if rechargeable cell is being charged from a source of EMF the EMF of cell during charging is
A. always equal to its terminal potential difference
B. always greater than its terminal potential difference
C. always less than its terminal potential difference​
D. either equal or less than its terminal potential difference

Explanation:

v = u + at

24 = 10 + a * 7

24 = 10 * 7 a

a = 24 - 10/7

a = 14/7

a = 2m/sec^2

hope it helps you

Answer:

First calculate change in velocity:

final velocity = 20 m/s.

initial velocity = 30 m/s.

change in velocity = (20 - 30) = -10 m/s.

acceleration = -10 ÷ 25.

acceleration = -0.4 m/s 2

The acceleration value is negative here because the car is slowing down or decelerating.

Explanation:

Troposphere, stratosphere, mesosphere, thermosphere and exosphere.

Earth's atmosphere has five major layers.

From lowest to highest, layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.

a) What are the conditions in the troposphere?

The atmospheric temperature descends upward with a slope of ~10 K km−1 for dry air and ~7 K km−1 for wet air in troposphere.

The temperature of troposphere decreases with an increase in height.

B) What sort of temperatures would she experience in the stratosphere? What other layer is found within the stratosphere?

The temperature in the stratosphere ranges from- 60° F at the troposphere boundary to -5°F at the top.

The temperature increase is due to the ozone layer that absorbs ultraviolet light from solar radiation.

C)What sort of temperatures would she experience in the mesosphere?

The temperature in the mesosphere ranges from -2.5°C to -90°C

The temperature decreases because of a decrease in the absorption of penetrating solar radiation.

The atmosphere gets cooler with an increase in altitude because an increase in distance from the Earth's surface.

D)What sort of temperatures would she experience in the thermosphere? What other layer is found within the thermosphere?

4,500°F is the temperature of thermosphere.

Temperatures climb sharply in the lower thermosphere , then level off and hold fairly steady with increasing altitude above that height.

Temperatures in the upper thermosphere can range from about 500° C (932° F) to 2,000° C (3,632° F) or higher.

Learn more about layers of atmosphere here:

https://brainly.com/question/25881294

#SPJ1

According to conservation of energy, the energy of interacting bodies in a closed system remains constant. The total energy of an isolated system remains constant; it is said to be conserved over a period of time.

Elastic energy is the mechanical implicit energy stored in the configuration of a material or physical system as it's subjected to elastic distortion by work performed upon it. Elastic energy occurs when objects are impermanently compressed, stretched or generally misshaped in any manner.

The mechanical energy is never lost forever , rather it gets converted to thermal energy because of the friction .

To know more about Law of conservation of energy ,visit:

https://brainly.com/question/29775341

#SPJ1

By using the Kohler curves is 4×\(10^{-5} cm\). If Rh is not shown in the graph therefore the sensitivity is near 1.00 S Rh is 88%. That is 0.0055 means 0.55%.

Kohler curves, also known as Kohler plots, are a graphical representation of the magnetoresistance of a material as a function of the magnetic field strength. They were first introduced by Walter Kohler in 1934 to describe the behavior of ferromagnetic materials. Kohler curves are useful in the study of magnetic materials and have applications in the development of magnetic sensors and memory devices.

Kohler curves plot the ratio of the resistance of a material at a given magnetic field strength to its resistance in the absence of a magnetic field, versus the square of the magnetization of the material. The resulting curve can be used to determine the degree of spin polarization in the material, which is a measure of the alignment of electron spins in the material with the magnetic field.

To know more about Kohler visit here:

brainly.com/question/28305563

#SPJ4

Complete Question:

Using the Kohler curves estimate the following: (a) the radius of the droplet that will form on a sodium chloride particle of mass 10^-18 kg in air that is 0. 1% supersaturated; (b) the relative humidity of the air adjacent to a droplet of radius 0. 4 microns that contains 10^-19 kg of dissolved ammonium sulfate; (c) the critical supersaturation required for an ammonium sulfate particle of mass 10^-19 kg to grow beyond the haze state

Answer:

the answer is main sequence star

(a) When the current flows horizontally toward the east, the magnitude of the magnetic force is approximately 9078 N, and the direction is upward at 90° from the horizontal. (b) When the current flows horizontally toward the south, the magnitude of the magnetic force is 0 N, and there is no specific direction associated with it.

To find the direction and magnitude of the magnetic force exerted on the wire, we can use the equation:

F = |B| * I * L * sin(θ)

where:

F is the magnetic force,

|B| is the magnitude of the magnetic field,

I is the current,

L is the length of the wire, and

θ is the angle between the current and the magnetic field.

Given:

Current, I = 110 A

Magnitude of the magnetic field, |B| = 0.39 G

Length of the wire, L = 210 m

(a) When the current flows horizontally toward the east:

θ = 90° (since the wire is perpendicular to the magnetic field)

Plugging in the values:

F = (0.39 G) * (110 A) * (210 m) * sin(90°)

F = (0.39 G) * (110 A) * (210 m) * 1

F ≈ 9078 N

The magnitude of the magnetic force is approximately 9078 N.

The direction of the magnetic force is perpendicular to both the current and the magnetic field. Since the wire is horizontal and the magnetic field points north (downward at 72° below horizontal), the magnetic force acts vertically upward.

Therefore, the direction of the magnetic force is upward, and the angle is 90°.

(b) When the current flows horizontally toward the south:

θ = 180° (since the current and the magnetic field are parallel and in opposite directions)

Plugging in the values:

F = (0.39 G) * (110 A) * (210 m) * sin(180°)

F = (0.39 G) * (110 A) * (210 m) * 0

F = 0

The magnitude of the magnetic force is 0 N.

Since the magnetic force is zero, there is no direction associated with it.

Therefore, the magnitude of the magnetic force when the current flows horizontally toward the south is 0 N, and there is no specific direction.

To know more about the magnetic force refer here :

https://brainly.com/question/30532541#

#SPJ11

Hi there!

1)

Since the charge placed in the middle is positive, we know that the particle is being repelled.

The particle experiences a greater repelling force by the 9μC charge. We can use the equation for electric force:
\(F_E = \frac{kq_1q_2}{r^2}\)

k = Coulomb's Constant

q₁, q₂: Charges (C)
r = distance between charges (m)

This is a VECTOR quantity, so we must subtract the forces since they point in opposite directions.

Force from 9μC particle:
\(F_E = \frac{k(.000005)(.000009)}{2^2} = .101\\\\\)

Force from 4μC particle:
\(F_E = \frac{k(0.000005)(0.000004)}{2^2} = 0.0450\)

Subtract:
\(.101 - 0.0450 = \boxed{0.561 N}\)

2)

We can find a position by setting the two equations equal to one another. (Both repelling forces must be EQUAL for the force = 0 N)

Let the distance between the 9μC and 5μC charge equal 'x', and the distance between the 4μC and 5μC charge equal '4 - x'.

\(\frac{k(0.000009)(0.000005)}{x^2} = \frac{k(0.000004)(0.000005)}{(4 - x)^2}\)

Cancel out 'k' and the 5μC value.

\(\frac{0.000009}{x^2} = \frac{0.000004}{(4 - x)^2}\)

Solve for 'x' using a graphing utility.

\(\boxed{x = 2.4 m}\)

Explanation:

Number of nucleons

= no of protons + no of neutrons

= 8 + 8

= 16

Atomic number = no of protons = 8

Atomic mass = 15.999

Gamma rays are given out by the nucleus of certain radioactive materials. Radioactive material ray causes harm to the human beings and environment.

Gamma decay is the production of extremely high-frequency electromagnetic radiation in order to stabilize the unstable nucleus. You must be well-versed in the various energy levels found in an atom.

The Nucleus has its own amount of energy. Gamma decay is the nucleus' method of transitioning from a higher energy level to a lower energy level by emitting high energy photons.

Gamma rays are given out by the nucleus of certain radioactive materials.

Hence, nucleus is the right answer for the blank.

To learn more about the gamma decay, refer to the link;

https://brainly.com/question/25455333

#SPJ2

-266

What is acceleration?

Acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities (in that they have magnitude and direction).

To know more about this follow the link below:

https://brainly.com/question/12337396

#SPJ4

Answer:

It's a golgi body

Explanation:

It controls the transport system of the cell

What goes in and out the cel

The d. experimental method is described as a type of posthumous extirpation.

Posthumous extirpation refers to the removal or extraction of a specific part of an organism's body after death, often for the purpose of scientific research. The experimental method is a systematic approach used by researchers to test hypotheses and draw conclusions about a particular phenomenon. It involves the manipulation of one or more independent variables to determine their effects on dependent variables.

This method allows scientists to gather empirical data, control for confounding factors, and establish causal relationships. By applying the experimental method to posthumous extirpation, researchers can gain valuable insights into the structure and function of various biological systems. This can lead to a better understanding of human and animal anatomy, as well as contribute to advancements in medical treatments and surgical procedures. So therefore  described as a type of posthumous extirpation is d. experimental method.

To learn more about experimental method here:

https://brainly.com/question/14882706

#SPJ11

It is necessary to blank the spectrophotometer whenever the wavelength is changed to eliminate stray light interference and ensure accurate readings.

Spectrophotometers are used in biochemical laboratories to quantify the concentration of specific molecules in a sample. It works by measuring the intensity of light absorbed by the sample at a specific wavelength of light. The purpose of blanking the spectrophotometer is to eliminate any light absorption caused by impurities or other substances in the solvent or sample.

These impurities are referred to as stray light, and they can interfere with the readings of the spectrophotometer. Blank solutions are used to detect the presence of stray light and to correct the instrument to zero absorbance before taking the readings. The blank solution contains the same solvent and reagents used in the sample.

By blanking the spectrophotometer before taking the readings, it ensures that the readings are accurate, and the interference of stray light is eliminated.

Learn more about spectrophotometer here:

https://brainly.com/question/30657765

#SPJ11

Answer:

19 miles away from the home

The average velocity of the horse at the given displacement is 2.07 m/s.

The given parameters:

The average velocity of the horse is determined as the ratio of the total displacement to time of motion.

\(v = \frac{\Delta x}{\Delta t} \\\\v = \frac{x_2 - x_1 }{t} \\\\v = \frac{15 - (-14)}{14} \\\\v = \frac{15 + 14}{14} \\\\v = \frac{29}{14} \\\\v = 2.07 \ m/s\)

Thus, the average velocity of the horse at the given displacement is 2.07 m/s.

Learn more about average velocity here: https://brainly.com/question/6504879

"Constant returns to scale" refers to a situation where an increase in all inputs leads to a proportional increase in output.

In the context of "constant returns to scale," the term "constant" refers to the proportionality between the increase in inputs and the increase in output. If an increase in inputs results in a proportional increase in output, it is referred to as "constant returns to scale.

" This means that the relationship between inputs and outputs remains unchanged, regardless of the size of the inputs. The term "constant" in this context refers to the fact that this relationship is constant and does not change over time.

"Constant returns to scale" describes a situation where an increase in all inputs of a production process leads to a proportional increase in output. In other words, if inputs are doubled, output will also double, maintaining the same average cost per unit of output.

This property is useful in analyzing the behavior of large-scale production processes and determining the optimal level of inputs for maximum efficiency.

To know more about Constant visit:

brainly.com/question/3146357

#SPJ4

To calculate the depth of the sea using the given information, we need to consider the speed of the wave and the time it takes for the wave to travel down to the sea bed and back.

The time taken for the wave to travel down to the sea bed and back is twice the time it takes for the reflected wave to be received. In this case, the reflected wave is received after 0.5 seconds, so the total round trip time is 2 * 0.5 seconds = 1 second.

Now, we need to determine the speed of the wave. The speed of a wave can be calculated using the formula:

\(Speed = \frac{Distance}{Time}\)

In this case, the distance is twice the depth of the sea because the wave travels down to the sea bed and then back up to the surface. Therefore, we have:

\(Speed = \frac{2 \times Depth}{Time}\)

Rearranging the formula to solve for the depth, we get:

\(Depth = \frac{Speed \times Time}{2}\)

Since we are not given the speed of the wave, we cannot calculate the exact depth. The speed of the wave will depend on the properties of the medium through which it is traveling (such as water) and may need to be provided in the question.

Once the speed is known, we can substitute it into the formula along with the given time of 1 second to calculate the depth of the sea. Without the speed value, we cannot determine the exact depth.

To know more about Travel visit-

brainly.com/question/29264897

#SPJ11

Answer:

Temperature is a measure of the average kinetic energy of the particles in an object.

Using the modern celcius system of temperature measurement, We. an easily determine how hot or cold it is. It was also know as Centigrade. This is because it is based on the freezing and boiling points of water with 100 degrees between those temperatures.

The answers to the questions of the object thrown off a cliff with a horizontal speed of 10 m/s and that reach the ground which is 30 m below after 3 seconds, are:

a. We know:

b. We need to find the initial vertical velocity and the total horizontal distance traveled.

c. To calculate the initial vertical velocity and the total horizontal distance traveled by the object, we need to use the following equations:

\( y_{f} = y_{i} + v_{i_{y}}t - \frac{1}{2}gt^{2} \)   (1)

\( v_{i_{x}} = \frac{x}{t} \)  (2)

d. The initial vertical velocity and the horizontal distance traveled by the object are 4.72 m/s and 30 m, respectively.

a. From the statement, we know:

b. We need to find the initial vertical velocity and the total horizontal distance traveled.

c. To calculate the initial vertical velocity we can use the following equation:

\( y_{f} = y_{i} + v_{i_{y}}t - \frac{1}{2}gt^{2} \)   (1)

Where:

\( y_{f}\): is the final height = 0 m  

\( y_{i}\): is the initial height = 30 m  

\( v_{i_{y}}\): is the initial vertical velocity =?  

g: is the acceleration due to gravity = 9.81 m/s²

t: is the time = 3 s  

And, to find the horizontal distance traveled by the object we need to use the equation:

\( v_{i_{x}} = \frac{x}{t} \)   (2)

Where:

\(v_{i_{x}} \): is the initial horizontal velocity = 10 m/s

x: is the horizontal distance =?

d. The solution to this problem is the following.

\( y_{f} = y_{i} + v_{i_{y}}t - \frac{1}{2}gt^{2} \)  

\( 0 = 30 m + v_{i_{y}}*3 s - \frac{1}{2}*9.81 m/s^{2}*(3 s)^{2} \)

Solving for \(v_{i_{y}}\)

\( v_{i_{y}} = \frac{\frac{1}{2}*9.81 m/s^{2}*(3 s)^{2} - 30 m}{3 s} = 4.72 m/s \)

Hence, the initial vertical velocity is 4.72 m/s.  

\( v_{i_{x}} = \frac{x}{t} \)

\( 10 m/s = \frac{x}{3 s} \)

\( x = 10 m/s*3 s = 30 m \)

Therefore, the horizontal distance traveled by the object is 30 m.

Read more here:

I hope it helps you!  

The claim that a hard magnetic material will restore its initial permanent magnetization if heated above its curie temperature and subsequently cooled to room temperature is untrue.

The alignment of a material's magnetic moments is compelled into a disordered state when it reaches its Curie temperature. On the basis of the same concept, a material's magnetic strength gradually decreases when it is subjected to progressively greater temperatures.

If heated over its melting point or for an extended period of time, a magnet will permanently lose its magnetic force at a temperature of about 80 °C.

To know more about magnetic material visit:-

https://brainly.com/question/4030249

#SPJ4

Answer:

The ice will melt and her hand will get cold

Explanation:

What is Electric Field?

-- Electric field, an electric property associated with each point in space when charge is present in any form.

--The magnitude and direction of the electric field are expressed by the value of E, called electric field strength or electric field intensity or simply the electric field..

What is electric force ?

-- The repulsive or attractive interaction between any two charged bodies is called as electric force.

--  Similar to any force, its impact and effects on the given body are described by Newton's laws of motion.

-- The electric force is one of the various forces that act on objects.

Learn more about potential from https://brainly.com/question/49140

#spj4

Answer: 22

Explanation:

The average speed of the family is 2.5 mph.

At the same speed used to walk to school, the distance traveled in one hour is 4.5 miles.

The average speed of an object is the total distance traveled by the object to the total time of motion of the object.

v = total distance / total time motion

total distance = 2.5 miles

total time = 6 pm - 5 pm = 1 hour

v = (2.5 miles) / (1 hour)

v = 2.5 mph

When it takes 20 minutes to walk 1.5 miles, the speed of the motion is calculated as follows;

time = 20 mins / 60 mins/hr =  0.333 hr

v = 1.5 miles / 0.333 hr = 4.5 mph

At this speed, the distance traveled in one hour is calculated as follows;

d = 4.5 mph x 1 hr

d = 4.5 miles

Learn more about average speed here: https://brainly.com/question/4931057

#SPJ1

Answer:  

Explanation:

at first the rock is at rest so initial velocity is zero
after accelerating it reaches a final velocity
we are supposed to find that final velocity


\(v^{2} = u^{2} +2ax\)
v= final velocity
u= initial velocity
x= distance
a= acceleration

\(v^{2} = 0^{2} + 2(9.8)(14.4)\)
\(v^{2} = 282.24\)
\(v= \sqrt{282.24}\)
\(v= 16.8 m/s\)

Answer:

hmmmmmmmmmmmmmmm

yes.

The length of the runway where the light plane reaches the speed of 34m/s is 385.22 meters

The speed of the light plane is 34 m/s

The acceleration of the light plane is 3 m/s²

The length of the runway can be found by solving both acceleration and velocity, we will obtain the time taken and length of the runway.

             Acceleration, a = v / t

where v is the velocity

           t is the time taken

Let us substitute the known values, we get

                             3 = 34 / t

                             t = 34 / 3

                                = 11.33 s

Thus, the time taken to cross the runway is 11.33 seconds

              Then, the velocity, v = L/t

 where L is the length of the runway

             t is the time taken.

Let us substitute the known values, we get

                             34 = L / 11.33

                               L = 34 x 11.33

                                   = 385.22 meters

Therefore, the length of the runway is 385.22 meters

Learn more about the acceleration in

https://brainly.com/question/2136991

#SPJ4

The place where the projectile was launched was 20.88 m above the ground.

The horizontal velocity of the projectile was 8.57 m/s.

The vertical velocity of the projectile was -20.58 m/s just before landing.

a. To find the height of the place where the projectile was launched, we need to use the following kinematic equation for vertical motion:

h = vi * t + 0.5 * a * t^2

where:

h = height of the place where the projectile was launched

vi = initial vertical velocity (assumed to be 0 m/s)

t = time to land (2.1 s)

a = acceleration due to gravity (-9.8 m/s^2)

plugging in the values

h = 0 * 2.1 + 0.5 * (-9.8) * (2.1)^2

h = -20.88 m

b. To find the horizontal velocity of the projectile, we can use the following equation:

d = vi * t + 0.5 * a * t^2

where:

d = horizontal distance traveled (18 m)

vi = initial horizontal velocity

t = time to land (2.1 s)

a = acceleration in the horizontal direction (assumed to be 0 m/s^2)

Since the acceleration is 0, the equation simplifies to:

d = vi * t

Solving for vi, we get:

vi = d / t

vi = 18 / 2.1

vi = 8.57 m/s

c. To find the vertical velocity of the projectile, we can use the following kinematic equation for vertical motion:

vf = vi + a * t

where:

vf = final vertical velocity

vi = initial vertical velocity (assumed to be 0 m/s)

a = acceleration due to gravity (-9.8 m/s^2)

t = time to land (2.1 s)

Substituting, we get:

vf = 0 + (-9.8) * 2.1

vf = -20.58 m/s

Learn more about projectile motion at:

https://brainly.com/question/10680035

#SPJ1