Answers
Answer:
Electrical energy; chemical energy.
Explanation:
Energy can be defined as the ability (capacity) to do work. The various forms of energy are solar energy, electrical energy, chemical energy, thermal energy, wind energy, nuclear energy etc.
In this scenario, electrical energy is present in the charger and the cable while we have chemical energy in the battery of the mobile phone.
The Law of Conservation of Energy states that energy cannot be destroyed but can only be transformed or converted from one form to another.
This ultimately implies that, the electrical energy in the charger and cable is used to charge the battery of the mobile phone as chemical energy.
Related Questions
Suppose A=B^nC^m, where A has dimensions, LT, B has dimensions L^2T^-1 and C has dimensions LT^2. Determine the dimensions of n and m values.
Answers
Answer:
n = 1/5 and m = 3/5
Explanation:
The given quantity is :
[tex]A=B^nC^m[/tex]
Where
The dimension of [A] = [LT]
The dimension of [B] = [L²T⁻¹]
The dimension of [C] = [LT²]
We need to find the dimensions of n and m values.
Using dimensional analysis,
[tex][LT]=[L^2T^{-1}]^n[LT^2]^m\\\\\ [LT]=L^{2n}T^{-n}\times L^mT^{2m}\\\\\ [LT]=L^{2n+m}T^{2m-n}[/tex]
Comparing both sides,
2n+m=1 ....(1)
-n+2m=1 ,.....(2)
Solving (1) and (2), we get :
n = 1/5 and m = 3/5
Hence, this is the required solution.
Temperature is independent of mass
A- True
B- False
Answers
Answer:
False. Temperature is independent of volume
Answer: the answer False sorry if its wrong
Explanation: have a nice day\night buddy
Kepler's second law states that a line from the sun to a planet sweeps out equal areas in equal times. 2 d coordinate system with an elliptical orbit of planet around the sun. The elliptical orbit is centered at the origin. The Sun is located on the x axis between the origin and the far left edge of the orbit. The Planet is on the orbital path in the first quadrant and has a velocity vector that is pointing counter-clockwise on the orbital path. There is a line connecting the sun and the planet. The Perihelion is marked as the point where the orbit crosses the x axis closest to the Sun. The Aphelion is marked as the point where the orbit crosses the x axis farthest away from the Sun. The aphelion is the point in the orbit where the planet is the furthest distance from the sun, The perihelion is the point at which the planet is closest to the sun. At which point must the speed of the planet be greater
Answers
Answer:
the speed is higher in the PERIHELIUM
Explanation:
As stated in your statement, Kepler's second law says that a vector from the sun to the planet also sweeps equal in equal times. This is a consequence that the sun-planet system is isolated, therefore the angular momentum is conserved.
L = r x p = m r x v
where m is the planet mass and the Sun is considered fixed
Let's analyze this expression, if the anglar momentum is a constant when r is less (perihelion) the speed must increase, so that the product remains fixed
So the speed is higher in the PERIHELIUM
Light bends when it changes the medium because the dielectric permittivity of the material makes the path more hard to penetrate
Answers
Answer:
The statement is true
Explanation:
The complete question is
Light bends when it changes the medium because the dielectric permittivity of the material makes the path more hard to penetrate
True or False
Solution
The given statement is true as it is the dielectric permittivity of the material which does not allow light to pass through it easily.
The medium decrease the amplitude of light and hence induces change in direction without altering its velocity or frequency.
What is Newton’s 3rd Law of Motion?
a. Name an example and be sure to tell HOW it demonstrates the law.
Answers
Answer:
His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.
Explanation:
Ryan runs 50 m north and then 50 m east. What is his displacement?
O 100 meters, northeast
O 5000 meters, northeast
O 71 meters, northeast
O 50 meters, north
Answers
Answer:
Explanation:
Distance and direction of an object's change in position from a starting point. Displacement. 3. Jermaine runs exactly 2 laps around a 400 meter track. What is the displacement? 0 ... David walks 3 km north, and then turns east and walks 4 km. ... A person walks 50 meters directly north, stops, and then travels 32 meters
Renewable energy resources like solar energy and wind power are still too expensive to be practical on a large scale. True or False?
Answers
Answer: False
Explanation:
hurry help me pls !!!!!
Which is a layer of sedimentary rock that forms in moving waters in shallow areas?
A. limestone
B. salt
C. sandstone
D. shale
Answers
Answer:
A. limestone
Explanation:
Limestone is usually a biological sedimentary rock, forming from the accumulation of shell, coral, algal, fecal, and other organic debris. It can also form by chemical sedimentary processes, such as the precipitation of calcium carbonate from lake or ocean water.
Redox reactions include which types of reactions?
A. Single-replacement, double-replacement, acid-base, synthesis
B. Single-replacement, synthesis, decomposition, combustion
C. Acid-base, decomposition, double-replacement, synthesis
O D. Double-replacement, combustion, synthesis, decomposition
Answers
Answer:Single-Replacement, synthesis, decomposition, combustion.
Explanation:
Had to get it wrong to find out
Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions. Hence option B is correct.
What is redox reaction ?Redox reaction is type of reaction in which oxidation number participating molecules changes. Redox reaction involves two types of the reaction oxidation and reduction. these two reaction take place simultaneous. Oxidation is the loss of electrons and reduction is the gain of electrons.
Oxidation is nothing but addition of oxygen and loss of hydrogen and reduction is loss of oxygen and gain of hydrogen.
Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions.
The oxidation half-reaction is: H₂ → 2H⁺ + 2e⁻
The reduction half-reaction is: F₂ + 2e⁻ → 2F⁻
Hence option B is correct.
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A volleyball of mass 0.28 kg is dropped from the top of the bleachers (height equals 12 m). What is the speed of the volleyball right before it hits the gym floor?
Answers
Answer:
hope this help pls give me brainless
The speed of the volleyball with a mass of 0.28 kg and height of 12 m will be 15.336 m/s.
What is Speed?
Speed is the rate of change of distance of an object with respect to time. Speed is a scalar quantity as it has only magnitude and no direction. The SI unit of speed is meter per second (m/s).
PE = KE
Potential Energy = Kinetic energy
mgh = 1/2 mv²
where, m is the mass of object,
g is the acceleration due to gravity,
h is the height of the object,
v is the speed of the object
gh = 1/2v²
2gh = v²
v = [tex]\sqrt{2gh}[/tex]
v = [tex]\sqrt{2(9.8)(12)}[/tex]
v = [tex]\sqrt{235.2}[/tex]
v = 15.336 m/s
Therefore, the speed of the volleyball will be 15.336 m/s.
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PLEASE HELP !!!
Which types of decay cannot result in transmutation of the parent nucleus
A) gamma only
B) alpha and beta
C) alpha only
D) alpha and gamma
Answers
Gamma decay cannot result in the transmutation of the parent nucleus. Therefore, option (A) is correct.
What is Gamma Decay?Gamma decay can be described as the emission of electromagnetic radiation of a high frequency that is a high energy, giving out excess energy to stabilize the unstable nucleus. Gamma rays can be defined as a stream of high-energy radiation given off by a nucleus undergoing radioactive decay.
Gamma decay can be described as the nucleus dropping from a higher energy level to a lower energy level through the emission of high-energy photons.
Therefore, the gamma-ray emitted is also of very high energy, just like x-rays. Due to their high energy of gamma rays, they are penetrating and thereby dangerous to biological life forms.
In the transmutation of an element, one element is converted into another element. In gamma decay, the transmutation of the parent nucleus does not take place. As the gamma-ray high-energy particles are represented as ⁰γ₀.
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A monochromatic ray of light (f = 5.09 x 1014 Hz) travels from air into medium X. The angle of incidence of the ray in air is 45.0° and the ray's angle of refraction in medium X is 29.0°. Calculate the absolute index of refraction of medium X. [Show all work, including the equation and substitution with units.]
Answers
Answer:
n₂ = 1.459
Explanation:
This is a refraction exercise
n₁ sin θ₁ = n₂ sin θ₂
where n₁ and n₂ are the refractive indices of the incident and refracted medium, respectively
In the exercise they indicate that the incident medium is the air that has a refractive index n1 = 1
n₂ = n₁ [tex]\frac{sin \ \theta_1 }{sin\ \theta_2 }[/tex]
let's calculate
n₂ = 1 [tex]\frac{ sin \ 45}{sin \ 29}[/tex]
n₂ = 1.459
The absolute index of refraction of the medium X in which the monochromatic ray of light enters from air is 1.459.
What is Snell's law?According to the Snell's law, the ratio of index of reflection of the different material is equal to the ratio of incident sine angle and reflective sine angle. It can be given as,
[tex]\dfrac{n_1}{n_2}=\dfrac{\sin\theta_2}{\sin\theta_1}[/tex]
Here (n₁ and n₂) are the index and reflective index and (θ₁ and θ₂) are the incident and reflected angle.
A monochromatic ray of light (f = 5.09 x 1014 Hz) travels from air into medium X.
The angle of incidence of the ray in air is 45.0° and the ray's angle of refraction in medium X is 29.0°.
As, it is known that the index of reflection of air is 1. Thus, by the Snell's law, the absolute index of refraction of medium X is,
[tex]\dfrac{1}{n_x}=\dfrac{\sin(29)}{\sin(45)}\\n_x=1.459[/tex]
Thus, the absolute index of refraction of the medium X in which the monochromatic ray of light enters from air is 1.459.
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Which of the following is true about inertia
Select the correct response:
O It is not related to the mass of an object
It can be calculated by dividing distance by time
It is the resistance of an object to changes in its motion
It is a force
Answers
Answer:
The correct answers are It is the resistance of an object to changes in its motion, and It is a force
PLEASE HELP - In running a ballistics test at the police department, Officer Rios fires a 6.1g bullet at 350 m/s into a container that stops it in 0.32 min. What average force stops the bullet?
Answers
Answer:
–0.11 N.
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 6.1 g
Initial velocity (u) = 350 m/s
Time (t) = 0.32 mins
Final velocity (v) = 0 m/s
Force (F) =?
Next, we shall convert 0.32 mins to seconds. This can be obtained as follow:
1 min = 60 s
Therefore,
0.32 mins = 0.32 × 60 = 19.2 s
Next, we shall determine the acceleration of the the bullet. This can be obtained as follow:
Initial velocity (u) = 350 m/s
Time (t) = 19.2 s
Final velocity (v) = 0 m/s
v = u + at
0 = 350 + (a × 19.2)
0 = 350 + 19.2a
Collect like terms
0 – 350 = 19.2a
–350 = 19.2a
Divide both side by 19.2
a = –350 / 19.2
a = –18.23 m/s²
Next, we shall convert 6.1 g to Kg.
1000 g = 1 Kg
Therefore,
6.1 g = 6.1 g × 1 Kg / 1000 g
6.1 g = 0.0061 Kg
Finally, we shall determine the force. This can be obtained as follow:
Mass (m) = 0.0061 Kg
Acceleration (a) = –18.23 m/s²
Force (F) =?
F = ma
F = 0.0061 × –18.23
F = –0.11 N
NOTE: The negative sign indicates that the force is in opposite direction.
Answer:
–0.11 N.
Explanation:
Hope this helps
Please solve Question 10
Answers
Answer:
Time = 0.6secs
Explanation:
10) Distance = speed * time
Given the following
Distance = 204m
Speed/velocity = 340m
Get the time
Time = distance/velocity
Time = 204/340
Time = 0.6secs
A wave is introduced into a thin wire held tight at each end. It has an amplitude of 3.8
cm, a frequency of 51.2 Hz and a distance from a crest to the neighbouring trough of
12.8 cm. Determine the period of such a wave.
this is in my physics I haven't touched on waves in so long. just can't figure it out could someone help me?
Answers
Explanation:
[tex]period = 1 \div frequency[/tex]
frequency is given
calculate the time period from this
If you slow the motion of water molecules down, they are more likely to become
A)
a gas
B)
hotter
O
colder
D
absorbed
Answers
Can anyone help me!!!
I need this really soon!!!!
Q. Rama's weight is 40kg . She is carrying a load of 20 kg up to a height of 20 metres. What work does she do? Also mention the type of work
Also show step by step explanation. please!!
No links!!!!
No spams!!!!
Answers
Answer:
W = 1,176 10⁴ J
Explanation:
Work is defined by
W = F . d
bold indicates vectors
W = F d cos θ
In this case we must find the force to raise the load and the branch, suppose that the rate of rise is constant, this is the most common case
Σ F = 0
F - W₁ - W₂ = 0
where W1 is the weight of the branch and w2 wl weight of the load
F = (m₁ + m₂) g
This force is directed upwards and the displacement is upwards, therefore the angle is zero and the cos 0 = 1
we substitute in the work equation
A = (m₁ + m₂) g d
let's calculate
W = (40 + 20) 9.8 20
W = 1,176 10⁴ J
This is the work done by the external force
Please help me!!!
The prompt says
Write a scientific explanation that relates the amplitude of the wave to the energy of the wave
Answers
do the planets orbit the sun in a perfect circle
Answers
Answer:
All the planets in the Solar System orbit the Sun. When planets orbit the Sun, they don’t move around in a perfect circle. They all follow an 'elliptical path', meaning it looks more like an oval.
Explanation:
Answer:no planets orbit the sun in a perfect circle because they travel in a slightly elliptical orbit
Explanation:
GODDAMITT HELPPPPPP ! Plz.
Answers
Un coche que lleva una velocidad constante de 90 km/hora durante 2 horas ¿Cuánto espacio recorre?Si encuentra un obstáculo en la carrera y tiene que parar 10 segundos calcula la aceleración
Answers
Answer:
(i) El coche recorre 180 kilómetros.
(ii) El coche decelera a razón de 2.5 metros por segundo al cuadrado.
Explanation:
El problema se divide en dos partes. La primera es el coche viajando a velocidad constante y la segunda consiste en una decelaración hasta alcanzar el reposo.
Primera parte - Viaje a velocidad constante
La distancia recorrida por el coche se calcula mediante la siguiente ecuación cinemática:
[tex]x = v\cdot t[/tex] (1)
Donde:
[tex]x[/tex] - Distancia recorrida, en kilómetros.
[tex]v[/tex] - Velocidad, en kilómetros por hora.
[tex]t[/tex] - Tiempo, en horas.
Si sabemos que [tex]v = 90\,\frac{km}{h}[/tex] y [tex]t = 2\,h[/tex], entonces la distancia recorrida por el coche es:
[tex]x = v\cdot t[/tex]
[tex]x = 180\,km[/tex]
El coche recorre 180 kilómetros.
Segunda parte - Deceleración
Asumiendo que la deceleración del coche es constante, se determina mediante la siguiente ecuación cinemática:
[tex]a = \frac{v-v_{o}}{t}[/tex] (2)
Donde:
[tex]v_{o}[/tex] - Velocidad inicial, en metros por segundo.
[tex]v[/tex] - Velocidad final, en metros por segundo.
[tex]t[/tex] - Tiempo, en segundos.
Si sabemos que [tex]v_{o} = 25\,\frac{m}{s}[/tex], [tex]v = 0\,\frac{m}{s}[/tex] y [tex]t = 10\,s[/tex], entonces la deceleración experimentada por el coche es:
[tex]a = -2.5\,\frac{m}{s^{2}}[/tex]
El coche decelera a razón de 2.5 metros por segundo al cuadrado.
Mr. Weismann was climbing on his roof attempting to fix his gutter system. Without looking he accidentally stepped off. Lucky for him the roof was only 6 meters off the ground (About 20 feet). He fell with the speed of gravity. How long did it take Mr. Weismann to hit the ground?
Plz Helpp me!! No time left
Answers
Answer:
it took him exactly 2.3 seconds to fall down
Explanation:
20/6[tex]\int\limits^a_b {x} \, dx[/tex]14↑A substance has a freezing point of -36 degree C and a boiling point of 356 degree C. At what temperature would this substance be in its liquid state?
Answers
Answer:
Between -35 degrees C and 355 degrees C
Explanation:
At any temperature between, but not including the freezing and boiling points, the substance would be in its liquid state.
The image above shows a raging mountain river in full flood. What do you think is making the water brown in color?
Answers
Answer:
FloodPlains
Explanation:
The floodplains mix with the dirt in the water in which then makes it brown. You're welcome:)
The floodplain is making the water brown in color.
A flood plain area can be defined as a specific land area prone to be flooding.Floodplain areas are often found in the coastline of streams and/or rivers.The brown color is due to the presence of soil that mixes with water.In conclusion, the floodplain is making the water brown in color.
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When electrons are shared unequally a/an
bond is formed
Answers
This was merely an accident and I did not mean to post a question.
Answers
Answer:
ok a good rest of your day
Explanation:
In running a ballistics test at the police department, Officer Rios fires a 6.1g bullet at 350 m/s into a container that stops it in 0.32 min. What average force stops the bullet?
Answers
Answer:
–0.11 N.
Explanation:
Hope this helps
8.How long is a day? A year?
Answers
Answer:
24 hours. 365 days
Explanation:
In a sea community near the floor of the ocean, a great white shark summons a goby fish to attach itself under its stomach. The goby receives vital nutrition from what it eats off the shark. At the same time, the shark gets a cleaning from the goby.
In this scenario, what type of relationship do these two organisms have?
a. mutualism
b. commensalism
c. parasitism
Answers
Answer:
Commensalism
Explanation:
Commensalism is one example of the behavior of a goby and shark.
Answer: B
Explanation:Commensalism is a long-term biological interaction in which members of one species gain benefits while those of the other species neither benefit nor are harmed.
Examples of Commensalism
Remora fish have a disk on their heads that makes them able to attach to larger animals, such as sharks, mantas, and whales. ...
Nurse plants are larger plants that offer protection to seedlings from the weather and herbivores, giving them an opportunity to grow.
Tree frogs use plants as protection.