Answer:
a). la acelaración del automóvil es [tex]1.574x10^{-6}km/s^{2}[/tex]
b). la distancia recorrida por el automóvil es [tex]1.59x10^{-3}km[/tex]
La aceleración puede ser encontrada por medio de la ecuación cinemática que corresponde a un movimiento rectilíneo uniformemente variado.
[tex]a = \frac{v_{2}-v_{1}}{t}[/tex] (1)
Donde [tex]v_{2}[/tex] es la velocidad final y [tex]v_{1}[/tex] es la velocidad inicial.
La velocidad inicial del automóvil sera cero ([tex]v_{1} = 0[/tex]) ya que parte del reposo.
Antes de remplazar los valores en la ecuación 1 es necesario expresar el tiempo en unidades de segundos.
[tex]t = 0.75min \cdot \frac{60s}{1min}[/tex] ⇒ [tex]45s[/tex]
La rapidez final puede ser expresada en unidades de [tex]km/s[/tex]:
[tex]v_{2} = 7.083x10^{-5}km/s[/tex]
[tex]a = \frac{7.083x10^{-5}km/s - 0km/s}{45s}[/tex]
[tex]a = 1.574x10^{-6}km/s^{2}[/tex]
Por lo tanto, la acelaración del automóvil es [tex]1.574x10^{-6}km/s^{2}[/tex]
Luego para calcular la distancia se puede utilizar la siguiente ecuación.
[tex]d = v_{1}t + \frac{1}{2}at^{2}[/tex] (2)
[tex]d = (0km/s)(45s) + \frac{1}{2}(1.574x10^{-6}km/s^{2})(45s)^{2}[/tex]
[tex]d = 1.59x10^{-3}km[/tex]
Por lo tanto, la distancia recorrida por el automóvil es [tex]1.59x10^{-3}km[/tex]
How do you explain newton’s second law
Answer:
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Explanation:
Hope you get it right!
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
which is a harmful role of bacteria of bacteria?
Answer:
Harmful bacteria are called pathogenic
Explanation:
Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.
What term is used to describe the amount of energy it takes for 1 gram of a substance to be raised one degree in temperature?
A.
Specific energy
B.
Specific mass
C.
Specific gravity
D.
Specific heat
Answer:
The answer is specific heat.
Explanation:
The amount of energy for 1 gram of a substance to be raised one degree is called specific heat because it involves energy and temperature going up.
Heat is a form of energy, so it is the most appropriate name.
I hope this helps! :)
The amount of heat required to increase the temperature of 1 gram of a substance by 1 degree Celsius (°C) is known as specific heat. Since water has a higher specific heat than other substances, it requires more energy to raise its temperature. Thus, option D is correct.
What are the characteristics of Specific heat?One gram of a substance's temperature can be raised by one degree Celsius by applying a certain amount of heat, or specific heat.
Calories or joules per gram per Celsius degree are typically used as the units of specific heat. One calorie (or 4.186 joules) per gram per degree Celsius, for instance, is the specific heat of water.
Specific heat is the quantity of energy required to raise a substance's temperature by one degree in order to raise a gram of it.
Therefore, Specific heat term is used to describe the amount of energy it takes for 1 gram of a substance to be raised one degree in temperature.
Learn more about Specific heat here:
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A capoeira é muito mais que uma luta, por isso os campeonatos internos tem o objetivo de: 1 ponto Testar a força dos participantes. Criar lutadores profissionais. Avaliar o indivíduo como um todo. Competir quem faz mais golpes.
Answer:
Avaliar o indivíduo como um todo.
Explanation:
O graduado na capoeira, é uma pessoa que recebe mais respeito pelo grupo. Sendo portanto o objetivo de cada exame interno, ou pelo menos deveria ser em sua vasta maioria avaliar o indivíduo como um todo.
The battery has a voltage of 12V. R1 = R2 = 100Ω.
I1 = A I2 = A IT =
Word Bank:
0.360.240.830.120.060.120.006
Answer:
FOR PARALLEL CONNECTIONI1 = 0.12AI2 = 0.12A IT =0.24AFOR SERIES CONNECTIONI1 = I2 = 0.06AIT =0.06AExplanation:
According to ohms law, V =ITRt
V is the supply voltage
IT is the total current flowing in the circuit
Rt is the total equivalent resistance
Given R1= R2= 100Ω
V= 12V
FOR PARALLEL CONNECTION;
To calculate the total current IT in the battery, we need to calculate the total equivalent resistance RT first. For a parallel connected circuit, the equivalent resistance in the circuit is the sum of the reciprocal of its individual resistances as shown;
[tex]\frac{1}{RT} = \frac{1}{100} + \frac{1}{100}\\\frac{1}{RT} = \frac{2}{100} \\\frac{RT}{1} = \frac{100}{2}\\[/tex]
RT = 50Ω
from the equation above;
IT = V/RT
IT = 12/50
IT = 0.24A
Note that in a parallel connected circuit, different current flows through the resistances but the same voltage is across them.
IT = I1+I2
For current in resistance R1;
I1 = V/R1
I1 = 12/100
I1 = 0.12A
Since both resitance are the same, they will share the total current equally. Therefore I2 = 0.12A
FOR SERIES CONNECTION;
The total equivalent resistance in the circuit will be the sum of their individual resistances.
[tex]RT = R1+ R2[/tex]
RT = 100Ω+100Ω
RT = 200Ω
IT = V/RT
IT = 12/200
IT = 0.06A
Since the resistances are connected in series, the same current will flow through them but different voltages. The total current flowing in the circuit will be the same current flowing through the resistors.
Therefore I1 = I2 = 0.06A
20 pts: Please write a paragraph about the big bang theory
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
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
If a magnet is cut into unequal size pieces, how many north and south poles will each of the pieces have?
Answer:
Each of the pieces will have one north pole and one south pole.
Explanation:
A magnet is made up two ends, one end is known as north pole while the other end is known as south pole.
When a magnet is cut into unequal size pieces, each of the piece will have two ends, one end of each piece is known as north pole while the other end will be south pole.
Therefore, each of the pieces will have one north pole and one south pole.
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.
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.
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 HELP ME!
A student notices that when calcium chloride is placed in water, the test tube feels warm. What kind of reaction has taken place?
A. Combustion Reaction
B. Endothermic Reaction
C. Exothermic Reaction
D. Endergonic Reaction
Answer:
C. Exothermic Reaction
Explanation:
Let's go through the choices
A. Combustion - Combustion is a highly exothermic / redox reaction which produces light and heat (i.e basically it bursts into flames). In the description, the only reaction is that it feels warm, hence this is not the answer.
B. Endothermic - Recall that endothermic reactions absorbs heat and thus cools the surroundings thereby making test tube feel cooler. this is obviously not the case so this is not the answer.
C. Exothermic - Recall that exothermic reactions releases heat and thus causes the surroundings thereby making the test tube feel warmer (or hotter in some cases). This describes our situation so THIS IS THE ANSWER.
D. Endergonic reactions require an input of energy from an external source that is adsorbed by the reaction (for example if heat was applied by an external source). In this case, there is no mention of additional energy sources. Hence this is probably not the answer.
What are global wind patterns called?
Global Wind Patterns wind belts of the general circulation. The global wind pattern is also known as the "general circulation" and the surface winds of each hemisphere are divided into three wind belts: Polar Easterlies: From 60-90 degrees latitude. Prevailing Westerlies: From 30-60 degrees latitude (aka Westerlies).
Answer:
C
Its C on edge
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.
Which of the following is NOT a way to increase the solubility of a solid in water?
A.
crushing the solid
B.
shaking the mixture of solid and water
C.
raising the temperature of the water
D.
letting the mixture stand still a long time
Answer:
A. crushing the solid .
Answer:
A.) crushing the solid
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.
How many windows should the real tree house have
Answer:
88
Explanation:
Answer:
2
Explanation:
88 was wrong and the answer then said 2
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
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:
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
A type of Lead (Pb) ion has a + 4 oxidation number. Sulfur (S) has a — 2 oxidation number. What would be the chemical formula for the compound of these two elements?
Answer: The chemical formula for the compound of these two elements is [tex]PbS_2[/tex]
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here metal lead is having an oxidation state of +4 called as [tex]Pb^{4+}[/tex] cation and sulphur non metal has oxidation state of -2 called as [tex]S^{2-}[/tex]. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]PbS_2[/tex]
The chemical formula for the compound of these two elements is [tex]PbS_2[/tex]
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
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
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.
Which of the following planets has a diameter that is larger than the diameter of the Earth?
Answer:
Jupiter
Explanation:
Jupiter is the largest planet in our solar system and is about 11 times larger than earth.
What is thermal energy
Answer:
Thermal Energy. Thermal energy is the internal energy of an object due to the kinetic energy of its atoms and/or molecules. The atoms and/or molecules of a hotter object have greater kinetic energy than those of a colder one, in the form of vibrational, rotational, or, in the case of a gas, translational motion.
Explanation:
What is the ph of ammonia
Answer:
Ammonia is a weak base with a standard pH level of about 11.
Explanation:
