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3 years ago

What tends to happen to a sound wave as air temperature increases?

Chemistry

2 answers:

mr Goodwill [35]3 years ago

6 0

Answer:

Explanation:

Molecules at higher temperatures have more energy and can vibrate faster and allow sound waves to travel more quickly.

Darina [25.2K]3 years ago

4 0

Answer:

The wave's speed increases

Explanation:

Since the molecules vibrate faster when air temperature increases, sound waves can travel more quickly

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A factory produces their product at a rate of 102 kg/hr. How many lb/day of the product are produces? (453.6 g = 1 lb)

Softa [21]

102kg/hr * 1000g/hr * 1lb/453.6g * 24hr/day = 5404.0 lb/day

6 0

3 years ago

Question 25 for each chemical reaction in the table below, decide whether the highlighted reactant is a brønsted-lowry acid, a b

Alenkasestr [34]

According to the Bronsted-Lowry definitions, an acid is any substance that donates hydrogen ions; whereas, a base is any substance that accepts hydrogen ions.

In the first reaction, water is acting as an acid because it donates a hydrogen ions.

In the second reaction, water is acting as a base because it accepts a hydrogen ion.

In the third reaction, water is again donating a hydrogen ion so it is the acid.

In the fourth reaction, water is acting as a base by accepting the hydrogen ion from the ammonium ion.

6 0

2 years ago

Please help I don't have much time, I have 8 questions.

ValentinkaMS [17]

Answer:

1) The law of reflection states that the angles of incidence and reflection will always be congruent (option B)

2) If light passes from a gas to a liquid, it will slow down causing it to bend toward the source (option C).

3) Light travels fastest through a vacuum because particles are unobstructed since there are no media (option d).

4) Why do we see objects in color? Some wavelengths of light are reflected and some are absorbed (option d).

5) How are we able to see objects? Light is reflected (option d).

6) A ray of light passes from one medium to another and speeds up. As a result, it will bend away from the source of light (option c).

7) When light passes from one medium to another, it bends. What is this called? Refraction (option b).

8) Light hits a rough, textured surface. The beams split and reflect many different directions. This is called diffusion and will cause an image to clear (option b).

Explanation:

1) Light reflection consists of the bouncing of a beam of light against a polished surface, such as a mirror. This produces: an incident beam of light, a reflected beam of light, a point of incidence and two angles produced by the incident and reflected beam.

Since the angle of incidence is equal to the angle of reflection it can be said that both are congruent.

2) The passage of a ray of light from one medium to another is called refraction and involves a change in the speed and direction of the ray, due to the change in density from one medium to another.

The passage of light from a gaseous medium (less dense) to a liquid medium (more dense) produces a decrease in its speed and a shorter angle of refraction than that of incidence, so that the light is observed closer to the source.

3) The speed of light in a vacuum will always be higher because it does not depend on factors such as electricity or magnetism that get in its way, it is estimated to be near 300k m/s -exactly 299.792,46 meters per second- and is a constant value.

Obviously, the speed of light in any medium, such as gas, liquid or gel, will be lower than the speed of light in a vacuum.

4) White or visible light consists of the combination of all the colours of the light spectrum, which when combined give the light a clear appearance. An example of this is the decomposition of white light when passing through a prism or a drop of water.

The ability to perceive colors is due to visible light reflected on an object, where each color has a different wavelength. In the same way, absorbed light beams will not be visible.

5) When light "hits" an object, the reflected waves make it possible for that object to be seen, which is more difficult when the object is transparent.

This action of light on objects also allows us to appreciate their characteristics, such as shape, size, texture and color, differentiating and recognizing them thanks to these characteristics.

6) Due to the refraction of light, the passage of a ray of light from a dense medium to one of lower density - as from a liquid medium to a gaseous medium - causes its speed to increase, while the angle of refraction will be greater.

As a consequence of the open angle of refraction, the refracted light will be observed far from the light source (it will bend away from the source of light).

7) Refraction is a physical phenomenon that consists of the variation of speed and direction that light acquires when it passes from one medium to another.

In general, the different media have differences in their densities, on which the changes that occur in the waves when they pass through them depend, which is called refractive index. This index is different in each case, and influences the direction and speed of propagation of a wave.

8) Light diffusion occurs when light hits an opaque and irregular surface, causing rays to be scattered in several directions. This usually produces an effect of lightness on the illuminated objects.

Unlike reflection, light diffusion has multiple points of incidence, which generate various angles, responsible for the scattering of light.

5 0

3 years ago

A sample of gas occupies 1.2 L at 12.0oC. Assuming pressure remains the same, what would be the volume (in L) of this gas at 67o

liraira [26]

V1/T1 = V2/T2
V1 = 1.2 L
T1 = 12.0 + 273 = 285 K
T2 = 67.0 +273 = 340 K

1.2/285 = V2 / 340
V2 = 1.4 L

3 0

3 years ago

The label on a soft drink bottle gives the volume in two units: 2.0 L and 67.6 fl oz. Use this information to derive a conversio

spayn [35]

Answer:

Explanation:

The significant figures are determined by 2.0. It only has 2 places, so the answer to the last question is 2.

The English unit is 67.6 oz

The metric unit is 2 L

So there are 67.6 fl oz / 2 L = 33.8 fl oz / L

In other words 1 liter has 33.8 fl oz

But you only have 2 sig digs so the answer is actually 34 fl oz/L

3 0

3 years ago