CHEMISTRY MIDDLE SCHOOL

Define transparent ,translucent ,opaque materials?

Answers

Answer 1
Answer:

A transparent material is a material that

allows you to see right through it.

For example, glass is usually a transparent material.

A translucent material is a material that allows

you to see light, but it's distorted.

For example, tracing paper is a translucent material.

If a material is opaque, it blocks light from going through them.

Answer 2
Answer: Transparent - when light is in context with transparent materials almost all of the the light is allowed to go through these materials.
Ex: glass

Translucent- materials that do not allow light to pass through easily.
Ex: tissue paper

Opaque- materials that allow no light to go through them .
Ex: wood

Related Questions

MIDDLE SCHOOL

The amount of heat needed to change 1 gram of a solid to 1 gram of a liquid at constant temperature is called 1. vaporization

2. Sublimation

3. fusion

4. fission

Answers

The process of changing solid to liquid is known as fusion
I believe the answer would be fusion!
MIDDLE SCHOOL

Why does the dime transfer less momentum?

Answers

Answer:

This because the mass of the dime is very less = 2.268 grams only

Explanation:

Momentum : It is product of mass and velocity of the object.The affect of momentum can be observed by the force exerted . Greater the change in momentum, greater the force exerted by the object.

The formula of momentum(p) is :

Momentum depends upon :

1. Mass = Greater the mass of the object , greater the momentum . For example : you get more hurt by a heavy stone then a light ball when both hit you with the same velocity.

2. Velocity = Momentum of the object with more velocity is more. This application is used by the cricketers. While catching the ball , the fielder pushes his hand away. By doing this he decreases the velocity of the object. Hence the momentum decrease and the ball comes to catcher's hand easily.

The mass of dime = 2.26 gram So it has less momentum because of less mass.

Hence the force exerted or the momentum transferred by the Dime is very low .

HIGH SCHOOL

Which statement is true about the electromagnetic spectrum? -The visible spectrum includes radio waves, light, and gamma rays.



-Same wavelengths of light correspond to different colors.



-It contains a spectrum of visible light plus a wide array of nonvisible forms of radiation.



-The waves travel at a speed of 2.998 × 105 m/s.

Answers

The statement that tells a fact about the electromagnetic spectrum is the third option. Electromagnetic spectrum contains a spectrum of visible light and a wide array of non-visible forms of radiation. Electromagnetic spectrum is a common term for all frequencies and extended wavelengths of electromagnetic radiation or photons.
MIDDLE SCHOOL

Where do babies come from

Answers

Answer:

Babies come from when your mom and dad have something called intercourse and then anywhere from 8-10 months after that a baby comes out of the mothers vestibule which is the opening of their vj.

Explanation:

Look in google for more specific information but it comes from a mother 
hahahaha
HIGH SCHOOL

What types of properties do metalloids display, and where are they found on the periodic table?

Answers

Answer:

Metalloids can conduct heat and electricity, are deductible and malleable, and gain electrons when bonding. However, they are not as good as metals while they are better than no metals as conductance.

They can be found in the periodic table in the edge of non-metals and metals. In groups 13 to 17.

Explanation:

Metalloids are a type of chemical element characterized by being the elements between non-metal and metal elements. They also have conductant properties even though they are not as good as the ones from metals. They can be found in the periodic very easily because they are the limit that separates metals from non-metals. Examples of these elements are boron, silicon, germanium, arsenic, and antimony.

They show the properties in between the metal and non-metals.
MIDDLE SCHOOL

Which property of an element determines its position in the activity series? Atomic mass
Atomic radius
Reactivity
Solubility in water

Answers

Answer: Option (c) is the correct answer.

Explanation:

An activity series is defined as the series that shows metals arranged in decreasing order according to their reactivity.

Atomic mass is the sum of total number of protons and neutrons present in an atom.

Atomic radius is defined as the distance from the center of the nucleus to the outer most shell. Larger is the size of an atom, greater will be its atomic radius.

Reactivity is the ability of an atom to readily combine or react with a substance in order to gain stability.

Solubility is water means whether a compound or molecule dissociate into ions or not if dissolved in water.

Therefore, we can conclude that reactivity is the property of an element determines its position in the activity series.

Answer:

Reactivity.

Explanation:

The activity series is used to determine, for example, if a single displacement reaction occurs, and that depends on the activity of the ion of an element.

Hope this helped!

HIGH SCHOOL

Why are most fertilizers rich in nitrogen and phosphorous? A) To increase the amount of nitrogen and phosphorous in the soil, which are essential for soil texture.
B) To increase the amount of nitrogen and phosphorous in the soil, which are essential for the water retention capacity of soil.
C) To replenish nitrogen and phosphorous in the soil, which are most essential for plant growth.

Answers

Most fertilizers are rich in nitrogen and phosphorous because they have to replenish nitrogen and phosphorous in the soil, which are essential for plant growth. If they didn't have this, the soil would have to wait fro another cycle and this would hinder plant growth. The correct answer is C. 

Answer:

The answer is C. To replenish nitrogen and phosphorous in the soil, which are most essential for plant growth.

Explanation:

< Sarah >

COLLEGE

Value of Δ H ∘ rxn for the equation NH 3 ( g ) + 2 O 2 ( g ) ⟶ HNO3 ( g ) + H 2 O ( g )

Answers

Answer: - 894.6 kJ/mol.

Explanation:

Hess law is states that the changes in enthalpies in a chemical reactions is independent of the pathway between the initial and final states.

∆H is the change in the sum of the internal energy of a system.

We are to find the Value of ΔH°(rxn) for the equation:

NH3 (g) + 2 O2 (g) ⟶ HNO3 (g) + H2O (g). ----------------------------------(**).

From the series of equations given;

==> 4NH3 (g) + 5O2 (g) -------->4 NO(g) + 6H2O (l). ∆H = -1166.0 kJ/mol.--------------------------------------(1).

===> 2NO(g) + O2 (g) ------> 2NO2 (g). ∆H = -116.2 kJ/mol.---------------(2).

===> 3NO2 (g) + H2O (l) ---------> 2HNO3 (aq) + NO (g). ∆H = -137.3 kJ/mol.-------------------------------------(3).

The first thing to do is to multiply equation (2) by 3. Also, multiply equation (3) by 2. This will give us equation (4) and (5) respectively.

6NO + 3 O2 ----------------> 6NO2. ∆H= 3 × (-116.2 kJ/mol) = -348.6 kJ/mol. ------------------------------------(4).

6NO2 + 2 H2O ----------------> 4HNO3 + 2 NO. ∆H= 2 × (-137.3kj/mol) = -274.6 kJ/mol ---------------------------(5).

Next, add equations (4) and (5) to give;

4NO +3O2 +2H2O -------------> 4HNO3. ∆H = -623.2 kJ/mol. -----(6).

Add this equation to the equation (1) from above, we have;

4NH3 + 8O2 --------------> 4HNO3 + 4H2O. ∆H= -1789.2 kJ/mol. --------(7).

Then, divide the equation (7) above by 2 to give us back the equation (**).

NH3 (g) + 2 O2 (g) ⟶ HNO3 (g) + H2O (g). ∆H= -894.6 kJ/mol.

Δ H^∘ (rxn)= - 894.6 kJ/mol.

MIDDLE SCHOOL

ANSWER ASAP! WILL GIVE BRAINLIEST! While testing the air bags in a car, engineers observed that the compressed air in the bags expanded on impact. Which of the following best justifies the type of changes taking place during the process?

1. Physical change because heat of combustion is a chemical property.
2. Chemical change because heat of combustion is a chemical property.
3. Physical change because compressibility is a physical property.
4.Chemical change because compressibility is a physical property.

Answers

Answer:

. Physical change because compressibility is a physical property.

Explanation:

I took a test with this in it and this was right.

Answer:

C

Explanation:

the answer is c because compressibility is a physical property

Random Questions
In this excerpt from Anita Desai’s short story “Games at Twilight,” which lines suggest that the children had completely forgotten about Ravi? With a whimper he burst through the crack, fell on his knees, got up, and stumbled on stiff, benumbed legs across the shadowy yard, crying heartily by the time he reached the veranda so that when he flung himself at the white pillar and bawled, “Den! Den! Den!” his voice broke with rage and pity at the disgrace of it all, and he felt himself flooded with tears and misery. Out on the lawn, the children stopped chanting. They all turned to stare at him in amazement. Their faces were pale and triangular in the dusk. The trees and bushes around them stood inky and sepulchral, spilling long shadows across them. They stared, wondering at his reappearance, his passion, his wild animal howling. Their mother rose from her basket chair and came toward him, worried, annoyed, saying, “Stop it, stop it, Ravi. Don’t be a baby. Have you hurt yourself?” Seeing him attended to, the children went back to clasping their hands and chanting, “The grass is green, the rose is red. . . .” But Ravi would not let them. He tore himself out of his mother’s grasp and pounded across the lawn into their midst, charging at them with his head lowered so that they scattered in surprise. “I won, I won, I won,” he bawled, shaking his head so that the big tears flew. “Raghu didn’t find me. I won, I won——” It took them a minute to grasp what he was saying, even who he was. They had quite forgotten him. Raghu had found all the others long ago. There had been a fight about who was to be It next. It had been so fierce that their mother had emerged from her bath and made them change to another game. Then they had played another and another. Broken mulberries from the tree and eaten them. Helped the driver wash the car when their father returned from work. Helped the gardener water the beds till he roared at them and swore he would complain to their parents. The parents had come out, taken up their positions on the cane chairs. They had begun to play again, sing and chant. All this time no one had remembered Ravi. Having disappeared from the scene, he had disappeared from their minds. Clean.