Answer:
ELECTRIC POTENTIAL• the amount of work needed to move a unit charge from a reference point to a specific point against an electric field.
If something is 50% efficient, how many joules of wasted energy will there be if 750J of energy is put in?
[tex]\large{{\bold{ \underline{ \underline{ \overline{ \overline{ \red{☆Solution :—}}}}}}}}[/tex]
↪Total energy = 750 J
↪Efficiency = 50%
↪Wasted energy = 50% [ 100% - 50%]
Amount of wasted energy
↦ 750 x 50%
↦ 750 x 0.5
↦ 375 J
8. True or false. A transform boundary formed the Himalaya Mountains.
Answer:
False
Explanation:
A convergent plate boundary formed the Himalaya Mountains.
How is a sound wave made by plucking a guitar string?.
Answer:
Because of the vibration of the string. since it is vibrating it will make the other air molecules vibrate as well and air vibrating is basically a sound wave.
Answer:
A sound wave is produced by a vibrating object
Explanation:
When a guitar string vibrates, it sets surrounding air molecules into motion. The frequency of vibration of these air molecules is the same as that of a guitar string.
You have a small container of solid ice water, H2O, currently in A on the graph. You choose to increase the amount of thermal energy in the system in two steps. In step 1, you add energy so that it goes to B. In step 2, you add energy so that it goes to C. Which choice most accurately describes what you will observe?
(A) In Step 1, you will observe the temperature of the solid water will increase until it gets to B. While in B, the temperature will continue to increase and the solid water will start melting into liquid water. In step 2, the ice water will completely melt so that in C it is all liquid water. The temperature will remain constant while it’s in C.
(B) In Step 1, you will observe the temperature of the solid water will increase until it gets to B. While in B, the temperature will continue to increase and the solid water will start melting into liquid water. In step 2, the ice water will completely melt so that in C it is all liquid water. The temperature will increase if the energy increases while it’s in C.
(C) In Step 1, you will observe the temperature of the solid water will increase until it gets to B. While in B, the temperature will remain constant but the solid water will start melting into liquid water. In step 2, the ice water will completely melt so that in C it is all liquid water. The temperature will increase if the energy increases while it’s in C.
(D) In Step 1, you will observe the temperature of the solid water will remain constant until it gets to B. While in B, the temperature will increase and the solid water will start melting into liquid water. In step 2, the ice water will completely melt so that in C it is all liquid water. The temperature will increase if the energy increases while it’s in C.
Answer:
"In Step 1, you will observe the temperature of the solid water will increase until it gets to B. While in B, the temperature will remain constant but the solid water will start melting into liquid water. In step 2, the ice water will completely melt so that in C it is all liquid water. The temperature will increase if the energy increases while it’s in C."
Explanation:
As per the details given, In Step 1, you will observe the temperature of the solid water will increase until it gets to B. While in B, the temperature will remain constant but the solid water will start melting into liquid water. The correct option is C.
The temperature of solid ice rises as a result of thermal energy absorption until it approaches the melting point (B on the graph).
As the ice turns to liquid water at this moment, the temperature stays the same.
Because the energy is being utilised to break the intermolecular bonds holding the solid structure together rather than increasing the kinetic energy (temperature) of the particles, this phase transition doesn't involve a change in temperature.
Once all of the ice has melted and turned into liquid water (point C on the graph), adding more thermal energy will in fact raise the temperature of the liquid water, increasing both temperature and kinetic energy.
Thus, the correct option is C.
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B. Write True if the statement is correct, False if otherwise
6. When matter solidifies, it turns directly to solid state without passing through the liquid state
7. The particles of an object vibrate slower when it absorbs energy.
8. When the kinetic energy increases, the particles of matter vibrate faster.
9. During evaporation, matter releases energy and loses kinetic energy
10. Freezing occurs when matter absorbs energy.
11. Condensation happens when gaseous matter turns to its liquid state
12. When matter sublimes, it releases energy and turns to gas easily without passing through the liquid state.
13. During deposition and condensation, matter releases energy.
14. Melting is the opposite of freezing.
15. During evaporation and melting, the kinetic energy of the particles of matter increases.
Answer:
6.False
Explanation:
When matter solidifies it first go through liquid state before it becomes solid so the answer is false it does not directly turn into solid state without passing through liquid state
Particles of an object will vibrate faster when it absorbs energy.
Freezing does not occurs when matter absorbs energy.
So, all except 7 and 10 are true.
What is meant by energy ?Energy is defined as the ability to do work. Energy can be of various types such as kinetic energy, potential energy, electrical energy, thermal energy and various other types.
Here,
6. When matter solidifies, it turns directly to solid state without passing through the liquid state.
This is true because this transformation is done through the process called deposition in which the matter gets a phase change from gaseous state to solid state directly without passing through liquid state.
7. The particles of an object will not vibrate slower when it absorbs energy. This is because, the more amount of energy it absorbs will make them more faster that they vibrates with more speed.
So, the statement is false.
8. When the kinetic energy increases, the particles of matter vibrates faster. This is because, as the kinetic energy increases, it allows the molecules to move more freely and thus the rate of diffusion gets increased. This makes the particles to vibrate faster.
9. During evaporation, matter releases energy and loses kinetic energy. This is because, during evaporation, the molecules tend to escape from the liquid surface so that it moves faster and attains the threshold energy. As a result, the average kinetic energy decreases. So, the statement is true.
10. Freezing does not occurs when matter absorbs energy because, when matter absorbs energy, the intermolecular force of attraction between the molecules decreases and the matter starts diffusing which is the opposite mechanism of freezing. So, the statement is false.
11. Condensation is the process of conversion of vapour or gas into liquid state. So, the statement is true.
12. Sublimation is the process of conversion of solid matter into gaseous state directly without passing through liquid state. So, the statement is true.
13. During deposition and condensation, the gaseous matter releases energy and the random motion of the molecules decreases. So, the statement is true.
14. Melting is the process of conversion of solid matter into liquid state, which is the opposite mechanism of freezing. So, the statement is true.
15. During evaporation and melting, the kinetic energy of the particles increases and the molecules move more randomly and faster. So, the statement is true.
Hence,
Particles of an object will vibrate faster when it absorbs energy.
Freezing does not occurs when matter absorbs energy.
So, all except 7 and 10 are true.
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help people -_-!
thanks in advance
Answer: answer
Explanation:For equilibrium
Weight = Tension
mg=T
∴T=4×3.1π=12.4πN (as can be inferred from the question)
Y=
△l/l
T/A
=
1000
0.031
/20
12.4π/π(
1000
2
)
2
=
4×0.031
12.4×20×1000×(1000)
2
=2×10
12
N/m
2
How is the total kinetic energy of an object calculated?.
Answer:
ke = 0.5 x m x v^2
Explanation:
help m-e-e people -_-!
Answer:
the answer is
Explanation:For equilibrium
Weight = Tension
mg=T
∴T=4×3.1π=12.4πN (as can be inferred from the question)
Y=
△l/l
T/A
=
1000
0.031
/20
12.4π/π(
1000
2
)
2
=
4×0.031
12.4×20×1000×(1000)
2
=2×10
12
N/m
2
Help me please
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❝How did i go from growing up to breaking down❞-ts
Infinite
Lets see how
Elasticity is Young's modulusYoung's modulus is Stress/Strain.
For a rigid body strain is 0.
So Young's modulus is infinite
Use the linear equation, y = mx + b and solve for B (the y-intercept).
y = -9/-13x + ____
Slope = -9/-13
Endpoint = 7,-6
Answer:
[tex]b=-\frac{141}{13}[/tex]
Explanation:
Given the following question:
[tex]y=mx+b[/tex]
In order to find the answer, we substitute the given information into the slope intercept then solve for b.
[tex]y=mx+b[/tex]
[tex]m=\frac{-9}{-13}[/tex]
[tex]y=-6[/tex]
[tex]x=7[/tex]
[tex](7,6)=(x1,y1)[/tex]
Substitute:
[tex]-6=\frac{-9}{-13} (7)+b[/tex]
[tex]\frac{-9}{-13} \times\frac{7}{1} =\frac{63}{13}[/tex]
[tex]\frac{63}{13}+b=6[/tex]
[tex]\frac{63}{13} -\frac{63}{13} =0[/tex]
[tex]6-\frac{63}{13} =-\frac{141}{13}[/tex]
[tex]b=-\frac{141}{13}[/tex]
Hope this helps.
differentiate between conductivity of electric current through Mercury and glycerine
Answer:
When conducting electricity, the electrons inside the material move from a higher potential to a lower potential. The conductance of a component can also be defined as the current generated per unit voltage difference. The conductance is a property of the object whereas electrical conductivity is a property of the material.
Explanation:
Why is copper NOT used as a filament?
Answer:
Short answer, because copper wire does not have high resistance.
Explanation:
What cause sound? And how do it work
Answer:
Simple yet quick mechanical vibrations of various elastic substances produce sound. When they are moved or struck to vibrate, the auditory nerve of the ear receives the same sort of vibrations, which are subsequently perceived by the mind.
All of the inner planets
a. have one or more moons.
b. Iare made of igneous rock.
c. have been geologically active.
d: two of the above
Answer:
The answer to this is D two of the above
Which statement best describes the acceleration of the box? A) The box accelerates at 1. 0 m/s squared to the right because the net force is 17N to the right B) The box accelerates at 1. 9 m/s squared to the right because the greater force is to the right C) The box accelerates at 3. 0 m/s squared because the combined forces cause the box to accelerate D) The box does not accelerate, because neither force is large enough to move the box.
The box accelerates at 1. 0 m/s² to the right because the net force is 17N to the right . This statement clearly depicts the relation between force and acceleration. Hence option A is correct.
What is acceleration?
Acceleration is defined as the rate of change of the velocity of the body. Its unit is m/sec².It is a vector quantity. It requires both magnitudes as well as direction to define.
According to Newton's second law of motion, the net force acting on the body is equal to the product of mass and acceleration of the body.
The direction of acceleration is in the direction of net force acted.
Hence option A is correct.
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Characteristics of convection
Answer:
the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in the transfer of heat.
Explanation:
How does the speed of light traveling through a medium (such as air or glass) compare to the speed of light in a vacuum
Answer:
Nothing can travel faster than the speed of light in a vacuum. "Light in a vacuum always travels at the same speed"
True or False. Alfred Wegener contributed greatly to the theory of plate tectonics by collecting and analyzing fossil, glacial and geologic evidence.
Answer:
The Answer would be True
Explanation:
Answer:
The answer is true
Explanation:
It is true
Where is the light energy converted into an electron flow.
During photosynthesis, light energy is converted into an electron flow in the reaction center chlorophyll.
What is photosynthesis?Photosynthesis can be defined as a biological and chemical process through which green plants (autotrophs) convert light energy (sunlight) into chemical energy.
The chemical reaction for photosynthesis.In Science, photosynthesis is represented by the following chemical reaction:
[tex]Carbon \;dioxide + water + light energy \rightarrow sugar + oxygen[/tex]
In conclusion, the electrons found within the pigment molecules are excited by visible light, which is then converted into an electron flow in the reaction center chlorophyll.
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How is a sound wave made by plucking a guitar string?.
Answer:
i have no clue
Explanation:
The two loops in (Figure 1) have equal currents in opposite directions. What current will create a magnetic field strength of 850 μT at the center?
The current that will produce the given magnetic field strength is 4,250r ( r is the distance from the wire).
Magnetic field strengthThe magnetic field strength at the center of the loop is calculated as follows;
B = (μ₀I)/(2πr)
where;
B is magnetic field strengthμ₀ is permeability of free spaceI is the currentr is the distance from the wireSolving for the current;
I = (2πrB)/(μ₀)
[tex]I = \frac{2\pi \times r \times 850 \times 10^{-6}}{4\pi \times 10^{-7}} \\\\I = 4,250 r[/tex]
Thus, the current that will produce the given magnetic field strength is 4,250r ( r is the distance from the wire).
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A car travels 460km in 7 hours. How would you calculate the speed?
Answer:
speed = 65.7 km/h
Explanation:
speed = distance over time, so you'd do 460 km/7 hrs to get your speed in km/h
According to our theory of solar system formation, which law best explains why the central regions of the solar nebula got hotter as the nebula shrank in size?.
Answer:
According to our theory of solar system formation, which law best explains why the central regions of the solar nebula got hotter as the nebula shrank in size? As it shrank in size, gas particles lost gravitational potential energy. Since energy must be conserved, this energy became thermal energy.
Explanation:
(a) A person moves a distance of 3 km towards east, then 2 km towards north and then 3.5 km towards east.
Find :
(i) the distance covered by the person,
(ii) the displacement of this motion.
(b) Name the type of motion in which a body has uniform speed but not uniform velocity ?
Answer:
(a)A person moves a distance of 3 km towards east, then 2 km towards north and then 3.5 km towards east.
Find :
(i) the distance covered by the person
Solution:3 km+2km+3.5km
And at least total distance 8.5 km
___________________________
(ii) the displacement of this motion.
Solution:Displacement is the length of the shortest path between the initial and the final position. It is a vector quantity (Vector quantities are the ones which have both magnitude,called speed and direction)
Here displacement can be found out using Pythagorean theorem
Displacement 2=2²+6.5²
Displacement=√4+42.25
Displacement=√46.25-6.8(approx)
___________________________
(b) Name the type of motion in which a body has uniform speed but not uniform velocity ?
Solution:In circulation motion body has constant speed but do not have constant velocity.
HOPE IT HELPSMARK ME AS BRAINLIEST
1 * Choose the correct item.
1 The festival is held/is being held/was being held every year in July.
2 The play is/was/has written by Shakespeare in the 16th century.
3 The outdoor performance will cancel/ cancelled/be cancelled if the weather is bad, but the actors usually don't stop for a bit of rain!
4 The panel with the actors from The Defenders was being moved/has been moved/is moved to 7 o'clock.
5 An episode of the TV show was filmed/had been filmed/is being filmed in my village right now!
Answer:
1. is held
2. was
3. be cancelled
4. has been moved
5. is being filmed
Explanation:
If you read them out, you can find out which ones flow the best! Hope this helps!
only people who are better than me can answer this ( ◜‿◝ )♡
energy is evolved ....ig
Answer:
Solution: If two liquid drops coalesce then there will be a decrease in surface area, simultaneously there will be a decrease in surface energy hence energy is liberated.
Explanation:
What i mean is basically 2
What is the speed of the beta particles???
no links
The speed of the beta particles is about 90% of the speed of the light that is 2.7 x 10^8 m/s.
Explanation:
Hope it helps you!!Explanation:
The speed of β particles is of the order of 2.7 × 10⁸m/s in vacuum
How much time is required for an elevator to lift a 2000 kg load up 28 m from the ground level, if the motor can produce 13 kW of power?
Answer:
W = P * t work = work/time * time
t = W / P time required
t = 2000 kg * 9.8 m/s2 * 28 m / P = 549,000 J / 13000 J/s
t = 42.2 sec
Note: 1 kW = 1000 J/sec
Time required for an elevator to lift a 2000 kg load up 28 m from the ground level, if the motor can produce 13 kW of electric power will be 42.22 seconds .
What is Electric Power ?The time rate of doing work or delivering energy is called Electric Power
electric Power can be calculates by
electric Power = Work done / time
Given :
mass (m) = 2000 kg
height (h) = 28m
electric power (P) = 13 kW = 13 * 10^3
acceleration due to gravity (g) = 9.8 m/s^2
Since , the load has been taken to a certain height , hence work must be done and that work done is stored in the form of Potential Energy
Work done = m* g * h
= 2000 * 9.8 * 28
13000 = 2000 * 9.8 * 28 / time
Time = 2000 * 9.8 * 28 / 13000
Time = 42.22 seconds
Time required for an elevator to lift a 2000 kg load up 28 m from the ground level, if the motor can produce 13 kW of electric power will be 42.22 seconds .
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A positive charge of 6. 0 × 10-4 C is in an electric field that exerts a force of 4. 5 × 10-4 N on it. What is the strength of the electric field?.
The strength of the electric field will be 0.75 NC⁻¹ . Electric force F acted per unit positive electric charge q is known as the strength of the electric field.
What is the strength of the electric field?The electric, or Coulomb, force F exerted per unit positive electric charge q at any place, can be used to calculate the strength of an electric field E at any position.
It is given by;
E = F/q
The given data in the problem is;
q is the value of charge=6. 0 × 10⁻⁴C
F is the electric force = 4. 5 × 10⁻⁴ N
E is the strength of electric field=?
The electric field strength is found by the formula;
[tex]\rm E=\frac{F}{q} \\\\ \rm E=\frac{4.5 \times 10^{-4}}{6 \times 10^-4} \\\\ \rm E= 0.75\ N/C[/tex]
Hence the strength of the electric field will be 0.75 NC⁻¹ .
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Which best compares radiation and conduction?
O Both transfer thermal energy from warm objects to cooler objects,
O Both can transfer energy through empty space.
O Both transfer thermal energy by electromagnetic waves.
O Both involve the transfer of energy through direct contact,
Please help me
Answer:
Both transfers thermal energy from warm objects to cooler objects
Explanation:
Both transfer thermal energy from warm objects to cooler objects
