Physics High School
Answers
Answer 1
Answer:
Equivalent Resistance of Resistors in Parallel is
1/R = 1/r1 + 1/r2 .....
1/R = 1/7 + 1/7 + 1/7
R= 7/3
R=2.33ohms
Related Questions
If all your cells were the same, could you still do everything you do now?
Explain.
Answers
Answer:
No, you couldn't function the same as you do now.
Explanation:
This is because each cell follows individual tasks, and makes up specific parts of a body. For example, if all of your cells were those of an eye, you would be missing the components of arms, legs, etc.
Answer: No
Explanation: If all the cells of our body were of the same size, shape and volume, then they would all perform the same function and the multitude of other important functions cannot be carried out, without which human life itself would not be possible.
Demuestre que la función de onda: y(x, t) = A e^−i(kx−ωt+φ) satisface la ecuación de onda lineal. (donde i =√−1).
Answers
Answer:
La ecuación de onda lineal para una función f(x, t) se escribe como:
[tex]\frac{d^2f}{dt^2} = c^2*\frac{d^2f}{dx^2}[/tex]
Donde c es una constante que depende de la velocidad de propagación de la onda.
En este caso, tenemos:
[tex]f(x) = A*e^{-i*(k*x - w*t + \phi)}[/tex]
Recordar que la derivada de la exponente es tal que:
[tex]k(x,y) = A*e^{c*x + n*y}\\dk/dx = c*A*e^{c*x + n*y}[/tex]
Entonces las derivadas de f van a ser:
[tex]\frac{df}{dt} = (i*w)*f(x)[/tex]
[tex]\frac{d^2f}{dt^2} = (i*w)^2*f(x) = -(w)^2*f(x)[/tex]
[tex]\frac{df}{dx} = (-i*k)*f(x)[/tex]
[tex]\frac{d^2f}{dx^2} = (-i*k)^2*f(x) = -k^2*f(x)[/tex]
Entonces podemos reescribir la ecuación de onda como:
[tex]\frac{d^2f}{dt^2} = c^2*\frac{d^2f}{dx^2}[/tex]
[tex]-(w)^2*f(x) = c^2*(-k^2*f(x))[/tex]
Ahora podemos simplemente definir c^2 = (w/k)^2 y vemos que la ecuación de onda se cumple.
What is the speed of the Curiosity Rover if it travels 10,000 ft. in 25 hours? *
400 m/s²
400 ft./hr
250,000 ft./hr
250,000 m/s²
Answers
I think it’s 250,000 ft./hr
The speed of light in a piece of plastic is 1.87 × 10^8 meters per second. What is the absolute index of refraction of this plastic?
Question 11 options:
1.00
1.6
0.67
1.33
Answers
[tex]\tt\red{See \; Your \: Answer!}[/tex]
Your answer was 0.67m...
When two oceanic plate boundaries meet, this crustal feature forms?
A)
sea floor spreading
B)
volcanic island arc
C)
plate tectonics
Answers
The correct answer is B
What would heat up faster and why? Water , wet sand , dry sand , or would it be no difference??
** brainliest **
Answers
In short, I’d say the answer is Dry Sand.
In solids, the intermolecular force of attraction is very high. Whereas, in liquids the intermolecular force of attraction is somewhat less than solids. ... so when you heat, less amount of heat can free the molecules in liquids than solids and hence they heat faster.
I think water it’s a liquid
What is exothermic .Is it a reaction?
Answers
Answer:(of a reaction or process) accompanied by the release of heat.
Explanation: trust moi
Exothermic is a reaction, it is a process that objects or substances go through when releasing heat.
What happens to hotter air in the atmosphere?
A.Warmer air molecules move faster and get farther apart. As they get farther apart, they become more dense and sink.
B.Warmer air molecules move faster and get farther apart. As they get farther apart, they become less dense and rise.
C.Warmer air molecules move slower and spread out. As they spread out, they sink below cooler air molecules.
Answers
B.Warmer air molecules move faster and get farther apart. As they get farther apart, they become less dense and rise.
Define: What is energy transfer
and give me an example how you are planning on using energy transfer.
Answers
Answer:
Energy transferis the movement ofenergyfrom one locationtoanother. Forexample, when electricity moves from a wall plug, through a charger,toa battery. .Whileenergycan betransferredor transformed, the total amount ofenergydoes not change
Energy transfer is the process by which energy is relocated from one system to another, for example, through the transfer of heat, work or mass transfer.
before each item.
1. Which of the following refers to chemical digestion?
A. Chewing of food B.. Grinding of food C. Tearing of food D. Amylase in the saliva
2. In what organ most of the absorption process happen?
A. Stomach B. Small intestine C. Large intestine D. Esophagus
3. It is a digestive disorder wherein the body has the inability to digest sugar?
A. Gastritis B. Lactose intolerance
C. Diarrhea D. Peptic ulcer
4. The following are part of the digestion process EXCEPT
A. ingestion B. assimilation
C. excretion D. respiration
5. It helps to moisten the food and contains the enzyme amylase.
A. Saliva
B. Stomach C. Mouth D. Teeth
6. It is a process of taking in digested food nutrients into the cell by providing new protoplasm and energy
needed during the cell activities.
A. Ingestion B. assimilation C. Absorption D. Excretion
7. What causes constipation?
A. Lack of fiber in the body B. Uncontrolled growth of abnormal cells
C. Lack of enzyme lactase D. Excessive consumption of coffee and acidic drinks
8. The nutrients from the digested food are being absorbed by the following processes except
A. passive diffusion B. facilitated diffusion C. active transport D. ingestion
9. It is the organ that is responsible for reabsorbing water and minerals that are not digested in the small
intestine.
A. Stomach B. Large intestine C. Small intestine
D. Esophagus
10. The following are the reasons why digested food should be assimilated into the cell EXCEPT
A. they are converted into protoplasm. C. they provide energy needed in cell activities
B. they are needed to store fats. D. they are converted to build cell membranes
11. What is the best treatment for a person who suffers lactose intolerance?
A. Take antibiotics
B. Balanced diet
C. Take lactase supplements before eating food contains dairy D. Practice healthy lifestyle
12. What happen during the assimilation process?
A. Absorbed nutrients are delivered into the cell
B. Breaking down of food into tiny pieces
C. Elimination of waste product of the digestion process D. Absorption of nutrients from the digested food
13. How does the enzyme amylase help in the absorption of nutrients?
A. It helps in the digestion of proteins.
B. It helps in the digestion of fats.
C. It helps in the digestion of carbohydrates. D. It helps in the digestion of lipids.
14. It is characterized as loose bowel caused by an infection of bacteria that we get from the food we eat.
D. GERD
A. Diarrhea
C. Gastritis
B. Peptic Ulcer
15. How saliva helps in the digestion process?
A. It reabsorbs nutrients from the food we eat.
B. It contains the enzyme amylase that helps in the digestion of starch.
C. It absorbs nutrients and distribute it in the bloodstream.
D. All of the above
16. How colon cancers can be treated?
B. By exercising
A. By eating foods rich in fiber
D. By undergoing surgeries.
g C. By taking lactase supplements
Answers
Answer:
1:D
2:B
3:B
4:D
5:A
13:A
14:A
15:B
16:A
7:A
9:B
8:B
11:C
12:A
Explanation:
Sorry for incomplete answers
PLEASE ACTUAL HELP NO SPAMS OR FALSE ANSWERS
First, evaluate these three models. One represents fission, one fusion, and one radioactive decay. Write three sentences about each one according to the following framework:
---State what reaction the model represents, including what it demonstrates about mass and/or energy.
---State whether you think the model accurately represents the reaction. Explain why or why not.
---Suggest one way to improve the model.
Model A: Two sponge balls representing two atoms are soaked in water. You hold one ball, and your friend holds the other. Then you press the two balls together. As you press them together, water leaks out. What type of reaction does this model represent?
Model B: You draw a tree diagram showing a large atom splitting into two parts and neutrons being released. Your diagram also shows the released neutrons hitting other large atoms, which then each split in two and release more neutrons, which hit more large atoms, and so on. What type of reaction does this model represent?
Model C: You have 100 candies with the letter "M" on one side. You pour the candies into a pan. You count and remove all the candies with the "M" facing upward. Then you shake the pan and again count and remove all the candies with "M" facing upward. You shake, count, and remove candies four more times. What type of reaction does this model represent?
Answers
When energy is transferred from system to surrounding then the corresponding reaction known as exothermic reaction in Modle A when we press the ball(atom) the water(energy) is transferred into surrounding hence it is an exothermic reaction.
When a single atom disintegrate to give two or more atom with radioactive substance then the corresponding reaction know as Nuclear Fission reaction. hence Modle B represents Nuclear fission reaction.
The Model C represents Radioactive decay, So in the given example or model the water is playing role of radiation through which we are removing the candies having M on upside.
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Two boxes are connected by a string. The first box has a mass of 4.2 kg and the
second 2.8 kg. A string attached to the first box pulls horizontally with a force of
7.5 N. Calculate the tension in the second string if the force of friction on the first
box is 2.0 N and the force of friction on the second is 1.6 N.
Answers
Answer:
........
Explanation:
when an object is placed in between two mirrors placed side by side to each other ,5 images were formed. find the angle at which the two mirror were placed to each other
Answers
Answer:
60°
Explanation:
Formula
360/n (if the number is an odd number) or
360/n-1 (if the number is even) (to arrive at an odd number)
SO. 5 is an odd number but not a multiple of 360, so we will use 6 an even number.
360/60-1
360/60=6 images
6-1 =5 images
Thus. the images formed will be 5.
What should you do if your brakes fail? Hook your shoe under the pedal and see if you can free it. Pull the steering wheel back. Turn on your cruise control. Try pumping the brake pedal to increase pressure.
Answers
Answer: Try pumping the brake pedal to increase pressure.
Explanation:
When the brake of a vehicle fails when driving, it's important to pump the brake pedal to increase pressure.
Sometimes, there may be a soft brake due to the fact that the brake master cylinder of the vehicle cannot full pressure which is necessary for the braking power.
One should quickly pump the brake pedal with his or her foot so as to generate enough pressure which will be necessary in stopping safely.
a vibrating source with a frequency of 20.0Hz produces water waves that have a wavelength of 3.0 cm. Calculate the speed of the waves 
Answers
Answer:
60m/s
Explanation:
v=frequency ×wave length
v signifies the speed
The speed of a wave is the product of its frequency and wavelength. Hence the speed of the wave with a frequency of 20 Hz and 30 cm wavelength is 0.6 m/s.
What frequency?
Frequency of a wave is the number of wave cycles produced at unit time. Thus it has the unit of s⁻¹ which is equivalent hertz Hz.
Wavelength of a wave is the distance it travels in a wave cycle or for a transverse wave the distance between two consecutive crests or troughs is called wavelength.
The relation between frequency v, wavelength [tex]\lambda[/tex] and speed of a wave c is written as below:
[tex]c = v \lambda[/tex]
By this expression it is clear that the speed of increases with frequecy and wavelength.
The frequency of the given vibrational source is 20 Hz and the wavelength is 3 cm or 0.03 m. Hence, the speed of the wave is calculates as follows:
c = 20 Hz × 0.3 m
= 0.6 m/s.
Therefore, the speed of the wave is 0.6 m/s.
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EASY BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 100pts-
(if you put links or don't answer accordingly im reporting your account)
Answers
Answer:
solution given:
frequency[f]=215.0Hz
velocity[V]=x
wave length=2.4m
we have
wave length=[tex] \frac{V}{f} [/tex]
2.4m=[tex] \frac{x}{215} [/tex]
2.4×215=[tex] \frac{x}{} [/tex]
x=516 m/s
velocity=speed =516m/s
Answer:
516 m/s
Explanation:
Velocity = Frequency * Wavelength
If wavelength = 2.4m, and Frequency = 215 hz
Then Velocity = 2.4 * 215 which is equal to 516
Hence, velocity = 516 m/s
Can someone help me please??
Which is not true about the role of gravity in the formation of planets?
A. Dust and gas particles that were attracted to each other began to rotate into a protoplanetary disk.
B. Gravity between planetesimals caused them to join together into conglomerate clumps.
C. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
D. Gravity of larger objects in orbit around the sun attracted, and cleared the orbital path of, smaller planetesimals, gas, and dust.
24. ____
Choose the most accurate description of the dimensions of our solar system:
a. The planets are approximately the same size as each other, and orbit at evenly-spaced distances from the sun.
b. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.
c. Rocky planets alternate with gas giants as they orbit at even intervals from the sun
d. Gas planets are small, orbiting relatively close to the sun, while large, dense rocky Giants
orbit the sun at great and varying distances.
25. ____ A new object was discovered in the Kuiper Belt. At 6 billion km from the sun, it could be the newest dwarf planet. How many AU is it from the sun? Use 150,000,000 km as Earth’s orbital distance.
a. 90AU b. 9AU c. 400AU d. 40AU
Answers
1. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
2. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.
3. _______
A projectile is launched from the ground with an initial horizontal velocity of 6.0m/s [right] and an initial vertical velocity of 5.0/s [up]. At what angle from vertical is it launched?
Answers
Answer:
θ = 39.8°
Explanation:
Her, we will use the trigonometric ratio of the tangent to find the launch angle of the projectile from the vertical:
[tex]tan\ \theta = \frac{v_y}{v_x}[/tex]
where,
θ = launch angle from the vertical = ?
vy = vertical component of velocity = 5 m/s
vx = horizontal component of velocity = 6 m/s
Therefore,
[tex]tan\ \theta = \frac{5\ m/s}{6\ m/s}\\\\\theta = tan^{-1}(0.8333)[/tex]
θ = 39.8°
I need help?? Plz help me
Answers
Answer:
12. b
13. a
Explanation:
The answer to your question is
12: b
13: a
Calculate the resistance of a resistor that has a voltage drop of 25 V and a current flow of .5 A.
A. 25 Ohms
B. 50 Ohms
C. 12.5 Ohms
D. 0.02 Ohms
Answers
Answer:
V=IR
25. =0.5 ×RESISTANCE
RESISTANCE=25/0.5
=50 ohms
answer is option B
What happens to the speed and frequency of a light ray when it passes from glass into water?
The speed decreases and the frequency increases.
The speed decreases and the frequency remains the same.
The speed increases and the frequency increases.
The speed increases and the frequency remains the same.
Answers
Answer:
The speed decreases and the frequency remains the same.
Explanation:
Had it for a castle learning assignment, guessed and got it correct.
The speed of a light ray decreases and its frequency remains the same when it passes from glass into water.
What is the speed of light?
The speed of light, also known as the velocity of light, is a fundamental constant of nature and is one of the most well-known physical quantities. It is defined as the speed at which electromagnetic radiation (light) travels through a vacuum, which has a constant value of 299,792,458 meters per second (m/s).
This speed is considered to be the fastest that anything can travel in the universe, and it is a critical component in many physical and biological processes. The speed of light is used in a wide range of scientific and technological fields, including optics, electronics, astronomy, and quantum mechanics. It is considered to be a universal constant and does not change with time, distance, or the medium through which it travels.
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The distance between a charge and the source of an electric field changes from 3 mm to 6 mm.
As a result of the change, the electric potential energy of the charge is ______.
A. divided by 6
B. divided by 2
C. multiplied by 2
D. multiplied by 6
Answers
Answer:
c
Explanation:
The electric potential energy of the charge is divided by 2.
To find the electric potential energy, the values given from the source of an electric field changes from 3 mm to 6 mm.
What is electric potential energy?
The electric potential energy is the energy that is needed to move a charge against the electric field.
The energy can be calculated as Work and these energy can be calculated as a whole not only the charges.
Formula for electric potential energy,
U = KQ²/r
where,
K is the constant, k = 9 × 10⁹
Substituting the values of q as the charges and then the distance can be,
U = KQ² / 3 and U = KQ² / 6
So that, the values can be divided by 2.
The unit of electric potential energy is Joule.
The distance can be from r to ∞.
Hence, Option B is the correct answer.
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How is the gravitational force similar to the electric force?
Answers
Answer:
They are both proportional to the product of their masses and inversely proportional to the square distance between the masses.
8. What kind of information do black hole detectors not provide?
A. precise timing
B. specific positional information
C. photon intensity
D. power of a black hole
Answers
I believe the answer is C
C got it right
100000000000%
Friction _____.
1.happens whenever work is done
2.occurs when objects rub against each other
3.releases energy as heat
4.all of the above
Answers
Answer:
all above
Explanation:
friction is necessary to live
Answer:
All of above
Explanation:
if displacement covered by a particle is zero then distance cover by it
Answers
Answer:
When displacement is zero, the particle may be at rest, therefore, distance travelled = 0.
Again, when displacement is zero, the final position matches with the initial position after some time, but the distance travelled will not be zero.
What is the major function of Eustachain tube of ear?
Answers
Answer:
Explanation:
Eustachian tube is located in between the middle ear and the nasopharynx.It's function is to control the pressure within the middle making it equal to the air pressure outside the body.
Which quantities are scalars?
Answers
Answer:
Speed and distance are examples of scalar quantities.
Answer:
d
Explanation:
easy hope it helps
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Un gallo se pavonea en línea recta en el techo. Su movimiento se muestra en la siguiente gráfica de la posición horizontal, x, contra el tiempo, t. ¿Cuál es la rapidez instantánea del gallo en t= 1s?
Answers
Answer:
Entonces, velocidad instantánea = | v | = 0,25 m / s
Explanation:
pregunta completa
Por favor, encontrar el archivo adjunto
Solución
La velocidad instantánea está dada por,
v = dx / dt = pendiente de la curva x-t
aquí, del gráfico:
en x = 1 m ---> t = 8 s
en x = 3 m ---> t = 0 s
entonces, dx = 1-3 = -2 m
dt = 8-0 = 8 s
Entonces,
v = -2/8
v = -0,25 m / s
Dado que, pseed es una cantidad escalar.
Entonces, velocidad instantánea = | v | = 0,25 m / s
Heyo, im just double checking my answer, please help
Which statement does NOT correctly describe the electric force between two particles?
If they have the same sign, the force will be away from each other; if they have opposite signs, the force will be towards each other
The farther apart they are, the smaller the force will be
The greater each charge is, the more force there will be
If they are moving towards each other, the force will be perpendicular; if they are moving away from each other, the force will be parallel
Answers
Answer:
Option D
Explanation:
Option A is not not correct because it correctly defines the electric force which is repulsive in case of like charges and attractive in case of opposite charges
Option B is also not correct because it is true about electric force
Option C is also not correct as electric forces are always perpendicular
Option D is incorrect as electric forces are not parallel
