an object of mass 20kg is lifted to a 25m building. how much potential energy is stored on a mass?(take g=10m/s²)​

Answer:

Increases.

Explanation:

The electric potential increases when the two positive charges of same magnitude bring close to one charge to another because there is repulsive force between them due to same charge and when the two opposite charges move away from each other, the potential energy decreases. When two opposite charges are brought closer together, electric potential energy decreases while on the other hand, when we move opposite charges apart from each other than the work done against the attractive force that leads to an increase in electric potential energy.

Answer:

A

Explanation:

Answer:

please give me brainlist and follow

Explanation:

Yes if the body is travelling with uniform speed in a circular track its speed remains the same but the velocity is non-uniform as the direction of the body is changing every time.

Answer:

so its the first option

Explanation:

Concave lenses create only virtual images. After the rays are refracted, they never converge and so there will be no real images. All concave lens images will be upright, virtual, and diminished, and can be found between the F and the lens

Answer: The correct answer is;

Virtual

Upright

Diminished

Explanation: Hope this answers your question :)

Answer:

use the mole concept

Explanation:

the mole to mole ratio

Answer:i think its 7.5

Explanation:

Answer:

Force has a direct relationship to mass and acceleration. Newton's Second Law, force equals mass times acceleration (F=MA), illustrates their general relationship in an equation.

Explanation:

Relationships to remember:

(Ex: The harder you push a box, the faster it will move)

(Ex: If you add more furniture in the back of a moving company truck, the truck will move slower than it did before the furniture was added)

(Ex: You will need to exert less force to lift a 5-pound weight than a 10-pound weight)

And of course, Newton's Second Law, F=MA sums all of this up in 3 letters and a symbol! If you have any more questions about this problem, please comment on my answer :)

Answer:

Explanation:

when heat is trapped it is conducted to the trapped area and gradually heats up its surrounding

Answer:

27 cm3

Explanation:

Complete question:

A volume V= 2.48 L of an ideal nitrogen gas (N2) are at temperature T= 0.964°C and pressure p = 1.49 atm. Find the number of moles of the gas.

Answer:

The number of mole of the gas is 0.164 mol.

Explanation:

Given;

volume of the ideal gas, V = 2.48 L

temperature of the gas, T = 0.964 °C = 273K + 0.964 = 273.964 K

pressure of the gas, P = 1.49 atm

The number of moles of the gas is calculated by using ideal gas equation;

PV = nRT

where;

n is the number of moles of the gas

R is ideal gas constant = 0.082057 L.atm/mol.K

[tex]n = \frac{PV}{RT} \\\\n = \frac{1.49 \ atm \ \times \ 2.48 \ L}{0.082057 \ L.atm/mol.K \ \ \times \ 273.964 \ K} \\\\n = 0.164 \ mol[/tex]

Therefore, the number of mole of the gas is 0.164 mol.

Answer:

The average speed can be calculated as the quotient between the distance travelled and the time needed to travel that distance.

To go to the school, he travels 2.4 km in 0.6 hours, then here the average speed is:

s = (2.4km)/(0.6 hours) = 4 km/h

To return to his home, he travels 2.4km again, this time in only 0.4 hours, then here the average speed is:

s' = (2.4 km)/(0.4 hours) = 6 km/h.

Now, if we want the total average speed (of going and returning) we have that the total distance traveled is two times the distance between his home and school, and the total time is 0.6 hours plus 0.4 hours, then the average speed is:

S = (2*2.4 km)/(0.6 hours + 0.4 hours)

S = (4.8km)/(1 h) = 4.8 km/h

Answer:

.80

Explanation:

The period of the dripping faucet is 0.8 seconds per drip cycle.

The rate is a measure of how much something changes over time and is typically expressed as a ratio of two quantities with different units of measurement.

Here,
The period of a dripping faucet is the time it takes for one complete drip cycle. To find the period, we need to divide the total time by the number of drip cycles.

In this case, the faucet drips 150 times in 120 seconds, so the time for one drip cycle is,

120 seconds / 150 drips = 0.8 seconds/drip

Therefore, the period of the dripping faucet is 0.8 seconds per drip cycle.

Learn more about the rate here:

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Answer:

c) 100,000 m/s

Explanation:

You need to take the same wave length from the top graph and bottom one, so let's take half a wave length then in the top one that is 0.005, but in the bottom one it's 2000/4 = 500 because they are smaller and there are 4 half waves before you get to 2000, whereas in the top one there is 1 half wave before you get to 0.005 on the graph.

Now use speed = distance / time

speed = 500 / 0.005 = 100 000 m/s

Explanation:

This exposes the individual to danger. Remember, the Newton Law of motion which says that an object under the state of rest will remain in that state (inertia) unless when acted upon by an external force.

In this scenario, standing at the back of the pickup truck presents danger especially if the truck suddenly stops; this individual would experience an upward thrust due to inertia that may disbalance him.

Answer:

Option B

Explanation:

Answer: Chairs, Plants, Food, electronics, etc.

Explanation:

Answer:

The correct answer is "[tex]12\times 10^{-6} \ C[/tex]".

Explanation:

Given that,

[tex]Q1=+4.0\times 10^{-6} \ C[/tex]

and,

[tex]Q2=+2.0\times 10^{-5} \ C[/tex]

or,

     [tex]=20\times 10^{-6} \ C[/tex]

then,

The total charge will be:

⇒ [tex]Q =Q1+Q2[/tex]

       [tex]=(+4.0\times 10^{-6}) +(20\times 10^{-6})[/tex]

       [tex]=24.0\times 10^{-6} \ C[/tex]

hence,

After separation, the charge on each sphere will be:

⇒ [tex]q=\frac{Q}{2}[/tex]

       [tex]=\frac{24.0\times 10^{-6}}{2}[/tex]

       [tex]=12\times 10^{-6} \ C[/tex]

Answer:

the difference is that the carrier waves are altered. am waves amplitude (strength) is varied in the signal to get sound information. Fm waves frequency’s are varied based on the carrier signal.

Explanation:

Answer:

T = 2.28 s

Explanation:

Given that,

The radius of the wheel, r = 0.4 m

The tangential velocity of the wheel, v = 1.1 m/s

We need to find the period of the ball as it travels around the wheel. Let it is T. We know that, the tangential speed is given by :

[tex]v=\dfrac{2\pi r}{T}\\\\T=\dfrac{2\pi r}{v}\\\\T=\dfrac{2\pi \times 0.4}{1.1}\\\\T=2.28\ s[/tex]

So, the period of the ball is equal to 2.28 s.

The wasted energy in processing food is "lost" to heat energy .

The form of energy which is transferred between objects having different temperature is called heat energy.

Thus, we can conclude that heat energy is wasted in the food processing .

Learn more about heat energy here:

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Answer:

Parte A

2000 J

Parte B

400 N

Parte C

900 N

Explanation:

Los parámetros dados son;

La fuerza horizontal con la que la persona arrastra los muebles = 400 N

El peso de los muebles = 900 N

La distancia que se mueve el mueble en el piso = 5 m

El tipo de movimiento del mueble = M.R.U. Movimiento de línea uniforme

Por lo tanto;

Parte A

Trabajo realizado = Fuerza × Dirección de movimiento de la fuerza

Por lo tanto;

Trabajo realizado en, W = 400 N × 5 m = 2000 J

Parte B

La fuerza horizontal aplicada para arrastrar el mueble = 400 N = La fuerza de fricción que actúa sobre el mueble

La fuerza de fricción que actúa sobre el mueble = 400 N

Parte C

El peso de los muebles se toma como dado 900 N.

Answer:

The Refractive index of water is 1.3 and the refractive index of glass is 1.5.

[tex] \huge\longrightarrow{ \mathfrak{ \underline{ Answer }}}[/tex]

The Sunlight is actually white in colour, but it's a mixture of seven different coloured lights of different wavelengths, and when sunlight is passed through a prism, it splits into its constituent units forming a spectrum when observed on a screen. And this shows that the Sunlight is composed of seven different coloured lights .

____________________________

They are :

____________________________

[tex]\mathrm{ \#TeeNForeveR}[/tex]

Answer:

the voltage across each resistor is one third of the battery voltage

Explanation:

In a series circuit, the current is constant throughout the circuit, so the battery voltage is equal to the sum of the voltage drop in each part of the series circuit.

        V = i (R₁ + R₂ + R₃)

in the exercise indicate that all resistance has the same value

         R₀ = R₁ = R₂ = R₃

        V = i 3 R₀

        V = 3 V₀

         V₀ = i R₀

          V₀= V / 3

the voltage across each resistor is one third of the battery voltage

Answer:

Explanation:

kinetic energy=1/2*mass*velocity^2

=1/2*14kg*10^2

=7*100

=700 joule

Answer:

Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes. A human example is cystic fibrosis. A mutation in a single gene causes the body to produce thick, sticky mucus that clogs the lungs and blocks ducts in digestive organs.

Explanation:

Answer: [tex]18.798\times 10^5\ J[/tex]

Explanation:

Given

Mass of snow is [tex]m=3\ kg[/tex]

First snow is converted to water at [tex]0^{\circ}C[/tex] and then it is taken to [tex]70^{\circ}C[/tex]

Heat required to convert the ice into water at [tex]0^{\circ}C[/tex]

[tex]Q_1=3\times 3.34\times 10^5\\Q_1=10.02\times 10^5\ J[/tex]

Heat required to raise temperature from [tex]0^{\circ}C[/tex] to [tex]70^{\circ}C[/tex]

[tex]Q_2=3\times 4180\times (70-0)\\Q_2=8.778\times 10^5\ J[/tex]

Total heat required

[tex]\Rightarrow Q=Q_1+Q_2\\\Rightarrow Q=10.02\times 10^5+8.778\times 10^5\\\Rightarrow Q=18.798\times 10^5\ J[/tex]

Answer:

Properties of an Electric Field

Field lines never intersect each other. They are perpendicular to the surface charge. The field is strong when the lines are close together, and it is weak when the field lines move apart from each other. The number of field lines is directly proportional to the magnitude of the charge.

Explanation:

Answer:

The enemy can use his vision across a broadband of the electromagnetic spectrum . Our century has seen the entire electromagnetic spectrum opened for business.

Explanation: