Can someone please answer this, ill give you brainliest Would be very appreciated.

The time required by the 1 KW heater to raise the temperature of 10 L of water is 418.4 s

Q = MCΔT

Q = Pt

Pt = MCΔT

Divide both sides by P

t = MCΔT / P

t = (10000 × 4.184 × 10) / 1000

t = 418.4 s

Complete question

What time is required for a 1kw heater to raise the temperature of 10 liters of water to 10 degree Celsius?

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Explanation:

The integral of a velocity versus time function is a displacement versus time function

So we integrate,

[tex] {t}^{2} - t[/tex]

The integral of that is

[tex] \frac{1}{3} {t}^{3} - \frac{ {t}^{2} }{2} [/tex]

Plug in 12 for t,

[tex] \frac{1}{3} (12 {}^{3} ) - \frac{12 {}^{2} }{2} [/tex]

[tex]576 - 72 = 504[/tex]

So the displacement is 504 meters to the right.

vf = 12² - 12 = 132 m/s

a = vf' = 2t-1

at t =12 s,

a = 2(12)-1 = 23 m/s²

vf²=vi²+2ad (vi=initial velocity=0)

vf²=2ad

132² = 2 x 23 x d

d = 378.78 m

Answer:

D

Explanation:

Because we have two reactants and product

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

According to first law of reflection, we know that :

Angle made by the incident ray and normal [ i.e angle of incidence ] is always equal to Angle made by the reflected ray and normal [ i.e Angle of reflection ]

Therefore, we can say that the missing angle (angle of reflection) has the same value as the angle of incidence which is equal to 45°

Please read the statement through to understand the procedure ~

Answer:

Select the correct answer. kristina works out seven days a week. lately, she has been tired, and her body aches. if she is overtraining, which training principle should kristina consider before continuing her program? a. overload b. recovery c. transfer d. variation

b recovery

Nuclear power plant should have monitoring units and water purifiers units, so thet they followed propress in the plant.

Nuclear power plant is a structure that allows the generation of energy from the fission of toxic materials. It is usually due to the risk of accidents. Nuclear energy is very important for the generation of electricity in many countries.

Hence, water purifiers units should be used in the downstream to measure to protect river should be taken.

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Answer:

temperature and radiation levels

Explanation:

edge

Answer:

.439 Hz

Explanation:

Wavelength = 6.6 m

speed = 2.9 m/s

  2.9 = 6.6 f

f = 2.9/6.6 =  .439 Hz

Answer:

atmospheric

Explanation:

I think it’s atmospheric if I, wrong please tell me and I will fix it thanks!

Answer:

Active energy is a characteristic of Kinetic energy

The horizontal component of the velocity with which Ronnie kicks a playground ball is 12.3 m/s.

The horizontal component of the velocity with which Ronnie kicks a playground ball is calculated as follows;

Vx = Vcosθ

where;

Vx = 16 x cos(40)

Vx = 12.3 m/s

Thus, the horizontal component of the velocity with which Ronnie kicks a playground ball is 12.3 m/s.

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Answer:

D) 12.3

Explanation:

took the test

Answer:

Other benefits include:

Regular physical activity is one of the most important things you can do for your health. Being physically active can improve your brain health, help manage weight, reduce the risk of disease, strengthen bones and muscles, and improve your ability to do everyday activities.

Adults who sit less and do any amount of moderate-to-vigorous physical activity gain some health benefits. Only a few lifestyle choices have as large an impact on your health as physical activity.

Everyone can experience the health benefits of physical activity – age, abilities, ethnicity, shape, or size do not matter.

The acceleration of the truck is 45.5 m/s² and the velocity of the truck is 27.8 m/s.

The acceleration of the truck is calculated as follows;

F = ma

a = F/m

a = (2.685 x 10⁵)/(5900)

a = 45.5 m/s²

a = v²/r

v² = ar

v² = 45.5 x 17

v² = 773.64

v = 27.8 m/s

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The half-life of the pennies in experiment 1 and 2 will be the time it takes for half the pennies to fall off after shaking.

Half-Life is the time required for half the amount one a given substance to disappear or decay.

The half-lives of substances are usually constant values.

For example, the Half-Life of radioactive carbon-14 is 5700 years.

Therefore, the half-life of the pennies in experiment one and two will be the time it takes for half the pennies to fall off after shaking.

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Answer:

E = V Q        voltage * charge

Since the charge on an electron is      e = 1.6E-19    coulombs

the energy of 1 eV is 1.6E-19 joules

E = 2.88E-18 joules / 1.6E-19 joules/electron volt

E = 18 eV

The value of x in the given right triangle in a semicircle is determined as 21.

The triangle in a semicircle is always a right angle triangle.

From the figure shown, we can say that the triangle  G J K is right triangle and m<K = 90degrees.

Given that m<K = 4x + 6, we will can use the following equation to find the value of x as shown:

4x + 6 = 90

4x = 90 - 6

4x = 84

x = 21

Thus, the value of x in the given right triangle in a semicircle is determined as 21.

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Answer:

For a photocopier to work, a field of positive charges must be generated on the surface of both the drum and the copy paper. These tasks are accomplished by the corona wires. These wires are subjected to a high voltage, which they subsequently transfer to the drum and paper in the form of static electricity.

If temperature is constant, the volume of a gas varies inversely as its pressure. The constant of proportionality for this variation is 3750.

Temperature is the degree of hotness or coldness of the object.

According to the ideal gas law, pV =nRT

where, p=pressure of gas, V =volume of gas, n=number of moles of element of gas, R=Universal Gas constant and T =temperature

When the temperature is constant,

PV =constant =k

k = 150x 25

k = 3750

Thus , the constant of proportionality is 3750.

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Answer:The electric field and magnetic field of an electromagnetic wave are perpendicular (at right angles) to each other. They are also perpendicular to the direction of the EM wave. EM waves travel with a constant velocity of 3.00 x 108 ms-1 in vacuum.

Explanation:

The 2.7 x 10^17 J of energy is produced when 3.0 kg mass disappears.

According to Einstein's equation, the energy produced when mass is converted to energy is proportional to the mass of the substance.

The Einstein equation is given as:

[tex]E = mc^{2}[/tex]

Mass = 3 kg

c = 3.0 × 10^8

[tex]E = 3 × (3.0 × 10^{8})^{2} = 2.7 \times 10^{17}[/tex]

Therefore, 2.7 x 10^17 J of energy is produced when 3.0 kg mass disappears.

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Answer:

It is a circuit that is easily damaged

120 min = 2 hours

95 x 2 : 1000 =0.19 kwh

8¢ x 0.19 kwh = 1.52¢

The cost of running the 95 W TV for 120 minutes if charged at 8 ¢ per kWhr is 1.52 ¢

E = Pt

E = 0.095 × 2

E = 0.19 KWhr

Cost = Energy × Cost per KWhr

Cost = 0.19 × 8

Cost = 1.52 ¢

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Examples of analog signals are Human voice, Thermometer, Analog phones etc.

Signal is defined as an electromagnetic wave that carries information through a medium. In this, the data is converted into electromagnetic signal which may be analog or digital and then sent from sender to receiver.

Signal which are continuous as time varies are analog signals.

Thus, examples of analog signals are Human voice, Thermometer, Analog phones etc.

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Answer:

Examples of analog signals are Human voice, Thermometer, Analog phones etc. Examples of digital signals are Computers, Digital Phones, Digital pens, etc.

The statements which describe some of the original ideas proposed about the universe during the big bang include:

This is the theory about the formation of the universe which states that a single point began to expand which resulted in its formation.

This was as a result of observations and ideas which can be seen mentioned above.

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Answer:

B. The universe was opaque.

D. The universe was very hot and dense.

E. The universe expanded from a single point.

Explanation:

Answer:

B. Negative acceleration means this car is slowing down.

Explanation:

for the other screenshot

Average acceleration = change in velocity /change in time.

[a = ∆V/∆t] —this the formula.

NOTE:

u = initial velocity (velocity it started with)

v = final velocity (velocity it ended with)

t = time {the time you were given)

a = acceleration.

listing out our givens:

u =o —(the unit is m/s)

v = 40 —(the unit is also m/s)

t = 0.08 —(the unit is s) "s" means second(s).

Soo

a = 40-0 / 0.08 = 500 m/s² ( unit for velocity is m/s²)

( Remember when using the formula we subtract the initial from the final velocity.........I mean we remove the initial from final) if not you will get a negative answer or wrong answer).

also note: final velocity is always bigger in value than initial velocity EXCEPT it is in deceleration meaning for example a car that was speeding is gradually stopping then initial (the one it started with) will be bigger than the one it ended with (because as it gradually stops the speed reduces).

VELOCITY is speed in a specified direction.

you're super free to ask any questions

Good luck ✅.