whos correct and why? please help me with this

Answer:

The value of R₂ is equal to 24.75 ohms.

Explanation:

Given that,

Two resistors, R₁ and R₂, are  connected in parallel.

The equivalent resistance is 14.5 ohms

We need to find the value of R₂.

When two resistors are connected in parallel. The equivalent resistance is given by :

[tex]\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}\\\\\dfrac{1}{14.5}=\dfrac{1}{35}+\dfrac{1}{R_2}\\\\\dfrac{1}{R_2}=\dfrac{1}{14.5}-\dfrac{1}{35}\\\\\dfrac{1}{R_2}=0.04039\\\\R_2=\dfrac{1}{0.04039}\\\\R_2=24.75\ \Omega[/tex]

So, the value of R₂ is equal to 24.75 ohms.

Answer: 0.28 A

Explanation:

Answer: Alternative D.

------------------------------------------------

To calculate the gravitational weight of other planets, the formula is used:

[tex]\large\boxed{{\mathbf{P = m \cdot g}}}[/tex]

Data:

Mass(m): 1000 N

Gravity(g): 0.61

Weight(p): ?

We replace data:

P = m × g

P = 1000 N × 0.61

P = 610 N

Result: Its weight on Pluto will be 610 Newtons (Alternative D).

Answer:

50,000

Explanation:

when we say significant digits we mean the numbers that matter when stating the value of the number.

0.00030 can be written as 0.0003 without affecting it's value, the last zero is not significant.

50,000 all of the numbers here are significant to its value if we take away a zero it becomes 5,000 which is not equal to 50,000. so every digit here is significant

100.0300 can be written as 100.03 without loosing any value

500.00 can be written as 500 without loosing any value. ( think of this as $500.00, this also equals $500)

Answer:

v = 16.98 km/s

Explanation:

Given that,

Distance, d = 4500 km

Time, t = 265 s

We need to find its average speed. The total distance covered divided by total time taken is called average speed of an object. So,

[tex]v=\dfrac{4500\ km}{265\ s}\\\\=16.98\ km/s[/tex]

So, the average speed is 16.98 km/s.

Answer:

Explanation:

Given the following data;

Initial volume = 2.5 L

Initial temperature = 350 K

Final volume = 2V1 = 2*2.5 = 5 L

To find the final temperature, we would use Charles law;

Answer:

Sufrirá una deflección en su recorrido.

Explanation:

Las partículas alfa son nucleos de He (dos protones mas dos neutrones), por lo tanto tienen una carga neta positiva.

Ahora, al acercarse al nucleo de un átomo con muchos protones y con baja energía, la partícula alfa sufrirá una deflección en su recorrido debido a las fuerzas de repulsión electrostática que siente la partícula, ya que el nucelo posee caraga positiva.

Espero te haya sido de ayuda.

Answer:

29.7 m/s fast, velocity is 29.7 m/s

Explanation:

Applying,

v² = u²+2gs...................... Equation 1

Where v = final velocity, u = initial velocity, g = acceleration due to gravity, s = distance.

Given: u = 0 m/s (dropped from height), s = 45 m

Constant: g = 9.8 m/s²

Substitute these values into equation 1

v² = 0²+2×9.8×45

v² = 882

v = √(882)

v = 29.7 m/s.

Hence the stone will be moving 29.7 m/s fast and the velocity is also 29.7 m/s

Answer: The motion of the object will remain the same

Explanation:

Answer:

Neodymium (Nd)

Explanation:

An element is made up of atom, which contains three subatomic particles namely; proton, electron, and neutron. In a neutral atom, the number of protons determines the atomic number of that element and the atomic number of an element is the identity of that element in the periodic table.

Hence, a change in the proton number of an element means a change in the atomic number and ultimately a change of that element. In this question, Europium (Eu) element with atomic number, 63, loses three protons. This means that that atom now has 60 protons, which denotes the atomic number of another element called Neodymium (Nd).

Therefore, Europium (Eu) element has become Neodymium (Nd) due to loss of protons.

Answer:

Explain why it is not advisable to sterilise a clinical thermometer on boiling water at normal atmospheric temperature. A clinical thermometer has small temperature range. The glass will crack/burst due to excessive pressure created by expansion of mercury.

Answer:

608.9 nm

Explanation:

trust me cutie

The wavelength of light in nanometers is 0.017 x [tex]10^{3}[/tex] nm.

We have -

d = [tex]2.25\times 10^{-6}[/tex]

n = 1 = order

θ = 15.7 degrees

We have to calculate the wavelength of light (λ) in nanometers.

Diffraction is defined as the bending or spreading of light waves as it passes through the edge of an object or through a small slit (size of slit should be very very less then wavelength of light) is called diffraction.

According to the question, we can use the following relation to calculate wavelength as -

d sinθ = nλ

λ = [tex]\frac{dsin\theta}{n}[/tex]

λ = d sinθ               (since n = 1)

λ = [tex]2.25\times 10^{-6}[/tex] x sin (15.7)

λ = 0.0079 x 2.25 x [tex]10^{-6}[/tex]

λ = 0.0177 x [tex]10^{-6}[/tex] m

We know that -

1 nanometer = [tex]10^{-9}[/tex] m

1 m = [tex]\frac{1}{10^{-9} }[/tex]

0.017 x [tex]10^{-6}[/tex] m will be equal to = [tex]\frac{0.017\times 10^{-6} }{10^{-9} }[/tex] = 0.0177 x [tex]10^{3}[/tex] nm

Hence, the wavelength of light in nano meters is 0.0177 x [tex]10^{3}[/tex] nm.

To solve more questions on Diffraction, visit the link below -

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Answer:

high sunlight intensity

high wind speed

Explanation:

The environmental conditions in the UK on 7th June 2017 are improved because the electricity generation in the UK is done by the renewable sources of energy.

A renewable resource,  is a type of natural resource that will refill to replace the fraction destroyed by consumption  in a finite length of time in a human timescale, either naturally or other periodic processes.

The environmental conditions in the UK are improved on 7th June 2017 due to following reasons ;

1. The renewable energy sources create comparatively low amounts of Gas (GHG) emissions and traditional pollution,

2. During manufacture and transportation. They do emit some emissions and pollutants.

3. Using fossil fuels to generate electricity that creates no greenhouse gas emissions and lowers some forms of air pollution.

4. Increasing energy diversity and minimizing reliance on foreign fuels.

To learn more about the renewable resources, refer to the link;

https://brainly.com/question/19604560

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Answer:

????????....???????? :/

Answer:

The acceleration of the bowling ball is

1.875 m/s2

Answer:

When an object moves in a straight line at a steady speed, we can calculate its speed if we know how far it travels and how long it takes. This equation shows the relationship between speed, distance traveled and time taken: Speed is distance divided by the time taken.

Explanation:

Thats what goog.le said so if its wrong blame G O O G L E

Answer:

when the direction of the Current changes.

Explanation:

Electromagnet refers to an iron ore wrapped around with a coil of wire, in presence of electric current. As it acts like a magnet, when current is passed through it.

The north & south poles of magnetic fields produced by such magnet, change with direction of current passed through it.

Answer:

current

Explanation:

edge2021

Answer:

A. 10

Explanation:

it increases by 10 each level

mark brainliest

Answer:

The speed of light in glycerol is 2.04×108 m/s .

Explanation:

The speed of light in glycerol will be 2.03 ×10⁷ m/sec. The speed of light is found as the ratio of the speed of light in air and the refractive index.

The level of bending of a light beam as it goes from one medium to another is known as the refractive index of the medium.

The frequency of the wave is given as;

[tex]\rm f = 5.09 \times 10^{14} Hz[/tex]

The refractive index of ethyl alcohol is n=1.4722

The substance's index of refraction yields the ratio of light speed in a vacuum to light speed in that medium, the speed of light is sound as;

[tex]\rm n = \frac{C}{v} \\\\ \rm v = \frac{C}{n} \\\\ \rm v = \frac{3 \times 10^8}{1.4722} \\\\ v= 20377660.00\ m/sec \\\\ v= 2.03 \times 10^7 m/sec[/tex]

Hence, the speed of light in glycerol will be 2.03 ×10⁷ m/sec.

To learn more about the refractive index, refer to the link;

https://brainly.com/question/23750645

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Answer:

R = 12 ohm

Explanation:

Resistance are in parallel

1 ÷ Resistance = 1 ÷ 20 + 1 ÷ 30

1/R = 50/600

1/R = 1/12

R = 12 ohm

Answer:

1. 30,000 Kelvin, or 53,540 Farenheit, or 29,726 Celcius

2. i'm not sure, I'm sorry. I know that there are several, and one of them is helium.

3. This fusion changes the inner composition of the star, eventually it becomes a red giant or supergiant

Explanation:

Hope this helps :)

Answer:

yes its benefit

Explanation:

using fossil fuel is bad so this is good because they aren't using it

Explanation:

I believe it is b or c. most likely b

Answer:

Height of the building = 35.78 m

Explanation:

Given that,

The time period of a pendulum is, T = 12 s

We need to find the height of the building. The formula for the time period of a pendulum is given by :

[tex]T=2\pi \sqrt{\dfrac{l}{g}}[/tex]

Where

l is the height of the building

[tex]l=\dfrac{T^2g}{4\pi^2}\\\\l=\dfrac{(12)^2\times 9.8}{4\times 3.14^2}\\\\l=35.78\ m[/tex]

So, the height of the building is 35.78 m.