Answer:
Option C
Explanation:
Light is an electromagnetic wave as it has characteristics of both electrical and magnetic waves. It is not a mechanical wave. Water and sound wave are mechanical wave as they need some medium to travel while light do not need any medium to travel.
Hence, option C is correct
the volume of the container was 2.5 L at a temperature of 350K. At what temperature will the volume of the container be double its initial value, knowing that pressure remains constant ? (Find the temperature in Celsius ) Show your work below.
Answer:
Explanation:
Given the following data;
Initial volume = 2.5 L
Initial temperature = 350 K
Final volume = 2V1 = 2*2.5 = 5 L
To find the final temperature, we would use Charles law;
how are speed and distance similar?
Answer:
When an object moves in a straight line at a steady speed, we can calculate its speed if we know how far it travels and how long it takes. This equation shows the relationship between speed, distance traveled and time taken: Speed is distance divided by the time taken.
Explanation:
Thats what goog.le said so if its wrong blame G O O G L E
What is the voltage across resistor #2? (must include unit - V)
Answer: 120V
Explanation: In a parallel circuit, the voltage is the same and resistance doesn't matter.
Speed velocity and acceleration escape room
Answer:
The speed velocity and acceleration escape room is an immersive experience for your students. It allows them to demonstrate their knowledge of these principles in a fun and engaging way. Speed Velocity Acceleration Escape Room - Single Student DIGITAL Version
Explanation:
A force of 12 N is applied to a ball which has a mass of 6 kg. What is the acceleration of the ball?
Answer:
The acceleration of the bowling ball is
1.875 m/s2
Body types can be described as _____ (check all that are correct)Immersive Reader
(1 Point)
apple
pear
rectangle
hourglass
stump
oblong
lean
body builder
How high should a box of mass 20kg is lifted to store energy of 10,000 J? (g=10m/s)
Answer:
Height, h = 50 meters.
Explanation:
Given the following data;
Mass = 20kg
Potential energy = 10,000 J
Acceleration due to gravity, g = 10m/s²
To find the height of the box;
Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
[tex] P.E = mgh[/tex]
Where,
P.E represents potential energy measured in Joules.m represents the mass of an object. g represents acceleration due to gravity measured in meters per seconds square. h represents the height measured in meters.Substituting into the formula, we have;
10000 = 20*10*h
10000 = 200h
Height, h = 10000/200
Height, h = 50 meters.
RUE or FALSE: Red hair and freckles is a helpful (good) mutation.
Steady slow of electrons?
Answer:
????????....???????? :/
A wave has a wavelength of 5m and frequency of 5 Hz. What is the speed of the wave?
Heat from a fire is transferred as the air warmed by the fire rises. Which type
of heat transfer is occurring?
A. Refraction
O B. Covection
O C. Conduction
D. Radiation
WILL AWARD BEST ANSWER! find the current flowing across the 30 ohm resistor
i = _ a
0.143 A
Explanation:
The total resistance of the circuit is
[tex]r = \frac{(40)(30)}{40 + 30} + \frac{(50)(20 + 10)}{50 + (20 + 10)} \\ = 35.89 \: ohms[/tex]
so the total current is
Itotal= V/R = 9V/35.89 ohms
= 0.25 A
To find the voltage drop across the 30-ohns resistor, use
V = Itotal × (combined resistance of 40 30)
= 0.25 A × 17.14 ohms = 4.285 volts
so the current through the 30-ohm resistor is
I = (voltage drop)/30-ohms
= (4.285 V)/(30 ohms)
= 0.143 A
For a parallel circuit the voltage across each resistor is the same. Therefore, the voltage drop across the 30 Ω resistor is 9V. Then, the current through this resistor is 0.3 A.
What is resistance ?Resistance is the hindrance to the flow of current through a circuit. It is expressed in Ohms. Resistance and current are in inverse proportion. According to Ohm's law, the product of current and resistance is the voltage across the circuit.
V = I R
There are two type of circuits parallel and series. Parallel circuits connects each components in parallel fashion where, the current through each one will be different and voltage is constant.
In a series circuit, the voltage drop across each component is different but the current is the same.
Here, the resistors are connected in a parallel fashion. Hence the voltage drop across each resistors will be 9 V itself.
then current across 30 Ω resistor is:
I = V/R
= 9 v/ 30 Ω
= 0.3 A.
Therefore, the current through the resistor of 30 Ω is 0.3 A.
Find more on Ohm's law;
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congugar verbos en primera persona del singular
i’ll give brainliest!! please help and answer correctly! plsss answer quick
Answer: The motion of the object will remain the same
Explanation:
Given that R1 is 13 Ω, R2 is 10 Ω, and R3 is 4 Ω, what is the current coming out of the 9-V battery? What is the power dissipation of each resistor?
For each 1 degree Celsius that temperature incileases, the speed of
sound ___ by 0.6 m/s.
Answer:
A: For each 1 degree Celsius that temperature decreases, the speed of sound decreases by 0.6 m/s. So sound travels through dry, -20 °C air at a speed of 319 m/s
Explanation:
What percentage of stars do kepler scientists suggest host earth size planets?
A. 15.9%
B. 2.6%
C. 10.2%
D. 5.4%
Please select the word from the list that best fits the definition
Creates an image that is reflected through a focal point
A) Plane mirror
B) concave mirror
C) diffuse reflection
D) Specular reflection
Pls help :'(
Answer: the answer is B) Concave mirror
Explanation:
Fill in the term that completes the statement. The north and south poles of a magnetic field produced by an electromagnet will switch when the direction of the changes.
Answer:
when the direction of the Current changes.
Explanation:
Electromagnet refers to an iron ore wrapped around with a coil of wire, in presence of electric current. As it acts like a magnet, when current is passed through it.
The north & south poles of magnetic fields produced by such magnet, change with direction of current passed through it.
Answer:
current
Explanation:
edge2021
Determine the orbits period of the moon when the distance between the earth and the moon is 3.82 x 10 to the power of 8
Answer
From
V=Distance/time
The distance round a circular path or Object is 2πr
so
v=2πr/T
Making T(period) subject
T=2πr/v
where v is the linear velocity.
We don't have the velocity but we can get it.
The Moon and Earth exert gravitational force on each other and the Moon is kept in Orbit by Centripetal force.
Since the Moon doesn't fly out of Orbit... it must mean that the Gravitational force being exerted on it by the Earth is equal to its centripetal Force.
Equating Both (Fg=Fc)
Fg=GMm/R²
Fc=mv²/r
GMm/R² = mv²/R
Canceling out "m" and "r" on both sides
we're left with
V²=GM/R
V=√GM/R
Where M= Mass of Earth (5.98x10^24)
R=Distance between the center of earth and the Moon
G= Gravitational Constant(Value 6.67x10^-11)
V=√6.67x10^-11 x 5.98x10^24/(3.82x10^8)
V=1021.84meters per second.
Now
T=2πr/v
=2π x 3.82x10^8 / 1021.84
T=2.35x10^6seconds
Converting to days by dividing by(24 x 3600)
You have
T=27.2days approx.
✅✅✅
A bicycle possesses 1000 units of momentum. What would be the bicycle's momentun if,it's velocity is doubled?
Explanation:
p = mv ---> let v --> 2v (velocity is doubled) then
p' = m(2v)
= 2(mv)
= 2p
so the momentum also doubled
Two resistors, R1 and R2, are
connected in parallel. R1 = 35.0
ohms, and the equivalent resistance
of the combination is 14.5 ohms.
What is the value of R2?
(Unit = ohm)
Answer:
The value of R₂ is equal to 24.75 ohms.
Explanation:
Given that,
Two resistors, R₁ and R₂, are connected in parallel.
The equivalent resistance is 14.5 ohms
We need to find the value of R₂.
When two resistors are connected in parallel. The equivalent resistance is given by :
[tex]\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}\\\\\dfrac{1}{14.5}=\dfrac{1}{35}+\dfrac{1}{R_2}\\\\\dfrac{1}{R_2}=\dfrac{1}{14.5}-\dfrac{1}{35}\\\\\dfrac{1}{R_2}=0.04039\\\\R_2=\dfrac{1}{0.04039}\\\\R_2=24.75\ \Omega[/tex]
So, the value of R₂ is equal to 24.75 ohms.
Read the list of phrases from the article.
1. biotic potential
2 carrying capacity
3. growth characteristics
4. population density
Why did the author include these phrases in the article?
(A)
to provide readers with population biology terms that they are likely to be familiar with
(B)
to persuade readers that population biology is an urgent and relevant issue
(C)
to create an enthusiastic tone about the study of population biology
(D)
to establish an understanding of key concepts relating to population biology
Answer:
(D)
to establish an understanding of key concepts relating to population biology
Explanation:
Thats what I would go with but I didn't read the article so I don't know what context was used. Good luck! :)
A particle moves along the x-axis so that at any time t≥0 its position is given by x(t)=12(a−t)2, where a is a positive constant. For what values of t is the particle moving to the right? The particle is moving to the right only if 0
Answer:
The particle moves to the right when 0 ≤ t < a
Explanation:
Since at any time t≥0 its position is given by x(t) = 12(a−t)², the particle moves to the right if x(t) > 0
So, x(t) > 0 ⇒ 12(a−t)² > 0 ⇒ (a−t)² > 0
So, (a−t)² > 0
taking square-root of both sides, we have
√(a−t)² > √0
⇒ (a−t) > 0
⇒ a > t
Since t ≥ 0 ⇒ a > t ≥ 0 ⇒ 0 ≤ t < a
So, the particle moves to the right when 0 ≤ t < a
What is the speed of light (f = 5.09 E14 Hz) in glycerol?
Answer:
The speed of light in glycerol is 2.04×108 m/s .
Explanation:
The speed of light in glycerol will be 2.03 ×10⁷ m/sec. The speed of light is found as the ratio of the speed of light in air and the refractive index.
What exactly is the Refractive Index?The level of bending of a light beam as it goes from one medium to another is known as the refractive index of the medium.
The frequency of the wave is given as;
[tex]\rm f = 5.09 \times 10^{14} Hz[/tex]
The refractive index of ethyl alcohol is n=1.4722
The substance's index of refraction yields the ratio of light speed in a vacuum to light speed in that medium, the speed of light is sound as;
[tex]\rm n = \frac{C}{v} \\\\ \rm v = \frac{C}{n} \\\\ \rm v = \frac{3 \times 10^8}{1.4722} \\\\ v= 20377660.00\ m/sec \\\\ v= 2.03 \times 10^7 m/sec[/tex]
Hence, the speed of light in glycerol will be 2.03 ×10⁷ m/sec.
To learn more about the refractive index, refer to the link;
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Please Hurry!!!!!!!! No Links Just Real Answers!!!!!!!!
Develop a Model to Show the Release or Absorption of Energy from a Chemical Reaction System
In this project, you will develop a model of a chemical reaction that either releases energy or absorbs energy. Whether a reaction releases or absorbs energy depends on the overall difference in the bond energies of the reactants and products. Your model should show the relationships between the parts of the system. These parts are the molecules and atoms that take part in the reaction. The model should also distinguish the reaction system from other systems.
Background
Atoms are the basic units of the types of matter known as elements. Very few elements exist in nature as single atoms. Most elements exist as atoms joined together into compounds by chemical bonds. During a chemical reaction, bonds are broken, atoms are rearranged, and new substances with new bonds form. Energy must be absorbed in order to break bonds, and energy is released when bonds form.
For any given compound, the amount of energy that will break its bonds and the amount released when the same bonds form are the same. For example, 1 mole of water molecules must absorb 1,840 kJ of energy for its bonds to break. And, when 1 mole of new water molecules form, the same amount of energy (1,840 kJ) is released. The amount of energy needed to break or form
1 mole of a certain type of bond is called bond energy.
As a reaction proceeds, the total bond energy of the reaction system changes. The total change in the bond energy depends on two factors:
1) the energy absorbed by the initial molecules (reactants) in order to break their bonds, and
2) the energy released as the bonds in the molecules that result (products) form.
For example, if breaking the reactants' bonds requires less energy than is released as the bonds of the products form, then the chemical reaction releases energy. This is what the graph on the left below shows. A chemical reaction that releases energy overall is called an exothermic reaction. If breaking the reactants' bonds requires more energy than is released as the bonds of the products form, then the chemical reaction absorbs energy. This is what the graph on the right below shows. A chemical reaction that absorbs energy overall is called an endothermic reaction.
The graph on the left shows a reaction system whose bond energy decreases. The graph on the right shows a system whose bond energy increases. So, the overall difference in the bond energies of the reactants and products determines whether the system absorbs or releases energy overall.
You will need to work with your teacher to develop your model. You can model either an exothermic reaction or an endothermic reaction. Materials needed should be readily available to you. After plans for your model are approved, you will need to build and use your model. This will enable you to determine how well your model works. You should then make changes, if necessary so that your model more accurately describes the chemical reaction system.
Part I: Develop a Plan for Your Model (20 points)
1. Research atoms, chemical bonds, chemical reactions, and molecules. As part of your research, find ways that other people have modeled chemical reactions. Summarize your research. Use your summary to develop a plan to create a model showing that the release or absorption of energy from a chemical reaction system depends on the changes in total bond energy. (13 points)
2. Write a brief description of the project you will do. Your description should include these parts: (7 points)
- A descriptive title
- An introduction that describes models and what they are being used for in this project
- A review of scientific research related to your topic
- A step-by-step procedure that describes the methods and materials for developing and using the model
- Any limitations of your model
- A description of how you will evaluate your model
- References
Answer:
Explanation:
1. Title: Lithium ion battery as an energy source
2. Lithium ion battery provides energy through chemical reaction. Inside the battery, Lithium metal loses an electron as it reacts with acid and forms a Lithium salt solution. The total bond energy of Lithium salt is less than the Lithium metal with its electron. So energy is given out as electricity and heat. The chemical reaction is an exothermic reaction.
By connecting the battery to a music player, the battery will power up the player, turning electricity into sound energy.
The graph represents the reaction 2H20 + 02->2H2O2 as it reaches
equilibrium. Based on the graph, which two statements about this réaction
are true?
Answer:
At point 3, the reactants and products reach their equilibrium concentrations.
At point 1 the reaction proceeds mostly in the forward direction.
Explanation:
Qué esperas que pase cuando las partículas alfa de poca energía se acerquen a un núcleo con muchos protones?
Answer:
Sufrirá una deflección en su recorrido.
Explanation:
Las partículas alfa son nucleos de He (dos protones mas dos neutrones), por lo tanto tienen una carga neta positiva.
Ahora, al acercarse al nucleo de un átomo con muchos protones y con baja energía, la partícula alfa sufrirá una deflección en su recorrido debido a las fuerzas de repulsión electrostática que siente la partícula, ya que el nucelo posee caraga positiva.
Espero te haya sido de ayuda.
is this a benefit? because isn’t burning fossil fuels a bad thing?
Answer:
yes its benefit
Explanation:
using fossil fuel is bad so this is good because they aren't using it
Which of the following statements is true?
1.Heat is transferred in solids by convection.
2.Both liquids and gases are fluids.
3.Temperature is the same as heat.
4.Objects moving through air don't experience friction.