Answer:
110.23113077052545
Explanation:
anomalous expansion of water
Answer:
Su Donarken Neden Genleşir?
Çevremizdeki maddelerin neredeyse tamamı sıcaklıkları arttığı zaman genleşir ve hacimleri artar. Bu durumu maddelerin sıcaklıklarıyla birlikte enerjilerinin de artmasıyla açıklayabiliriz.
Katı ya da sıvı haldeki bir maddenin taneciklerini bir arada tutan ana kuvvet elektromanyetik etkileşimdir. Maddelerin yoğun fazlar (katı, sıvı) oluşturmalarından da anlaşılabileceği gibi, tanecikler arasındaki çekme kuvvetleri itme kuvvetlerine baskın gelir. Isıtma sırasında maddeye verilen enerji, taneciklerin maddeyi bir arada tutan kuvvetleri kısmen de olsa yenmesini ve taneciklerin birbirinden uzaklaşmasını sağlar. Bu nedenle, genel olarak sıcaklığı artan maddelerin hacimleri de artar.
Su ise yukarıda anlatılan duruma bir istisna oluşturur. Soğutulan sıvı suyun hacmi 4ºC’ye kadar beklendiği gibi azalırken, 4ºC’den sonra artmaya başar. Hacimde soğumayla beraber yaşanan bu artış donma sırasında da devam eder. Bu olguyu açıklayabilmek için su moleküllerinin katı haldeki kristal yapısına bakmak gerekir. Sudaki hidrojen ve oksijen atomları arasında oluşan hidrojen bağları, su katı haldeyken hidrojen atomlarının farklı iki su molekülünün oksijen atomlarını birleştiren doğrusal çizgiye yakın bir nokta etrafında konumlanmasını sağlar. Oluşan bu hidrojen bağları katı halde hayli boşluklu bir yapı oluşmasına neden olur. Sıcaklık artışıyla moleküllerin enerjisi arttığı zaman ise, hidrojen bağları sebebiyle oluşan boşluklu yapı bozulur ve hacim azalır.
Electromagnetic waves are made by vibrating electric charges and can travel through what
Answer:
vibrates, and they carry energy from one place to another. Look at the sound wave and the water wave. vibrating electric charges and can travel through space where matter is not present. to particle, electromagnetic waves travel by transferring energy between vibrating electric and magnetic fields.
2. A volleyball player strikes a 3 kg volleyball with a velocity of 14 m/s. What is the kinetic energy of the volleyball?
3. A cat jumps off a table with 750 J of kinetic energy at 10 m/s. Find the cat's mass.
Answer:
2. 294 j
3. 37500 J
Explanation:
Answer:
2)294 3)15
Explanation:
2)E=mv^2/2
E=3×14^2/2
E=3×196/2
E=3×98
E=294 J
3)E=mv^2/2
m=2E/v^2
m=2×750/10^2
m=2×750/100
m=750/50
m=15
(b) With a current of 0.38 A, the average velocity of an electron in the wire is 5.5 10-6 m s-1 and the average magnetic force on one electron is 1.4 10-25 N. Calculate the flux density B of the magnetic field.
Answer:
B = 0.159 T
Explanation:
Given that,
Current, I = 0.38 A
The average velocity of the electron, [tex]v=5.5\times 10^{-6}\ m/s[/tex]
The average magnetic force on the electron, [tex]F=1.4\times 10^{-25}\ N[/tex]
We need to find the flux density B of the magnetic field. We know that the magnetic force is given by :
[tex]F=qvB\\\\B=\dfrac{F}{qv}[/tex]
Put all the values,
[tex]B=\dfrac{1.4\times 10^{-25}}{1.6\times 10^{-19}\times 5.5\times 10^{-6}}\\\\B=0.159\ T[/tex]
So, the required flux density of the magnetic field is 0.159 T.
What does it mean when a wave is reflected?
Answer:
light can bounce off the material, which is called reflection. The reflection of a wave is simply a process by which a wave, whether light, sound, infrared, or radio waves, hits an object and bounces off it.
Explanation:
Answer:
It is reflection because the light will instead of passing through will bounce off a material and be reflected to another surface or material
Please help! I will mark you as brainliest!
Research revealed that patients who received chemotherapy in a hospital setting subsequently experienced
a(n) immune response when they again visited the hospital. In this example, the would be
classified as the US.
O enhanced; hospital
O suppressed; hospital
о
enhanced; chemotherapy
O suppressed; chemotherapy
Answer: suppressed; chemotherapy
Explanation:
Chemotherapy is typically a drug treatment whereby powerful chemicals are used to kill the fast growing cells in ones body. Chemotherapy is usually used in the treatments of cancer.
Research revealed that patients who received chemotherapy in a hospital setting subsequently experienced
a (suppressed) immune response when they again visited the hospital. In this example, the (chemotherapy) would be classified as the US.
All of the following are bases except
answers:
A. NaOH
B. Al(OH)3
C. HBr
D. Ca(OH)2
Answer:
(C) HBr is an acid .......
As the amount of charge on two objects increases, the strength of the electrical force between the objects increases. decreases. varies. remains the same.For which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force? two positively charged objects two negatively charged objects two objects that have no charge two objects that have opposite charges
Answer:
a. Increases
b. Two objects that have opposite charges
Explanation:
a. As the amount of charge on two objects increases, the strength of the electrical force between the objects increases. decreases. varies. remains the same.
According to Coulomb's law, the electrical force, F between two charges q and Q is directly proportional to the product of the charges.
So, F ∝ qQ
So, if q and Q increase, their product increases and thus, the strength of the electrical force between them increases.
So, if the amount of charge of two objects increases, the strength of the electrical force between the objects increases.
b. For which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force? two positively charged objects two negatively charged objects two objects that have no charge two objects that have opposite charges
Since according to Coulomb's law, the electrical force, F between two charges q and Q is directly proportional to the product of the charges.
So, F ∝ qQ
If the same amount of electrons are added to both charges and the charges are opposite in sign, the magnitude of one charge increases while that of the other charge decreases. so the product qQ decreases and thus F decreases.
So, the electric force decreases when the same amount of electrons is added to two objects that have opposite charges.
Answer:
A increases
Explanation:
A) Calculate the torque required to accelerate the Earth in 7 days from rest to its present angular speed about its axis. (b) Calculate the energy required. (c) Calculate the average power required.
Answer:
A) 1.3013476 × 10²⁸ N·m
b) 2.8618128 × 10²⁹ J
c) 4.73183333 × 10²³ W
Explanation:
The mass of the Earth, M = 5.972 × 10²⁴ kg
The radius of the Earth, R = 6,371 km
The angular speed of the Earth, ω = 2·π/(24 hr) = 7.27220522 × 10⁻⁵ rad/s
The shape of the Earth ≈ Spherical
The moment of inertia of a sphere, I = (2/5)·M·R²
The angular acceleration of the Earth in 7 days from rest its present angular speed, ω, is given as follows;
α = 7.27220522 × 10⁻⁵ rad/s/((7 × 24 × 60 × 60) s) = 1.2024149 × 10⁻¹⁰ rad/s²
Torque, τ = I × α
∴ τ = (2/5) × 5.972 × 10²⁴ × 6,731,000² × 1.2024149 × 10⁻¹⁰ = 1.3013476 × 10²⁸
The torque required, τ = 1.3013476 × 10²⁸ N·m
b) The energy required, [tex]K.E. _{(Rotational)}[/tex] = 1/2 × I × ω²
∴ [tex]K.E. _{(Rotational)}[/tex] = (1/2) × (2/5) × 5.972 × 10²⁴ × 6,731,000² × (7.27220522 × 10⁻⁵ rad/s)²
The energy required, [tex]K.E. _{(Rotational)}[/tex] = 2.8618128 × 10²⁹ J
c) Power = Energy/Time
Therefore, the average power required, P = [tex]K.E. _{(Rotational)}[/tex]/Time
∴ P = 2.8618128 × 10²⁹ J/(7 × 24 × 60 × 60) s) = 4.73183333 × 10²³ Watts
The average power required, P = 4.73183333 × 10²³ Watts.
5. If a roller-coaster car has 40,000 J of gravitational potential energy when at rest on the top of a hill, how much kinetic energy does it have when it is ½ of the way down the hill?
Quentin is playing baseball and is batting. He swings and hits the ball sending it flying to the outfield. Which is greater- the force of the ball on the bat or the force of the bat on the ball ?
Answer:
The force of the ball on the bat is same as the force of the bat on the ball.
Explanation:
A bat hits the ball and the ball moves to the out filed.
According to the Newton's third law, for every action there is an equal and opposite reaction.
The action and the reaction forces acts on the two different bodies but the magnitude of the force is same.
As the ball is hitted by the bat, the bat exerts the force on the ball and the same force is exerted on the bat by the ball according to the Newton's third law.
So, the force of the ball on the bat is same as the force of the bat on the ball but the direction of force is opposite.
What formula oan be used to determine the velocity of an object in free fall?
Answer:
A
Explanation:
Briefly describe how polygraph tests work. According to the American Psychological Association, these tests are not accurate at all, and they compare them to the flip of a coin. After describing how polygraph test works (in two to three sentences), discuss your thoughts on the accuracy of polygraph tests. Do you agree with the American Psychological Association? Do you think the tests have any benefit, or do you think they should be completely discontinued?
Answer:
no such thing i dont think
Explanation:
Answer:
Polygraph tests are used to determine whether someone is lying or not, and display the physical signs someone is showing when they speak to be interpreted. Polygraphs measure things like heartbeat, breathing rate, and electrical conductivity of the skin, which are signs that get more and more severe when someone tells major lies or lies a lot. Polygraph tests are pretty unreliable because everyone shows different reactions to speaking depending on how anxious they are or any other medical condition, which could falsely incriminate them, but I think it is still important to determine the signs someone displays to use as a datapoint later on in the trial. For those reasons, they should still be used but shouldn't be relied on as heavily.
Explanation:
Se aplica una fuerza de 8N a un cochecito de 650 gramos. Calcula: a) aceleración, b)espacio recorrido en 5 segundos y c) velocidad a los 3 segundos si parte del reposo
Respuesta:
a) 12.3 m/s²
b) 153.75 m
c) 36.9 m/s
Explicación:
Paso 1: Información provista
Fuerza aplicada (F): 8 NMasa del cochecito (m): 650 gPaso 2: Calcular la aceleración (a) del cochecito
Usaremos la segunda ley del movimiento de Newton.
F = m × a
a = F/m = 8 N / 0.650 kg = 12.3 m/s²
Paso 3: Calcular el espacio recorrido (x) en 5 segundos (t).
Usaremos la siguiente fórmula cinemática para un movimiento rectilineo uniformemente acelerado.
x = 1/2 × a × t²
x = 1/2 × 12.3 m/s² × (5s)² = 153.75 m
Paso 4: Calcular la velocidad (v) a los 3 segundos si parte del reposo
Usaremos la siguiente fórmula cinemática para un movimiento rectilineo uniformemente acelerado.
v = a × t
v = 12.3 m/s² × 3 s = 36.9 m/s
Los cálculos dados serían los siguientes:
a). Aceleración = 12,3 m / s ^ 2
B). Distancia recorrida en 5 segundos = 153,75 m
C). Velocidad en 3 segundos = 36,9 m / s
Dado que,
Fuerza aplicada = 8N
Peso de la silla de paseo en gramos = 650g
a). To find the aceleración,
[tex]F = m[/tex] × [tex]a[/tex]
[tex]a = F/m[/tex]
[tex]= 8 N/0.650 kg[/tex]
[tex]= 12.3 m/s^2[/tex]
Now,
b). :-espacio recorrido en 5 segundos y
Using the Kinematic formula:
[tex]x = 1/2[/tex] × [tex]a[/tex] × [tex]t^2[/tex]
[tex]x = 1/2[/tex] × [tex]12.3 m/s^2[/tex] × [tex](5s)^2[/tex]
= 153.75 m
c). Using the same formula,
velocidad a los 3 segundos si parte
[tex]v = a[/tex] × [tex]t[/tex]
[tex]v = 12.3 m/s^2[/tex] × [tex]3 s[/tex]
= 36.9 m/s
Learn more about "Acceleration" here:
brainly.com/question/3046924
is rainwater hardwater?
Answer:
As rainwater falls, it is naturally soft. However, as water makes its way through the ground and into our waterways, it picks up minerals like chalk, lime and mostly calcium and magnesium and becomes hard water. ... Even hair washed in hard water may feel sticky and look dull.
Explanation:
Calculate the mass of a truck traveling at 30.56 m/s that has a starting momentum of 77,000 kg*m/s
Answer:
2519.63 kg
Explanation:
mass(m)=momentum (p)/velocity
=77000/30.56
=2519.63kg
A large bar magnet (mass of 0.4 kg) exerts a 5 N force on a small bar magnet (mass of 0.1 kg) located 20 cm away. Calculate the force exerted by the small bar magnet on the large one *
Answer:
5 N
Explanation:
Given that,
A large bar magnet of mass 0.4 kg exerts a 5 N force on a small bar magnet (mass of 0.1 kg) located 20 cm away.
We need to find the force exerted by the small bar magnet on the large one.
We know that, every action has an equal and opposite reaction. Both action and reaction occur in pairs. The force acting on one object to another is same and in opposite direction on the other object.
Hence, the force exerted by the small bar magnet on the large one is also 5 N.
The brakes applied to a car
produce an acceleration of 6 m s-²
the opposite direction to the motion. If
the car takes 2 seconds to stop after the
application of brakes, calculate the
distance it travels during this time.
Explanation:
[tex]from \: newton \: first \: equation \\ V = U + at \\ 0 = U + ( - 6 \times 2) \\ U = 12 \: m {s}^{ - 1} \\ from \: newtons \: third \: equation \\ {V}^{2} = {U}^{2} + 2aS \\ 0 = {12}^{2} + (2 \times - 12 \times \: S ) \\ 144 = 24S \\S = 6 \: m [/tex]
What is a Weather Front. in your own words but be more detailed about what you say.
Explanation:
A weather front is a boundary separating air masses of several characteristics eg. Air density, wind and humidity. Disturbed weather often arises from these differences
Which of the following statements best describes the method of energy conservation known as cogeneration?
Answer:
heat and power
Explanation:
is the simultaneous production of electricity and heat both of which are used
shoppers often take clothes outside to look at them in daylight before deciding whether to buy why do they do this pls answer
Answer:
Colors appear differently. Different light sources give off different rays that affect the color
The shoppers often take clothes outside to look at them in daylight before deciding whether to buy them because they can see the true color of the clothes only in sunlight where no bulb light is reflecting on the clothes.
What is reflection?A wave will rapidly reverse course and reflect when it hits a barrier between two media. At least a portion of the oncoming wave disturbance remains in the same medium. Regular reflection occurs at plane boundaries in accordance with a simple law.
The angle of incidence, or the angle between the motion of an approaching wave and a perpendicular to the reflecting surface, is equal to the angle between the motion of a reflected wave and a perpendicular (angle of reflection).
The shoppers often take clothes outside to look at them in daylight before deciding whether to buy because the color is true in pure sunlight, the room light, or bulb light the color will appear true.
To know more about reflection:
https://brainly.com/question/15839646
#SPJ2
describe how you can see and feel sound waves
Answer:
Sound is a vibration, or wave, that travels through the air. Sound waves are invisible to our eyes; unless we find a way to make the sound waves move something that we can see. In this activity, your child will use different noise-making objects to cause sound waves and make sand visibly move.
Sound wave can be described by five characteristics: Wavelength, Amplitude, Time-Period, Frequency and Velocity or Speed. The minimum distance in which a sound wave repeats itself is called its wavelength.
Explanation:
When the vibrating air hits your eardrum, it causes your eardrum to vibrate, just as the balloon did. These vibrations are transferred through the tiny bones in your ear to the inner ear. These vibrations are detected by nerves, which send impulses that your brain "hears" as sound.
A laboratory burner transfers 309 J of thermal energy into a 100. g borosilicate glass beaker, causing its temperature to rise by 3.69 °C. What is the specific heat of borosilicate glass?
When borosilicate glass is undergoing change in temperature, heat is transferred. The specific heat of borosilicate glass is 837.4 J/kg. °C
What is specific heat?The specific heat is the amount of heat stored per kilogram of substance by 1 degree rise in temperature.
Given is the mass of borosilicate glass m =100 g =0.1 kg, heat transferred Q = 309J, temperature change ΔT = 3.69°C
Q = m x Cp x ΔT
309 = 0.1 x Cp x 3.69
Cp = 837.4 J/kg. °C
Thus, the specific heat of borosilicate glass is 837.4 J/kg. °C
Learn more about specific heat.
https://brainly.com/question/11297584
#SPJ1
a spherical mirror produces a magnification of -1 on a screen placed at a distance of 40cm from the mirror i) write the type of mirror ii) What is the focal length of the mirror
Answer:
f =-20 cm
Explanation:
Given that,
The magnification of a spherical mirror, m = -1
The image distance, v = 40 cm (for negative magnification)
The magnification of a concave mirror is negative. The mirror showing -1 magnification is a concave mirror.
Let f be the focal length of the mirror. We know that,
[tex]m=\dfrac{-v}{u}\\\\-1=\dfrac{-v}{u}\\\\v=u[/tex]
Object distance, u = -40 cm
Using mirror's formula i.e.
[tex]\dfrac{1}{f}=\dfrac{1}{u}+\dfrac{1}{v}\\\\f=\dfrac{1}{\dfrac{1}{-40}+\dfrac{1}{-40}}\\\\f=-20\ cm[/tex]
So, the focal length of the mirror is 20 cm.
please answer this dear friends please
Answer:
7. 5 pa
8. 5 pa
9. 5 pa
10. 75 pa
11. 25 N
Explanation:
7.
P = F/ A
= 15 / 3
= 5 pa
8.
P = F/ A
= 35 / 7
= 5 pa
9.
area of floor = l × b
= 1 × 4
= 4m^ 2
P = F / A
= 20 / 4
=5 pa
10.
area in m^2 = 400/100 = 4m^2
P = F/A
= 300 / 4
= 75 pa
11.
F = P×A
= 25×1
= 25 N
What is the best description of the destructive interference of light?
The crest of one wave overlaps with the trough of another.
A mechanical wave meets an electromagnetic wave.
A longitudinal wave meets a transverse light wave.
The crests of two waves intersect.
Destructive interference occurs when the maxima of two waves are 180 degrees out of phase: a positive displacement of one wave is cancelled exactly by a negative displacement of the other wave.
Answer:
The crest of one wave overlaps the trough of another.
Answer:
The crest of one wave overlaps with the trough of another.
The loudness of a sound depends on the sound wave's ________. A. frequency B. pitch C. amplitude D. density
Answer:
Frequency or amplitude
Explanation:
nun
At what angle does the beam of light fall into the mirror if the beam is reflected
makes an angle of 40 ° with that mirror
Answer:
The angle of incidence is the angle formed by the incident ray and the perpendicular to the surface. Together, the angle of incidence and the angle the incident ray makes with the surface form a right angle (90 degrees). The angle of incidence is therefore given by the following expression:
Angle of incidence = 90 degrees - angle ray makes with the surface
In your example
Angle of incidence = 90 degrees - 40 degrees = 50 degrees
The law of reflection states that the angle of incidence equals the angle of reflection, which is also measured with respect to the perpendicular to the surface, so
Angle of reflection = Angle of incidence = 50 degrees.
What is true about the elements that make up a mineral?
Answer:
All minerals have a definite chemical makeup. ... For example, the mineral hematite has two iron atoms for every three oxygen atoms. The mineral magnetite has three iron atoms for every four oxygen atoms. Many minerals have very complex chemical formulas that include several elements.
Explanation:
Two identical sounds are played from two laptops sitting
next to each other on a table. Both sounds have the same
pitch but one is quiet than the other. Which of the
following is most likely the difference between the two
sound waves produced by the laptops?
Amplitude
O Wavelength
O Frequency
Wave Speed
Ouestion 9
1te
Answer:
Amplitude
Explanation:
The lower the amplitude, the lower the frequency.