John heats 1 kg of soup from 25 °C to 70 °C for 15 minutes by a heater. How long does the same heater take to heat 1.5 kg of the same kind of soup from 20 °C to 80 °C? The energy output per unit time by the heater is constant.

Heat emitted from a candle, Microwaves from a microwave oven, Radio waves transmitted between towers, Sound waves from a car radio.

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Answer:

Explanation:

The force engine exert on the car can be found by using the formula

\(f = \frac{w}{d} \\ \)

w is the workdone

d is the distance

From the question we have

\(f = \frac{520}{260} = 2 \\ \)

We have the final answer as

Hope this helps you

Answer:

The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

Explanation:

Answer:

equator

Explanation:

in south & north pole you could have 20+ hours daylight or night, everyday!

Answer:

pictures please

Explanation:

I need a picture so I can tell you

Answer:

14. scolded

15. supporter

16. i am not sure but I think it is removes

17. comfortable

18. outdated

19. drink

20. it can be fantastic or wealthy

Answer:

14. Reicon's parents admonished him for breaking their antique collection,

15. I am an advocate of anti-corruption movement in the country.

16. The hotel abolishes its rice-all-you-can policy to avoid wastage of food.

17. The country has a very tropical climate where it only has dry and wet

seasons similar to other countries in Southeast Asia

18. The obsolete books and other references in the library resulted to the

removal in the shelves and inventory.

19. Beverages, such as juices, milk, beers and sodas, have increased in,due to low supply and importation issues.

20. The luxurious life of my cousin in an exclusive subdivision in Ta makes me inspired to dream and work hard for me to escape this unp.

We have that it takes the ball \(t=0.553sec\) to take to hit the ground

\(t=0.553sec\)

From the Question we are told that

Initial height \(s=1.5m\)

Generally the equation for Time  is mathematically given as

\(S=ut+1/2at^2\\\\1.5=0.5*9.8\)

\(t=0.553sec\)

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The paper ball will hit the ground from 1.5 m at 0.55 s.

Here we can use the free fall kinematics equations. Let's see that the paper ball falls from the rest, so the initial velocity will be 0.

\(y=y_{i}+v_{i}t-0.5gt^{2}\)

Here:

Now, the initial height will be 1.5 m, putting our reference system zero in the ball. So, the final height will be 0 m, because it hits the ground.

\(0=1.5-0.5(9.81)t^{2}\)

Therefore, we just need to solve it for t.

\(t=\sqrt{\frac{3}{9.81}}\)

\(t=0.55\: s\)

The ball will hit the ground at 0.55 s.

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Answer:

A: An object has potential energy (stored energy) when it is not in motion. Once a force has been applied or it begins to move the potential energy changes to kinetic energy (energy of motion).

Explanation:

The total resistance of the circuit is 49 Ω. The current strength in the circuit, when connected to a voltage source of 56 V, is approximately 1.14 A.

To calculate the total resistance of the circuit, we need to determine the equivalent resistance of the resistors connected in a series.

Given:

R1 = 4 Ω

R2 = 30 Ω

R3 = 10 Ω

R4 = 5 Ω

Calculate the equivalent resistance (RT) of R1 and R2, as they are connected in series:

RT1-2 = R1 + R2

RT1-2 = 4 Ω + 30 Ω

RT1-2 = 34 Ω

Calculate the equivalent resistance (RTotal) of RT1-2 and R3, as they are connected in parallel:

1/RTotal = 1/RT1-2 + 1/R3

1/RTotal = 1/34 Ω + 1/10 Ω

1/RTotal = (10 + 34) / (34 * 10) Ω

1/RTotal = 44 / 340 Ω

1/RTotal ≈ 0.1294 Ω

RTotal ≈ 1 / 0.1294 Ω

RTotal ≈ 7.74 Ω

Calculate the equivalent resistance (RTotalCircuit) of RTotal and R4, as they are connected in series:

RTotalCircuit = RTotal + R4

RTotalCircuit = 7.74 Ω + 5 Ω

RTotalCircuit ≈ 12.74 Ω

Therefore, the total resistance of the circuit is approximately 12.74 Ω.

To determine the current strength (I) when connected to a voltage source of 56 V, we can use Ohm's Law:

I = V / RTotalCircuit

I = 56 V / 12.74 Ω

I ≈ 4.39 A

Therefore, the current strength in the circuit, when connected to a voltage source of 56 V, is approximately 4.39 A (or 1.14 A, considering significant figures).

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The molecules of O2 that are  present in 3.90 L flask at  a temperature of 273 K and a pressure of 1.00 atm is 1.047 x 10^23 molecules  of O2

Step  1:  used the ideal gas equation to calculate the moles of O2

that is Pv=n RT  where;

P(pressure)= 1.00 atm

V(volume) =3.90 L

n(number of moles)=?

R(gas constant) = 0.0821 L.atm/mol.K

T(temperature) = 273 k

by  making n the subject of the formula by  dividing  both side by RT

n= Pv/RT

n=[( 1.00 atm x 3.90 L)  /(0.0821 L.atm/mol.k  x273)]=0.174  moles

Step 2: use the Avogadro's  law constant  to calculate  the number of molecules

that  is  according to Avogadro's law

                          1  mole =  6.02 x10^23  molecules

                            0.174 moles=? molecules

by  cross  multiplication

the number of  molecules

= (0.174  moles x  6.02 x10^23  molecules)/ 1 mole  =1.047 x 10^23 molecules of O2

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The speed of light is 3 × 10⁸ m/s. Light will take a time of 500 seconds to travel a distance of 1.5 × 10¹¹ m.

Speed is a physical quantity used to measure the distance travelled by an object  per unit time. It is usually expressed in the unit m/s. Light is the fastest thing in the universe to be known.

The speed of light is the product of its frequency and wavelength. In general the ratio of the distance covered per time taken.

Speed of light  = 3 × 10⁸ m/s

distance from earth to sun =  1.5 × 10⁸km = 1.5 × 10¹¹ m

Now, the time taken by light to travel this distance is :

time = distance/speed.

t =  1.5 × 10¹¹ m / 3 × 10⁸ m/s = 500 seconds.

Therefore, the time taken by light from sun to reach earth surface is approximately 500 s.

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Answer:

The angular width is "\(1.575\times 10^{-3} \ rad\)" and the linear width is "\(2.835\times 10^{-3} \ m\)".

Explanation:

Given:

Wavelength,

\(\lambda = 630 \ nm\)

or,

  \(=630\times 10^{-9} \ m\)

Slit width,

\(a = 0.8 \ mm\)

or,

  \(=0.8\times 10^{-3} \ m\)

Distance between slit and screen,

\(D = 1.8 \ m\)

As we know,

The central bright fringe's angular height,

⇒ \(\theta = \frac{2 \lambda}{a}\)

       \(= \frac{2\times 630\times 10^{-9}}{0.8\times 10^{-3}}\)

       \(=1.575\times 10^{-3} \ rad\)

and,

The linear width will be:

⇒ \(x_o=\frac{2D \lambda}{a}\)

By substituting the values, we get

        \(=\frac{3\times 1.8\times 630\times 10^{-9}}{0.8\times 10^{-3}}\)

        \(=2.835\times 10^{-3} \ m\)

180° or π Radians is the smallest phase difference possible When two coherent waves combine destructively to create a minimum

Two waves of the same wavelength that are entirely out of phase with one another might cancel one another out or interact negatively. When there is a 180 degree or larger radian phase difference, this happens. Only when the two waves have the same amplitude do they completely cancel out. Partially destructive superposition occurs when two waves that are entirely out of phase yet have different amplitudes. The intensity is 0.

Superposition is the phenomenon in which the combined displacement of two combining waves is equal to their vector sum.

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Then the magnitude of the electric field at the origin is:

|E| = √(4* (9.0*10^9 q)^2) = 1.8 * 10^9 q N/C

The magnitude of the electric field at the origin is directly proportional to the charge q.

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1.

The gravitational potential energy depends on the height of the location of an object from the earth's surface. The important quantity is the position of an object.

The gravitational potential energy is calculated from the expression given as:

Here mass is taken as m, the acceleration due to gravity is taken as g, and the position of an object is taken as h.

2.

The kinetic energy mainly depends on the velocity of an object. The kinetic energy is calculated from the expression given as follows:

3.

The potential energy is maximum at the top of the hill, and minimum at the bottom while the kinetic energy starts increasing as the object descends down the hill. The potential energy is converted into kinetic energy.

This conversion from one form of energy to another form is due to the conservation of energy. From the energy conservation principle, the summation of the kinetic energy and potential energy remains constant.

4.

In the real world, a roller coaster loses some of its energy to the environment. The heat energy is lost to the environment.

It is due to the friction present between the roller and surface that is responsible for the generation of heat, which is lost to the environment.

The specific heat capacity of a piece of wood if 1500.0 g of the wood absorbs 67,500 joules of heat, and it’s temperature changes from 32C to 57C is 1.8 J/gºC.

The given data to find specific heat capacity is,

Mass (M) = 1500 g

Heat (Q) absorbed = 67500 J

Initial temperature (T₁) = 32 °C

Final temperature (T₂) = 57 °C

Specific heat capacity (C) =?

The specific heat capacity is described as the quantity of warmth (J) absorbed per unit mass (kg) of the material while its temperature will increase 1 okay (or 1 °C), and its gadgets are J/(kg ok) or J/(kg °C).

At first, we shall determine the change in temperature of the wood. This can be obtained as follow:

Initial temperature (T₁) = 32 °C

Final temperature (T₂) = 57 °C

Change in temperature (ΔT) =.?

ΔT = T₂ – T₁

ΔT = 57 – 32

ΔT = 25 °C

Finally, we shall determine the heat capacity of the wood. This can be obtained as follow:

Mass (M) = 1500 g

Heat (Q) absorbed = 67500 J

Change in temperature (ΔT) = 25 °C

Specific heat capacity (C) =?

Q = MCΔT

67500 = 1500 × C × 25

67500 = 37500 × C

Divide both side by 37500

C = 67500 / 37500

C = 1.8 J/gºC

Thus, the heat capacity of the wood is 1.8 J/gºC.

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Answer:

F=w=ma                                                                                                                                                       OR by using equations of motions                                                                               vf=vi-at                    : a=vf-vi/t                                                              eq 1                         s=vit+1/2at squre                                                                                 eq 2                     2as=vf squre - vi squre                                                                        eq 3                                                                                                                                                                                  

Explanation:

where m is the mass of falling body , f is the weight is the force acting down ward , vf is the final velocity, vi is the inetial velocity , t is the time and s is the distance covered by a body.

The correct answer is option "OD. You would weigh less on planet A because it has less mass than planet B."

Weight is the force of gravity acting on an object, and it depends on the mass of the object and the mass of the planet it is on. The gravitational force is directly proportional to the mass of the planet. Therefore, if planet A has less mass than planet B, the gravitational force on planet A would be weaker than on planet B.

Weight is not determined by the size of the planet but rather by its mass. Even if two planets have the same size, their masses can be different. So, statement OA is incorrect.

Similarly, your mass does not change when you move to a different planet. Mass is a measure of the amount of matter in an object and remains constant regardless of the location. Therefore, statement OB is incorrect.

Since planet A has less mass, the gravitational force acting on you would be weaker compared to planet B. This results in you weighing less on planet A. Thus, statement OD is the correct explanation for the weight difference between the two planets.

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Draw lines from each point of the area of convergence to the point of convergence and extend them until they intersect.

To draw the lines of convergence and the area of convergence, first draw the line that divides the area into two parts. Then draw the lines that connect the points where the opposing forces meet. Finally, draw a circle around the area of convergence, with the convergence lines drawn from its center to the edges.

Convergence lines:

1. The line that divides the area of convergence into two parts.

2. The line that connects the points where opposing forces meet.

Area of convergence:

The area of convergence is the area where the opposing forces meet and interact. This area can be visualized as a circle, with the convergence lines drawn from its center to the edges. The area of convergence is often characterized by a high level of activity, with the opposing forces keeping each other in check.

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Answer:

Explanation:

Sure, I'd be happy to help you with the question!

Let's denote the input as x. According to the function machine, the input is multiplied by 6 and then 80 is subtracted from the result to obtain the output.

So, the function can be written as:

Output = (6 * x) - 80

Now, the problem states that the input is the same as the output. Therefore, we can set up the equation:

x = (6 * x) - 80

Let's solve this equation to find the value of x:

x = 6x - 80

Subtracting 6x from both sides, we get:

x - 6x = -80

Combining like terms, we have:

-5x = -80

Dividing both sides by -5, we find:

x = (-80) / (-5)

Simplifying the expression, we have:

x = 16

Therefore, the input (x) that results in the input being the same as the output is 16.

To work out these types of questions, it's important to carefully read the instructions and understand the operations being performed in the function machine. Then, you can set up an equation with the input and output, and solve for the unknown value. Always double-check your solution to ensure it satisfies the given conditions of the problem.

Answer:

16

Explanation:

(x*6) - 80 = x

Multiply the parentheses

6x - 80 = x
Add 80 to each side to get
6x = x + 80
Subtract x from both sides to get
5x = 80
Divide both sides by 5
x = 16

Answer:

7000 meters

Explanation:

obviously 99.99 is less than 7000

10 cubed is 10 × 10 × 10, 1000, × 4.5 is 4500, which is less than 7000

10 squared is 100, which × 9 is only 900, which is also less than 7000

have a good day

Answer: the last one

Explanation: it pushes the lid off in a upward motion

Answer:

the last one

Explanation:

Can you mark me as BRAINLLIEST, PLEASE!!!!!!!!!!!!

(○’ω’○)          (ToT)  ↖(^ω^)↗  -_-z  ◑﹏◐  囧    ^O^  B-)

Answer:

amplitude

Explanation:

amplitude because that is what makes loud and soft sounds

Answer:

It remains the same

Explanation:

It remains the same. This is because the number of protons doesn't change and the number of protons determines the atomic number.

when water in a metal pot is heated over a campfire. Primarily, by means of convection energy transfer is thermal energy moved from the fire to the bottom of the pot

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

Thermal energy can flow by different means such as conduction, convection, and radiation.

As given in the problem when water in a metal pot is heated over a campfire. The energy we receive around the campfire is mostly due to the effect of the radiation of the heat but the Primary means of energy transfer is thermal energy moved from the fire to the bottom of the pot because of the convection.

Thus, when water is heated in a metal pot over a campfire. Thermal energy is primarily transferred from the fire to the bottom of the pot through convection.

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Answer:

the weight of the object decreases when it is taken from the Earth to the Moon

Explanation:

The weight of an object is defined as the product of the mass of the object with the acceleration due to gravity of the Planet.

\(W =mg\)

where,

W = weight of the object

m = mass of the object

g = acceleration due to gravity on the planet

The mass of an object remains constant everywhere in the universe. Therefore, the weight is directly proportional to the value of acceleration due to gravity.

The value of acceleration due to gravity on the Moon is lesser than its value on the Earth.

Hence, the weight of the object decreases when it is taken from the Earth to the Moon

A parallel circuit can be modelled by connecting the components parallel.

A parallel circuit is a form of electrical circuit in which the components are linked in parallel to one another, each having a separate channel for current flow and being directly connected to the power source. The circuit must first be schematically represented, with the power supply and each component linked in parallel. Next, the total resistance the total current in the circuit by using Ohm's Law must be calculated.

Additionally, it is necessary to confirm that the total current entering the circuit equals the total current leaving the circuit. In a parallel circuit, the total current passing through all of the components equals the current entering the circuit. The voltage drop between each component must then be once more computed using Ohm's Law.

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Answer: MIS huevos

Explanation:

my sources

Answer:

I may not have the answer so i'll just give up some hints.

Multiply the time by the acceleration due to gravity to find the velocity when the object hits the ground. If it takes 9.9 seconds for the object to hit the ground, its velocity is (1.01 s)*(9.8 m/s^2), or 9.9 m/s. Choose how long the object is falling. In this example, we will use the time of 8 seconds. Calculate the final free fall speed (just before hitting the ground) with the formula v = v₀ + gt = 0 + 9.80665 * 8 = 78.45 m/s . Find the free fall distance using the equation s = (1/2)gt² = 0.5 * 9.80665 * 8² = 313.8 m .h = 0.5 * 9.8 * (1.5)^2 = 11m. b. V = gt = 9.8 * 1.5 = 14.7m/s. A feather and brick dropped together. Air resistance causes the feather to fall more slowly. If a feather and a brick were dropped together in a vacuum—that is, an area from which all air has been removed—they would fall at the same rate, and hit the ground at the same time.When an object's point is taller the thing that is going down it will go faster than when the point is lower. EXAMPLE: The object is the tennis ball if you drop it down the higher hill it will be faster than if you drop it down a shorter hill. In other words, if two objects are the same size but one is heavier, the heavier one has greater density than the lighter object. Therefore, when both objects are dropped from the same height and at the same time, the heavier object should hit the ground before the lighter one.

I hope my little bit (big you may say) hint help you with your question.

The change of distance with respect to time is defined as speed.  Speed is a scalar quantity. The speed of brick while hits the ground is 9.90 m/sec.

The change of distance with respect to time is defined as speed.  Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.

The given data in the problem is

m is the mass of block =2.0 Kg

u is the initial velocity of fall =0 m/sec

h is the distance of fall = 5.0 m

g is the acceleration of free fall =10m/sec²

v is the hitting velocity of brick=?

According to Newton's third equation of motion

\(\rm v^2=u^2+2gh\\\\ \rm v^2=2gh\\\\ \rm v= \sqrt{2gh}\)

\(\rm v= \sqrt{2\times 9.81 \times 5.0} \\\\ \rm v=9.90\;m/sec\)

Hence the speed of the brick while hits the ground is 9.90 m/sec.

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