Answer:
When vectors are added or subtracted, the net force is called the resultant force.
Explanation:
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After a nucleus with 85 protons undergoes alpha decay, it has
? protons.
Answer:
After a nucleus with 85 protons undergoes alpha decay, it has 83 protons.
Explanation:
In an alpha particle there are two protons
In the given substance's nucleus, there are total of 85 protons
After the decay, the proton number reduce
The current proton number after decay is
85 -2 = 83
After a nucleus with 85 protons undergoes alpha decay, it has 83 protons.
The number of protons in this nucleus after it undergoes an alpha decay is 83 protons.
Given the following data:
Number of protons in nucleus = 85 protonsTo determine the number of protons in this nucleus after it undergoes an alpha decay:
The chemical symbol for an alpha particle is:
[tex]^{4}_{2} \alpha[/tex]
Therefore, we can deduce the following points about an alpha particle:
Mass number = 4Number of protons = 2After an alpha decay:
Protons = [tex]85-2[/tex]
Protons = 83
Therefore, the number of protons in this nucleus after it undergoes an alpha decay is 83 protons.
Read more: https://brainly.com/question/17438493
What formula oan be used to determine the velocity of an object in free fall?
Answer:
A
Explanation:
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.
(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.
La onda que se muestra en la figura recorre la distancia AB= d =75m en t = 0.15s. Determine: A. La rapidez de propagación B. La longitud de onda C. La frecuencia
ah=d=75m= 0.15s A B C Hola cómo estás das que ases de bueno amiga
Which diagram represent light with the longest wavelength ?
Answer:
the answer is the diagram B
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.
The Kentucky Derby is a 1¼ mile race. Mandaloun ran it in 1.52 minutes. Hot Rod Charlie ran at a speed of .79 miles per minute. Who won the race?
Answer:
Mandaloun won the race.
Explanation:
First, we will calculate the time taken by the Hot Rod Charlie:
[tex]s = vt\\t = \frac{s}{v}[/tex]
where,
t = time taken by Hot Rod Charlie = ?
s = distance covered = 1.25 miles
v = speed of Hot Rod Charlie = 0.79 miles/min
Therefore,
[tex]t = \frac{1.25\ miles}{0.79\ miles/min} \\t = 1.58 min[/tex]
Since Hot Rod Charlie took more time (1.58 min) than the Mandaloun (1.52 min).
Therefore Mandaloun won the race.
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
How much work is done by 0.070 m3 of gas, when the volume remains constant with pressure of 63 x 105 Pa?
Answer:
W = 0 J
Explanation:
The amount of work done by gas at constant pressure is given by the following formula:
[tex]W = P\Delta V[/tex]
where,
W = Work done by the gas
P = Pressure of the gas
ΔV = Change in the volume of the gas
Since the volume of the gas is constant. Therefore, there is no change in the volume of the gas:
[tex]W = P(0\ m^3)\\[/tex]
W = 0 J
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
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
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:
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.
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
which kind of energy is the most common by-product of the energy transformation?
Answer:
kinetic energy
Explanation:
it is most common
The ship was travelling 77 meters per second, 35 degrees above the x-axis Northeast. Determine the magnitude and direction of the horizontal vector component, Vx
Answer:
vₓ = 63.07 m/s
Explanation:
The horizontal vector component of the velocity can be found by the following formula:
[tex]v_x = vCos\theta[/tex]
where,
vₓ = horizontal vector component of velocity = ?
v = magnitude of velocity = 77 m/s
θ = angle with x-axis = 35°
Therefore,
[tex]v_x = (77\ m/s)Cos\ 35^o[/tex]
vₓ = 63.07 m/s
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.
A 150kg motorcycle starts from rest and accelerates at a constant rate along with a distance of 350m. The applied force is 250N and the coefficient of kinetic friction is 0.03. What is the net force applied to the motorcycle?
Answer:
205N
Explanation:
The net force (F) is the difference between the applied force([tex]F_{A}[/tex]) and the kinetic frictional force([tex]F_{R}[/tex]). i.e
F = [tex]F_{A}[/tex] - [tex]F_{R}[/tex] -----------------(i)
Note that;
[tex]F_{R}[/tex] = μmg
Where;
μ = coefficient of kinetic friction
m = mass of the body
g = acceleration due to gravity = 10m/s²
Equation (i) then becomes;
F = [tex]F_{A}[/tex] - μmg -------------------(ii)
Given from question;
m = mass of motorcycle = 150kg
μ = 0.03
[tex]F_{A}[/tex] = 250N
Substitute these values into equation (ii) as follows;
F = 250 - (0.03 x 150 x 10)
F = 250 - (45)
F = 205N
Therefore, the net force applied to the motorcycle is 205N
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.
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.
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
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
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 .......
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:
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 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.
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
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?