A trombone acts as if it were an
open pipe of length 2.96 m. What
is the frequency of its fourth
harmonic?
(Speed of sound
343 m/s)
(Unit = Hz)

The work done  is the product of the force and resulted displacement. The frictional force between the box and floor is 119.5 N.

Force is external factor acting on a body to make a change in the state of an object . According to Newton's second law of motion, force is the product of mass and acceleration.

The work done in physics is the product of force acting on a body and its displacement. Therefore, the force which result in a displacement of the body is said to be work done on the object.

Here, the work done by frictional force is 550 J and displacement is 4.6 m.

Therefore, the force = work done / displacement

                                  = 550 J/ 4.6 m

                                  = 119.5 N.

Hence, the force between the floor and box will be 119.5 N.

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Answer:

They are gaining energy, can move and slide past each other.

Explanation:

Because as ice melts, the molocules gain energy/heat which warm them up and are able to slide/move apart from each other.

Answer:

Glowing

Explanation:

Answer: Transverse

Explanation: Transverse waves possess a vertical wave motion and a horizontal particle motion.

Answer:

5.6mls

Explanation:

Answer:

The correct answer is A volts on edge 2021

Explanation:

Answer:

The Principle of Progression

(I searched it up since I never learned this)

Explanation:

The principle of progression states that a person should start slowly and increase exercise gradually. Since Mandy is just getting started on her exercise routine, she should begin with a few workouts over a large span of time, then work her way up so she can do more workouts in a shorter span of time.

Answer:

-4 m/s^2

Explanation:

v=vo+at

0=40+a(10)

-40=a(10)

-4=a

Answer:

the final velocity of the two blobs after collision is 3.21 m/s.

Explanation:

Given;

mass of first blob, m₁ = 9 kg

mass of the second blob, m₂ = 5 kg

initial velocity of the first blob, u₁ = 5 m/s

initial velocity of the second blob, u₂ = 0

Let the final velocity of the two blobs after collision = v

Apply the principle of conservation linear momentum to determine v;

m₁u₁ + m₂u₂ = v(m₁ + m₂)

9 x 5   +    5 x 0 = v(9 + 5)

45 = 14v

v = 45 / 14

v = 3.21 m/s

Therefore, the final velocity of the two blobs after collision is 3.21 m/s.

Answer:

---

Explanation:

Force is like the amount of push

Motion is the result of Push

Answer: in an electrical circuit, electricity flows one direction: out of the positive terminal of a battery and back into the negative terminal.

Explanation:

Answer:

one direction: out of the positive terminal of a battery and back into the negative terminal.

Explanation:

Electrical engineers say that, in an electrical circuit, electricity flows one direction: out of the positive terminal of a battery and back into the negative terminal. Electronic technicians say that electricity flows the other direction: out of the negative terminal of a battery and back into the positive terminal.

Answer:

102.04kg

Explanation:

(1000kg*m/s^2)/(9.8 m/s^2)

Answer:

W = 1.11 N

Explanation:

Given that,

Mass of a table, m = 0.44 kg

It is pushed against an inclined surface with a 15 inclination angle.

We need to find the amount of the horizontal component of the weight. The horizontal component of weight is given by :

[tex]W=mg\sin\theta\\\\W=0.44\times 9.8\times \sin(15)\\\\W=1.11\ N[/tex]

So, the amount of the horizontal component of the weight is 1.11 N.

Answer:

Primero, sabemos que la densidad de el oro es:

Densidad =  19.3 g/cm^3

Sabemos que nuestro metal tiene una masa de 0.75 kg, y un volumen de 340 cm^3.

Primero deberíamos reescribir la masa en gramos, pues la densidad está escrita en gramos.

Sabemos que:

1 kg = 1000g

Entonces:

0.75 kg es 0.75 veces 1000g, esto nos da:

0.75kg = 0.75*(1000g) = 750g

Entonces tenemos:

masa = 750g

volumen = 340cm^3

Ahora debemos recordar que:

densidad = masa/volumen

Entonces la densidad de este metal es:

densidad = 750g/340cm^3 = 2.21 g/cm^3

Si la comparamos con la densidad del oro, podemos ver que esta es mayor.

Entonces podemos concluir que este metal no es oro.

Answer:

water

is missing in above equation

hope it helps

Answer:

the energy absorbed is 4.477 x 10⁶ J

Explanation:

mass of the liquid, m = 13 kg

initial temperature of the liquid, t₁ = 18 ⁰C

final temperature of the liquid, t₂ = 100 ⁰C

specific heat capacity of water, c = 4,200 J/kg⁰C

The energy absorbed is calculated as;

H = mcΔt

H = mc(t₂ - t₁)

H = 13 x 4,200(100 - 18)

H = 4.477 x 10⁶ J

Therefore, the energy absorbed is 4.477 x 10⁶ J

Answer:

x) KE and GPE

y) Only GPE

z) Only KE

Explanation:

From the diagram, we have;

1) At point X, the gall is at an elevation higher than the thrower, therefore, the ) ball has (gravitational) potential energy, GPE, because it can fall  to a lower level unassisted from the height it was thrown

And the ball is also in upward motion, with which it reaches the height 'Y', therefore, the ball has kinetic energy, KE, to move higher

2) At point 'Y' which is the maximum height, the ball no longer moves upwards and momentarily, the ball has no vertical motion, therefore, the ball has only energy due to height, which is the gravitational potential energy, GPE

3) At the point Z, at the instant just before the ball touches the ground, the elevation of the ball above the ground is small, while the velocity of the ball is close to maximum velocity, therefore, the ball has Only kinetic energy, KE

Answer: 1964000 Joules

Explanation:

PE = mgh

Answer:

Water pressure P=ρgh  (density X acceleration due to gravity X height of water)

                      P=1000X9.8x3=29,400 N/m2  or Pascal

But there is air pressure over water which also adds to the pressure at the bottom of the pool.

Therefore,Atmospheric pressure over the water=1.01 x 105 N/m2

So the total pressure on the bottom of the pool = 29,400+ 101000 Pa

                                                                    = 130,400 Pa

Explanation:

Answer:

The statement which best explains the difference between the light waves travelling through a vaccuum and light waves travelling through a medium  is -"When light waves travel through a vacuum, they travel faster than when they travel through a medium."

Explanation:

Light waves are faster in vacuum because The refractive index of vacuum is the lowest since there is no barrier in the way of light propagation in vacuum. Demonstrate that the maximum speed of light in vacuum.

In a vacuum, light flies at 186,283 mph. Light flies at 186,200 mph in the air, or 56 mph slower. In another medium, such as water, light travels at 139,712 mph, or around 3/4 of the speed of light in a vacuum.

LIGHT WAVES -: Light waves are a form of electromagnetic wave that includes both visible and invisible to the naked eye wavelengths on the electromagnetic spectrum. The average human eye can see light with wavelengths ranging from 390 to 700 nanometers, or nm.

Forms of light waves comprises of Radio waves , microwaves , infrared waves , visible light etc.

When light waves travel through a vaccume, they travel faster than when they travel through a medium

A light wave is an electromagnetic wave which travels through the vacuum of outer space. Light waves are produced by vibrating electric charges., An electromagnetic wave is a transverse wave which has both an electric and a magnetic component.

Light waves are faster in vaccum because the refractive index of vaccume is the lowest since there is no barrier in the maximum speed of light in vaccum.

In vaccum light travels at 186283 mph in air 186200 mph in other medium like water at 139712 mph.

Hence  light waves travel through a vaccum, they travel faster than when they travel through a medium

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Answer: concentration c = 25.2 g /(41.99 g/mol × 0.75 l)

Explanation: M(NaF) = 41.99 g/mol and amount of substance n = m/M.

Concentration c = n/V

What is the molarity (concentration) of 25.2 grams of NaF dissolved in a total volume of 0.75 liters is 0.8 mol/liter.

What is Molarity ?

Molarity shows the concentration of solute in the given solution. It is defined as no. of moles of solute present in 1 liter of solution. It is denoted by M. its SI unit is mol/L.

Hence, molarity is given by,

Molarity = No. of moles of solute ÷ Volume of the solution in liters

Given,

mass of NaF = 25.2 g

Volume of the solution = 0.75 liters

Molarity = ?

Let's find No. of moles of the solute.

NaF has one Na and one F.

Molar mass of NaF is,

Na = 22.98*1 = 22.98

F = 18.99*1 = 18.99

Molar mass of NaF is 22.98+18.99= 41.97 g/mol

No. of moles of the solute is,

25.2g of NaF × (1÷41.97 ) mol/g = 0.6 mol.

Molarity of NaF is,

Molarity = No. of moles of solute ÷ Volume of the solution in liters

M = 0.6 mol ÷ 0.75 liters

M = 0.8 mol/liter

Hence molarity of NaF is 0.8 mol/liter.

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Answer:

164.87 J

Explanation:

From the question,

Work done (W) = mghcosθ........................ Equation 1

Where m = mass of the box, h = height, g = acceleration due to gravity, θ = angle to the vertical

Given: m = 25 kg, h = 2.6 meters, θ = 75°.

Constant: g = 9.8 m/s²

Substitute these value into equation 1

W = 25×9.8×2.6×cos75°

W = 164.87 J.

Answer:

1=900j

2=140j

3=5m

Explanation:

1,

work=force×displacement

w=450×2

w=900j

2,

w=f×s

w=70×2

w=140j

3,

w=f×s

200=40×s

200/40=s

s=5m

Answer:

An invisible force that pulls objects toward each other. Earth's gravity is what keeps you on the ground and what makes things fall. ... Gravity also gets weaker with distance. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass.

Explanation:

thx for the points :)

Answer:

gravity is the force that attracts a body toward the center of the earth or toward any other physical body having mass.

Explanation: