Answer:
The number of moles of the air is 4.464 x 10⁻⁴ mole
The number of molecules is 2.688 x 10²⁰ molecules
Explanation:
Given;
pressure of the air, P = 1 atm
volume of the air, V = 1 m³
temperature of the air, T = 0° C = 273 K
The number of moles of the air is calculated as;
PV = nRT
[tex]n = \frac{PV}{RT}[/tex]
where;
n is the number of moles
R is ideal gas constant = 8.2057m³atm/mol.k
[tex]n = \frac{1atm \ \times \ 1m^3}{(8.2057 \ m^3 atm/mol.K)(273 \ K)} = 4.464 \ \times 10^{-4} \ mol.[/tex]
The number of molecules is calculated as follows;
1 mole ---------------------> 6.022 x 10²³ molecules
4.464 x 10⁻⁴ mole ----------> ?
= (4.464 x 10⁻⁴) (6.022 x 10²³ molecules)
= 2.688 x 10²⁰ molecules of air.
HELP WILL MARK BRAINLIEST!!
Answer:15
Explanation:
Static stretching is done by slowly moving a joint towards its maximum range of motion. You will feel a gentle pulling sensation in the muscle being stretched.
True or False
Answer:
True
Explanation:
It is true that you will feel a gentle pulling sensation in the muscle being stretched when Static stretching is done by slowly moving a joint.
What is static stretching?Static stretching is most likely the most well-known and time-honored method of stretching. This entails extending a muscle to its maximum length and then maintaining that position for at least 15 to 20 seconds.
With each stretch, the emphasis is frequently on focusing on a specific muscle group.
Hence it is true that you will feel a gentle pulling sensation in the muscle being stretched when Static stretching is done by slowly moving a joint.
To learn more about the static stretching refer to the link;
https://brainly.com/question/1237629
If you drop a baseball and a soccer ball at the same time which will hit the ground first?
Answer:
Baseball
Explanation:
If two objects are the same size but one is heavier, the heavier one has greater density than the lighter object. The heavier object would fall and hit the floor first. In other words the baseball would hit the ground first.
HOPES THIS HELPS YOU!!! PLEASE MARK AS BRAINLIEST???
A child tugs on a rope attached to a 0.62 kg toy with a horizontal force of 16.3 N. A puppy pulls the toy in the opposite direction with a force of 15.8 N. What is the acceleration of the toy
Answer:
[tex]a=51.77\ m/s^2[/tex]
Explanation:
Given that,
The mass of a toy, m = 0.62 kg
Force with which a child pull the toy = 16.3 N
The force with which the toy pulled in the opposite direction = -15.8 N
We need to find the acceleration of the toy. Let F be the net force acting on the toy. It is equal to :
F = 16.3 N - (-15.8 N)
= 32.1 N
Let a be the acceleration of the toy. Using Newton' second law of motion to find it.
F = ma
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{32.1}{0.62}\\\\a=51.77\ m/s^2[/tex]
So, the acceleration of the toy is [tex]51.77\ m/s^2[/tex].
Which expression is equivalent to 5(2+7)? 0 2(5+7) O 2 + 7(5) O 5(2)+7 O 5(2)+5(7)
Answer:
5(2)+5(7)
Explanation:
5(2)+5(7)=10+35=45
HELP PLEASE BOYLES LAW
Answer:
3 L
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 2 L
Initial pressure (P₁) = 0.75 atm
Final pressure (P₂) = 0.5 atm
Final volume (V₂) =?
Using the Boyle's law equation, the new volume (i.e final volume) of the Ne gas can be obtained as:
Initial volume (V₁) = 2 L
Initial pressure (P₁) = 0.75 atm
Final pressure (P₂) = 0.5 atm
Final volume (V₂) =?
P₁V₁ = P₂V₂
0.75 × 2 = 0.5 × V₂
1.5 = 0.5 × V₂
Divide both side by 0.5
V₂ = 1.5 / 0.5
V₂ = 3 L
Thus, the new volume of the Ne gas is 3 L
1. How much heat is produced if you heat .25 kg water from 25 degrees C to 100 degrees C. The specific heat of water is 4180 J/kg C.
Answer:
Q = 78375 [J]
Explanation:
To solve this problem we must use the following ideal equation for the thermal energy of an element or substance depending on the temperature change.
[tex]Q=m*C_{p}*(T_{final}-T_{initial})[/tex]
where:
Q = heat [J]
m = mass = 0.25 [kg]
Cp = specific heat = 4180 [J/kg*C]
Tinitial = 25[°C]
Tfinal = 100 [°C]
[tex]Q =0.25*4180*(100-25)\\Q = 78375 [J][/tex]
Q12. How much force is applied on the body when 150 joule of work
is done in displacing the body through a distance of 10m in the
direction of force?
Force = Work/distance
Force = 150/10
= 15 Newtons
Force = 15 Newtons
Therefore, 15 newtons of force is applied to the body when 150 joules of work
is done in displacing the body through a distance of 10m in the direction of the force.
the photo shows a swimmer pushing off the side of a pool
Answer:
Every action has an equal and opposite reaction.
Explanation:
Answer:
An action-reaction force pair
Explanation:
define work and power
Answer:
Work and power is described below in complete details.
Explanation:
Work is described as the method of energy change to the movement of an object through the employment of force. This is ordinarily expressed as the outcome of power and displacement. The SI unit of work is Joule. Power is described as the quantity of energy conveyed in unit time. Power is a measure of the amount of work performed per unit of time.
pain... physical, mental, emotional?
Select the correct rocks.
Identify the igneous rocks.
Answer:
Red Volcano Rock and the Lava Rock Covered in Sulphur
Explanation:
Igneous Rocks are formed by volcanoes, lava, and magna. Sandstone is sedimentary and Slate is metamorphic. The other two are literally formed by volcanoes.
Answer:
Red Volcano Rock and the Lava Rock Covered in Sulphur
Explanation:
Andre listed some properties of electromagnetic waves.
1) transfer thermal energy by radiation
2) can transfer energy over great distances
3) need matter to transfer energy through
4) are disturbances that carry energy
Which best describes Andre’s error?
Electromagnetic waves transfer thermal energy by conduction.
Electromagnetic waves can only transfer energy over short distances.
Electromagnetic waves can transfer energy through empty space.
Electromagnetic waves are not considered disturbances.
Answer: Electromagnetic waves can transfer energy through empty space.
Explanation:
Electromagnetic waves are formed when an electric field comes in contact with a magnetic field. The electric field and magnetic field of an electromagnetic wave are perpendicular to each other. They are also perpendicular to the direction of the wave.
Electromagnetic waves travel with speed of light in vacuum.
Electromagnetic wave does not need a medium to propagate or travel from one place to another. Electromagnetic waves are 'transverse' waves which means that they are measured by their amplitude and wavelength.
Electromagnetic waves do not lose energy when they travel and thus can travel far from its source.
Answer:
C.
Electromagnetic waves can transfer energy through empty space.
Explanation:
cause i dont need one
what is potential displacement?
Answer:
The answer to this question is given below in this explanation section.
Explanation:
"potential displacement"
in geometry and mechanics a displacement is a vector whose length is a shortest distance from the initial to the final position of a point p undergoing motion.it quantifies both the distance and direction of the net or total motion along a straight line from the initial position to the final position of the point trajectory.A displacement may be identified with the translation that maps the initial position to the final position.
A displacement ,may also described as a relative position that is as the final position xf of the point to the point relatively to its initial position xi.The corresponding displacement vectors can be defined as the difference between the final and initial positions.
s=xf-xi=Δx
in considering motion of objects over time,the instantaneous velocity of the object is the rate of change of the displacement as a function of time.The instantaneous speed then is distinct from velocity or the time rate of change of the position vector.if one considers a moving initial position or equivalently a moving origin.
From motion over a given interval of time,the displacement divided by the length of the time interval defines the average velocity which is a vector and differ thus from the average speed,which is a scalar.
give me much information about Hubble space telescopes as possible you can. I have final research thing and I need ti write about Hubble telescope but I want to get more information from you guys. I’m giving you A LOT of points!!! (This is astronomy class) posted this again fir other people to answer :)
A child is on a sled moving down a hill at 27.6 m/s. The combined mass of the sled and child is 60.6 kg. The momentum of the child and sled is ____.
Answer:
1672 kgm/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question we have
momentum = 60.6 × 27.6
1672.56 kg.m/sHope this helps you
One scientist is using an electromagnetic wave to map the dust between stars. The electromagnetic wave has shorter wavelength than radio waves but longer wavelength than visible light. What electromagnetic wave is the scientist using? X-ray Infrared light Gamma ray Ultraviolet radiation
How much time does it take to use 300 W of power to do 1800 J of work? Round your answer to the nearest whole
number
The time is
S.
Done
Intro
Answer:
6 seconds
Explanation:
At night, within how many feet of approaching a vehicle from the rear must you dim your high beam headlights
Answer: 500 ft
Explanation:
High beam headlights help one to see better at night as the range of vision is greatly expanded. They can however, blind drivers coming on the opposite lane.
It is therefore prudent to ensure that when using high beam headlights, you dim them when a car is coming towards you. The appropriate distance to do so is a minimum of 500 ft from the car.
An electric heater is rated at 1500 W. If the heater is rated as 80% efficient, calculate the output
rate of energy
Answer:
Power = 1200 [W].
Explanation:
The efficiency of an electrical equipment is defined as the relationship between the power realized, over the power that is consumed. For this case, they give us the data of consumed power and efficiency in this way we can calculate the power that the equipment performs.
[tex]Efficency=\frac{Power_{done}}{P_{consumed}}\\0.8 = \frac{Power_{done}}{1500} \\Power_{done}=1500*0.8\\Power_{done} = 1200 [W][/tex]
This means that of the 1500 [W], 1200 [W] are actually used to get the job done. This is established by means of the first law of thermodynamics.
Explain the process used to translate the chemical equation below into a chemical equation written in words. Use details to support your answer.
MgO+C=CO(g)+Mg
Answer:
See explanation
Explanation:
We have to first put down the balanced reaction equation;
MgO+C------->CO2(g)+Mg
We then have to identify each specie in the reaction equation. The reactants are;
Magnesium oxide and carbon
The products are
Carbon dioxide and magnesium metal
So the word equation is as follows;
Magnesium oxide + carbon ----> carbon dioxide + magnesium
In a sentence form;
One mole of magnesium oxide reacts with one mole of carbon to yield one mole of carbon dioxide and one mole of magnesium metal.
Pollen is one-celled, or unicellular. It is used for reproduction in many types of plants. The bee is collecting nectar and, while doing that is transferring the very tiny pollen grains. The bee and the flowering plant are multicellular organisms, but they both have many things in common with the unicellular pollen What is one feature NOT shared by all three? All are made of one or more cells. The cells of each contain genetic material. The cells of each contain exactly the same parts.
Answer:
The cells of each contain exactly the same parts.
Explanation:
Three different organisms are involved in this question viz: pollen, bee and flowering plant. According to the question, they are all living organisms, which means that they all contain one or more cells.
Although they all have cells but the cells of each does not contain exactly the same parts. Bee is an animal while pollen produced by the flowering plants are plants, hence, the parts/organelles contained in each cell of the mentioned organisms are mentioned.
crude oil coal and peat are examples of fossil fuels name another one
Answer:
petroleum and Natural gas are fossil fuels
Explanation:
21. A delivery driver drove south 230 km from Sawpit to Gassville. He then turned around and drove back north for 71 km to Mount Carmel. The total trip took 9 hours
What was the delivery driver's average speed?"
Average speed
km per hour
"Round your answer to two decimal places if necessary
Why do Kepler's laws describe?
Answer:
The shape of an orbit
Explanation:
Answer:
The geometry of an orbit
Explanation:
AYE PECKS
HELP!! I need an explanation for this question!
Assuming a constant force, and hence a constant acceleration a, we have by Newton's second law,
4.0 N = (1.2 kg) a → a = (4.0 N) / (1.2 kg)
and by definition of average velocity,
a = (5.0 m/s - 2.0 m/s) / t
where t denotes the time for which the force is applied.
So,
(4.0 N) / (1.2 kg) = (3.0 m/s) / t → t = (3.0 m/s) (1.2 kg) / (4.0 N) = 0.90 s
WILL MARK BRAINIEST!!!!!! (Fill in the blanks with the possible answers at the bottom)
1. A Shallow __ is a good indicator of tsunamis, but sends data very slowly and cannot detect earthquakes. *
2. A __ is caused by a sudden shift in the ocean crust which displaces the water. *
3. Tsunamis are common at __ plate boundaries, since large earthquakes release the built up pressure, resulting in a quick vertical movement of the plate. *
4. A tsunamis is possible, but unlikely at a __ plate boundary where two plates are moving sideways past each other. *
5. The Indonesian Earthquake of 2004 had a 9.1__, which was the third largest ever recorded in human history. *
ALL POSSIBLE ANSWERS!!!!
A. Earthquake,
B. Tsunami,
C. Magnitude,
D. Sensor,
E. Transform,
F. Convergent,
G. Divergent.
If the specific heat of water is 4.18 J/gC, what is the approximate increase in thermal energy when the temperature of 10 g of water is raised from 15°C to 35°C?
Answer:
840
Explanation:
Multiply the specific heat and mass. Then subtract the initial temperature from the final one to get 20. Now multiply all your numbers together.
Question 2 (10 points)
NEED HELP ASAPPPPPPP!!!!
To stop the soccer ball, and gain control of it is called what?
(a) winning
(b) trapping
(c) stopping
(d) kicking
Answer:
traping
Explanation:
Answer:
B. Trapping
Explanation:
Why is it generally easy to filter out particles in suspension?
Answer: A suspension is a heterogeneous mixture in which some of the particles settle out of the mixture upon standing. The particles in a suspension are far larger than those of a solution, so gravity is able to pull them down out of the dispersion medium (water).
Explanation: