answer:

C, C is batteries, B is switch, A is bulb

The watermelon’s velocity right before it hits the ground is 12.52 m/s.

The principle of conservation of mechanical energy states that the total energy of an isolated system is always conserved.

P.E = K.E

mgh = ¹/₂mv²

gh = ¹/₂v²

v = √2gh

where;

The watermelon’s velocity right before it hits the ground is calculated as follows;

v = √(2 x 9.8 x 8)

v = 12.52 m/s

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Answer:

this kind of force is proportional directly to the speed of the object and inversely to the radius of the curved path. Therefore, Hence, the force becomes 2.25 times the original force.

Explanation:

The initial speed of the skier is 14 m/s.

The maximum height attained by the skier is 15 m.

The initial speed of the skier is determined by using the following kinematic equation.

[tex]K.E = mgh\\\\\frac{1}{2} mv^2 = mgh\\\\\frac{1}{2} v^2 = gh\\\\v^2 = 2gh\\\\v = \sqrt{2gh} \\\\v = \sqrt{2\times 9.8 \times 10} \\\\v = 14 \ m/s[/tex]

The maximum height attained by the skier is calculated as follows;

[tex]H = \frac{v^2 sin^2\theta}{2g} \\\\H = \frac{14^2 \times (sin45)^2}{2 \times 9.8} \\\\H = 5 \ m[/tex]

Thus, the maximum height attained by the skier is (10 + 5) = 15 m.

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Answer:

5seconds

Explanation:

because she was going through the same time

Answer:

Photosynthesis: the process where plants convert light energy into sugar, for food

Food chain: a series of organisms showing which organisms eat each other

Explanation:

(a) A conservative force is a type of force where the total work done in moving a particle between two points is independent of the path taken by the particle.

(b) Work-energy theorem sates that the work done on an object is equal to the change in the kinetic energy of the object.

A conservative force is a type of force where the total work done in moving a particle between two points is independent of the path taken by the particle.

The net work-done is zero, and can be mathematically expressed as follows;

ΔW = 0

This theorem relates the change in kinetic energy to work done on object.  The work-energy theorem sates that, the work done on an object is equal to the change in the kinetic energy of the object.

It can be mathematically expressed as follows;

W = ΔK.E

Where;

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Take "to the right" to be the positive direction. By conservation of momentum,

m₁v₁ + m₂v₂ = m₁(v')₁ + m₂(v')₂

where the v-s denote initial velocities and the v'-s denote final velocities. m₁ and m₂ are of course masses, but we're told that m₁ = m₂, so we can eliminate these factors altogether:

v₁ + v₂ = (v')₁ + (v')₂

We're given that v₁ = +4.0 m/s, (v₁)' = -1.5 m/s, and (v')₂ = +4.0 m/s.

Solve for v₂ :

v₁ + v₂ = (v')₁ + (v')₂

4.0 m/s + v₂ = -1.5 m/s + 4.0 m/s

⇒   v₂ = -1.5 m/s