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:
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.
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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Help me please
[tex] \\ [/tex]
❝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
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
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:
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"
A race boat, starting from rest, uniformly accelerates for 4 seconds. If the boat moves
70 meters during the acceleration period, what is its rate of acceleration?
Answer:
uui 2+6=8m calculator hunny work's
A farmer pulls the cord on the bell on his barn to signal everyone that it is time to eat. Which of the following factors would most impact the speed of the sound waves coming from the ringing bell?
(A) The type of metal that the bell is made of
(B) The force that the bell was struck with to start the vibrations
(C) The direction of the wave as the sound vibrates away from the bell
(D) The temperature and medium through which the sound is traveling
(D) The temperature and medium through which the sound is traveling would most impact the speed of the sound waves coming from the ringing bell ?
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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POTENTIAL I KINETIC ENERGY
7. Where is kinetic energy decreasing A B C D
8. Where is kinetic energy increasing A B C D
9. Which location has more potential energy then B? A B C D
10. Which location has more kinetic energy then B? A B C D
ANSWER THESE 10 FOR ME
7kinetic energy is decreasing in B
A particular light source gives off light waves with a measured wavelength of
2. 0 X 10-7 m. What is the frequency of the light source?
a. ) 6. 67 X 10-15 Hz
b. ) 6. 0 X 1011 Hz
c. ) 1. 5 X 1015 Hz
d. ) Not enough information
The frequency of the light source is 1.5 x 10¹⁵ Hz.
Frequency of the light sourceThe frequency of the light source is determined using the following equations;
c = fλ
where;
c is speed of light
f is the frequency
λ is the wavelength
f = (3 x 10⁸) / (2 x 10⁻⁷)
f = 1.5 x 10¹⁵ Hz
Thus, the frequency of the light source is 1.5 x 10¹⁵ Hz.
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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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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 boy holds a heavy package for one hour. He is very tired but has not done any work. Explain why he did not do any work.
Answer:he's not applying force or motion
Explanation:
p=f & m
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
9. Your friend claims that you can prove that two parallelograms are congruent
by proving that they have two pairs of congruent opposite angles. Is your
friend correct? Explain your reasoning.
Yes , the two parallelograms are considered congruent if they have two pairs of congruent opposite angles.
How two parallelograms are equal?The opposite angles of the parallelogram are congruent which shows equality of two parallelograms so we can conclude that the two parallelograms are considered congruent if they have two pairs of congruent opposite angles.
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When there is a break in an electric tools insulation.
Answer:
A break in an electric tool's or machine's insulation can cause its metal parts to become “hot” or energized, meaning that they conduct electricity. Touching these energized parts can result in an electric shock, burn or electrocution.
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
Please help I’ll make u brainliest please and thank you
What is the difference between heat and temperature?
A. Heat is the transfer or thermal energy; temperature is a measurment of thermal energy
B. Heat is a measurement of thermal energy; temperature is a transfer of thermal energy
Answer: A.
Explanation: I’m pretty sure that’s it, but I’m not 100% sure. But that’s the best option.
Based on what you know about the interactions between stars and other interstellar media, select all of the correct statements from the following list. Molecular clouds are of very low density; ultraviolet photons permeate the cloud to break up all molecules. Much interstellar dust comes from stellar atmospheres. Clouds of neutral hydrogen have masses of hundreds of solar masses. Molecular clouds are where stars are born. The intercloud medium is cool. Coronal gas is ejected from supernova explosions.
The statements 'much interstellar dust comes from stellar atmospheres', 'molecular clouds are where stars are born' and 'coronal gas is ejected from supernova explosions' are TRUE. Molecular clouds are stars in formation.
What are molecular clouds?Molecular clouds are regions into the space where celestial bodies (stars) are born in a galaxy.
The formation of stars always occurs within these molecular clouds, especially in the disk-shaped area of spiral galaxies.
Molecular clouds can be considered areas into space that are formed by very cold and dark matter.
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list 2 examples of objects demonstrating mechanical energy.
How to Estimate your age in seconds ?
No Spamming ~
Answer:
Explanation:
First, remember your age.
Then, multiply it times 365 x 24 x 60 x 60.
Or basically, multiply it times 315.36 x 10⁵
How is the total kinetic energy of an object calculated?.
Answer:
ke = 0.5 x m x v^2
Explanation:
The mass of the earth is 5.98 × 10^24 kg and the mass of the moon is 7.35 × 10^22 kg. If the gravitational force is 1.98 x 10^20 N, what is the
distance to the moon?
r² = G.m₁m₂/F
r² = 6.67 x 10⁻¹¹ x 5.98 x 10²⁴ x 7.35 x 10²² / 1.98 x 10²⁰
r = 3.85 x 10⁸ m
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
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
How is a sound wave made by plucking a guitar string?.
Answer:
i have no clue
Explanation:
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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Discuss the relationship between mental and physical health
Answer:
Mental and physical health is fundamentally linked. There are multiple associations between mental health and chronic physical conditions that significantly impact people’s quality of life, demands on health care and other publicly funded services, and generate consequences to society. The World Health Organization (WHO) defines: health as a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity. The WHO states that “there is no health without mental health.”
Nowhere is the relationship between mental and physical health more evident than in the area of chronic conditions. The associations between mental and physical health are:
1. Poor mental health is a risk factor for chronic physical conditions.
2. People with serious mental health conditions are at high risk of experiencing chronic physical conditions.
3. People with chronic physical conditions are at risk of developing poor mental health.
The social determinants of health impact both chronic physical conditions and mental health. Key aspects of prevention include increasing physical activity, access to nutritious foods, ensuring adequate income and fostering social inclusion and social support. This creates opportunities to enhance protective factors and reduce risk factors related to aspects of mental and physical health.
Understanding the links between mind and body is the first step in developing strategies to reduce the incidence of co-existing conditions and support those already living with mental illnesses and chronic physical conditions.
Explanation:
Hope this helps
Brainliness please and thank you
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.
