this one too!! need just 1 answer about this system

The statement the power of an electric heater is 1200 W means that the electric heater used up 1200 J of electric energy in one second.

When the velocity of a moving body is doubled, its kinetic energy will become four times its initial kinetic energy.

Power is the rate at which energy is used up. The s.i unit of power is Watt (W).

From the question, if an electric heater is 1200 W, it means that the electric heater used up 1200 J of electric energy in one second

Kinetic energy is the energy of a body in motion.

The formula for the kinetic energy of a body is given as

From the equation above, it can be seen that if the velocity of a moving body is doubled, the kinetic energy of the body will become four times the initial kinetic energy of the body.

Hence, The statement the power of an electric heater is 1200 W means that the electric heater used up 1200 J of electric energy in one second.

When the velocity of a moving body is doubled, its kinetic energy will become four times its initial kinetic energy.

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Answer:

The formula is the form -

m λ = d sin Θ

As the wavelength λ is decreased sin Θ will also decrease.

One can see from the derivation that as the wavelength, being considered,

is decreased the dispersion will also decrease.

The stars which they should bet on is  D) a star of about 8% the mass of our Sun.

This refers to the astronomical object which is very far away in the galaxy and and of which the closest star to the Earth is in fact the Sun.

With this in mind, we can see that the students are making bets about the time different stars will take to evolve and want to know which star will become a red giant first so they should bet on a star of about 8% the mass of our Sun.

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Answer:

PV = nRT

Explanation:

The Ideal Gas Equation shows the relation between 4 factors :-

⇒ R is the molar gas constant included so they are equal to each other, without it, they would just be proportional

The equation :-

⇒ PV = nRT

Answer:

no

Explanation:

An electron is one of the components of an atom, so it cannot be larger than that.

Answer:

No, it's not.

Explanation:

The tightly packed nucleus is 100,000 times smaller than the electron cloud.

Explanation:

Transverse wave

Longitudinal wave

Answer: atoms that are attracted to each other because the bonds that form between them can support the creation of the structure

Explanation:

Answer:

Changing nuclear energy to radiant energy

Explanation:

   Conversely, potential energy is a type of energy stored in an object, which can be converted to kinetic energy.

   Nuclear energy is a type of potential energy because this energy is stored in the atomic nucleus.

In conclusion, changing nuclear energy to radiant energy is an example of transforming potential energy into kinetic energy.

Answer:

if you stand still, that's potential energy, and if you move that's kinetic energy.

Explanation:

When standing still, you aren't moving, which the potential energy now is enact, but if you move a muscle, even the tiniest one, it will cause a transformation into kinetic energy.

Answer:

Dipole

Explanation:

A pair of opposite electric charges of equal magnitude is called a(n)

Answer:

Dipole

Explanation:

The parenting style that can be described as restrictive and controlling is called authoritarian.

The rejection of political plurality, the use of strong central power to maintain the political status quo, and reductions in the rule of law,

The separation of powers and democratic voting characterize authoritarianism.

Many typologies of authoritarian systems of administration have been developed by political scientists.

Authoritarian governments can be autocratic or oligarchic, and they can be founded on party or military authority.

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Answer: (A) The number of waves that pass a point in a certain amount of time.  

Explanation:

Electromagnetic waves are categorized according to their frequency f or, equivalently, according to their wavelength λ = c/f. Visible light has a wavelength range from ~400 nm to ~700 nm.

Frequency: Is the number of waves that pass a certain point in a specified amount of time.

Trough: The low point of the wave cycle.

Wavelength: The distance between two successive peaks.

Electromagnetic wave: One of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity.

The net torque on the seesaw is 294 Nm.

Torque is the force that tends to rotate the body to which it was applied.

To calculate the net torque, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The net torque on the seesaw is 294 Nm.

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Answer:

C. Stimulus = temperature, response = sweat

Explanation:

So basically, stimulus means cause and response means effect.

So, the cause in this case is temperature, while the response to the temperature is sweating.

Answer:

C. In a valley .

.............................

Earth would be an icy wasteland if greenhouse gases were not present. Greenhouse gases keep our planet livable by retaining some of the Earth's heat energy, preventing it from escaping into space. The greenhouse effect refers to the trapping of heat.

Answer:

The potential difference across the terminals of a battery is 8. 4v when there is a current of 1. 50 a in the ba

Explanation:

The potential difference across the terminals of a battery is `8.4 V` when there is a current of `1.50 A` in the battery from the negative to the positive terminal. When the current is `3.50 Air`, the reverse direction, the potential difference becomes `9.4 V`. <br>(a) What is the internal resistance of the battery? <br>(b) What is the emf of the battery?

Answer:

Bowling ball

Explanation:

The bowling ball's mass will make it roll down the incline faster than the lighter volleyball.

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Answer: See below

Explanation:

[tex]\\ \mathrm{Given:} \\\mathrm{Mass \ of \ first \ car}$\left(m_{1}\right)=1383 \mathrm{~kg}$ \\ Velocity $\left(\overrightarrow{V_{1}}\right)=-11.2\ {\math} \mathrm{m} / \mathrm{s}$\\ Mass of second car -$\left(m_{2}\right)=1732 \mathrm{~kg}$\\ Velocity $\left(\vec{v}_{2}\right)=31.3 {\math} \mathrm{m} / \mathrm{s}$[/tex]

[tex]m_{1} \vec{v}_{1}+m_{2} \vec{v}_{2}=\left(m_{1}+m_{2}\right) \vec{v} \\1383(-11.2 {\math})+1732(31.3 {\math}) \\=(1383+1732) \vec{v} \\-15489.6 {\math}+54211.6 {\math}=3115 \vec{v} \\ \vec{v}=(17.4 {\math}-4.972 {\math}) \ \mathrm{m/s}[/tex]

[tex]\text { So magnitude } \vec{|v|} =\sqrt{(17.4)^{2}+(-4.972)^{2}} \\ =\sqrt{327.605} \\ =18.099 \mathrm \ {m/s} \\[/tex]

[tex]\text { Direction } \\\theta=\tan ^{-1}\left(\frac{-4.972}{17.4}\right) \\\theta=-15.945^{\circ}\end{gathered}[/tex]

Therefore, both cars move with a velocity of 18.099 m/s in the direction of 15.945° downward from the x-axis (east)

Answer:

Explanation:

Apply conservation of momentum in N-S direction:

Initial momentum: 1383*(-11.2) + 1732*(0) = -15490

Final momentum: (1383 + 1732) * Final N-S velocity = -15490

Final velocity = 1549/(1383+1732) = -4.97 m/s (-ve means South)

Repeat the same for E-W direction:

Initial momentum: 1383*(0) + 1732*(31.3) = 54211.6

Final momentum: (1383 + 1732) * Final E-W velocity = 54211.6

Final velocity = 54211.6/(1383+1732) = 17.4 m/s (+ve means East)

Combining, the final velocity = sqrt (-4.97^2 + 17.4^2) = 18.10 m/s

at direction of arctan(17.4/4.97) = 74 degree South of East.

Answer:

the answer is white they combine to give white

Answer:

they are primary colors of light.

(pls don't delete this answer because I am just trying to help)

What led to Henry Ford’s success as an entrepreneur?

What happens when volcanoes release greenhouse gases into the atmosphere?

Answer:

B buoyant force (mass) = 600 - 400 = 200 g       (I)

upthrust is 200 g due to decrease in apparent body weight

(Note that g is being treated as force here when it is actually mass)

D = M / V     definition of density

since density of water is 1 (1 g / cm^3)

from (I) the equivalent volume of water is 200 cm^3 since the upthrust will equal the weight of the water displaced

Relative density of solid is 600 g / 200 g = 3     (weight of solid vs the weight of the water displaced

D = 3 g / cm^3       density of solit

For a stationary siren on a firehouse is blaring at 81Hz. Assume the speed of sound to be 343m/s, the frequency perceived  is mathematically given as'

F=81.721Hz

Generally, the equation for the doppler effect  is mathematically given as

[tex]F'=\frac{vs+v}{vs}*f[/tex]

Therefore

F=81(343+3.05556)/343

F=81.721Hz

In conclusion, the frequency is

F=81.721Hz

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If an electric circuit has zero Ampere (0A) of current running through it, then the voltage must be zero.

At constant temperature, Ohm's law says that the current flowing through an electric circuit is directly proportional to the voltage

Also, the current flowing through an electric circuit is inversely proportional to the resistance in the electric circuit.

This means that the magnitude of voltage (potential difference) is significantly reliant on the value of current flowing through an electric circuit.

This formula expresses Ohm's law mathematically.

V=IR

Where:

V is the voltage is measured in volts.

I denote the current in amperes.

R denotes the resistance in ohms.

Finally, if an electric circuit has zero ampere (0A) of current flowing through it, the voltage must also be zero.

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Answer:

voltage, zero

Explanation:

Building a pipe organ with open-tube pipes spanning the range from 25 hz to 19 khz will require the length of the shortest pipe to be 0.018m

This is defined as the measurement or extent of a substance from end to end. The formula is shown below:

L = v/f where v is speed , f is frequency

f1 = 25hz , f2 = 19khz

The length for both sides is seen below:

l1 = 343/25 = 13.72m

l2 = 343/19000 = 0.018m.

The length of the shortest pipe is therefore 0.018m.

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The frequency of a repeated event is the number of occurrences per unit of time. The length of the shortest pipe is 0.018 m.

The frequency of a repeated event is the number of occurrences per unit of time. It is also known as temporal frequency to distinguish it from spatial frequency, and ordinary frequency to distinguish it from angular frequency.

The formula of the length is given by the formula,

[tex]L=\dfrac vf[/tex]

where v is the velocity of the substance and f is the frequency.

Given that the speed of the sound in air is 343 m/sec, while the frequency is tanging from 25Hz to 19 kHz.

Therefore, the length of the pipe will be,

[tex]L=\dfrac vf\\\\L_1=\dfrac{343}{25} = 13.72\rm\ m[/tex]

[tex]L_2=\dfrac{343}{19 \times 1000} = 0.018\rm\ m[/tex]

Hence, the length of the shortest pipe is 0.018 m.

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