Answer:
1.52 kJ
Explanation:
Total kinetic energy in gas K = 3NkT/2 where N = number of molecules, K = Boltzmann constant and T = temperature.
Also from the ideal gas law, PV = NkT
substituting PV into K above
K = 3PV/2 where P = pressure = 1.013 × 10⁵ N/m² and V = volume of gas = 5 litres = 5 dm³ = 5 × 10⁻³ m³
K = 3 × 1.013 × 10⁵ N/m² × 5 × 10⁻³ m³/2
= 1519.5 J
= 1.5195 kJ
≅ 1.52 kJ
The purpose of striking the ball in a volleyball game is to: 1. Place the ball in motion 2. Change the direction of the ball's motion 3. Slow the ball's motion 4. All of the above
Answer:
4. All of the above
Explanation:
The purpose of striking the ball in a volleyball game:
From the serve you could state that you need to place the ball in motion.
When returning a shot of, you normally want to change the direction of the ball's motion.
During a dropshot, you purposely want to slow down the ball's motion.
The correct answer must be all of the above.
An object rotates describing a horizontal circumference when subjected to a centripetal force F. What centripetal force will act on the object
if the radius of the circle is doubled and the kinetic energy of the object is halved?
A) F/4
B) F/2
C) F
D) 4F
please explain this to me :(
Answer:
Centripetal Force Requirement
The Forbidden F-Word
Mathematics of Circular Motion
As mentioned earlier in this lesson, an object moving in a circle is experiencing an acceleration. Even if moving around the perimeter of the circle with a constant speed, there is still a change in velocity and subsequently an acceleration. This acceleration is directed towards the center of the circle. And in accord with Newton's second law of motion, an object which experiences an acceleration must also be experiencing a net force. The direction of the net force is in the same direction as the acceleration. So for an object moving in a circle, there must be an inward force acting upon it in order to cause its inward acceleration. This is sometimes referred to as the centripetal force requirement. The word centripetal (not to be confused with the F-word centrifugal) means center seeking. For object's moving in circular motion, there is a net force acting towards the center which causes the object to seek the center.
To understand the importance of a centripetal force, it is important to have a sturdy understanding of the Newton's first law of motion - the law of inertia. The law of inertia states that ...
... objects in motion tend to stay in motion with the same speed and the same direction unless acted upon by an unbalanced force.
According to Newton's first law of motion, it is the natural tendency of all moving objects to continue in motion in the same direction that they are moving ... unless some form of unbalanced force acts upon the object to deviate its motion from its straight-line path. Moving objects will tend to naturally travel in straight lines; an unbalanced force is only required to cause it to turn. Thus, the presence of an unbalanced force is required for objects to move in circles.
Explanation:
A quarterback back pedals 2.5 meters northward and then
runs 6.8 meters southward.
Answer:
The travels is 9.3 and displacement of 4.3 meters
Explanation:
The computation of distance and displacement is shown below:-
Distance = Northward meters + Southward meters
= 2.5 meters + 6.8 meters
= 9.3 meters
Displacement= Final - Initial distance
= 6.8 meters - 2.5 meters
= 4.3 meters
Direction→southward
Here direction is going towards the southwards as southwards distance in higher than the northward distance of displacement is southward.
Explain how a battery works. What are some possible materials you could use to make a battery for a circuit?
Answer:
Batteries are systems that store chemical energy and then release it as electrical energy when they are connected to a circuit. Batteries can be made from many materials, but they all share three main components: a metal anode, a metal cathode and an electrolyte between them. The electrolyte is an ionic solution that allows charge to flow through the system. When a load, such as a light bulb, is connected, an oxidation-reduction reaction occurs that releases electrons from the anode while the cathode gains electrons
Explanation:
The burning of a log releases the logs chemical_energy into other forms of energy
Answer:
When we burn wood we are releasing solar energy, in the form of heat, that has been stored in the wood as chemical energy. The process of photosynthesis converted solar energy, water and carbon dioxide into oxygen and the organic molecules that form the wood, half the weight of which is carbon.
Explanation:
an aircraft acceleration from 100m/s to 300m/s in 100 s what is acceleration
Answer:
[tex](300 - 100) \div 100 [/tex]
Please help!!!! How many volts does this source provide for the circuit?
2
4
8
12
Answer:
12 volts
Explanation:
4 + 4 + 4 = 12 volts all volts on parallel circuit are the same
Each color that we see corresponds to a different _____ of light.
a. speed
b. phase
c. amplitude
d. wavelength
Answer:
D wavelength
Explanation:
The different wavelengths determine the color.
A car moving along a straight level road has an initial speed of 3 m s-1 and its acceleration is 2 m s-2? What
is the speed of the car after 5 s?
Answer:
13 ms-1
Explanation:
Answer:
SE RESUELVE CON LA ECUACIÓN DE GALILEO GALILEI
Explanation:
v = 3 m/s + [tex]2 m/s^{2}[/tex](5 s) = 13 m/s
which statement BEST compares the force of gravity on a school bus on a school day and a weekend?
Answer:
The force of gravity between the Earth and the school bus is more on a school day than on a weekend
Explanation:
The force of gravity, F, is the attractive force that holds objects in place on the Earth's surface
The force of gravity attracting the bus of mass m to the Earth of mass M having a radius of [tex]R_{Earth}[/tex], can be presented by the following equation;
[tex]F = \dfrac{G \times M \times m}{(R_{Earth})^2}[/tex]
Which shows that the force increases as the mass of the bus increases
Since the school bus mass on a school day when carrying Pupils is mare than the mass of the bus in the weekend when the bus is empty, the force of gravity between the Earth and the school bus is more on a school day than on a weekend.
Anna will wear a black dress when she attends her cousin’s wedding. Which color(s) does the dress absorb?
Answer:
The answer is all colors
Explanation:
how much would you weigh on an imaginary planet that has no gravitational force?
0kg
If the gravitational pull is zero and I multiply by mass I get a zero
Which waves help you to know if there is a snow day at school for the day?
Answer:
Electromagnetic wave
Explanation:
Snow days are announced on the by phoning the parents and guardians and also the news about a snow day can be broadcast on the television or radio airwaves or on the internet which are forms of electromagnetic wave transmission
An electromagnetic wave are oscillations of electric and magnetic fields which form electric and magnetic field vibrations
The direction of the oscillating electric and magnetic fields is perpendicular to the direction of propagation of the electromagnetic wave.
Which of these os true? (A)light travels in a straight line.(B)light travels in a random manner. (C) parallel beams are divergent in nature.(D)parallel beams are convergent in nature.(E)non of the above
Answer:
light travels in a straight line
Explanation:
the others are wrong
instruments used to measure the following quantities Mass weight length time and density of a liquid
Answer:
Mass: Beam balance
Weight: Beam balance
Length: Ruler
Time: Clock
Density of liquid: Hydrometer
Using a scale of 1 cm to represent 10 N , find the size and direction of the resultant of forces of 30 N and 40 N acting at right angles to each other.
Answer:
Hence, option (A) is correct answer.
Explanation:
If an object is moving with a velocity of 24 m/s and has an acceleration of -4m/s2,
how long will it take it to stop?
A.-6s
B.6s
C.-96 s
D.20s
Answer:a
Explanation:
How does gravity keep the moon in orbit around earth
Answer:
The moon's orbit draws the oceans to it, which triggers ocean tides. Force produces stars and planets by gathering the mass from which it exists.
Explanation:
The moon's orbit draws the oceans to it, which triggers ocean tides. Force produces stars and planets by gathering the mass from which it exists.
Answer is above
Hope this helps.
In order to fly horizonatally at a steady speed, which two of the forces shown on the aeroplane must be equal.
(The forces shown on the aeroplane are air friction, weight and engine thrust)
Read the scenario below and answer the question that follows. Susan was in her algebra class preparing to take a test. Her instructor, Mrs. Williams, tells Susan, “Try hard, even though math can be difficult for women to succeed in.” What is the most likely effect of Mrs. Williams’ comment on Susan’s test performance, and why? A. improved performance due to study behavior B. improved performance due to mores C. reduced performance due to stereotype threat D. reduced performance due to cultural shaping
Answer:
c. reduced preformance due to stereotype threat
Explanation:
The most likely effect of Mrs. Williams' comment on Susan's test performance was that the reduced performance due to stereotype threat. Thus, the correct option is C.
What is Stereotype threat?Stereotype threat is a situational predicament in which the people feel themselves to be at risk or are actually at risk of conforming to the stereotypes about their social group in the community. It is theorized to be a contributing factor to the long-standing racial and gender gaps in the academic performance of a community as a whole.
The worst part of stereotype threat would be that it becomes socially acceptable for the people to agree and think that it is true of that segment of the society. This has been the tool of tyrants and tyrannical regimes to divide and conquer since the down of empires.
Therefore, the correct option is C.
Learn more about Stereotype threat here:
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need this asap will mark brainliest
Answer:
0.203 kN
Explanation:
203 N *(1 kN/1000N) = 0.203 kN
Use the drop-down menu to complete the statement. Based on the data in the line graph, you can predict there will likely be visitors in December compared to October.
Answer:
Fewer
Explanation
Just did it on edge
Based on the data provided in the line graph, one can predict there will likely be less or fewer visitors in December compared to October.
What is line graph?The graph between two physical quantities in which the curve is a straight line. The line may be going upwards or downwards.
The slope is defined as the ratio of change in quantity on y axis and the change in quantity on x axis.
Slope is represented as
m = Δy / Δx
Given is graph(attached below) between the number of visitors and months. The graph is having positive slope till August and then after that slope is negative till December.
Positive slope means the change in quantity on y axis is increasing and negative slope is change in quantity on y axis is decreasing
When the number of visitors are compared, December month has less visitors than in the October month.
Thus, Based on the data provided in the line graph, one can predict there will likely be less or fewer visitors in December compared to October.
Learn more about line graph
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7. Convert 746 days to centuries.
Answer: 0.0208 Centuries
Explanation:
There is 2.739*10^-5 centuries per 1 day.
We can take 746 days and multiply it by that 2.7 number to get how many centuries are in 746 days.
[tex]746 *(2.793*10^{-5})[/tex] = 0.0208 centuries
What is the definition of density
Answer:
the degree of compactness of a substance.
Explanation:
The density, of a substance is its mass per unit volume. The symbol most often used for density is ρ, although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume: where ρ is the density, m is the mass, and V is the volume. Wikipedia
Answer:
The quantity of mass per unit volume of a substance
Explanation:
Molecules are groups of atoms connected together. Which substances in the simulation have particles that are
molecules?
Answer:
The particles in oxygen and water are made up of more than one atom, so they have particles that are molecules.
Explanation:
Give two examples of spatial interference which can be easily observed.
A car moving at a speed of 20 m/s then accelerates uniformly at 1.8 m/s^2 until it reaches a speed of 25 m/s. What distance does it travel during the time it is accelerating?
66 m
54 m
62 m
50 m
58 m
Answer:
62.5 m
Explanation:
.......................................
how can a duck cross a road?
Answer:
Using its legs
Explanation:
Over an estimated billion years mammals and other species have developed this "revolutionary engine" lol. Legs allow for faster, more efficient and overall better transportation means, its not reliant on any other source just on power which comes from foods which is broken down in the Silvia, soon to become the stomach. If you want to dig deeper into this topic search of video's on how the mitochondria is the factory, or the powerhouse of the cell, also I recommend Kurzgesagt on how the food is processed and turn into energy, and how that energy can support life.
Answer:
With his or her legs.
Explanation:
The he-duck or she-duck may cross a road in a number of ways, however the most common is to simply walk. Ducks often walk across roads to mock comedian chickens in satire. They put one webbed foot in front of the other, and shake their butts, or, scientifically, duckicus butticus. [DUC-I-CUS BUT-I-CUS]
An amazing phenomenon.
A potential difference of 10.0 volts exists between two points, A and B, within an electric field. What is the
magnitude of charge that requires 2.0 x 10-2 joule of work to move it from A to B?
1. 5.0 x 10^2 C
2. 2.0 x 10^-1 C
3. 5.0 x 10^-2 C
4. 2.0 x 10^-3 C
Answer:
answer is 4
Explanation:
The charge that is moved is required.
The magnitude of charge moved is option 4. [tex]2\times 10^{-3}\ \text{C}[/tex]
Potential differenceV = Potential difference = 10.0 V
W = Work done = [tex]2\times10^{-2}\ \text{J}[/tex]
q = Magnitude of charge
When work done on moving a charge is divided by the potential difference we get the magnitude of the charge that is moved.
The charge of an object is the result of an excess or a lack of positive or negative charges on a body.
So, the magnitude of charge is given by
[tex]q=\dfrac{W}{V}\\\Rightarrow q=\dfrac{2\times 10^{-2}}{10}\\\Rightarrow q=2\times 10^{-3}\ \text{C}[/tex]
Learn more about potential difference:
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The famous astronomer, Kepler, determined that the planetary orbits were: 1. ellipses 2. circles 3. epicentric 4. geocentric
Answer:
geocentric
i hope this helps!!!!
Explanation:
