Can anyone help me with this

Answer:

Distancia = 50.04 metros

Explanation:

Dados los siguientes datos;

Velocidad = 10 km/h

Tiempo = 18 segundos

Para encontrar la distancia;

Conversión:

10 km/h = 10 * 1000/3600 = 2.78 m/s

Distancia = velocidad * tiempo

Distancia = 2.78 * 18

Distancia = 50.04 metros

Por lo tanto, el tren viajaría 50.04 metros antes de detenerse por completo.

Answer:

yes

Explanation:

yes

Answer:

  W = 260 J

Explanation:

Work is defined by

          W = F. d

Bold type indicates vectors,

          W = F d cos θ

where tea is the angle between the force and the displacement, in this case the force is parallel to the displacement so the angle is zero and the

          cos 0=1

let's calculate

           W = 40 6.5

           W = 260 J

Answer:

use different energy sources

Explanation:

Answer:

1. Solar wind: a stream of plasma.

2. Coronal mass ejection: includes prominences and solar flares.

3. Gamma ray photon: energy released during nuclear fusion.

Explanation:

1. Solar wind: a stream of plasma i.e charged particles such as ions, protons, alpha, and electrons that continuously escape at high speed from the Sun because of the very hot plasma contained in the solar corona.

2. Coronal mass ejection: includes prominences and solar flares that flow outward into interplanetary space. Thus, it's a release of solar wind plasma and magnetic field from the outer atmosphere or corona of the sun.

Additionally, a solar prominence is also known as filament and it can be defined as a large, bright, dense cloud of luminous ionized gas such as hydrogen, sodium calcium, etc., that erupts (extends) from the surface of the sun. It can linger in the corona for a very long time, reaching hundreds of thousands of kilometers into the sun's atmosphere (space).

3. Gamma ray photon: energy released during nuclear fusion of radioactive isotopes such as cobalt-60 or cesium-137. It has the shortest wavelength and highest energy in the electromagnetic radiation spectrum.

An electromagnetic spectrum refers to a range of frequency and wavelength that an electromagnetic wave is distributed or extends. The electromagnetic spectrum comprises of gamma rays, visible light, ultraviolet radiation, x-rays, radio waves, and infrared radiation.

Answer:

Explanation:

The light reflects off a rough surface, what happens to the image is that will occurs No image is formed.

Reflection of light happens when a ray of light strikes a reflective surface and returns to its original medium. This phenomenon allows us to see all bodies that do not produce their own light, called secondary sources of light or simply illuminated bodies.

Diffuse reflection occurs when light reflects off a rough surface and forms a blurry image or no image at all.

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Answer:

Explanation:

a )

hear energy required to melt 1 g of ice = 340 J ,

hear energy required to melt 80 g of ice = 340 x 80  J = 27220 J .

b ) energy gained by the melted ice ( water at O°C ) = m ct

where m is mass of water , s is specific heat and t is rise in temperature

= 80 x 4.2 x ( 8°C - 0°C)

= 2688 J .

c )

energy lost by lime juice = energy gained by ice and water

= 27220 J + 2688 J .

= 29908 J .

d )

Let specific heat required be S

Heat lost by lime juice = M S T

M is mass of lime juice , S is specific heat , T is decrease in temperature

= 320 g x S x ( 29 - 8 )°C

= 6720 S

For equilibrium

Heat lost = heat gained

6720 S = 29908 J

S = 4.45 J /g °C .

Answer:

I know dude

Explanation:

-22000

Answer:

-22000

Explanation:

acellus

Answer:

Option C

Explanation:

Light is an electromagnetic wave as it has characteristics of both electrical and magnetic waves. It is not a mechanical wave. Water and sound wave are mechanical wave as they need some medium to travel while light do not need any medium to travel.

Hence, option C is correct

Answer:

Ordovician

Explanation:

Answer:

Ordovician: 470 million years ago

Question: A tire on a car has an air pressure of 32 PSI when it is 62 ° F. Overnight the temperature drops to 40° F. What happens to the pressure in the tire overnight

Answer:

30.65 psi

Explanation:

Applying,

P/T = P'/T'..................... Equation 1

Where P = Initial pressure, T = Initial Temperature, P' = Final pressure, T'= Final Temperature.

make P' the subject of the equation

P' = PT'/T................. Equation 2

From the question,

Given: P = 32 psi, T = 62 ° F = 289.817 K, T' = 40 ° F = 277.594 K

Substitute these values into equation 2

P' = (32×277.594)/(289.817)

P' = 30.65 psi

Hence the new pressure in the tire is 30.65 psi

Explanation:

[tex]molarity \: \: constant \: = 8.3j mol {}^{- 1} {k}^{- 1} [/tex]

[tex] \frac{3125}{2465.1} = 2465.1 \24651[/tex]

The no of moles are there in a 2,500 cm sample of oxygen at a temperature of 24 °C and a pressure of 125 kPa will be 1.27.

It is the relationship between the pressure,volume and the temperature. Ideal gas equation is found as;

pv=nRt

Given data is;

p(pressure) =125

v(volume) =2500 cm = 25.m³

n(number of moles) =?

T(temperature) = 24°C =24+273=297k

From Ideal gas equation ;

pv=nRt

125×25=n×8.3×297

3125=2465.1 n

n=1.27

Hence,the no of moles will be 1.27.

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Answer:

F=1.3⋅105N

Explanation:

It's common knowledge.

Answer:

A physical property of matter is electric charge. It is caused by an imbalance in the number of protons and electrons in a material. Whether there are more protons than electrons in a substance, it is positively charged if there are more electrons than protons, it is negatively charged.

Explanation:

Answer:

10,000kgm/s

Explanation:

Since we not told what to look for, we can as well find the momentum of the car.

momentum = mas * velocity

Given

Mass of the car = 2000kg

velocity = 5m/s

Substitute into the formula

Momentum = 2000 * 5

Momentum = 10000kgm/s

Hence the momentum of the car is 10,000kgm/s

Answer:

1. i. 286.81 CAL ii. 1.2 KWH

2. 3150 J

Explanation:

1.  1200 J is  the amount of energy that a clothes iron transforms per second, asks:

i. (I) How many CALs are there ?

Since the amount of energy that a clothes iron transforms per second is 1200 J. We convert this to calories.

Since 1 cal = 4.184 J,

1200 J = 1200 J × 1 cal/4.184 J = 286.81 Cal.

(II)  How many KWH are there

Since the amount of energy that a clothes iron transforms per second is 1200 J = 1200 J/s = 1200 W = 1.2 kW.

So, the amount of energy consumed in 1 hour is 1.2 kW × 1 h = 1.2 kWh = 1.2 KWH

2) One  Low consumption electric lamp has an efficiency of 30% to illuminate.  If the electrical energy used is 4,500 J, determine the value of the  missing energies.

efficiency, η = Energy output E/Energy input E' × 100 %

= E/E' × 100%

Since η = 30% and E' = 4500 J,

E = ηE'/100 % = 30 % × 4500 J/100 % = 0.3 × 4500 J = 1350 J

The missing energy, ΔE = energy input - energy output = E' - E = 4500 J - 1350 J = 3150 J

Answer:

Explanation:

Effort x effort distance = load x resistance  distance

effort distance = 8 m ,

load = 2000N

resistance distance = 1/2 m = 0.5 m

Putting the values in the equation above

effort x 8m = 2000N x .5

effort = 2000 x 0.5 / 8

= 125 N

force required = 125 N .

Answer:

Inertia.

Explanation:

Inertia can be defined as the tendency of an object or a body to continue in its state of motion or remain at rest unless acted upon by an external force.

In physics, Sir Isaac Newton's first law of motion is known as law of inertia and it states that, an object or a physical body in motion will continue in its state of motion at continuous velocity (the same speed and direction) or, if at rest, will remain at rest unless acted upon by an external force.

For example, the inertia of an object such as a shopping cart is greatly dependent or influenced by its mass; the higher quantity of matter in a shopping cart, the greater will be its tendency to continuously remain at rest.

Answer:

d. The amount of water vapor in the atmosphere would be lower because it has not evaporated  from the hydrosphere.

Explanation:

Hydrosphere is mass of water found on the water surfaces and above it. While atmosphere is the mass of air surrounding our planet. Hydrosphere includes the water that is found inside the earth's crust, on the surface and also water suspended on the air.

There is interaction between hydrosphere and atmosphere. The water gets evaporated from the hydrosphere and get vaporized to the atmosphere. This affects the humidity of the place.

The humidity tends to be lower in places where the amount of water vapor present in the atmosphere is lower as the water does not get evaporated from hydrosphere.

Answer:

we cant draw plz show to any one

Answer:

[tex]\boxed {\boxed {\sf 36 \ Newtons}}[/tex]

Explanation:

According to Newton's Second Law of Motion, force is the product of mass and acceleration.

[tex]F=m \times a[/tex]

The mass of the wagon is 12 kilograms and the acceleration is 3 meters per square second.

Substitute the values into the formula.

[tex]F= 12 \ kg \times 3 \ m/s^2[/tex]

Multiply.

[tex]F= 36 \ kg*m/s^2[/tex]

[tex]F= 36 \ N[/tex]

The force required for the 12 kilogram wagon to accelerate at 3 meters per square second is 36 Newtons.

Lithium-Ion batteries are commonly used in portable electronics and electric vehicles. These rechargeable batteries have two electrodes: one that's positively charged and contains lithium and another negative one that's typically made of graphite.

Answer:

Lithium-Ion: Li-ion batteries are commonly used in portable electronics and electric vehicles. These rechargeable batteries have two electrodes: one that's positively charged and contains lithium and another negative one that's typically made of graphite.

Explanation:

Hope this helps :)

Have a great day!

Brainliest?

Answer:

The lightbulb will not turn on because a switch is connected to it in parallel and when it is closed, like it is now, it becomes a short, by-passing the bulb completely.

Answer:

Sample Response: The lightbulb will not light because this is a short circuit. The branch without the bulb has almost no resistance, so all the current will flow through that branch instead of flowing through the bulb.

Explanation:

Edge 2021-2022 :)

Answer:

wavelength = (3×10^8 m/s)(6×10^5 Hz)

= 1.8×10^14 m

Explanation:

hug is not the only solution to help someone you can take them to Peaceful place and sit with them saying nothing.

Answer: [tex]200\Omega[/tex]

Explanation:

Given

The battery used is 6V in magnitude

The current flow is 90 mA

If the resistance of A is [tex]100\Omega[/tex]

Net resistance of the circuit is

[tex]R_{net}=\dfrac{V}{I}\\\\\Rightarrow R_{net}=\dfrac{6}{90\times 10^{-3}}\\\\\Rightarrow R_{net}=\dfrac{200}{3}\Omega[/tex]

If A and B are in parallel then their net resistance must be   [tex]\frac{200}{3}[/tex]

[tex]\dfrac{1}{\frac{200}{3}}=\dfrac{1}{100}+\dfrac{1}{R_b}\\\\\Rightarrow \dfrac{1}{R_b}=\dfrac{3}{200}-\dfrac{1}{100}\\\\\Rightarrow \dfrac{1}{R_b}=\dfrac{3-2}{200}\\\\\Rightarrow R_b=200\Omega[/tex]