what is my real name

Because solid concrete is stiffer, denser, and typically warmer than air, the speed of sound in solid concrete is faster than in air.

The sound wave moves at a 340 m/s pace. D = v • t can be used to calculate the distance, giving a value of 25.5 m. Since 0.150 seconds is the round-trip distance, use 0.075 seconds for the time.

The speed at which a sound source needs move in the direction of a stationary observer in order to double the apparent frequency. 640 m s - 1.

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If there are both electric and magnetic fields in the room and their effects on the charged particle cancel, and the electric field points upward, then the direction of the magnetic field is downwards.

The electric force on a charged particle is provided by an electric field, whereas the magnetic force is provided by a magnetic field. The effect of the electric and magnetic fields on the motion of the particle is a function of the relative directions and magnitudes of the two fields.

If the magnetic field is perpendicular to the electric field and the particle's velocity, the magnetic force is at right angles to both the electric force and the velocity, and it does not adjust the particle's speed. If the electric and magnetic forces on a charged particle are equal and opposite, they cancel each other out, resulting in no acceleration of the charged particle. Since the electric field is pointing upward, the magnetic field should be pointing downward.

In conclusion, the direction of the magnetic field is downward if the electric field is pointing upward, according to the given condition.

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We know, formula of capacitance in parallel plate capacitor is given by :

\(C = \dfrac{\epsilon_o A}{d}\)

Here, \(\epsilon_o = 8.85 \times 10^{-12} \ F.m^{-1}\)

So,

\(A = \dfrac{Cd}{\epsilon_o}\\\\A = \dfrac{1.11 \times 10^{-9}\times 8.89 \times 10^{-7}}{8.85\times 10^{-12}}\\\\A = 1.11 \times 10^{-4}\ m^2 \ or \ 1.11 \ cm^2\)

Hence, this is the required solution.

Answer:

7.09797297 • 10^-7

Explanation:

You just follow the formula:

C = εA/d

ε = 8.85 • 10^-12

A = 8.89 • 10^-7

D = 1.11• 10 ^-9

So:

C = (8.85 • 10^-12)(8.89• 10^-4)/1.11 • 10 ^-9 = 7.09797297 • 10^-7

Good Luck!  :)

Answer:

In general there are three sub-segments of "alternative" energy investment: solar energy, wind energy and hybrid electric vehicles

Answer:

5

Explanation:

hookes law, f=kx

the force which is the mass,0.1, is equal to the constant multiplied by thd extension,0.02, so

0.1= f×0.02

0.1/0.02=5

(I) The focal length of the lens is 180.0 cm.

(II) The distance for which the image would be the same size as the object is 90.0 cm.

We can use the lens equation and the magnification formula to solve for the focal length of the lens and the distance for which the image would be the same size as the object.

The lens equation is:

1/f = 1/do + 1/di

where;

We are given that the distance between the image and the object is 90.0 cm and the magnification is 2. The magnification formula is:

m = - di/do

where;

Substituting these values into the magnification formula, we get:

2 = - di/do

di = -2do

Substituting these values into the lens equation, we get:

1/f = 1/do - 1/2do

Simplifying this equation, we get:

1/f = 1/2do

f = 2do

Substituting the given value of di, we get:

f = 2(-90.0 cm) = -180.0 cm

Since the focal length must be positive for a converging lens, we take the absolute value and get:

f = 180.0 cm

(ii) Distance for which the image would be the same size as the object:

When the image is the same size as the object, the magnification is 1. We can use the magnification formula to solve for the distance di:

m = - di/do

1 = - di/do

di = -do

Substituting the given value of do, we get:

di = -90.0 cm

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The extension of the spring is 4.83 m, if work done is 35 Newton and spring constant is 3 k N/m.

The spring constant, k, is a measure of the stiffness of the spring. it's far one of a kind for unique springs and materials. the larger the spring regular, the stiffer the spring and the greater.

Spring constant of 3 k N/m,

The amount of work done in extending is 35 N

WORK DONE by spring force = 1/2 k X²

                                                 ⇒0.5 * 3 * X²

                                   35 N = 0.5 * 3 * X²

                                 X² = 35/1.5

                                  x = \(\sqrt{23.33}\)

                                     X = 4.83 m

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The extension of the spring is can be found out by using the Work Done due to extension in Spring Constant K. The extension in the spring is 4.83m.

The spring constant, k, is a measure of the stiffness of the spring. It is for springs and materials which measures the ratio of force that affects the spring and the displacement caused by the force action.

Spring constant depends on the stiffness of the spring, wire thickness, number of turns in wound coil, length of spring and diameter of the coil.

Given:

Spring constant = 3000 N/m

Work Done in extension= 35 N

Let the extension in spring by x.

∴ Work Done by spring force = 1/2 kx²

                        Work done   = 0.5 × 3 × x²

    ⇒                                 35 N = 0.5 × 3 × x²

    ⇒                                      x² = 35/1.5

     ⇒                                         x = 4.83m

Hence, the extension of spring is 4.83m.

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Answer:

T = 0.00025 secs

Explanation:

Given:

Frequency = 4 kHz = 4000 Hz

Required:

Time Period = ?

Formula:

T = 1/f

Solution:

T = 1/4000

T = 0.00025 secs

Answer:

0.00025 seconds

Explanation:

Time period = 1 / frequency

= 1/4000

= 0.00025 seconds

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Answer:

amu is atomic mass unit

All of elements hydrogen is the lightest.

Hydrogen is taken as a basic unit so it happened 1amu

So 1 amu must be hydrogen mass

If I am wrong,Pls tell me the true answer....

Answer:

False

Explanation:

I'm not the most sure but it seems reasonable that it's false

Good Luck Bestie :3

Answer:

The answer is false. If you want why. I will desxribe you.

While spinning down from 500. 0 rpm to rest, a solid uniform flywheel does 5. 1 kJ of work. If the radius of the disk is 1. 2 m, its mass will be 28.33 kg

Work done = change in kinetic energy

kinetic energy = 1/2 * I * \(omega^{2}\)

since , moment of inertia of disk = m\(r^{2}\) / 2

kinetic energy = 1/2 *  m\(r^{2}\) / 2  *  \(omega^{2}\)

  5100              = 1/4 * m * \(1.2^{2}\) * 500

mass = 28.33 kg

If the radius of the disk is 1. 2 m, its mass will be 28.33 kg

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Answer:

the answer is that it increases by a factor of 16

Explanation:

ANSWER

EXPLANATION

We want to find the angle of reflection of the ray of light.

According to the law of reflection, the angle of reflection must be equal to the angle of incidence of a ray of light:

Therefore, the angle of reflection of the ray of light is:

That is the answer.

Answer:

Explanation:

Answer:

Earth receives the perfect amount of heat and light that allow life to flourish

Answer: Solenoid

Explanation:

Answer:

Solenoid

Explanation:

To calculate the friction force when a ball travel through a loop , we should use ½ mv^2 + mgh.

Physical friction is all around us. Static friction is the resistance to an object moving along a path. Finally, explain it with a simple example. Consider the common activity we all engage in: walking. While working, we are constantly in contact with the floor. As we advance our feet, motion pushes against the ground as we move backward. The fact that friction operates in the opposite direction from relative motion is one important concept to be aware of in order to minimize friction. This phenomenon might be helpful for slowing down the action until it eventually stops.

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Metals' conductivity is a result of electrons' unrestricted motion. Free-moving, delocalized electrons are present in metals. The movement of the  free electrons causes them to travel from one end of the conductor to the other when electric voltage is applied.

Particles that are electrically charged migrate, which results in electrical conductivity in metals. The existence of valence electrons, which are electrons in an atom's outer shell that are free to move, is what distinguishes the atoms of metal elements. Metals can carry an electric current thanks to these "free electrons." Valence electrons can migrate through the lattice that makes up the physical structure of a metal because they are free to do so. Free electrons pass an electric charge as they move through the metal in an electric field, resembling billiard balls striking one another.

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Contact angle between mercury and glass is 140.6 degrees.

The difference in heights of mercury inside the tube and outside the tube is 5 cm. Using the formula h = 2T cos θ / ρgr, where h is the height difference, T is the surface tension of mercury, θ is the contact angle, ρ is the density of mercury, g is the acceleration due to gravity, and r is the radius of the tube, we can solve for θ. Substituting the given values, we get θ = 140.6 degrees.

The contact angle is the angle between the tangent to the surface of the mercury where it meets the glass and the surface of the glass itself. This angle depends on the adhesive forces between the liquid and the solid, and the cohesive forces within the liquid. In this case, we have a mercury-glass interface. The formula used to solve for the contact angle is derived from the balance of forces acting on the mercury in the tube, which is caused by the competition between the surface tension of the mercury and the gravitational force acting on it. .

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All of the determinants listed are factors that can affect the price elasticity of demand.

The determinant of the price elasticity of demand that is NOT one of the determinants is:

D) Availability of substitutes

The determinants of price elasticity of demand include:

A) Availability of close substitutes: If there are many close substitutes available for a product, consumers have more options to switch to alternative products when the price changes, resulting in higher price elasticity of demand.

B) Necessity or luxury goods: Necessity goods tend to have lower price elasticity of demand because consumers are less likely to change their purchasing behavior even if the price changes. Luxury goods, on the other hand, tend to have a higher price elasticity of demand as consumers may be more responsive to price changes.

C) Proportion of income spent: If a product represents a significant proportion of a consumer's income, the price elasticity of demand is likely to be higher. Consumers are more sensitive to price changes for products that consume a larger portion of their income.

D) Availability of substitutes: This option is incorrect as it is indeed one of the determinants of price elasticity of demand. The availability of substitutes affects the price elasticity of demand. When there are more substitutes available, consumers have more options to switch to alternative products, making the demand more elastic.

Therefore, the correct answer is not provided in the options given, as all of the determinants listed are factors that can affect the price elasticity of demand.

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Under the assumption of a single point charge of +1.0 C located at the origin, the magnitude of the electric field at point P on the positive x-axis at x = 40.0 cm is approximately 56.25 × 10^9 N/C.

To determine the magnitude of the electric field at point P on the positive x-axis, we need additional information such as the configuration of charges or the distribution of the electric field sources.

Without that information, it is not possible to provide a specific value for the electric field magnitude at point P.

However, if we assume a simple scenario where there is a point charge located at the origin (x = 0) and no other charges or sources nearby, we can use Coulomb's law to calculate the electric field magnitude at point P.

Coulomb's law states that the electric field magnitude created by a point charge is given by:

E = k * (Q / r^2)

Where:

- E is the electric field magnitude.

- k is Coulomb's constant, approximately equal to 9 × 10^9 N m²/C².

- Q is the charge of the point charge.

- r is the distance between the point charge and the point where the electric field is being measured.

Let's assume a point charge Q = +1.0 C at the origin (x = 0) and calculate the electric field magnitude at point P, located at x = 40.0 cm (0.40 m):

r = 0.40 m

Q = +1.0 C

k = 9 × 10^9 N m²/C²

Plugging these values into the equation, we have:

E = (9 × 10^9 N m²/C²) * (1.0 C) / (0.40 m)^2

Simplifying further:

E = (9 × 10^9 N m²/C²) * (1.0 C) / (0.16 m²)

E = 56.25 × 10^9 N/C

Therefore, under the assumption of a single point charge of +1.0 C located at the origin, the magnitude of the electric field at point P on the positive x-axis at x = 40.0 cm is approximately 56.25 × 10^9 N/C.

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Answer:

(1)

H² = B² × L²

H² = (9.2)² × (5.2)²

H² = 84.64 × 27.04

H² = 2288.6656

H = √ 2288.6656

H = 47.84

Answer:

Use Pythagorean theorem

19) A² + B² = C²

5.2² + 9.2² = C²

C = √111.68

C = 10.567875...

C ≈ 10.6

21) A² + B² = C²

B² = C² - A²

B² = 7.2² - 5.3²

B = √23.75

B = 4.873397...

B ≈ 4.9

\( \qquad \qquad \bf \huge\star \: \: \large{ \underline{Answer} } \huge \: \: \star\)

\(\textsf{ \underline{\underline{Steps to solve the problem} }:}\)

In the given equation :

\( \qquad❖ \: \sf \:y = a + b + c( {t}^{2} )\)

If three physical quantities is to be added or subtracted, they must have same dimensions.

So, dimension of y = dimension of c(t²)

And we already know,

( by squaring )

Now, we need to calculate dimension and unit of c :

\( \qquad❖ \: \sf \:dim(y) = dim(c {t}^{2} )\)

\( \qquad❖ \: \sf \:M⁰L¹T⁰ = dim(c) \sdot M⁰L⁰T²\)

\( \qquad❖ \: \sf dim(c) = \frac{M⁰L¹T⁰}{ M⁰L⁰T²} \)

\( \qquad❖ \: \sf dim(c) = {M⁰L¹T {}^{ - 2} }\)

Now, we got the dimension of c as :

So, it's SI unit will be :

[ since SI unit of length/distance = m, and SI unit of Time = sec, hence SI unit of T² = s² ]

Question

If y = a + by + c(t)^2 where y = distance , t = time , find the dimension and unit of c.

\(\boxed{\green{c=M^0L^1T^{-2}}}\)

Solution Given:

We know that

Law of Homogeneity of Dimensions In any correct equation representing the relation between physical quantities, the dimensions of all the terms must be the same on both sides.

Dimension of Time is denoted by [T]

Dimension of distance is denoted by [L]

Dimension of mass is denoted by [M]

So,

Dimension of a, by, c(t)^2  should be equal to y.

y=[L] .......[1]

a=[L].......[2]

by=[L].......[3]

c(t)^2=[L].....[4]

Now

The dimension of c can be obtained as:

c(t)^2=[L]

c= \( \frac{[L]}{[T^2]}\)

\(\boxed{\green{c=M^0L^1T^{-2}}}\)

Sry for late!!

(this might be wrong sorry) Maybe both.?

Answer:soccer ball

Explanation: because it have more mass than the beach ball

The force body diagram is given below:

Here,

F(N) = Normal force

F = Force

a = acceleration

m = mass

g = acceleration due to gravity

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The total impedance of the circuit is 40.274 Ω.

To calculate the total impedance of the circuit, we need to consider the resistance and reactance components.

The resistance component is given by the value of the resistor, which is 20 Ω.

The reactance component is given by the inductor, and it depends on the frequency (f) and the inductance (L) according to the formula:

XL = 2πfL

Substituting the given values:

XL = 2π * 60 Hz * 0.093 H ≈ 35.034 Ω

The total impedance (Z) of the circuit is the combination of the resistance and reactance components. Since they are in series, we can use the Pythagorean theorem to calculate it:

Z = \(\sqrt{(R^2 + XL^2)}\)

Substituting the values:

Z = \(\sqrt{(20^2 + 35.034^2)\)

  ≈ 40.274 Ω

Therefore, the total impedance of the circuit is approximately 40.274 Ω.

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Physical and mental training helps to increase endurance.

It should come as no surprise that helping your body will also benefit your mind. Your brain receives more oxygen when you exercise. Additionally, it raises your brain's levels of endorphins, or "feel-good" chemicals. This is why it makes sense that those who maintain a healthy physical state also frequently exhibit higher levels of mental agility.

Exercise your mind just as much as your body. A study published in the Proceedings of the National Academy of Sciences claims that specific memory workouts can improve "fluid intelligence," or the capacity to reason and solve novel challenges.

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The region (A to E) along the horizontal axis where a point exists at which the net electric field is zero is point C.

An electric field refers to the physical field surrounding electrically charged particles which exerts force on all other charged particles in the field, either attracting or repelling them. It also refers to the physical field for a system of charged particles. It is defined as the electric force per unit charge. The field direction is taken as the direction of the force it would exert on a positive test charge. The direction of the electric field is always away from the positive charge and towards the negative charge. As seen in the diagram, both positive charges are equidistant from region C, and the strength of charges of the particle is the same in magnitude but opposite in direction, so the net electric field of both charges will be zero in region C.

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To calculate the amount of fuel needed, we can use the concept of conservation of momentum. The change in velocity can be achieved by expelling mass at a specific exhaust velocity.

First, let's calculate the initial momentum of the spaceship:

Initial momentum = mass * velocity

Initial momentum = 6000 kg * 500 m/s

Initial momentum = 3,000,000 kg·m/s

To achieve a final velocity of 600 m/s, the spaceship needs to increase its momentum by:

Change in momentum = mass * change in velocity

Substituting the given values:

Change in momentum = mass * (final velocity - initial velocity)

Change in momentum = 6000 kg * (600 m/s - 500 m/s)

Change in momentum = 6000 kg * 100 m/s

Change in momentum = 600,000 kg·m/s

Now, let's determine the amount of fuel needed by considering the exhaust velocity. The change in momentum is equal to the momentum gained by the expelled fuel:

Change in momentum = expelled mass * exhaust velocity

Substituting the given values:

600,000 kg·m/s = expelled mass * 1.5 km/s

To convert the exhaust velocity to m/s:

1.5 km/s = 1500 m/s

Now we can solve for the expelled mass:

expelled mass = change in momentum / exhaust velocity

expelled mass = 600,000 kg·m/s / 1500 m/s

expelled mass = 400 kg

Therefore, the spaceship would need 400 kg of fuel to increase its velocity from 500 m/s to 600 m/s with an exhaust velocity of 1.5 km/s.