How much heat does it take to melt a 0.234 kg ice cube at its melting point?​

Answer:

It would depend on the amount of years.

Explanation:

I don’t think this is very helpful-

Have a great day!

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ii) The pressure difference in the two containers starts the flow of the water from container A to B until the pressure becomes equal in both the containers. Pressure causes force on water, because pressure = force/area

Answer:

4 ohms

Explanation:

V = I R

12 = 3 R

R = 4 ohms

Answer:

Pedal / Front Gear = 18 / 9 = 2

Front Gear /Rear Gear = 9 / 4 = 2 1/4

Rear Gear / Wheel = 4 / 33 = .121

2 * 2 1/4 * .121 = ,55

C) Seems true

Answer:

The first reactant is methane, the next is oxygen, the first product is carbon dioxide and the second product is water.

The word equation is:

methane + oxygen → carbon dioxide + water

The balanced symbol equation is:

CH₄ + 2O₂ → CO₂ + 2H₂O

Explanation:

In any combustion reaction, fuel is burned in the presence of oxygen to produce carbon dioxide and water.

An equation is balanced when there are the same number of atoms of each element on both sides of the arrow.

Hope this helps!

Sugar molecules present at the bottom of solution due to more mass.

Table sugar is more dense than water due to the presence of more mass of sugar molecule as compared to water. We know that denser objects has more mass so that's why sugar molecules present at the bottom of solution due to more mass.

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Answer:

[tex]2360448seconds[/tex]

Explanation:

Dimensional analysis is attached.

The material the parachute is made out of" will not be a suitable control variable as it is needed in the research.

It should be noted that a control variable simply means any variable that is held constant in a research.

In this case, the material the parachute is made out of" will not be a suitable control variable as it is needed in the research.

Therefore, it's false.

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How much should the telescope accelerate towards or away from the sun?

The angular velocity depends on the length of the orbit and the orbital speed of the telescope?

Answer:The difference between air temperature and dew point is less than 4.5 degrees Fahrenheit when fog can form.

Explanation:This can occur because of added moisture or falling air temperatures. The difference between air temperature and dew point is less than 4.5 degrees Fahrenheit when fog forms.

Answer:

Precipitation formed

Temperature change

fizzing and hissing

bubbles

change in state

Explanation:

Answer:

Precipitation formed

Temperature change

fizzing and hissing

bubbles

change in state

Explanation:

Answer:

A or B you choose

Explanation:

This is called current electricity or an electric current. A lightning bolt is one example of an electric current, although it does not last very long. Electric currents are also involved in powering all the electrical appliances that you use, from washing machines to flashlights and from telephones to MP3 players.

what is an electrical current, amp, ampere Current is the flow of electrons. When a circuit is closed then a current of electrons can flow and when a circuit is open then no current can flow. We can measure the flow of electrons just like you can measure the flow of water through a pipe.

High energetic winds turning generator , causing electrons to flow into power lines is an example of current electricity. Remaining all are examples of static electricity .

The movement of electrons from one area of the circuit to another is referred to as current electricity. Free electrons flow between two points when two bodies with different potentials are connected by a wire, until both objects reach the same potential, at which point the current stops.

Current flows until a potential difference exists throughout the conductor. The following techniques can be used to produce current electricity:

1. Through the passage of a metal wire through a magnetic field (Both alternating current and direct current can be generated by the following method)

2.Utilizing a battery and chemical reactions (Direct current can be generated through this method)

Here, the wind's kinetic energy provide the mechanical energy for the generator to to produce power lines. Hence option A is correct. All others are static electricity for short time only.

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Answer:

153000J

Explanation:

[tex]work \: done = \: force \times distance \\ force = mass \times acceleration \: due \: to \: gravity \\ = 51 \times 10 \\ = 510newton \\ work \: done = 510 \times 300 \\ = 153000joules[/tex]

Answer:

It is called Motion Energy

Explanation:

Answer:

188 v

Explanation:

The average of a sine wave is .637 times the peak value

.637 x = 120

x = 120 / .637 = 188 v

The voltage in an American household is 120 v. however because we use a/c power, the voltage is oscillating between two maximums, then the maximum or peak voltage required to produce an average voltage of 120 Volts would be 76.44 Volts.

The rate of doing work is known as power. The Si unit of power is the watt.

Power = work / time

The mathematical expression for the power is as follows

P = VI

As given in the problem, the voltage in American household is 120 v. however, because we use a/c power, the voltage is oscillating between two maximums.

The average voltage (VAV) of a sinusoidal waveform is determined by multiplying the peak voltage value by the constant 0.637, which is two divided by pi (π).

The maximum voltage = 120 × 0.637

                                      =  76.44 Volts

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λ = 5 x 10^-7 m, i.e the wavelength

the energy in the wave.

= c / λ

c =( 3 x 10^ 8 m/s)

f = 3x10^8ms-¹ /5 x10^-7m

= 6x10^14 Hz.

Answer:

5. 25 [kg].

Explanation:

1) the final ratio is:

m_20kg *g=m*g/cos37°; ⇒ m= m_20kg / cos37°;

2) answer is:

m=20/0.8=25 [kg].

The energy transformation that is happening in this process is mechanical energy to chemical energy.

According to conservation of energy, energy can not be distroyed and cannot be created, but can only be transformed from one form to another.

The batteries of some flashlights can be charged by turning a handle. The energy transformation that is happening in this process is mechanical energy to chemical energy. The chemical energy will transform to electrical energy which will eventually transform to light energy.

The turning of the handle is mechanical and the energy in battery is chemical.

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Answer:

D)it decreases to 1/9 its original magnitude

[tex]\text{Kinetic energy,}\\\\~~~~E_k = \dfrac 12 mv^2\\\\\implies v^2 = \dfrac{2 E_k}m\\\\\implies v = \sqrt{\dfrac{2E_k}m}\\\\\implies v = \sqrt{\dfrac{2 \times 12000}{40}}\\\\\implies v = 24.49~~ \text{ms}^{-1}\\\\\text{Velocity of the platform diver is 24.49 m/s}[/tex]

Hi! Look below

Hence

[tex]\\ \rm\Rrightarrow KE\propto m[/tex]

[tex]\\ \rm\Rrightarrow KE\propto v^2[/tex]

Option A

Answer:

A. V²

Explanation:

The kinetic energy of a body is the energy by virtue of its motion.

[tex]k.e = \frac{1}{2 }m v {}^{2} [/tex]

Where V is the velocity

and m is the mass

1/2 is the constant term. So we can write as

K.Eαm and K.E.αv²

Answer:

No

Explanation:

Because there won't be any momentum

Answer:

No, because you need momentum and you won’t have any momentum there.

Explanation:

I apologize if it is incorrect-

I hope it helps! Have a great day!

Anygays-

Based on the information provided, the Power of the electric forklift to the nearest hundred is 12,000 W.

The formula for calculating power in physics is given as:

P = E/t; where P = Power, E is energy and t is time in seconds. It is also given as :

P = W/Δt

Recall that power is defined as the amount of work done within a specific amount of time.

Where W = Work and; Δt = time elapsed.

Recall that Work (w) = Force x distance

Force here is usually domiciled in Newtons while distance is usually domiciled in meters.

7000 pounds or Lbs to Newtons is

7000 x 4.4482216153 = 31137.551307 N

So let's convert the distance to Meters.

1 foot = 0.3048m

Therefore, 76ft = 23.1648 m

Thus, Work = 31137.551307 X 23.1648 (That is Force in Newtons x distance in meters.)

Work = 721, 295.148516 N·m

Recall that power is given as:

P = W/Δt

= 721,300/60 seconds

= 12,021.6666667, to the nearest hundred, and we have:

P = 12,000 W

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Answer:

43.2

2.4×18

18 is the molar mass of water

multiply the no of moles with the molar mass to find the mass of the substance

Answer:

43.25 grams

Explanation:

one mole of H2O is 18.02 grams

18.02*2.4=43.248 grams

Answer:

3,6,9 is the answer it might be right but not sure

The balanced equation is C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex]  → 3CO[tex]_2[/tex]  +  4H[tex]_2[/tex]O. An imbalanced chemical equation describes the products and reactants of a chemical process.

The balanced equation is indeed a chemical reaction equation in which the overall charge and the quantity of atoms for every element inside the reaction are identical for both the products and the reactants. In other terms, the mass plus charge on both side of the reaction are balanced.

An imbalanced chemical equation describes the products and reactants of a chemical process but does not include the quantities needed to meet mass conservation.

The carbon atom on lefts side is 3 while on right side it is 1

C[tex]_3[/tex]H[tex]_8[/tex] + O[tex]_2[/tex]  → 3CO[tex]_2[/tex]  +  H[tex]_2[/tex]O

now balance oxygen

C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex]  → 3CO[tex]_2[/tex]  +  4H[tex]_2[/tex]O

Therefore, the balanced equation is C[tex]_3[/tex]H[tex]_8[/tex] + 5O[tex]_2[/tex]  → 3CO[tex]_2[/tex]  +  4H[tex]_2[/tex]O.

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The nuclear fission reaction of Uranium-235 atom produces Barium-141, Krypton-92 and 3 neutrons.

Nuclear fission is a nuclear reaction in which the atomic nucleus of a heavier element disintegrates or splits to produce two or more atoms of elements with smaller nuclei.

The nuclear fission reaction in which a neutron is used to bombard the nucleus of Uranium-235 atom to produce Barium-141, Krypton-92 and 3 neutrons is given below

[tex]_{235}U + \: _{1}n^{o} \rightarrow \: _{141}Ba+ \: _{92}Kr + 3 \: _{1}n^{o} [/tex]

Therefore, the nuclear fission reaction of Uranium-235 atom produces Barium-141, Krypton-92 and 3 neutrons.

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