what is it called when I sound waves slowed buy a new medium
1.echo
2.transmission
3.absorption
4.reflection

Answer:

Period of motion is approximately 0.5447  seconds

Explanation:

We start by calculating the constant "k" of the spring which can be derived from the fact that an object of mass 12 g produced a stretch of 3.4 cm: (we write everything in SI units)

F = k * x

0.012 kg * 9.8  m/s^2 = k 0.034 m

k = 0.012 kg * 9.8  m/s^2 / (0.034 m)

k = 3.46 N/m

now we use the formula for the period (T) of a spring of constant k with a hanging mass 'm':

\(T=2\pi\,\sqrt{\frac{m}{k} }\)

which in our case becomes:

\(T=2\pi\,\sqrt{\frac{0.026}{3.46} } \approx 0.5447\,\,sec\)

US President Biden signed an agreement to end the national emergency of COVID-19 in advance, but it was strongly opposed by the White House spokesman.

The new coronavirus SARS-CoV-2 is the cause of the extremely contagious disease COVID-19. The virus was discovered for the first time in Wuhan, China, in December 2019, and it spread fast over the world, causing a pandemic. When an infected person coughs, sneezes, or talks, respiratory droplets from their mouth or nose are the main means of disease transmission.

On April 10, 2023, President Biden approved legislation written by Republicans that put an end to the COVID-19 pandemic's state of emergency. Notwithstanding the fact that the White House intended to stop making emergency declarations on May 11, the GOP's proposed legislation received some bipartisan support in Congress. The measure, according to the White House, "would generate widespread turmoil and uncertainty throughout the health care system – for states, for hospitals and doctor's offices, and, most crucially, for tens of millions of Americans," A White House representative, however, downplayed the significance of the law, stating that the end of the emergency "does not affect our ability to wind down authorities in an orderly manner."

A White House representative later minimized the bill's effects, saying they would not have an impact on the scheduled wind-down of authority on May 11.

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Answer:

150 N.

Explanation:

Here are the steps on how to calculate the magnitude of the frictional force on the child:

1. Identify the known and unknown quantities.

Given:

* Mass of the child, m = 30 kg

* Angle of the slide, θ = 40°

* Acceleration of the child, a = 1.3 m/s2

Unknown:

* Magnitude of the frictional force, Ff

2. Draw a free-body diagram of the child.

A free-body diagram is a diagram that shows all the forces acting on an object. In this case, the forces acting on the child are the force of gravity, the normal force, and the frictional force. Attachment

3. Apply Newton's second law to the child.

Newton's second law states that the net force acting on an object is equal to the mass of the object times its acceleration. In this case, the net force is the difference between the force of gravity and the frictional force.

Fnet = mg Sin(∅) - Ff

4. Substitute the known values into the equation.

mgSin(∅) - Ff = ma

(30 kg)(9.8 m/s^2) Sin40º-Ff = (30 kg)(1.3 m/s^2)

189 N -Ff = -39 N

5. Solve for the magnitude of the frictional force.

Ff = -39 N-189 N

|Ff| = 150 N

Therefore, the magnitude of the frictional force on the child is 150 N.

The frictional force is acting in the opposite direction of the child's motion, so it is slowing her down.

Answer:

Here Solved :

Explanation:

horizontal component of acceleration due to gravity is balanced by centrifugal force and the net force acting on a body that will ma and hence

Mgsin40 - Frictional force = Ma

Answer:

1.199km/h towards west

2.17km/h towards upstream direction

3.702km/h towards east

4.2km/h towards downstream direction

5.a.149km/h towards east

   b.1043km

Explanation:

1.V p,e = Vp,w + Vw,e

           = 211km/h-12km/h

           =199km/h towards west

2. Vb,o=Vb,r+Vr,o

    Vb,o=22-5km/h

          =17km/h towards upstream direction

3.Vj,w= Vj,e + Ve,w

   Vj,w = 740-38km/h

          = 702km/h towards east

4.Vk,r= Vk,e+ Ve,r

   Vk,r=33 - 31km/h

        =2km/h towards downstream direction

5.a.Vp,e=Vp,w +Vw,e

      Vp,e=216-67km/h

          =149km/h towards east

b. distance =speed * time

                 = 149km/h * 7h

                 =1043km

[V p,e-velocity of plane relative to earth(ground)]

[p-plane ,w-wind ,e-earth, b-boat, r-river, o-object, j-jet, k-kayaker,]

Answer:

150 J

Explanation:

Moving 3 times higher will increase the   P E  x 3   = 150 J

The average distance from mars to the sun if Mars had an orbital period of 1.88 years is 2.27 * \(10^{8}\) km

P² = a³

P = Orbital period

a = Average distance

P = 1.88 years

a³ = 1.88²

a³ = 3.53

a = 1.52 AU

a = 1.52 * 1.496 * \(10^{8}\) km

a = 2.27 * \(10^{8}\) km

The formula used to solve the given problem is derived from Kepler's third law of planetary motion. AU is the abbreviated from of Astronomical unit. 1 AU = 1.496 * \(10^{8}\) km

Therefore, the average distance from mars to the sun is 2.27 * \(10^{8}\) km

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8 minutes and 20 second is the time it takes to reach earth.

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The work-energy theorem states that the change in the kinetic energy of an object will be equal to the net work done on the object.

Mathematically, it can be expressed as;

ΔKE = W

Where; ΔKE represents the change in kinetic energy of the object,

W represents the net work done on the object.

This theorem states that when work is done on an object, it results in a change in its kinetic energy. If work is done on an object, its kinetic energy increases, and if work is done by an object, its kinetic energy decreases.

This theorem is a fundamental principle in physics that relates the concepts of work and energy, and it is often used to analyze the motion and behavior of objects in various physical systems.

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Answer & Explanation: Waste management are all activities and actions required to manage waste from its inception to its final disposal. There are several methods of managing waste with its strengths and weaknesses. The strengths include;

* It creates employment

* It keeps the environment clean

* The practice is highly lucrative

* It saves the earth and conserves energy

The weaknesses of the methods of waste management includes;

* The sites are often dangerous

* The process is mostly

* There is a need for global buy-in

* The resultant product had a short life

Answer:

D.

Explanation:

Answer:

A. underwater mountain ranges are very common

Explanation:

got it right on the quiz

Answer:

I'm pretty sure it's A

Explanation:

bc the crest is is the point on the wave

There is more to the Earth than what we can see on the surface. In fact, if you were able to hold the Earth in your hand and slice it in half, you'd see that it has multiple layers. But of course, the interior of our world continues to hold some mysteries for us. Even as we intrepidly explore other worlds and deploy satellites into orbit, the inner recesses of our planet remains off limit from us.

However, advances in seismology have allowed us to learn a great deal about the Earth and the many layers that make it up. Each layer has its own properties, composition, and characteristics that affects many of the key processes of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core. Let's take a look at them and see what they have going on.

Like all terrestrial planets, the Earth's interior is differentiated. This means that its internal structure consists of layers, arranged like the skin of an onion. Peel back one, and you find another, distinguished from the last by its chemical and geological properties, as well as vast differences in temperature and pressure.

Explanation:

Net charge /2

Q1 = 3 C

Q2= -1 C

Net charge = Q1 +Q2= 3 + (-1) = 2 C

2C/2 = 1C

Answer: +1C (option a )

The change in momentum of Kara's car is -1.43 × 10⁴ kg.m/s, the magnitude of force is -1.021 × 10⁵ N.

Force is the external agent which causes the motion of an object or it is the resistant which makes the object come at rest from motion. It is a vector quantity, because it has both the magnitude and direction.

Mass of Kara's car = 1300 Kg

moving with speed = 11 m/s

time taken to stop = 0.14 s

final velocity = 0 m/s

distance between Lisa ford and Kara's car = 30 m

a) change in momentum of Kara's car

Δ P = m Δ v          

Δ P = m(vf - vi)

Δ P = 1300 (0 - 11)

Δ P = -1.43 × 10⁴ kg.m/s

The impulse is equal to the change in momentum of the car

I = -1.43 × 10⁴ kg.m/s

Magnitude of the force experienced by Kara

I = F × t

where, I is impulse acting on the car

t is time

- 1.43 × 10⁴ = F × 0.14

F = -1.021 × 10⁵ N

Negative sign represents the direction of the force.

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Your question is incomplete, most probably the complete question is:

Kara Less was applying her makeup when she drove into South's busy parking lot last Friday morning. Unaware that Lisa Ford was stopped in her lane 30 feet ahead, Kara rear-ended Lisa's rented Taurus. Kara's 1300-kg car was moving at 11 m/s and stopped in 0.14 seconds.

a. Determine the momentum change of Kara's car.

b. Determine the impulse experienced by Kara's car.

c. Determine the magnitude of the force experienced by Kara's car.

Answer:

it is double the temperature change of iron

The rock comes to a complete stop at maximum height, so velocity is zero. Gravity is responsible for the acceleration. As a result, at the top of its path, its velocity is zero and its acceleration is 9.81 m/s2, which is approximately 10 m/s2.

When an object thrown straight upwards gets to the top of its path, Its velocity is zero because it moves opposite to gravity and acceleration is 10 m/s2 , due to the rate of change of velocity of an object with respect to time.

Projectile motion is the movement of an object in which the vertical acceleration is g and the horizontal acceleration is zero. A projectile motion is used to throw a stone into the air. It rises against a deceleration of size g, which slows it down until it reaches the maximum height.

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Pipe of constant radius, we can use Bernoulli's equation, which relates the pressure, velocity, and height of a fluid at two points in a flow system.the pressure of water in the pipe is approximately 105,142 Pa.

System refers to a collection of related components or parts that work together to achieve a specific goal or purpose. The concept of a system can be applied to a wide range of fields and disciplines, including science, engineering, economics, and social sciences.

In science, a system is often defined as a portion of the universe that is being studied or analyzed. This can include anything from a single atom or molecule to an entire ecosystem or planet. By defining the boundaries of a system, scientists can focus their attention on understanding the interactions and relationships between the various components within that system.

In engineering, a system refers to a collection of components that are designed to work together to perform a specific function or task. This can include everything from simple mechanical systems like gears and pulleys to complex electrical or computer systems.

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Answer:

The answer is D. displacement

Explanation:

The electron number cannot be used instead because electrons can be removed from or added to an atom (option C)

The element of an atom is determined by its proton count, while the electron count can exhibit variability. Take, for instance, a sodium atom, which encompasses 11 protons and 11 electrons. However, it has the capacity to relinquish one electron, transforming into a sodium ion housing only 10 electrons.

This occurs due to the relatively loose binding of electrons to the nucleus, enabling their removal through the influence of an electric field or alternative mechanisms.

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Answer:

36 kmp or 22.37 mph

The distance between the stop signs is 138.7 m. The car moves with acceleration and constantly.

A car starts from rest at a stop sign. It accelerates at 2.0 m/s² for 6.9 s, coasts for 2.0 s, and then slows down at a rate of 1.5 m/s² for the next stop sign.

Determine the distance between the stop signs!

In this case, there are three conditions. The car is accelerated, moving constantly, and decelerated.

When the car is accelerated from rest, the distance is

x₁ = v₀t + ½ at²

x₁ = 0 + ½ (2.0)(6.9)²

x₁ = 1.0(47.61)

x₁ = 47.6 m

At t = 6.9 seconds, it reach the velocity of

v₁ = v₀ + at

v₁ = 0 + (2.0)(6.9)

v₁ = 13.8 m/s

When the car is moving constantly at 13.8 m/s, the distance is

x₂ = vt

x₂ = 13.8(2.0)

x₂ = 27.6 m

When the car is decelerated to a stop, the distance is

v₁² = v₀² - 2ax₃

0 = 13.8² - 2(1.5)x₃

190.44 = 3x₃

x₃ = 190.44/3

x₃ = 63.5 m

The total distance traveled will be

= x₁ + x₂ + x₃

= 47.6 + 27.6 + 63.5

= 138.7 m

Hence, the stop signs has a distance of 138.7 m.

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Answer:

Computer Model May Help to More Accurately Predict Volcano Eruptions. Scientists at the GFZ German Research Center in Potsdam, Germany, have developed a computer model which they say boosts the accuracy of volcanic eruption prediction.

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According to the information, the rms speed of the gas will remain unchanged.

The rms (root-mean-square) speed of a gas is directly proportional to the square root of its temperature. In this scenario, the temperature is constant, which means that the rms speed of the gas will also remain constant.

The change in volume does not have a direct effect on the rms speed of the gas, as long as the temperature remains unchanged. Therefore, the rms speed of the gas in the vessel will not change.

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Answer:

B. Super-Positioned

Explanation:

Answer:

Part A: \(1.97ms^{-1}\) (2 s.f.)
Part B: 0.33m (2 s.f.)

Explanation:

Part A:

Frequency = \(\frac{1}{period} = \frac{1}{3}\) Hz

Wavespeed = frequency x wavelength
Wavelength = distance between two crests = 5.90

Freq = 1/3 Hz

Therefore: Wavespeed = 1/3 x 5.90

                  Wavespeed = 1.967 ms^-1

Part B:
Amplitude = \(\frac{peak-to-peak- amplitude }{2}\)

Peak to peak amplitude = 0.65m

Amplitude = 0.65/2 = 0.325m = 0.33m 2sf

Answer:

A)

Explanation:

This is because the longer the wire is, the more resistance there is for the electricity to run through.

The student can increase the resistance by replacing the wire with one that is longer. Thus, option A is correct.

The voltage across a conductor, according to Ohm's law, is precisely proportional to the current that passes through it.

A wire's resistance is inversely correlated with its cross-sectional area and directly correlated with its length. Most conductors have a resistance to the flow of an electric current through them. As the wire's length increases, the resistance in the wire rises.

However, according to Ohms law V=IR, a wire's length increases its resistance while decreasing its current for a given potential difference (voltage).

Therefore, replacing the wire with a longer one will increase resistance if a student plans to modify a circuit.

Thus, option A is correct.

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The minimum mass required to be placed on the 0.00 cm mark of the meter stick to maintain equilibrium is 0.120 kg.

To maintain equilibrium, the torques acting on the meter stick must balance each other. The torque is given by the formula:

τ = r * F * sin(θ)

where τ is the torque, r is the distance from the pivot point to the point where the force is applied, F is the force applied, and θ is the angle between the force vector and the lever arm.

In this case, the meter stick is in equilibrium when the torques on both sides of the pivot point cancel each other out. The torque due to the weight of the meter stick itself is acting at the center of mass of the meter stick, which is at the 50.0 cm mark.

Let's denote the mass to be placed on the 0.00 cm mark as M. The torque due to the weight of M can be calculated as:

τ_M = r_M * F_M * sin(θ)

where r_M is the distance from the pivot point to the 0.00 cm mark (which is 30.0 cm), F_M is the weight of M, and θ is the angle between the weight vector and the lever arm.

Since the system is in equilibrium, the torques on both sides of the pivot point must be equal:

τ_M = τ_stick

r_M * F_M * sin(θ) = r_stick * F_stick * sin(θ)

Substituting the given values:

30.0 cm * F_M = 20.0 cm * (0.0400 kg * 9.8 m/s^2)

Solving for F_M:

F_M = (20.0 cm / 30.0 cm) * (0.0400 kg * 9.8 m/s^2)

F_M = 0.0264 kg * 9.8 m/s^2

F_M = 0.25872 N

Finally, we can convert the force into mass using the formula:

F = m * g

0.25872 N = M * 9.8 m/s^2

M = 0.0264 kg

Therefore, the minimum mass required to be placed on the 0.00 cm mark of the meter stick to maintain equilibrium is 0.120 kg.

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Friction is a force that opposes the relative motion of two surfaces in contact. It exists when the surfaces of two bodies are in contact.The answers to the given questions are:

1. See attachment to this answer

2. a = 3.63 m/\(s^{2}\)

3. μ = 0.36

Friction is an oppositional force between the surfaces of two bodies in contact, and tries to limit the motion of one body over the other. It is dependent on the nature of the surfaces in contact.

From the given question;

1. The free body diagram for this question is herewith attached to this answer.

Given that: \(F_{1}\) = 50 N, \(F_{2}\) = 15 N, \(F_{3}\) = 6 N, and m = 8 kg.

2. The acceleration of the body can be determined by:

F = ma

where F is the total force acting on the body, m is the mass of the body and a is its acceleration.

So that;

a = \(\frac{F}{m}\)

The total force on the body is;

F = \(F_{1}\) - (\(F_{2}\) + \(F_{3}\))

  = 50 - (15 + 6)

  = 50 - 21

F = 29 N

Then;

a = \(\frac{29}{8}\)

  = 3.625

a = 3.63 m/\(s^{2}\)

The acceleration of the body is 3.63 m/\(s^{2}\).

3. The coefficient of limiting friction (μ) between the surfaces is:

μ = \(\frac{Force}{Reaction}\)

Force = 29 N

Reaction = mg

               = 8 x 10

               = 80 N

μ = \(\frac{29}{80}\)

   = 0.3625

μ = 0.36

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Answer:

Friction is a force that opposes the relative motion of two surfaces in contact. It exists when the surfaces of two bodies are in contact.The answers to the given questions are:

1. See attachment to this answer

2. a = 3.63 m/

3. μ = 0.36

Explanation: