two charges are seperated by 1m and they exert a force of 1N on each other. If the charges are pushed to 0.25m seperation, the force on each charge will be

Explanation:

studying hard is the only thing that could make the educational system better

I think the student when he studying first time then first he want to speak Korean and study hard for that but if he try then only he can be better

Explanation:

and he or she should have interest to study if he or she have interest then only their education will be better

and if he / she didn't have interest on study then we can't do anything........

Answer:

KE = 250 kg/m/s

Explanation:

use the formula: KE = 1/2 m (v^2)

KE = 1/2 (5) (10^2)

KE = (2.5) (100)

KE = 250 kg/m/s

The two masses observed by the mass spectrometer for neon, 20 and 22 atomic mass units, can be explained by the fact that neon has two isotopes.

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons in their nuclei. In the case of neon, the two isotopes are neon-20 and neon-22. Neon-20 has 10 protons and 10 neutrons in its nucleus, while neon-22 has 10 protons and 12 neutrons.

The mass spectrometer measures the masses of these two isotopes, which are different due to the different number of neutrons. Therefore, the two masses observed by the mass spectrometer for neon can be attributed to the presence of these two isotopes in the sample being analyzed.

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Answer:

D: The particles emitted when atoms collide

Explanation:

Just took the test

The compact muon solenoid used to study when the  particles emitted when atoms collide. Option D is correct.

A coil of wire that carries an electric current is a solenoid. A solenoid is an electromagnet formed by a helical coil of wire. Which generates a magnetic field when an electric current is passed through the coil .

A solenoid is a form of coil that produces a magnetic field when the electric current is passed through it. A solenoid is created when a conductive wire is used to make a loop.

The compact muon solenoid used to study when the  particles emitted when atoms collide.

Hence, option D is correct.

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Answer:

The  value  is  \(C =  21.07 ppm\)

Explanation:

From the question we are told that

 The volume of the first  aliquot is \(V_a1  =  25.0 \  mL\)

 The  volume after dilution is  \(V_A =  50.0mL\)

 The  Absorbance of the first solution  is  \(A_1 =  0.656\)

 The  wavelength at which the absorbance occurred is   \(\lambda _1 =  348 nm  =  348*10^{-9} \  m\)

    The  length of the cell \(l  = 2.50 \  cm\)

    The volume the second  aliquot is \(V_{a2}  =  25.0 \  mL\)

     The  volume of the solution it was mixed with is  \(V_s  =  10.00mL\)

     The  concentration of quinine in the 10 mL solution  \(Z =  25.7ppm\)

    The volume of the second solution after dilution is \(V_d = 50.0 mL\)

      The  absorbance of the second solution is \(A_2 =  0.976\)

Generally the concentration of quinine is mathematically represented as

         \(C =  \frac{A_1 *Z *  V_s  }{(A_2 -A_1) V_{a2}}\)

=>    \(C =  \frac{ 0.656  *  25.7 *  10.0}{ (0.976 -  0.656) *  25}\)

=>   \(C =  21.07 ppm\)

Answer:

   I = 2 A

Explanation:

Electric current is defined as the amount of face per unit of time

         I = Q / t

where Q is the charge and t is the time

let's reduce the time to the SI system

         t = 1 min (60s / 1 min) = 60 s

let's calculate

         I = 120/60

         I = 2 A

The instantaneous rate of change of the position function y=f(t) in feet at the given time t in seconds. f(t)=3t−7,t=1 is as follow:

The function is f(t) = 3t - 7 and t = 1.

Using the concept of derivatives, the instantaneous rate of change of the position function y = f(t) in feet at the given time t in seconds is given by;

f'(t) = lim (h → 0) [f(t + h) - f(t)]/h

Now, we have f(t) = 3t - 7 and t = 1.

Substitute t = 1 in the above formula to get the instantaneous rate of change of the position function.

f'(1) = lim (h → 0) [f(1 + h) - f(1)]/h

Using the given function f(t) = 3t - 7,f'(1)

= lim (h → 0) [f(1 + h) - f(1)]/h

= lim (h → 0) [3(1 + h) - 7 - (3(1) - 7)]/h

= lim (h → 0) [3h]/h= 3

Therefore, the instantaneous rate of change of the position function y = f(t) in feet at the given time t = 1 second is 3 feet per second.

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Answer:

Acceleration.

Explanation:

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

\(a = \frac{v - u}{t}\)

Where,

a is acceleration measured in \(ms^{-2}\)

v and u is final and initial velocity respectively, measured in \(ms^{-1}\)

t is time measured in seconds.

The S.I unit for measuring acceleration is meters per seconds square (m/s²).

Hence, 10 m/s^2 is an example of acceleration.

Explanation:

First convert hours to seconds by multiplying by 3600

2×60×60=7200seconds

D=?

t=7200s

s=20m/s

D=s×t

D=s×t

D=20×7200

D=144000m

when metres is converted to kilometres you divide by 1000

D= 144000/1000

D=144km

Option A!!!

Answer:

 An amp is one C of charge per second, two minutes is 120 seconds. So current is 10 C/120 sec which is 1/12 th of an Amp. 

The mass of the car is calculated as 1021.86 kg. We can calculate the mass of the car by using the formula: mass = Force / acceleration

Given information: Acceleration of the car = 1.83 m/s²

Force acting on the car = 1870 N

We know that Force = mass × acceleration

According to the question, we need to find the mass of the car. We can calculate the mass of the car by using the formula: mass = Force / acceleration

Putting the values in the above equation, we get mass = 1870 N / 1.83 m/s²

So, the mass of the car is: mass = 1021.86 kg

Therefore, the mass of the car is 1021.86 kg.

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Answer:

It’s stratosphere

Explanation:

Most ozone is found in a region of Earth’s atmosphere between 10 and 20 miles above Earth’s surface. This temperature zone of the atmosphere is known as the stratosphere.

Ozone is an allotrope of oxygen. It is blue in color and it is found in Earth's atmosphere. It protects the Earth from ultraviolet rays from the Sun.

The ozone subcaste is centered at an altitude between 10-15 country miles (15-25 km). Close to 90% of the ozone found in the atmosphere is in the stratosphere. Ozone that is found in this region is about 10 parts per million by volume (ppmv) to the troposphere's 0.04 ppmv.

Therefore, we have determined that Most ozone is found in a region of Earth’s atmosphere between 10 and 20 miles above Earth’s surface. This temperature zone of the atmosphere is known as the stratosphere.

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Answer:

Speed of stunt bike rider = 13 meter/ Second

Explanation:

Given:

Distance cover by stunt bike rider = 39 meter

Time taken by stunt bike rider = 3 seconds

Find:

Speed of stunt bike rider

Computation:

Speed = Distance / Time

Speed of stunt bike rider = Distance cover by stunt bike rider / Time taken by stunt bike rider

Speed of stunt bike rider = 39 / 3

Speed of stunt bike rider = 13 meter/ Second

When you calculate the speed of a treadmill at 3.5 mph and obtain the same value, it indicates that the treadmill is properly calibrated and accurately measures the speed.

The speed of a treadmill is typically set by the user or controlled by the treadmill's console. If the speed is displayed as 3.5 mph and your calculation also yields 3.5 mph, it suggests that the treadmill is functioning correctly and accurately measuring the speed.

To ensure accurate speed measurements, treadmills undergo calibration processes during manufacturing or maintenance. Calibration involves setting the treadmill's speed settings to correspond accurately to the displayed values. This ensures that users can rely on the displayed speed as an accurate representation of their pace.

If the calculated speed significantly differed from the displayed speed, it could indicate a calibration issue, mechanical problem, or error in measurement. However, in this scenario where the calculated speed matches the displayed speed, it is an indication that the treadmill is calibrated correctly and provides accurate speed measurements.

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As an airplane flying with constant velocity moves from a cold air mass into a warm air mass, the Mach number will decrease.

The Mach number is defined as the ratio of the aircraft's velocity to the speed of sound in the surrounding air.

Mathematically, Mach number (M) = (aircraft velocity) / (speed of sound in the air).

The speed of sound in air is affected by temperature, with the speed of sound increasing as the temperature increases.

When the airplane moves from a cold air mass into a warm air mass, the speed of sound in the surrounding air will increase due to the temperature increase.

Since the airplane is flying with constant velocity, the numerator (aircraft velocity) in the Mach number formula remains the same.

However, as the speed of sound in the air (denominator) increases, the Mach number (M) will decrease.

In summary, when an airplane with constant velocity moves from a cold air mass to a warm air mass, the Mach number decreases due to the increase in the speed of sound in the warmer air.

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Answer:

closer together

Explanation:

hope i hv answered ur question

Answer:

i have no idea

Explanation:

Answer:

An object launched from 65° will have the same range as an object launched from 25°

Explanation:

The formula for the horizontal range, R, is given as follows;

\(R = \dfrac{v \times sin(2\cdot \theta)}{g}\)

Therefore, given that sinθ increases from 0 to 1 for θ values from 0 to 90° and decreases from 1 to 0 for θ values from 90° to 180°, and that the values of sin(θ) are positive in the first and second quadrant, we have that for the given angle, θ = 65°, the range is therefore;

\(R = \dfrac{v \times sin(2\times 65 ^{\circ})}{g} = \dfrac{v \times sin(130 ^{\circ})}{g}\)

The location of 130° = Second quadrant

A rotation of 130° in the counterclockwise is equivalent to a rotation of 50° in the clockwise direction

Therefore, we have sin(130°) = sin(50°)

Therefore, the range for 130°/2 = 65° is the same as the range for 50°/2 = 25° and an object launched from 65° will have the same range as an object launched from 25°.

In a rotating space habitat, the outward force felt by the person is called centrifugal force. This force acts perpendicular to the axis of rotation and creates artificial gravity, allowing the person to experience a sense of weight.

Consider someone in a rotating space habitat. The outward force felt by the person is the centrifugal force. This force is caused by the person's inertia as they move in a circular path around the center of the habitat. The faster the habitat rotates, the greater the centrifugal force the person will feel pushing them away from the center of rotation. This force is counteracted by the gravitational force of the habitat, which keeps the person from flying off into space.
In a rotating space habitat, the outward force felt by the person is called centrifugal force. This force acts perpendicular to the axis of rotation and creates artificial gravity, allowing the person to experience a sense of weight.

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5) Spinning blades may injure or kill aquatic species.

6)  During high tide, the ocean's waters creep up the shore, deepening the water. This happens as a body of water gets closer to one of the two bulges created by the moon's gravitational force

Answer:

7/20

Explanation:

0.35 as a fraction =35/100

35/100 can b divided by 5 so =7/20

0.350 simplified as a fraction is 7/20

Answer:

7/20

Explanation:

Answer:

(a)3.09 m/sec (b)θ= 35.28° (c) t =3.43 sec

Explanation:

Solution

Given that:

The swimming speed of swimmer =5.35 m/s

The downstream angle = 30°

Now,

(a)we find speed of the current which is given below:

V = V swimmer + V river

Tan 30° = Vr/Vs

Thus

Vr = 5.35 * tan 30°

Vr = 5.35 * 0.5773

= 3.09 m/sec

(b)She would have velocity at direction such that she reaches across the shore

Then

Vs sin θ =Vr

sin θ = Vs/Vr

sin θ = 3.09/5.35

θ= 35.28°

Therefore, She had to make θ= 35.28° on another side of the river

(c) Thus

t = d/Vs cosθ

=15/5.35 * cos (35.28°)

t =3.43 sec

The change in the speed of the bicyclist and the bicycle is 4 meters per second.

Speed is the distance covered by an object in a particular time period. Speed is different from velocity, as it is a scalar quantity due to no direction. Whereas, velocity is a vector quantity due to both direction and magnitude.

Acceleration = Rate of change in velocity

Acceleration = Change in velocity/ Time taken

a = (v-u)/t

a = 1m/s²

t = 4 seconds

(v-u) = ΔV = ?

a = ΔV/ t

1 = ΔV/ 4

ΔV = 1×4

ΔV = 4 meters per second.

The change in the speed is 4 meter per second.

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A force known as friction prevents movement between two surfaces that are in touch. A static frictional force acts on an object when it is at rest on a surface and stops it from moving. An external force that is stronger than the static frictional force.

However, the frictional force switches from static to kinetic as soon as the item begins to move. Although it can do so when moving quickly or under a lot of stress, the coefficient of kinetic friction is typically lower than the coefficient of static friction. This implies that the amount of force needed to overcome friction may rise when the object moves faster or is subjected to more force.

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The object's rotational inertia begins to decrease under torque. Torque has a tendency to twist an item or alter its state of rotation.

Describe torque.

The power that can cause an object to rotate around an axis is measured in torque. Similar to how force accelerates an object in linear mechanics, torque accelerates an object in an angular direction. A vector number is a torque.

Force and acceleration are related by Newton's second equation. Torque and rotary inertia replace force and mass, respectively, in the angular application of Newton's Second Law. The relationship between angular acceleration and torque holds true when an object's circular inertia is constant.

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Answer:

Explanation:

Mass of sofa(m) = 105 kg

Force= 403 N

F = μ*N

Where:

F = friction force = 403 [N]

μ = static coefficient

N = Normal force [N]

The normal force of a body lying on a horizontal surface can be calculated by means of the product of mass by gravitational acceleration.

mass × acceleration due to gravity = 105 × 9.8  =  1029

403= μ *1029

substitute force with 403 N and resistance with 1029 × μ

                                    403 = 1029 × μ

                                         μ = 403/1029

                                            = 0.391

Answer = 0.391

Cerebrospinal fluid (CSF) is formed in the choroid plexus of the brain and circulates through the ventricles and subarachnoid space, providing cushioning and nourishment to the brain and spinal cord.

The meninges are three layers of protective tissue surrounding the brain and spinal cord. The innermost layer, the pia mater, is in direct contact with the nervous tissue. The middle layer, the arachnoid mater, is separated from the pia mater by a narrow subarachnoid space filled with CSF. The outermost layer, the dura mater, is thick and tough, forming the protective outermost covering.

The choroid plexus in the ventricles of the brain secretes CSF, which provides cushioning, nourishment, and waste removal for the brain and spinal cord. The CSF flows through the ventricles and subarachnoid space, absorbed back into the bloodstream via arachnoid villi in the dural sinuses. Any disruption to the production or flow of CSF can lead to neurological symptoms and conditions.

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