an object is located in air 26 cm from the vertex of a concave surface made of glass with a radius of curvature 12cm. where does the image by refraction form? use nair

Answer:A gas heater working

Explanation:because from the system of it it could be coal or just air being heated up it takes energy to make it hot! In other words convection

Answer  is approximately 3.00 x \(10^8\) meters per second.

The equation that links the maximum electric field (Emax) and the maximum magnetic field (Bmax) of a photon of light is given by:

Emax = c * Bmax

where:

- Emax is the maximum electric field amplitude,

- Bmax is the maximum magnetic field amplitude,

- c is the speed of light in vacuum.

According to Maxwell's equations, in a vacuum, the electric and magnetic fields in an electromagnetic wave, such as a photon, are related to each other by the speed of light (c), which is approximately 3.00 x\(10^8\) meters per second. The equation above expresses this relationship, stating that the maximum electric field amplitude is equal to the speed of light multiplied by the maximum magnetic field amplitude.

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Answer:

2 meter per second

Explanation:

kinetic energy = 1/2 m v^2

20J = 1/2 × 10 × v^2

v^2 = 4

v= 2 m/s

Answer:

Time taken = 2.444sec

Explanation:

Greetings !

Given values :-

Required values:-

Solution/ work-out:-

Firstly change the km/hr value to m/s

Then, recall the Velocity-Time Equation:

\(vf = vi \: + at\)

substitute known variables into the equation

\((12.22) = (0) + (5)t\)

Solve for time

\(t = 2.444sec\)

Hope it helps!!

Answer:

10g to kg=0.01

20×0.01=0.2

Force of 0.2N

The voltage drop across C1 is 10.0 V while C3 experiences a 3.33 V voltage drop in capacitors.

This is seen below. The total capacitance of a number of capacitors connected in this fashion can be calculated by adding the individual capacitances using the method described below: C1 + C2 + C3, etc. = CTotal. An illustration would be to calculate the total capacitance of these three parallel capacitors.

The voltage drop across each capacitor is 10.0 V / 3 = 3.33 V if the voltage drop across C1 is 10.0 V.

Given that C3 is one of the series-connected capacitors, the voltage drop across C3 would also be 3.33 V.

Consequently, if C1 experiences a 10.0 V voltage drop, the 3.33 V is the voltage drop across C3.

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Answer:

σ = 1.09 mm

Explanation:

Step 1: Identify the given parameters

rod diameter = 20 mm

stiffness constant (k) = 55 MN/m = 55X10⁶N/m

applied force (f) = 60 KN = 60 X 10³N

young modulus (E) = 200 Gpa = 200 X 10⁹pa

Step 2: calculate length of the rod, L

K = \frac{A*E}{L}K=

L

A∗E

L = \frac{A*E}{K}L=

K

A∗E

A=\frac{\pi d^{2}}{4}A=

4

πd

2

d = 20-mm = 0.02 m

A=\frac{\pi (0.02)^{2}}{4}A=

4

π(0.02)

2

A = 0.0003 m²

L = \frac{A*E}{K}L=

K

A∗E

L = \frac{(0.0003142)*(200X10^9)}{55X10^6}L=

55X10

6

(0.0003142)∗(200X10

9

)

L = 1.14 m

Step 3: calculate the displacement of the rod, σ

\sigma = \frac{F*L}{A*E}σ=

A∗E

F∗L

\sigma = \frac{(60X10^3)*(1.14)}{(0.0003142)*(200X10^9)}σ=

(0.0003142)∗(200X10

9

)

(60X10

3

)∗(1.14)

σ = 0.00109 m

σ = 1.09 mm

Therefore, the displacement at the end of A is 1.09 mm

Explanation:

The emf is equal to the work done on the charge per unit charge (ϵ=dWdq) when there is no current flowing. Since the unit for work is the joule and the unit for charge is the coulomb, the unit for emf is the volt (1V=1J/C).

Answer:

The EMF or electromotive force is the energy supplied by a battery or a cell per coulomb (Q) of charge passing through it. The magnitude of emf is equal to V (potential difference) across the cell terminals when there is no current flowing through the circuit. (byjus)

Explanation:

Answer:

Explanation:

Need to scale

Answer:

The particle comes to rest before reaching the position x=4m.

Explanation:

When the object is at x=0m, all of its energy is kinetic energy. Using the equation for kinetic energy yields KE=1/2mv^2=(12)(2)(3)^2=9J. Using the given equation for potential energy when the object is at x=4m yields U=4x^2=4(4)^2=64J. Since the system only has 9J of energy, the object comes to rest before reaching x=4m.

Answer:

Acceleration, \(a=4\ m/s^2\)

Explanation:

Given that,

Initial velocity, u = 20 m/s

Final velocity, v = 60 m/s

Time, t = 10 s

We need to find the acceleration of the car. It is equal to the change in velocity divided by time.

\(a=\dfrac{v-u}{t}\\\\a=\dfrac{60-20}{10}\\\\a=\dfrac{40}{10}\\\\a=4\ m/s^2\)

So, the acceleration of the car is \(4\ m/s^2\).

A solenoid 15.0-cm length and wound without 100 turns would generate a magnetic field of 5.00 x 10-5 t at 60 mA current.

The correct answer is 60mA

The magnetic field is the area that is affected by magnetism and is located around a magnet. The magnetic field is a valuable tool for explaining the distribution of the magnetic force within and around magnetic object in nature.

The surface magnetic field and Earth's magnetic field are roughly magnetic dipoles, with the magnetic field's S pole located close to the planet's geographic north pole (see Magnetic North Pole) as well as the magnetic field's N pole located close to the planet's geographic south pole (see Magnetic South Pole).

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Answer:

d = 421.83 m

Explanation:

It is given that,

Height, h = 396.9 m

Horizontal speed, v = 46.87 m/s

We need to find the distance traveled by the ball horizontally. Let t is the time taken by the ball. Using second equation of motion for vertical direction. So,

\(396.9=0\times t+\dfrac{1}{2}\times 9.8 t^2\\\\t=9\ s\)

Now d is the distance covered by the cannonball. So,

\(d=vt\\\\d=46.87\times 9\\\\d=421.83\ m\)

Hence, this is the required solution.

The switch that adjusts the magnetic field to be either nearly uniform or have a strong gradient will affect the current in the two coils differently.

When the magnetic field is nearly uniform at the center, the current in both coils will remain relatively unchanged. The uniform field will not induce any significant voltage in the coils, so the current will flow through them as usual.

However, when the magnetic field has a strong gradient, the current in the two coils will be affected differently. The rapidly changing field will induce a voltage in the coils according to Faraday's law of electromagnetic induction. This induced voltage will result in a change in the current flowing through the coils. The magnitude and direction of the induced current will depend on the specific characteristics of the coils and the magnetic field gradient.

In summary, the switch that changes the magnetic field from uniform to having a strong gradient will induce a change in the current flowing through the coils due to the induced voltage.

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Answer:

because they are not standard unit(accepted globally)

Explanation:

hope its help

Because outside of your local group, nobody will know what you're talking about.

My people originally used the sha'ah, yom, and khelek for time, the amah for length, the tchum shabbat for distance, and the epha, omer, baytsa, log, and kazayit for volume.

See what I mean ?

Answer:

Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and brick dropped together. Air resistance causes the feather to fall more slowly.

The experimental evidence led to the development of have gathered new evidence. One of the atomic models this atomic model from the one before it is the colors of light emitted from heated atoms had very specific energies.

As scientific knowledge about the structure of the atom has changed, so have models of the atom.

The Rutherford planetary model, which depicts electrons travelling around the nucleus like planets move around the sun in the solar system, is the direct precursor of the model illustrated in the figure attached.

This model was created as a result of the study of light hues released by heated atoms with highly particular energies.

The Bohr model of the atom is so named because Niels Bohr had a major role in developing it. The passage of electrons between energy levels caused the light hues released by heated atoms. Electrons are grouped in shells or energy levels.

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An equal amount of charge flows out of the opposite plate for every charge that enters and builds up on the first plate. The capacitor appears to be conducting current as a result.

In most metals, current is made up of moving electrons, therefore conventional current traveling downhill indicates true upward electron movement.

A capacitor is a device that can store electrical energy. It is made by taking two electrical conductors (items that allow electricity to flow through them) and separating them with an insulator (a substance that doesn't let electricity flow very well). The terms charging and discharging refer to the addition of electrical energy to and removal of energy from capacitors, respectively.

The capacitance of a capacitor determines how much electrical energy it can store. A capacitor's capacitance can be compared to a bucket's volume: a larger bucket can hold more water, while a larger capacitance allows a capacitor to store more electricity. There are three methods for increasing a capacitor's capacitance. The first is to make the plates larger. The plates could also be brought closer to one another. Making the dielectric as effective an insulator as you can is the third method. Diverse materials are used as dielectrics in capacitors. In transistor radios, a sizable variable capacitor with nothing but air in between its plates performs the tuning function.

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Answer:

c

Explanation:

c

The frictional force acts opposite to the relative motion between two surfaces in contact. The magnitude of the frictional force (in N) acting on the cart is 41.16 N.

According to the given question, the force applied to the cart by the spring scale, Fa = 10.5 N. The cart is moving towards the right with an acceleration of 1.75 m/s2 towards the right. We need to find out the magnitude of the friction force (in N) acting on the cart.

We know that the frictional force (Ff) opposes the relative motion between two surfaces in contact. Hence, it acts in the opposite direction of motion or impending motion.

In this case, the cart is moving towards the right with an acceleration of 1.75 m/s2 towards the right. Therefore, the direction of frictional force will be towards the left, i.e., opposite to the direction of motion.

We can use the formula to find the magnitude of the frictional force:

Ff = μk x N

Where μk is the coefficient of kinetic friction and N is the normal force.

Since the cart is moving, we can consider that the frictional force acting on it is kinetic friction. Therefore, we can use the coefficient of kinetic friction to calculate the magnitude of the frictional force.

Now, we need to find the normal force, N.

N = m x g

Where m is the mass of the cart and g is the acceleration due to gravity.

We do not know the mass of the cart. However, we can find it using the force applied to it by the spring scale.

Fa = m x a

Where a is the acceleration of the cart.

Substituting the given values, we get:

10.5 N = m x 1.75 m/s2
m = 6 kg

Now, we can find the normal force:

N = m x g
N = 6 kg x 9.8 m/s2
N = 58.8 N

We have found the normal force, N. Now, we can use the coefficient of kinetic friction to find the magnitude of the frictional force.

The coefficient of kinetic friction can vary depending upon the nature of the surfaces in contact. Here, it is not mentioned, so let us assume a value for it. The coefficient of kinetic friction for rubber on concrete is approximately 0.7.

Therefore, the magnitude of the frictional force is:

Ff = μk x N
Ff = 0.7 x 58.8 N
Ff = 41.16 N

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Answer:

they are membrane proteins

At the equivalence point, regardless of the volume, the pH of the solution in a strong acid-strong base titration will be 7, indicating neutrality.

The pH of a solution at the equivalence point, when a strong base is added to the point of neutralizing an acid, depends on the nature of the acid and base involved. However, assuming a strong acid-strong base titration, the equivalence point occurs when equal moles of acid and base have reacted.

At the equivalence point, the solution is neutral, meaning the concentration of H+ ions and OH- ions is equal. In other words, the solution has a pH of 7, which is considered neutral on the pH scale.

It's important to note that the volume of the solution provided (48.0 mL) does not directly affect the pH at the equivalence point. The pH at the equivalence point is determined solely by the stoichiometry and nature of the acid-base reaction, rather than the volume of the solution.

Therefore, at the equivalence point, regardless of the volume, the pH of the solution in a strong acid-strong base titration will be 7, indicating neutrality.

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Answer:

koj ruam zog

Explanation:

Answer:

the answer of 7th question

Make sure your dishwasher is full before you use it – running a half-empty dishwasher wastes large amounts of energy

Try to use a cooler temperature

Consider drying your clothes outside if it’s warm instead of using the dryer

Turn off the fan when you leave a room

Close your drapes or drop your window shades during the day.

Wash your clothes in cold water.

Wrap or cover foods and drinks in the refrigerator.

Always use the cold water faucet, unless you really want hot water.

the answer of 10th question

Static electricity is used in pollution control by applying a static charge to dirt particles in the air and then collecting those charged particles on a plate or collector of the opposite electrical charge. These devices are commonly known as “electrostatic precipitators.

The change in the vertical height of the person is obtained as 2.5 m.

Let us recall that gravity is a universal force of attraction that acts on any object that is found to be on the surface of the earth. It is instructive to know that gravity can only be an attractive force.

As the  person slides down the zip wire, the position of the person is changing. We have to know that the gravitational potential energy of the person is dependent on the position of the wire. As such, as the position changes, the gravitational potential energy of the person is also changing.

Using the formula;

W = mgh

W = gravitational potential energy

m = mass of the object

g = acceleration due to gravity

h = height of the body

If we substitute the values we have;

h = W/mg

h = 1.47 * 10^3/ 9.8 * 60

h = 2.5 m

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