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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:

To 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:

After 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.

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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:

Answer:

kinetic energy

Explanation:

it is most common

Answer:

In marine ecosystems, climate change is associated with concurrent shifts in temperature, circulation, stratification, nutrient input, oxygen content, and ocean acidification. There are also strong linkages between climate and species distributions, phenology, and demography.

Explanation:

Mark her brainliest

Answer:

Continental slope

Answer: The answer is Seamount. A seamount is  a submarine mountain located  on oceanic crust near mid-ocean. The image shows a very long seamount in Massachusetts and that is formed by volcanic activity in New England Seamounts.

Answer:

heat and power

Explanation:

is the simultaneous production of electricity and heat both of which are used

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.  

Answer:

150J

Explanation:

Pi = Pf + Kf

200 = 50 + Kf

---> Kf = 150J

The kinetic energy of the swing at its lowest point is 150 J.

Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.

Given in the question the potential energy of a swing is 200 J at its highest point and 50 J at its lowest point

Pi = Pf + K E

200 = 50 + K E

K E = 150 J

The kinetic energy of the swing at its lowest point is 150 J.

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Answer:

the answer is the diagram B

Answer:

90.15K

Explanation:

The formula is x°C + 273.15 = yK

Answer:

(-183°C) = 90.15K

Explanation:

-183°C is given

Now,

K = °C + 273

K = (-183) + 273.15

K = 90.15

Thus, (-183°C) = 90.15K

-TheUnknownScientist

ah=d=75m= 0.15s A B C Hola cómo estás das que ases de bueno amiga

Answer:

(C) HBr is an acid .......

Answer:

Solution given:

frequency[f]=60,500,000Hz

velocity[V]=300,000,000m/s

wave length=?

we have

wave length=[tex] \frac{V}{f} [/tex]

=[tex] \frac{300,000,000}{60,500,000} [/tex]

=[tex] \frac{3000}{605} [/tex]=4.96 m

Option A.4.96m

Answer:

4.96

Explanation:

Wavelength = Speed ( velocity ) over Frequency

If frequency = 60,500,00 and Velocity = 300,000,000

Then, Wavelength = [tex]\frac{300,000,000}{60,500,00}[/tex] which is equivalent to 4.96

Answer:

b.      

If you disconnect the wire, the magnetic field disappears and the nail is no longer a magnet. ... The current flowing through the wire makes the wire hot and drains the battery quickly.

Explanation:

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.

Answer: 0.899

Explanation:

acellus

Answer: 0.899

Explanation: It's right in acellus I just did it

Respuesta:

a) 12.3 m/s²

b) 153.75 m

c) 36.9 m/s

Explicación:

Paso 1: Información provista

Paso 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

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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:

Answer:

The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.

Explanation:

I hope that helps! (B is the answer)

The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.

A push or pull that an object experiences as a result of interacting with another item is known as a force. Every time two items interact, a force is exerted on each of the objects.

The force is no longer felt by the two objects when the interaction ends. Only when there is interaction do forces actually exist.

Action-at-a-distance forces are those that happen even when the two interacting objects are not physically touching each other but are nevertheless able to push or pull against each other despite their physical separation.

Therefore, The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.

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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

Answer:

Frequency or amplitude

Explanation:

nun

Answer:

Amplitude

Explanation:

The lower the amplitude, the lower the frequency.

Answer:

0.923

Explanation:

Use the formula current equals voltage /resistance

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

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

Answer:

0.175g

Explanation:

A = A02^-(t/hl)

= (5.6g)2^-(750/150)

= 0.175g

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.

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.

Answer:

The car's kinetic energy is 751,500 J.

The car's potential energy is 0 J.

Explanation:

The kinetic energy equation is used as KE = 1/2mv^2 and the potential energy equation is used as PE = mgh.  Your mass for the car is 1670 kg and the velocity would be 30 m/s.  30^2 would equal to 900 and you multiply that by 1670 for 1,503,000.  Divide that number by 2 since there is 1/2 behind it to get your car's kinetic energy which is 751,500 J.

The potential energy which is calculated by mass times gravitational energy times height would be 0 J.  Because the car is at a standard height on the ground, it would make sense for the height to be 0 meters and when multiplying it, your total potential energy would be 0 J.