the vibrations of a longitudinal wave move in a direction a. along the direction of wave travel. b. at right angles to the direction of wave travel. c. that changes with speed.

Answer: 4.214 N

Explanation: Given Mass = .43kg

Weight  = mxa ...........(On earth a= 9.8 m/s2)

so .43X 9.8 = 4.214 N

as SI unit of weight if N

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The output model of an operational amplifier is modeled as a dependent voltage source in parallel with a resistor Oe. An independent voltage source in series with a resistor.

The output model of an operational amplifier is modeled as a dependent voltage source in parallel with a resistor Oe. An independent voltage source in series with a resistor. In a dependent voltage source, the output voltage depends on the input voltage and the gain. On the other hand, the independent voltage source does not depend on any other element in the circuit. The resistor in series with the independent voltage source is the output resistance of the op-amp. The resistor in parallel with the dependent voltage source is the parallel resistance of the load. In this way, the output model of an operational amplifier is modeled.

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The statement that best describes the relative motions of the Pacific and Nazca plates is as follows:

Thus, the correct option for this question is C.

The Relative motion may be defined as the process that significantly involves the motion or speed of any object with respect to a particular point.

According to the context of this question, a mid-ocean ridge separates the Pacific plate and the Nazca plate off the western coast of South America. The relative motion of both these two plates with respect to South America possesses in a bidirectional manner. As the Pacific plate is moving to the west, and the Nazca plate is moving to the east.

Therefore, the correct option for this question is C.

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Answer:

24.5°C

Explanation:

Answer:

the man is moving relative to the plane at a speed of 238 m/s toward the east.

Explanation:

The man's velocity relative to the Earth can be calculated by subtracting the velocity of the plane from the man's velocity:

Relative velocity of the man = Velocity of the man - Velocity of the plane

Given:

Velocity of the man = 7 m/s (toward the back of the plane)

Velocity of the plane = 245 m/s (flying west)

Relative velocity of the man = 7 m/s - 245 m/s = -238 m/s

The negative sign indicates that the man is moving in the opposite direction to the plane's velocity. So, the speed of the man relative to the plane is 238 m/s, and the direction is toward the east.

Answer:

Explanation:

A plane mirror is the kind you look into when you look into a "regular" mirror. The image you see is right-side-up. These images are virtual. Real images are always upside down and are made by mirrors that are "parabolic" in shape. Virtual images are always right-side-up.

Q=ne will be the formula used to determine the number of electrons. More details The quantity of energy or electrons that are transferred from one body to another by a variety of modes, such as conduction, induction, etc., is known as an electric charge.

A negatively charged subatomic particle known as an electron can either be free or attached to an atom (not bound). One of the three main types of particles within an atom is an electron that is bonded to it; the other two are protons and neutrons. The nucleus of an atom is made up of electrons, protons, and neutrons together.

By exchanging electrons to form chemical bonds, atoms join together to form molecules and compounds. Knowing the number of electrons attached to each atom is the first step in comprehending the nature of this bonding. You may determine the amount of electrons in a substance based on its chemical formula using information from a periodic chart of the elements and some simple math.

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The mass of an airplane is  79878 kg.

The product of a particle's mass and velocity is its momentum. Momentum is a vector quantity, meaning it has both magnitude and direction. According to Isaac Newton's second equation of motion, the force acting on a particle equals the time rate of change of momentum.

Given that: an airplane is flying at 246 m/s and has a momentum of 1.968 x 10^7 kg-m/s.

Hence, mass of the airplane = momentum of the airplane/speed

=  (1.968 x 10^7 kg-m/s)/246 m/s

= 79878 kg.

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The maximum speed of the ejected electrons when photons with energy 6.0 eV shine on the surface of tungsten is approximately 1.64 x 10^6 m/s.


1. First, determine the energy difference between the photon energy and the work function of tungsten:
Energy difference = Photon energy - Work function = 6.0 eV - 4.50 eV = 1.50 eV.

2. Convert the energy difference from electron volts (eV) to joules (J):
1 eV = 1.6 x 10^-19 J, so 1.50 eV = 1.50 * 1.6 x 10^-19 J = 2.4 x 10^-19 J.

3. Use the kinetic energy formula to calculate the maximum speed of the ejected electrons:
Kinetic energy = (1/2) * m * v^2, where m is the electron mass and v is the maximum speed. The mass of an electron (m) is approximately 9.11 x 10^-31 kg.

4. Rearrange the formula to solve for the maximum speed (v):
v = sqrt(2 * Kinetic energy / m) = sqrt(2 * 2.4 x 10^-19 J / 9.11 x 10^-31 kg) = 1.64 x 10^6 m/s.

When photons with energy 6.0 eV shine on the surface of tungsten, which has a work function of 4.50 eV, the maximum speed of the ejected electrons is approximately 1.64 x 10^6 m/s.

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The statement that does not explain why the apple speeds up as it falls is "The momentum of earth -apple system is conserved." The correct answer is Option A.

Momentum is the measurement of an object’s motion in relation to its mass and velocity. The formula for momentum is P = m x v where P stands for momentum, m stands for mass, and v stands for velocity.

Newtons Second Law states that force is equal to the change in momentum per change in time. The formula for Newton's Second Law is F = m x a where F stands for force, m stands for mass, and a stands for acceleration.

According to Newton's Second Law, an object's speed and direction can be altered by forces acting on it. Therefore, the fact that "The momentum of earth -apple system is conserved" does not affect the speed of the apple as it falls. So, option (a) is correct.

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you a 8 years oodn

Explanation:

The distance from the base of the cliff is 13.67 m.

The impact velocity of the block when it falls off the cliff is 15.3 m/s.

Initial velocity of the block, u = 15 m/s

Mass of the block, m = 5 kg

Coefficient of friction, μ = 0.3

Height of the cliff, h = 12 m

μmg = ma

a = μg

a = 0.3 x 9.8

a = 2.94 m/s²

At the initial surface,

Total energy of the block = 1/2mu² - mgh'

E = m(u²/2 - gh)

E = 5(15²/2 - 9.8 x 5)

E = 5 x 63.5

E = 317.5J

The impact velocity of the block when it falls off the cliff is given by,

1/2 mv² = mgh

v = √2gh

v = √(2 x 9.8 x 12)

v = √235.2

v = 15.3 m/s

The distance from the base of the cliff is given by,

R = v√(2h/g)

R = 15.3 x√(2 x 13/9.8)

R = 15.3 x 1.628

R = 13.67 m

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The molality of the solution made by dissolving 4.08 g of hexane in 89.1 g of benzene is 0.527 M

This is simply defined as the mole of solute per kilogram of solvent. It can be expressed mathematically as:

Molality = mole of solute / mass (in Kg) of solvent

Mole = mass / molar mass

Mole of hexane = 4.08 / 86

Mole of hexane = 0.047 mole

The molality of the solution can be obtained as illustrated below:

Molality = mole of solute / mass (in Kg) of solvent

Molality = 0.047 / 0.0891

Molality = 0.527 M

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Jean Piaget is best known for his pioneering work in the area of cognitive development.

Jean Piaget is the person who studied cognitive development extensively.

According to the Piaget, the building of schema consists of assimilation and accommodation.

There are 4 stages in cognitive development of Piaget's theory as Sensorimotor, Pre-operational, Concrete-operational, and Formal-operational.

The psycologist who introduced the theory of sociocultural cognitive development is Lev Semenovich Vygotsky.

Authoritative is a parenting style that rules are not set in stone and childrens’ ideas and concerns are listened to.

The theory of psychosocial developments  which was developed by Erik Erikson has 8 stages.

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According to Heisenberg's Uncertainty Principle, it is impossible to determine the position and momentum of a particle with absolute certainty at the same time. The Uncertainty Principle is defined as Δx * Δp ≥ h/4π, where Δx is the uncertainty in position, Δp is the uncertainty in momentum, and h is Planck's constant.
For the given problem, the uncertainty in position of a proton with mass 1.673 x 10-27 kg and kinetic energy 1.2 keV can be calculated as follows:

We know that the momentum p of a particle is given by p = mv, where m is the mass of the particle and v is its velocity.
The kinetic energy of the proton can be converted to momentum using the equation E = p²/2m, where E is the kinetic energy.
1.2 keV = (p²/2m)    (1 eV = 1.6 x 10^-19 J)
p²/2m = 1.92 x 10^-16 J
The momentum p of the proton can be calculated by taking the square root of both sides:
p = √(2mE) = √(2 x 1.673 x 10^-27 x 1.6 x 10^-16) = 7.84 x 10^-22 kg m/s

Using Heisenberg's Uncertainty Principle, we can calculate the uncertainty in position as follows:
Δx * Δp ≥ h/4π
Δx ≥ h/4πΔp
Substituting the values of h, Δp, and solving for Δx:
Δx ≥ (6.626 x 10^-34)/(4π x 7.84 x 10^-22)
Δx ≥ 2.69 x 10^-12 m

Therefore, the uncertainty in position of the proton is 2.69 x 10^-12 m.

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For the same reason that you can skate around a curve at constant speed but not with constant velocity.

The DIRECTION you're going is part of your velocity, but it's not part of your speed.

If the DIRECTION changes, that's a change of velocity.

The object doesn't have to change speed to have a different velocity. A change of direction is enough to do it.

And any change of velocity is called acceleration.

Answer:

The last one makes the most sense as they combine two like things that are easy to visualize

Explanation:

Answer:

C. The inner planets are like hard butterscotch candy and the outer planets are like cotton candy.

Explanation:

Right on ED2021, goodluck!

The work done by a constant force acting on an object is equal to the product of the magnitudes of the displacement and the component of the force parallel to that displacement.

Work is a measure of energy transfer, and it is calculated as the product of the force applied on an object and the distance over which the force is applied. However, when the force is not applied in the same direction as the object moves, only the component of the force parallel to the displacement of the object will contribute to the work done.

This principle is known as the work-energy theorem and is commonly used in physics to calculate the amount of work done on an object in a particular situation.

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Answer:

i think it is True

Answer:

it is 4m

Explanation:

A strontium ion has four shells in this ion, so the number of electrons it have in is  36 electrons 29.

The chemical element strontium is a soft, silver-white, yellowish metallic element that is an alkaline earth metal and has a strong reactivity to chemicals. The most prevalent type of strontium found in dietary supplements is strontium chloride. Several distinct forms of strontium are employed in medicine.

Subatomic particles known as electrons have an intrinsic charge of magnitude -1. The size of an electron's charge is comparable to that of a proton, but its symbol is the opposite. The amount of electrons and protons in electrically neutral atoms and molecules should therefore be equivalent.

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The idea that the luminous matter in the Milky Way is much like the tip of an iceberg refers to the fact that the visible stars and gas clouds in the galaxy only make up a small fraction of the total matter present. Just like the tip of an iceberg only represents a small portion of the ice below the surface, the luminous matter we can see in the Milky Way is only a small fraction of the total matter present.

This is because the majority of the matter in the Milky Way is made up of dark matter, which does not emit or absorb light and is therefore invisible to telescopes.
Scientists estimate that dark matter makes up around 85% of the total matter in the universe, and its presence is inferred from the gravitational effects it has on luminous matter. Dark matter is thought to be distributed throughout the galaxy, forming a halo around the visible stars and gas clouds. It extends much further from the galactic center than the luminous matter, which is essentially floating on the surface of a great sea of dark matter.
Although black holes are certainly interesting objects in the Milky Way, they do not play a significant role in the idea that luminous matter is like the tip of an iceberg. Instead, it is the presence of dark matter that dominates the total matter present in the galaxy and makes up the vast majority of its mass. Therefore, the idea that the luminous matter in the Milky Way is much like the tip of an iceberg emphasizes the importance of dark matter in shaping the structure and evolution of galaxies like our own.

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The speed of the first marble is 0.355 m/s and the speed of the second marble is 1.125 m/s immediately after the collision.

To solve this problem, we will use the concept of the conservation of momentum and the conservation of kinetic energy.Conservation of momentum (P) = m1v1 + m2v2, where, m1 = mass of first object, v1 = initial velocity of first object, m2 = mass of second object, v2 = initial velocity of second object

Conservation of kinetic energy (KE) = 0.5 m1v1² + 0.5 m2v2² where, KE = kinetic energy of the system m1 = mass of first object v1 = initial velocity of first object m2 = mass of second object v2 = initial velocity of second objectInitially, 46.0 g marble moving at 2.10 m/s strikes a 28.0 g marble at rest.

Conservation of momentum: P_initial = P_final(46 g) (2.10 m/s) + (28 g) (0 m/s) = (46 g) v_final1 + (28 g) v_final2v_final1 + v_final2 = 1.48 m/s... equation (1)

Conservation of kinetic energy: KE_initial = KE_final(0.5) (46 g) (2.10 m/s)² + (0) = (0.5) (46 g) v_final1² + (0.5) (28 g)

v_final2²(46 g) (2.10 m/s)² = (46 g)

v_final1² + (28 g)

v_final2²(46/2) (2.10)² = (23) (v_final1)² + (14) (v_final2)²46.41 = 23 v_final1² + 14 v_final2²... equation (2)

Solve the equation (1) and (2) simultaneously to obtain the values of v_final1 and v_final2.

v_final1 + v_final2 = 1.48 m/s... equation (1)

46.41 = 23 v_final1² + 14 v_final2²... equation (2)

Now, multiply equation (1) by 14v_final1 + v_final2 = 1.48 m/s ... equation (1) (multiply by 14)

14 v_final1 + 14 v_final2 = 20.72... equation (3)

Use equation (2) and (3) to eliminate v_final2.

46.41 = 23 v_final1² + 14 v_final2²... equation (2)

14 v_final1 + 14 v_final2 = 20.72... equation (3)

Now, solve for v_final2 in equation (3).v_final2 = 1.48 - v_final1

Substitute v_final2 = 1.48 - v_final1 in equation (2).

46.41 = 23 v_final1² + 14 (1.48 - v_final1)²

46.41 = 23 v_final1² + 14 (2.1904 - 2.96 v_final1 + v_final1²)

46.41 = 23 v_final1² + 30.666 - 41.44 v_final1 + 14 v_final1²

46.41 = 37 v_final1² - 41.44 v_final1 + 30.6668.34 = 37 v_final1² - 41.44 v_final1 + 30.6660 = 37 v_final1² - 41.44 v_final1 + 22.666v_final1 = (-(-41.44) ± sqrt((-41.44)² - 4(37)(22.666))) / (2(37))v_final1 = 0.355 m/s or v_final1 = 0.998 m/s

Now, substitute the value of v_final1 in equation (1) and solve for v_final2.v_final1 + v_final2 = 1.48 m/sv_final2 = 1.48 - v_final1

Therefore, the speed of the first marble is 0.355 m/s and the speed of the second marble is 1.125 m/s immediately after the collision.

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The number of waves present in the picture is one wave

The wavelength of the wave is 5 cm

The frequency of the wave is the number of waves per second.

The period of the wave is the time taken for one complete wave oscillation.

The speed of the wave is the distance covered per second

The properties of a wave are the characteristics that are used to identify waves.

The properties of waves include:

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The distance from the central maximum for violet light is 0.0152 meters.

To find the distances from the central maximum for red and violet light, we can use the formula for the position of the m-th order fringe in a double-slit interference pattern:

y = mλL / d

where y is the distance from the central maximum, λ is the wavelength of light, L is the distance from the slits to the screen, d is the distance between the slits.

For red light with a wavelength of 700 nm (700 x 10^-9 m), substituting the values into the formula:

y_red = (1)(700 x 10^-9 m)(0.95 m) / (25 x 10^-6 m)

     ≈ 0.0266 m

Therefore, the distance from the central maximum for red light is approximately 0.0266 meters.

For violet light with a wavelength of 400 nm (400 x 10^-9 m), using the same formula:

y_violet = (1)(400 x 10^-9 m)(0.95 m) / (25 x 10^-6 m)

        ≈ 0.0152 m

Hence, the distance from the central maximum for violet light is approximately 0.0152 meters.

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Answer:

The name given to the underwater mountains in the middle of oceans is;

Mid-ocean ridges

Explanation:

Mid-ocean ridges, also known as mid-oceanic ridge is a mountain range made by plate tectonics under the water.

The magma created at a divergent boundary where two tectonic plates meet due to the rise of convection currents in the Earth's mantle which is beneath the oceanic crust results in the uplifting of the ocean floor.

Calculate the velocity(v) at the bottom of hill.

As we know ,

\( \bf\: Kinetic \: energy = \dfrac{1}{2} \times m \times {v}^{2} \)

\( \red \bigstar \bf \: putting \: the \: values\)

\( \rightarrow \: 25 = \dfrac{1}{2} \times 2 \times {v}^{2} \)

\( \rightarrow \: 25 \times 2 = 1 \times 2 \times {v}^{2} \)

\( \rightarrow \: 50 = 2 \times {v}^{2} \)

\( \rightarrow \: {v}^{2} = \cancel \dfrac{50}{2} \)

\( \rightarrow \: {v}^{2} = 25\)

\( \rightarrow \: v = \sqrt{25} \)

\( \rightarrow \: v = 5 \: m {s}^{ - 1} \)

The focal length of the lens when the object is at 36 cm from the lens on the left and the image is at 22cm towards the right is 13.6 cm.

In optics, the relationship between the distance of the image (v), the distance of the object (u), and the focal length (f) of the lens are given by the formula known as the Lens formula. The Lens formula is applicable for convex as well as concave lenses. These lenses have negligible thickness.

The position of the object,u= 36cm to the left of the lens.

The position of the image, v= 22 cm to the right of the lens.

According to the sign convention, if we take the direction in which the ray of light goes as the positive direction. Then u=-36cm and v=+22cm.

Now from the lens formula, 1/f=1/v-1/u, 1/f= 1/22-(-1/36), 1/f= 1/22+1/36=(36+22)/36×22 =58/792. f= 792/58 = 13.6 cm.

The focal length of the lens is 13.6cm.

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To find the electric potential energy of a 4.0-μC charge at a point with an electric potential of 20 V, you can use the following formula:

Electric Potential Energy (EPE) = Charge (Q) × Electric Potential (V)

In this case, Q = 4.0 μC and V = 20 V.

Remember to convert the charge to coulombs by multiplying by \(10^-6\):

Q = 4.0 ×\(10^-6\)

Now, plug in the values:

EPE = (4.0 × 1\(10^-6\) C) × (20 V)

EPE = 8 ×\(10^-5\) J (joules)

So, the electric potential energy of the 4.0-μC charge at that point is 8 × \(10^-5\) joules.

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