A sunset appears red becouse

Answers

Answer 1

Answer: When sunlight travels a long path through the atmosphere to reach our eyes, it has a red tint.

Hope this helps!

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A fixed mass of gas has a volume of gas of 25cm3. the pressure of the gas is 100kPA. the volume of the gas is slowly decreased by 15cm3 at a constant temperature. what is the change in the pressure of the gas?a) 67kPAb) 150kPAc) 170kPAd) 250kPAgive reasons
Early treatment for mental illness involved a0 because doctors believed that doing this would drain the mental illness out of the person’s body.

How do charges move through an insulated wire connected across a battery? Use the terms potential difference, current, conductor, and insulator in answer.

Answers

The battery has both a positive side and a negative side. The potential difference will be the potential of the positive end of the battery minus the potential of the negative end, which will result in positive potential, or power. This potential is what gives the electrons the ability to flow from the positive end to the negative end, or to make a current. While the outside of the insulated wire is the insulator, the inside of the wire has copper, which is the conductor of the current. So, this current will go through the copper of the wire (and not the insulator) from the positive side to the negative.

Answer:

Battery is the source of electrical energy which will help the charge to flow through a medium.

Battery is a constant source of potential difference which will create constant potential difference across the ends of a conductor where it is connected.

When a charge is passed through the constant potential difference then the change in electrostatic potential energy will give kinetic energy to the charge.

It is given as

$q\Delta V = (1)/(2)mv^2$

so here charge will continuously flow through the conductor across which potential difference is applied by the battery. This constant motion or flow of charge is known as electric current.

A gas is heated from 263 K to 298 K, and the volume is increased from 24 L to 35 L. If the original pressure is 1 atm, what would the final pressure be? *

Answers

Since for closed system moles of the gas is always conserved

so as per idea gas equation we can say

$n = (PV)/(RT)$

so here we can say

$n_1 = n_2$

so here we have

$(P_1V_1)/(RT_1) = (P_2V_2)/(RT_2)$

as we know that

$T_1 = 263 K$

$T_2 = 298 K$

$V_1 = 24 L$

$V_2 = 35 L$

$P_1 = 1 atm$

now from above equation

$(1*24)/(263) = (P*35)/(298)$

on solving above equation we have

$P = 0.78 atm$

so here pressure will be 0.78 atm

Final answer:

Based on the combined form of the ideal gas law, the final pressure of the gas, given the changes in volume and temperature, would be approximately 0.725 atm.

Explanation:

The question concerns the change in conditions of a gas and asks you to determine the final pressure. This deals with the combined form of the ideal gas law, which states that the product of the initial pressure and volume, divided by the initial temperature, equals the product of the final pressure and volume, divided by the final temperature (P₁V₁/T₁ = P₂V₂/T₂).

Given that the initial pressure P₁ is 1 atm, initial volume V₁ is 24 L, initial temperature T₁ is 263 K, final volume V₂ is 35 L, and final temperature T₂ is 298 K, we can substitute these values into the equation to solve for the final pressure P₂.

Therefore, P₂ = P₁V₁T₂ / V₂T₁ = (1 atm × 24 L × 298 K) / (35 L × 263 K) ≈ 0.725 atm. So, the final pressure of the gas would be approximately 0.725 atm.

Learn more about Ideal Gas Law here:

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Solar cells convert what type of energy into electrical energy? A. thermal B. electromagnetic C. chemical D. nuclear

Answers

Answer : The correct option is, (A) thermal

Explanation :

Solar cell is a type of electrical device or p-n junction that converts the light or thermal energy directly into the electrical energy by using the photovalotic effect.

In the process of the energy conversion first require a material that absorbs the solar energy and raise the electron to the higher energy level and then flow of high energy electron to an external circuit. In this energy conversion, the silicon material is used.

Hence, the solar cells convert thermal energy into electrical energy.

Solar cells convert solar energy into electrical energy. Here, solar energy can be included in electromagnetic energy as it includes, visible light, EM radiations which can travel through empty space.

In short, Your Answer would be Option B

Hope this helps!

How do you find the pressure (in physics) if you are given the force (Newtons) and how far the object sunk into the ground?

Answers

Answer:

pressure=force/area

Explanation:

pressure equal to force divided by area,the area is how far the object sunk into the ground

You are sitting in a car that isn't moving; suddenly, the car quickly accelerates. your body seems to be pushed back against the seat. which word best explains why your body seemed to be pushed backward against the seat?

Answers

Explanation :

When the car accelerates, our body pushed backward against the seat. This effect is due to inertia.

When the car starts suddenly, our feet also comes in motion. But the rest body is still at rest.

Inertia is the property of a body which opposes its state of rest or state of motion.

In this case, the inertia of the passenger resists the motion of the car. So, he pushed backwards as the car started.

According to the Law of Inertia, our upper body was in rest and it wanted to remain in that condition.....

What force is necessary to accelerate a 70-kg object at a rate ifm4.2 m/s

Answers

F = ma
F = force
m = mass
a = acceleration

4.2 m/s = a
70 kg = m
F = ?

F = 4.2*70
F = 294 Newtons

Answer would then be : Force = 294 N

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The Ptolemaic theory of the universe was disproved bya. Descartes.b. Kepler.c. Copernicus.d. Newton.

A student has a source of radiation that emits one of a, ß or y radiation. She places thesource opposite a Geiger-Müller tube and detector and records the count rate. She then places a sheet of paper between the source and the detector and records the count rate, and then repeats this with a sheet of aluminium instead of paper. Describe how her results will allow her to work out which type of radiation is emitted by the source. Please help :)

What is the law of inertia?