indica el mecanismo de propagacion del calor en un liquido , gas , solido , vacio

Answer:

7.5 m

Explanation:

Answer:

No Lo se :v esque estoy enferma del

Answer:

Mostly real

Explanation:

Concave mirrors can have real images.

“ If the object is further away from the mirror than the focal point, the image will be upside-down and real meaning that the image appears on the same side of the mirror as the object.”

The image produced by a concave mirror is  virtual or real.

When a hollow sphere's inside surface serves as the reflecting surface and the cut part's outside is painted, the result is a mirror. The term "concave mirror" refers to this kind of mirror.

Concave mirrors have certain characteristics.

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Answer:

Aerobic exercise includes?

(C) All activities that make you tired and short of breathe.

2. Which choice is an intense exercise that involve short burst of activity in which the muscles worked so hard that they produce energy without using energy?

(B) anaerobic exercise

Explanation:

Answer:

Explanation:I don't say you have to mark my ans as brainliest but if you think it has really helped you plz don't forget to thank me ...

Answer:

b.  1.0 × [tex]10^{-2}[/tex] m

Explanation:

The wavelength of a wave is the distance between successive crests or troughs. It is measured in meters, and related to velocity and frequency of the wave by:

  v = fλ

Where v is the velocity, f frequency and λ is the wavelength of the wave. Given that; f = 1.5× [tex]10^{5}[/tex] Hz and v = 1.5 × [tex]10^{3}[/tex], then:

            λ = [tex]\frac{v}{f}[/tex]

               = [tex]\frac{1.5*10^{3} }{1.5*10^{5} }[/tex]

               = 1.0 × [tex]10^{-2}[/tex] m

The wavelength, λ, of the wave is  1.0 × [tex]10^{-2}[/tex] m.

Answer: it is located over Ellesmere Island, Canada

Explanation

it is now drifting away from North America and toward Siberia.

Answer:ellesmere island, Canada

Answer:

Thorium 227 (also known as Radioactinium)

Answer:

a. 165.5 V

b. 7.78 A

Explanation:

Here is the complete question

The RMS potential difference of an AC household outlet is 117 V. a) What is the maximum potential difference across a lamp connected to the outlet? b) If the RMS current through the lamp is 5.5 A, what is the maximun current through the lamp.

Solution

a. The maximum potential difference across the lamp V₀ = √2V₁ where V₁ = rms value of potential difference = 117 V

V₀ = √2V₁ = √2 × 117 V = 165.5 V

b. The maximum current through the lamp I₀ = √2I₁ where I₁ = rms value of current = 5.5 A

V₀ = √2V₁ = √2 × 5.5 A = 7.78 A

Answer:

conduction is the correct answer

Answer:

C

Explanation:

Answer  A: A surface wave is a wave that travels along the surface of a medium.

Answer B, C: Electromagnetic waves are waves that have no medium to travel whereas mechanical waves need a medium for its transmission.

Answer D: The sentence in the answer D does not fit to the blank in the definition ( of the question )

......

Hope this answer can help you.

Answer:

33.33%

Explanation:

take efficiency =power output/power input multiply by 100%

Answer:

02-ba=_4

Explanation:

Explanation:

In short, when we switch off a branch, the remaining branch still forms a complete circuit with the battery, so electricity still pass through the remaining branch.

Technically speaking, the voltage in each branch is the same, and the resistance of the light bulb remains unchanged (neglect effect of temp.) by V=IR, the current should remain unchanged after switching off the other branch.

Answer:

5000 W

Explanation:

you are technically correct, but the question is asking for units in Watts

Recall that Power rating is the energy per unit time

= Energy ÷ Time

= 300,000 ÷ 60

= 5000 j/s

but we are told that the unit is a single letter, and recall that joules/s = watts

hence

5000j/s = 5000 W

edit: typo. Missing a zero from answer

Answer:Electricity is the flow of electrons. All matter is made up of atoms, and an atom has a center, called a nucleus. When electrons are "lost" from an atom, the free movement of these electrons constitutes an electric current. Electricity is a basic part of nature and it is one of our most widely used forms of energy.

Explanation:

Answer:

Explanation:

The given statement is true as molecules in gas are far away from each other due to weak forces of attraction.

Forces of attraction is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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Answer:Newton used these laws to explain and explore the motion of physical objects and systems, Newton's three laws are: If an object experiences no net force, its velocity will remain constant. The object is either at rest and the velocity is zero or it moves in a straight line with a constant speed.

Explanation:

Answer:

Newton's second law

Explanation:

The greater the mass of an object, the less it will accelerate when a given force is applied.

Answer:

E = 0.45 kN/C

Explanation:

From; the question, we can opine that the electric field inside the hollow sphere as a result of the  charge at the surface is zero.

Using the equation:

[tex]\mathbf{E = kq/r^2}[/tex]  to determine the magnitude of the electric field with the radius 1.0 cm from the point charge.

where ;

constant k = [tex]8.98*10^9[/tex]

point charge  q = 5.0 pC = 5.0 × 10⁻¹²; we have :

[tex]\mathbf{E = kq/r^2}[/tex]

[tex]\mathbf{E =\dfrac{8.98*10^9*5*10^{-12}}{1.0^2}}[/tex]

E = 0.45 kN/C

Answer:

I will answer in English, and i will give some representation for each case:

We have a = 6m and b = 8m.

If they are perpendicular, we have that:

a = (6m, 0) b = (0, 8m)

The adition is:

a + b = (6m, 8m).

If they are parallel, we have;

a = (6m, 0)

b = (8m, 0)

a + b = (6m + 8m, 0) = (14m, 0 )

If they are parallel but opposite:

a = (6m, 0)

b = (-8m, 0)

a + b = (6m - 8m,0) = (-2m, 0)

Answer:

W = 12 kJ

Explanation:

We have,

Voltage of a battery is 12 V

Charge supplied by the battery is 1000 C

It is assumed to find the work is done by the battery in moving the charge. The work done is given in terms of voltage as :

[tex]W=qV\\\\W=1000\times 12\\\\W=12000\ J[/tex]

or

W = 12 kJ

So, the work of 12 kJ is done by battery in moving charges.

Answer:

p1 = 9 watt

Explanation:

first find the current :

i = V/r1 +r2 = 12 / (1+3) = 3 A

Next, find the voltage in the 1 ohm resistor:

V1 = r1 * i = 1 * 3 = 3 volt

Now calculate power in the 1 ohm resistor :

P1 = i * V1 = 3 * 3 = 9 watt

Answer:

Actually, the motion of the stars and galaxies tell us about the origin of the Universe.

You see, the light frequency of the waves we receive tell us that the galaxies

are moving away from us, and the more distant they are, the go away faster.

Now, in the outer space there's no friction at such, and according to Newton's First Law, an object won't change its direction and velocity unless an external force act on that object. That means this motion of the galaxies is due to an initial force, like an explosion, which occasionate the seperation between galaxies, that's why the Big Bang Theory exists.

So, that's how the motion of stars and galaxis tell us something about the origin of all.

Answer:

Filiberto experimenta una deceleración de [tex]2\,\frac{m}{s^{2}}[/tex].

Explanation:

(The problem was written in Spanish. Hence, explanation will be held in Spanish).

Asúmase que Filiberto se distrae por 2 segundos, puesto que un par equivale a dos, y que el vehículo experimenta un aceleración constante. La deceleración experimentada por el vehículo se deriva de la siguiente fórmula:

[tex]a = \frac{v-v_{o}}{\Delta t}[/tex]

[tex]a = \frac{40\,\frac{m}{s}-90\,\frac{m}{s} }{2\,s}[/tex]

[tex]a = -25\,\frac{m}{s^{2}}[/tex]

Filiberto experimenta una deceleración de [tex]2\,\frac{m}{s^{2}}[/tex].

Answer:

The cartilage is the structure that reduces friction between joints.

Explanation:

Cartilage is the tissue between the bone joints. They are composed of several membranes and cellular groups. One of them called synovial membrane which provides lubricant to the edges of tissue that are touched by the bones. Reducing the friction and absorbing it so the body can move without obstacles.

Answer:

true

Explanation:

All three types of ionising radiation have the potential to make cells become cancerous or even kill them completely.

Answer: 27 m/s

Explanation:

vo = 15 m/s

a = 2 m/s^2

t = 6s

v = vo + at

v = 15 + 2(6)

v = 15 + 12

v = 27 m/s

Answer:

Home energy bill/electricity bill is measured in Kilowatt hours.

Water bill is measured in gallons & gas units is measured in BTUs.

hope it helps!