A substance has a melting point of 0 degrees celsius and a boiling point of 100 degrees celsius. The substance is most likelya. water
b. hydrogen
c. gold
d. table salt

Answers

Answer 1

Answer: water. These physical properties are specific to water.

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Which of the following voltages would most likely be used as a primary distribution voltage by an electric utility company?a. 120 V
b. 440 V
c. 4,160 V
d. 69,000 V

Answers

Answer:

c. 4,160 V

Explanation:

Primary distribution voltage by electric utility company are often distributed around 3 Kv to 35 Kv, which would be a range between 3,000 V to 35,000 V because in order to be consumed by the public they use transformers to lower the voltage to less than 1Kv this can be used in domestic usage, so form the options the one that most likely would be used as a primary distribution voltage is 4,160 V.

The answer is D.69,000 V.

♡♡Hope I helped!!! :)♡♡

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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A soccer ball is released from rest at the top of a grassy incline. After 4.1 seconds, the ball travels 43 meters and 1.0 s after this, the ball reaches the bottom of the incline. What was the magnitude of the ball's acceleration, assume it to be constant? Express your answer using two significant figures.

Answers

Answer:

The acceleration of the ball as it moves down the grassy incline, if constant, is 5.1 m/s²

Explanation:

Initial velocity, u = 0m/s

Acceleration = ?

Vertical distance covered as at t=4.1s, H = 43m

Using the equations of motion,

H = ut + 0.5at²

43 = 0 + 0.5a (4.1)²

a = 43/(0.5×4.1²) = 5.1 m/s²

Hope this Helps!!

What term is used to describe the 4 in the expression 4 Ca(NO³)²

Answers

Hello,

The 4 describes the amount of calcium in that compound.

Have A Good Day.

Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals. Which term do scientist use to describe these orbits

Answers

Planets in our solar system do not revolve around the sun in perfect circles. They revolve in the elliptical orbits.

What is the solar system?

The solar system consists of the planet's satellites, as well as numerous comets, asteroids, and meteoroids, as well as the interplanetary medium.

Planets in our solar system do not revolve around the sun in perfect circles. They revolve in the elliptical orbits.

Hence, option D is correct.

To learn more about the solar system, refer to the link;

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Answer:

It is most likely the word elliptical.

Explanation:

Usually the term elliptical refers to the oval-like shape of a substance or path of an object. The question states, "Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals." Because the planets orbit around the sun in an oval-like path, those orbits can be described as elliptical. Scientists also normally use this word to describe the same thing; Therefore, your answer is elliptical.

One light-hour is the distance that light travels in an hour. How far is this, in kilometers? (Recall that the speed of light is 300,000 km/s.) _______A) 18 million kmB) 1.08 billion kmC) 300,000 kmD) 9.46 trillion kmE) 100 million km