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3 years ago

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Which of the following is true regarding mixtures? a. One substance not combined with any other substances. b. Two or more subst

ances physically mixed and can be separated. c. Two or more substances that are impossible to separate d. One substance that forms a compound alone.

1 answer:

Brut [27]3 years ago

3 0

Answer:

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Explanation:

szsdrgzsedg

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We divide the electromagnetic spectrum into six major categories of light. What are these 6 major categories

3241004551 [841]

Answer:

radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.

Explanation:

Electromagnetic waves are the waves which are created as the result of the electrical waves which are perpendicular to each other and also perpendicular to the direction of propagation.

Electromagnetic spectrum is range of the frequencies and their respective wavelengths of the various type of the electromagnetic radiation.

In order of the increasing frequency and the photon energy and the decreasing wavelength the spectrum are:

<u>radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays. </u>

5 0

4 years ago

Please help..................

worty [1.4K]

Answer:

PART A

In a solid

The attractive forces keep the particles together tightly enough so that the particles do not move past each other. ... In the solid the particles vibrate in place. Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container.

In a liquid

Particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.

A gas

The particles move rapidly in all directions, frequently colliding with each other and the side of the container. With an increase in temperature, the particles gain kinetic energy and move faster.

PART B

The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces. The more particles that hit the walls, the higher the pressure.

Explanation:

GOOD LUCK!!! :)

7 0

3 years ago

why can we use P=VI in the question electric bulb base generator is rated 220 volts and 100W when it is operated on 110v what wi

MrRissso [65]

Answer:

Correct answer: P₂ = 25 W

Explanation:

Given: voltage V₁ = 220 V, power P₁ = 100 W, V₂ = 110 V, P₂ = ?

The formula for calculating power is:

P = V · I

We will include in the story and ohm's law:

I = V/R

We will replace the current in the expression for power

P = V · V/R = V²/R ⇒ R = V²/P

We will first calculate the electrical resistance of the bulb which is a constant in the electrical circuit

R = V₁²/P₁ = 220²/ 100 = 48,400 / 100 = 484 Ω

Power consumption of bulb connected to 110 V is:

P₂ = V₂²/R = 110²/484 = 12,100/484 = 25 W

P₂ = 25 W

God is with you!!!

8 0

3 years ago

travels along a perfectly flat (no banking) circular track of radius 532 m. The car increases its speed at uniform rate of at ≡

sladkih [1.3K]

Answer:

<em>The coefficient of static friction = 0.392</em>

Explanation:

When the tire starts to skirt, The net force on the car is equal to the maximum friction.

F = μR................ Equation 1

R = mg.............. Equation 2

F = ma ............ Equation 3

Substituting equation 2 and 3 into Equation 1

ma = μmg.

a = μg

μ = a/g................................... Equation 4

Where F = frictional Force, μ = Coefficient of frictional force, R = normal reaction. a = total acceleration of the car. g = acceleration due to gravity.

<em>Note: The tangential acceleration is perpendicular to the radius. The total acceleration is</em>

a = √(a₁² + a₂²)........................ Equation 4

Where a₁ = tangential acceleration of the tire, a₂ = centripetal acceleration of the car.

a₁ = 2.96 m/s²

a₂ = v²/R..................... Equation 5

Where v = speed of the car = 36.1 m/s, R = radius of the circular part traveled by the car = 532 m

Substituting into equation 5

a₂ = 36.1²/532

a₂ = 1303.21/532

a₂ = 2.45 m/s².

Therefore,

a = √(2.45²+2.96²)

a = √(6.0025 + 8.7612)

a = √14.764

a = 3.84 m/s².

Substituting into equation 4

μ = 3.84/9.8

<em>μ = 0.392.</em>

<em>Thus the coefficient of static friction = 0.392</em>

<em></em>

5 0

3 years ago

How can the continuous addition of heat in a closed system cause it to explode?

VARVARA [1.3K]

Answer:

The heat builds pressure

Explanation:

Consider an ideal gas in a closed system (like a gas in a container: in this case, the volume of the gas is fixed). The ideal gas equation states that:

$pV=nRT$

where

p is the gas pressure

V is the gas volume

n is the number of moles of the gas

R is the gas constant

T is the gas temperature

If heat is added to the gas, its temperature T increases. n and R are constant, and V is constant as well (the container does not change its volume), so this means that the pressure of the gas, p, increases as well. The more heat is added, the more the temperature increases, the more the pressure increase: at some point, the pressure against the internal walls of the container will become so strong that the container will explode.

6 0

3 years ago

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