Answer:
The speed of the car 6 s after starting to move is 12 m/s.
Explanation:
A car started from rest and moved along a straight road with constant acceleration of [tex]2\ m/s^2[/tex] for 6 seconds.
It is required to find the speed of the car 6 s after starting to move. Let v is the final speed of the car.
The relation between speed, acceleration and time is given by :
[tex]v=u+at[/tex]
u = 0
[tex]v=at\\\\v=2\ m/s^2\times 6\ s\\\\v=12\ m/s[/tex]
So, the speed of the car 6 s after starting to move is 12 m/s.
Wolves, which are top predators, were eliminated from Yellowstone National Park in the 1930s. In 1995, wolves were reintroduced into Yellowstone. During the period in which wolves were absent from Yellowstone, which MOST likely occurred?
A. an increase in competition for food resources among small prey
B. a greater opportunity for primary producers to flourish
C. an increase in the population of tertiary consumers
D. a greater balance of predator-prey relationships
Answer:
The answer is E
Explanation:
Wolves died off from the rona virus back in the 1930s so when they came back they brought C- 19 with them
what is polarization
What type of phase change occurs when water vapor in the atmosphere changes to liquid water in clouds?
Answer:
condensation, the process of changing from a gas to a liquid
En un proceso isobárico, la presión del gas es de 105 Pa. Halle el desplazamiento del pistón, cuya área es de 0,4 m2, cuando el gas desarrolla un trabajo de 8 x 104 J
Answer:
The displacement of the piston is 1904.76 m
Explanation:
Here we have an isobaric or constant pressure process, therefore;
Work done, W = P × (V₂ - V₁)
Where:
W = 8 × 10⁴ J
P = Pressure of the gas = 105 Pa
V₁ = Initial volume of the cylinder of the piston
V₂ = Final volume of the cylinder of the piston
We note that volume of the cylinder of the piston = Base area, A × h
Therefore;
V₁ = A × h₁
V₂ = A × h₂
Which gives;
V₂ - V₁ = A × h₂ - A × h₁ = A×(h₂ - h₁)
Where:
A = Base area of the piston = 0.4 m²
h₂ - h₁ = Displacement of the piston
∴ 8 × 10⁴ J = 105 Pa × (V₂ - V₁) = 105 Pa × 0.4 m² × (h₂ - h₁)
h₂ - h₁ = (8 × 10⁴ J)/(105 Pa × 0.4 m²)
h₂ - h₁ = 1904.76 m
Hence the displacement of the piston = 1904.76 m.
A horizontal line on a phase-change graph indicates
Answer:
A horizontal line on a phase change graph means there has been
no change. Often longer periods of research are needed to see
significant change.
A wave of wavelength 0.3 m travels 900 m in 3.0 s. Calculate its frequency.
Answer: 1000 Hz
Explanation:
You can calculate frequency by dividing velocity by wavelength
Frequency = velocity/wavelength
Find velocity first.
900 m/3 s = 300 m/s
Plug values in to find frequency.
F = (300 m/s)/0.3 m
F = 1000 Hz
A charge of 80 coulombs passes through a circuit in 5 seconds. What is the current through the circuit?
Answer:
I = 16amp
Explanation:
Charge coulomb ( Q ) = It
Where I =current in ampere
t = time = 5 seconds
80 = I × 5
I = 80/5
I = 16amp
The current through the circuit will be I = 16amp
can Somebody Explain Please
Introduction to Newton's law of gravitation
Answer: so basically, Newtons Law states that every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Explanation: newtons law simplified in my opinion is a physical law that describes the attraction between two objects with mass.
hope this helps.
Answer:
Explanation:
she rieat
How does the speed ratio change as you switch between different gears on a bicycle, and how does this affect the force you need to pedal the bicycle?
An average cyclist generates about 183 watts while doing 19 mph or 30.4 kph. Power = force × velocity. Force of a pedalling applied by a human for achieving 30.4 kph = 183/8.44 = 21.68 newtons. This is for upright bicycles.
please answer I'll give brainlist
Assuming the sound wave moves with the speed of air ( 340 m/s), what is the wavelength of the wave?
Answer:
suppose frequency of sound = 100Hz
then wavelength = speed/ frequency
= 340/100= 3.4 m
20 pts: Please write a paragraph about the big bang theory
PLEASE HELP ASAP!!!!!!!!!!!!
The first choice on the list is the correct one.
8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate the net accelerating force
Answer:
The net force of engine on total mass of train is 35000 N
The net acceleration is 1.944 m/s²
Explanation:
Here we have;
Mass of each wagon of train = 2000 kg
Number of wagons = 5
Total mass of wagons = 5 × 2000 = 10000 kg
Mass of engine = 8000 kg
Total mass, m of train (engine plus wagons) = 10000 + 8000 = 18000 kg
Force exerted by train = 40000 N
Friction force due to the railway track = 5000 N
Net force, F of engine on total mass of train = 40000 - 5000 = 35000 N
Formula for force, F = Mass, m × Acceleration, a
35, 000 = 18,000 × a
a = 35,000/18,000 = 35/18 m/s²
[tex]a = 1\tfrac{17}{18} \ m/s^2[/tex]
The net acceleration = 1.944 m/s².
Nitrogen-14 has 7 protons. How many neutrons does it have?
Answer:
7
Explanation:
Using information found on the Periodic Table of Elements:
Nitrogen contains 7 protons, 7 neutrons, and 7 electrons.
..
Atomic number is 7
Atomic mass is 14
The mass number is the sum of protons and neutrons in the nucleus.
=> You can subtract the atomic number from the mass number to find the number of neutrons.
what is a Rube Goldberg machine and show me a pic? PLEASE.
Answer:
This picture is just one example of a Rube Goldberg machine. It's sort of like a chain reaction. There are a lot of cool videos you could look up on you tube that demonstrate what they are.
Explanation:
When you have two materials with the same index of refraction, it means that
Answer:
When you have two materials with the same index of refraction, it means that if they are touched by a ray of light it won't have a chance, and its form would prevail.
Explanation:
The reason behind this is that in the first place. When light passes through an object of certain refraction it is modified from its natural state, allowing it to change in color to the human eye or many other effects in other perceptive elements. However, when the same light passes through two objects with the same refraction due to their physical characteristics, it doesn't change because once it comes out of the first one it will suffer the same effect from the last one. For it to change the refraction would have to be higher or lower. Then it would be modified. The reason is because the dimensions are not modified. Because at some point the ray of light has to come out of the first one to enter the second one.
Adam observed properties of four different waves and recorded observations about the frequency and volume of each one in his chart. Which statement could Adam declare based on the data in the table
How were lion fish introduced to the areas around Florida
Answer:
I think this will answer your question. This is information is not mine and this rightfully belongs to columbia.edu.This brightly colored fish is native to the Indo-Pacific from Australia north to southern Japan and south to Micronesia. The lionfish is usually found in coral reefs of tropical waters, hovering in caves or near crevices. Native regions as well as Savannah, Georgia; Palm Beach and Boca Raton, Florida; Long Island, New York; Bermuda and possibly Charleston. In southern Florida and off the coast of the Carolinas in early to mid 1990s.
Answer:I really don't know sorry
Explanation:
A vector points -1.55 units
along the x-axis, and 3.22 units
along the y-axis.
Find the direction of the vector.
Answer:[tex]\theta =64.29^{\circ}[/tex]
Explanation:
Given
Vector Points -1.55 units along x-axis
i.e. 1.55 units along negative x-axis
and 3.22 units along Y-axis
Direction of vector
[tex]\tan \theta =\frac{3.22}{1.55}[/tex]
[tex]\theta =tan ^{-1}(2.077)[/tex]
[tex]\theta =64.29^{\circ}[/tex]
Where [tex]\theta [/tex] is the angle made by vector with x-axis as shown in the diagram
Answer:
The answer is 115.70
Explanation:
Is jump rope a sport.
Answer:
yes
Explanation:
Un recipiente contiene 2,5 moles de gas propano. Calcula, utilizando la definición de mol, cuántas moléculas de propano (C3H8) contiene ese recipiente.
POR FAVOR NO LO ENTIENDO Y CON SUS OPERACIONES PLISS
Answer:
1.505*10^{24} molecules
Explanation:
The number of molecules is independent of the subtance, and only depends on the number of moles.
To calculate the number of molecules in a substance with n moles you use the following formula:
[tex]m=nN_A[/tex]
m: number of molecules
NA: Avogadro's number = 6.02*10^23 molecules/mol
n: moles of the substance = 2.5 mol
You replace the values of n and NA in the equation for m and you obtain:
[tex]m=(2.5mol)(6.02*10^{23}molecules/mol)\\\\m=1.505*10^{24}\ molecules[/tex]
hence, the number of molecules is 1.505*10^24
how do braces protect you while doing sports
Answer:
they don't, if you get hit in the face then the brackets are gonna rub up against the inside of your mouth then you'll bleed
Explanation:
a circuit is connected to 8 volt battery and it has 2 amperes of current flowing through the wires.What is the resistance of the circuit
Answer:
4 ohms
Explanation:
Current = Voltage/resistance
2 = 8/R
2R = 8
R = 4
What are the four theories of the origin of the moon?
You get yourself a new mirror so that you can admire yourself in the morning. When you open the box, you notice that it is only ½ your height. You think to yourself "This is no good! Now I can't see all of me!" You put it up anyway and realize that you can see your entire body in it. How can this be?
Answer:
Because you stand at a distance from the mirror at which your entire body shows.
Explanation:
Since the mirror is a plain mirror, the distance of the object from the mirror is also the distance of the image from the mirror. Also since the magnification is 1 for a plane mirror because the height of the image equals the height of the object. Since the magnification always equals 1, for you to be able to see your entire body, you must stand at a distance from the mirror such that your height equals the image height.
Answer: By keeping a distance away from the mirror.
Explanation:
If it's a plane mirror, it's possible to see your entire body by keeping distance away from the mirror. The distance of the object away from the mirror is equal to the distance of the image away from the mirror.
Se dispone de dos vasos con agua a 20 grados y queremos calentarlo hasta alcanzar 50 grados. Si el primero contiene 0,5l y el segundo, 750ml, cual de los dos requerirá mas cantidad para alcanzar la temperatura deseada? Porque?
Answer:
The cup with 0.5L
Explanation:
To know what amount of water you take into account the specific heat of the water. The specific heat of water is:
[tex]c_{water}=4186\frac{J}{kg\°C}[/tex]
Thus, 4186 J of energy are needed to icrease the temperature of 1 kg water in 1°C. Then, more grams of water will need more energy.
You have that one cup has 0.5 L and the other one has 750mL = 0.75L
The second cup of water will need more heat because the amount of water contained in the second cup is greater than in the first cup with 0.5L
How many windows should the real tree house have
Answer:
88
Explanation:
Answer:
2
Explanation:
88 was wrong and the answer then said 2
whoever answers correctly first will get brainiest
whats my middle name....?
clues:
a_n_l i_ e
3 missing letters
fill in the blanks! hehe
Answer:
annalise
Explanation:
::::::::::)))))))))
scientific notation for 836
Answer:
8.36e2
Explanation:
Use a scientific calculator
Its notation is written as :
8.36 x 10^2
Can someone please explain these or help answer them?
Answer:
41.57.
Explanation:
Sometimes if you type in google "area of a regular hexagon, it will give you a calculator you can use to solve your math questions.
