in both a dry cell and a wet cell battery, what causes the production of an electrical current.
a. chemical reaction

b.a step down substation transformer

c. magnets

d. generators at a power plant

Answer:

Acceleration = Δv/t

Acceleration = (8 m/s - 0 m/s)/ 3 s

Acceleration = 8 m/s / 3s

Acceleration = 2.667 m/s²

Explanation:

Answer:

c 2.67

Explanation:

Answer:

a) the amount of heat absorbed by the water is 431995.2 J

b) the amount of heat absorbed during evaporation is 2712000 J

Explanation:

Given that;

mass of water Mw = 1.2 kg

Specific heat capacity of water Cw = 4186 J/kg.C

Change in temperature ΔT = final T - Initial T = 100 - 14 = 86°C

Now

A)

Heat required to raise the temperature of water is expressed as:

Q = Mw × Cw × ΔT

Q = 1.2 × 4186  × 86

Q = 431995.2 J

Therefore the amount of heat absorbed by the water is 431995.2 J

B)

Then heat absorbed during evaporation will be:

Q1 = Heat absorbed during phase change from water to steam = Mw × Lv

Lv = latent heat of vaporization of water = 2.26 × 10⁶ J/kg

so

Q1 = 1.2 × 2.26 × 10⁶ = 2712000 J

Therefore the amount of heat absorbed during evaporation is 2712000 J

Explanation:

Single slit diffraction

Diffraction is the phenomenon of spreading out of waves as they pass through an aperture or around objects. Diffraction occurs when the size of the aperture or obstacle is of the same order of magnitude as the wavelength of the incident wave. For very small aperture sizes, the vast majority of the wave is blocked. in case of  large apertures the wave passes by or through the obstacle without any significant diffraction.

Answer:

d is answer because w to between 10 to plus 10 more answers d

The equivalent resistance of the circuit20.0 Ω

The equivalent resistance is where the aggregate resistance connected either in parallel or series is calculated. Essentially, the circuit is designed either in Series or Parallel.

In a series circuit, the equivalent resistance is the algebraic sum of the resistances. The current through the circuit can be found from Ohm's law and is equal to the voltage divided by the equivalent resistance.

Resistors are in parallel when one end of all the resistors are connected by a continuous wire of negligible resistance and the other end of all the resistors are also connected to one another through a continuous wire of negligible resistance

The equivalent resistance is 20 OHM

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Answer:

So we can have energy  for electronics. It limits the flow of electric current

Explanation:

It’s in the answer!

Answer:

Basically, the function of a resistor is always to oppose the flow of current through it and the strength of this opposition is termed as its resistance.

Answer:

Using, s=ut+

2

1

at

2

s

1

=u+

2

1

a

or, 3=u+

2

a

∴a=6−2u

s

2

=2u+

2

1

a×4

8=2u+2a

Solving the equations

8=2u+2(6−2u)

8=2u+12−4u

2u=4

u=2m/s

∴a=6−2u=6−4=2m/s

2

Answer:

13.33m/s

Explanation:

The average velocity is the ratio of total distance traveled to the total time taken to complete the distance. The International System of Units (SI) unit of velocity is the meter per second (m/s). The Velocity is given by the equation:

Velocity = total distance traveled / total time taken

The total distance traveled = Distance traveled by horse + distance traveled by truck + remaining distance traveled = 100 m + 500 m + 1000 m = 1600 m

Total time taken = 120 s

Velocity = total distance traveled / total time taken = 1600 m / 120 s = 13.33 m/s

Velocity = 13.33 m/s

Answer:

q(ice) = -q(warm water)

Explanation:

Ice removes energy if ice is put in warm water and ice retains the very same amount of energy. Thus the water temperature heat sign is negative, and the ice heat sign is positive.

Answer:

T large = 3T small

Explanation:

It's just 3 times larger

The correct answer is 600 ampere-turns

We shall first get the expression that provides the magnetomotive force. It is calculated by multiplying the number of spins on the wire by the current flowing through it. To get the solution, we shall alter and substitute the necessary values.

It is crucial to keep in mind that magnetomotive force (mmf), which is similar to electromotive force (emf), drives a current of electrical charge through magnetic circuits. The phrase "magnetomotive force" is deceptive, though, as it neither denotes a force nor something that moves.

M.M.F = NI

N= 50

I = 12 at a current of 1 ampere

M.M.F = NI

= 50 × 12

=600 ampere-turns

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Answer: Lungs

Explanation:

Answer:

ma / cos theta is the answer you are looking for

A box of mass m is pulled by force Fp at an angle along a frictionless surface and the box accelerates to the right with a magnitude of the horizontal acceleration Fpcosθ/m, therefore the correct option is D.

Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact.

The friction force prevents any two surfaces of objects from easily sliding over each other or slipping across one another. It depends upon the force applied to the object.

A box of mass m is pulled by force Fp at an angle along a frictionless surface. The box accelerates to the right

The only horizontal force responsible for the movement of the box is the horizontal component of the force Fp which is Fpcosθ

By using equilibrium of horizontal forces

ΣFh =0

ma= Fpcosθ

a =Fpcosθ/m

The magnitude of the horizontal acceleration is Fpcosθ/m,therefore the correct option is D.

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Answer:

The number of crate to be lifted is 27

Explanation:

Given;

mass of the crates, m = 25 kg

height in which the crate is lifted, h = 1.0 m

power output, P = 110 W

time to complete the task, t = 1 minutes = 60 s

The input energy is equal to the gravitational energy due to height the crate is lifted is given as;

E(input) = mgh

E(input)  = 25 x 9.8 x 1

E(input)  = 245 J

Output energy is given as;

E(output) = P x t

E(output) = 110 x 60

E(output) = 6600 J

Let the number of crate to be lifted = n

n x E(input)  = E(output)

n x 245 = 6600

n = 6600 / 245

n = 27 crates

Answer:

 In space, it is possible to create "artificial gravity" by spinning your spacecraft or space station

Answer:

first one :

the object will stay at the same speed and direction unless it is acted upon by an internal unbalanced force.

Answer:

The size of the force that pushes the wall is 12,250 N.

Explanation:

Given;

mass of the wrecking ball, m = 1500 kg

speed of the wrecking ball, v = 3.5 m/s

distance the ball moved the wall, d = 75 cm = 0.75 m

Apply the principle of work-energy theorem;

Kinetic energy of the wrecking ball = work done by the ball on the wall

¹/₂mv² = F x d

where;

F is the size of the force that pushes the wall

¹/₂mv² = F x d

¹/₂ x 1500 x 3.5² = F x 0.75

9187.5 = 0.75F

F = 9187.5 / 0.75

F = 12,250 N

Therefore, the size of the force that pushes the wall is 12,250 N.

Answer:

Negative acceleration

Explanation:

Let us assume a vehicle is moving with a constant velocity u and then it comes to a sudden stop.

The initial velocity of the vehicle is u and finally it comes to rest, it means final velocity is 0.

As we know that,

Acceleration is equal to change in velocity divided by time taken.

[tex]a=\dfrac{v-u}{t}\\\\\text{Put v=0}\\\\a=\dfrac{-u}{t}[/tex]

We can see that the value of acceleration is negative. Hence, it leads to negative acceleration.

Answer:

Explained below

Explanation:

For a velocity time graph, the y - axis will represent velocity while the x - axis will represent time.

Now, to calculate velocity at a certain time t, we will draw a perpendicular line from the time on the x-axis to the graph line and trace the horizontal line from that point to the y-axis which will give the corresponding velocity at that time.

Now, for the acceleration at a time t. After getting the velocity like explained above, we now divide the velocity by the time.

Answer:

What is the purpose of drawing a motion diagram or a particle model? Reason: In a motion diagram or a particle model, we relate the motion of the object with the background, which indicates that relative to the background, only the object is in motion. A coordinate system is helpful when you are describing motion.

Explanation:

Finding average speed distance

avg = distance/time

time1 – 30 ml + 30 ml

240 s60 m240 s= 0.25m/s

The correct answer is:

• average velocity = 0 m/s

• average speed = 0.25 m/s

The pace at which an object's direction changes as it is traveling is referred to as its velocity and is measured by a particular unit of time and from a particular point of view.

Greta returns to his house after realizing she forgot her tea 30 meters from her pickup. Her journey takes 240 seconds in all.

Avg = distance/time time for calculating average speed distance

1 - 30 ml + 30 ml

240 s60 m

240 s= 0.25m/s

The right response is:

• Average speed: 0 m/s

• The typical speed is 0.25 m/s

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Explanation:

180 million km = 10 min

? = 1 min

180 million x 10 = 1,800,000,000 km

180 million km = 600s

? = l s

108,000,000,000km

Answer:

The value is  [tex]F = 562.7 \ N[/tex]

Explanation:

From the question we are told that

   The diameter is  [tex]d = 10 \ mm = 0.01 \ m[/tex]

    The distance between the poles is  L =  50 m

      The velocity of the wind is  [tex]v = 34 \ m/s[/tex]

Generally the horizontal force the cable puts on each other is mathematically represented as

           [tex]F = \frac{1}{2} * C_D * \rho * v^2 * A[/tex]

Here A is the area of the rope(i.e assuming the rope to be a cylinder ) which is mathematically represented as

      [tex]A = L * d[/tex]

=>   [tex]A = 0.01 * 50[/tex]

=>   [tex]A = 0.5[/tex]

Here [tex]C_D[/tex] is the coefficient of discharge of the rope and the value is  [tex]C_D = 1.5[/tex]

         [tex]\rho[/tex] is the density of air with value   [tex]\rho = 1.225 \ kg/m^3[/tex]

 So

    [tex]F = \frac{1}{2} * C_D * \rho * v^2 * A[/tex]

=>  [tex]F = \frac{1}{2} * 1.5 * 1.225 * 34^2 * 0.5[/tex]

=>   [tex]F = 562.7 \ N[/tex]

The correct answer is 9.11 g m/s^2

Height from which a cat drops, h = 3.6 ft = 3.6 x 0.305 m = 1.098 m

Distance travelled to stop the cat, s = 12 cm = 0.12 m

Using the equation, v^2 = u^2 + 2as,

v^2 = 0 + 2gh = 2 x 9.8 x 1.098 = 21.52

v = 4.63 m/s

Speed of the cat when it the floor, v = 4.63 m/s

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Explanation:

When the sun shines onto a solar panel, energy from the sunlight is absorbed by the PV cells in the panel. This energy creates electrical charges that move in response to an internal electrical field in the cell, causing electricity to flow.

Answer:

11.27N

Explanation:

Given parameters:

Mass of the book  = 1.15kg

Unknown:

Magnitude of the normal force  = ?

Solution:

The normal force is the vertical force exerted by a body on an object.

It can be described as the weight of an object.

 Normal force  = mass x acceleration due to gravity

 Normal force  = 1.15 x 9.8  = 11.27N

Answer:

2 output energy 3 not you full energy