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44. Two wave pulses are traveling along a string
toward each other as represented in the diagram
below.

(D is interference)

Answer:

Because they travel by interacting within other particles.  

Explanation:

Sound cannot travel in a vacuum, sound waves need to interact with other particles in order to be carried and this makes sound waves a mechanical wave.

Answer:

hopr

Explanation:

Answer:

How do u delete your questions on this app

Answer:

27.5

Explanation:

KE=1/2m(v)^2

⭐Air Resistance is the factor, which limits the speed of an object falling through the air...⭐

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Answer:

h = 4T/dgr

Explanation:

Using Laplace law for spherical bubble, the pressure difference P'- P = 4T/r where T = surface tension and r = radius of sphere.

Now, the pressure difference on the hollow sphere P' - P = dgh where d = density of liquid, g = acceleration due to gravity and h = maximum depth to which sphere must be immersed.  

So dgh = 4T/r

h = 4T/dgr

Answer:

Explanation:

Use kinematics equations

You have Vi=10m/s and Vf=50m/s and t=2s

Use equation Vf=Vo+at      50=10+a(2)

50=10+2a

40=2a

a=20 m/s^2

Awnswer:

what are the answer chosices

Explanation:

Answer:

i do not know man

Explanation:

lol

The angular acceleration of the washing machine spin is 53.5 x 10⁻³.

Angular acceleration is defined as the time rate of change of angular velocity in a circular motion.

Here,

Initial angular velocity, ω₁ = 20 rad/s

Final angular velocity, ω₂ = 8 rad/s

Angular displacement, θ = 2[tex]\pi[/tex] x no. of revolutions

θ = 2[tex]\pi[/tex] x 500 = 1000[tex]\pi[/tex]

a) Using the equation of circular motion,

ω₂² - ω₁² = 2αθ

Therefore, the angular acceleration,

α = (ω₂² - ω₁²)/2θ

α = (20² - 8²)/2 x 1000[tex]\pi[/tex]

α = 53.5 x 10⁻³ rad/s²

b) Time taken by the machine spin to slow down,

t = (ω₂ - ω₁)/α

t = (20 - 8)/53.5 x 10⁻³

t = 224.2 s

Hence,

a) The angular acceleration of the washing machine spin is 53.5 x 10⁻³.

b) Time taken by the washing machine spin to slow down is 224.2 s.

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Answer:

option f) all of the above

We will see that all of the given options would increase the momentum, so the correct option is f "all of the above"

Momentum is defined as the amount of motion, and it is given by:

P = m*v

Where m is the mass of the object and v is the velocity.

We can't change the mass of the golf ball, but we can change the velocity, and to do it, we need to increase the acceleration that we apply to the ball.

To increase the acceleration we can:

Then all the options are correct, which means that the correct option is f.

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Answer:

I started answering this before everything was erases, but briefly

W = 1/2 K x^2     so K = 2 W / x^2 = 6 * 25 = 150

Also F = - K X = 150 * 1/5 = 30 N at max extension

m = F / a = 30 /15 = 2 kg

Since max extension occurs at t = 0 you can write

x = A sin ω t

v = ω A cos ω t

a = -ω^2 A sin ω t            note that there is no phase angle here

Also at .1 compression

.1 = .2 sin ω t     and sin ω t = 1/2    and ω t = 30 deg = pi / 6

Substiture these values above to get velocity and acceleration when

ω t = 30 deg

Answer:

2. 3.1415 m/s

3. 0.63m

4. 0.006 m/s^2

Explanation:

2. v=(2*pi*r))/T, put in values and solve.

3. Circumference=2*pi*radius, radius is 0.1m, plug in and solve.

4. a=(v^2)/r, (don't worry about converting to meters, since units are the same in kilometers, they will cancel out) plug in values and solve.

That's it!

The rare disorder that includes the inability to feel pain is called Congenital analgesia. That is option B.

Congenital analgesia is defined as ,the name implies, a genetic disorder that rarely occurs which makes one not to be able to feel pain.

It is an autosomal recessive disorder in which there is genetic changes in the PMRD12 gene.

Therefore, the rare disorder that includes the inability to feel pain is called Congenital analgesia.

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Answer:

about 2000 klm per min

Explanation:

Answer:

B

Explanation:

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Answer:

C option is correct

Explanation:

C) because the first energy level only holds two electrons.

Answer:

power=44.1 watts

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As an acorn falls from a tree toward the ground, gravitational potential energy is converted into kinetic energy.

To find the correct option among all the options, we need to know about the conversation of energy.

Thus, we can conclude that option (d) is correct.

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Answer:

myself tbh

Explanation:

hope this helps

Answer: Depression and myself, love life

Explanation:

Answer:

D. 5000W

Explanation:

Given the following data;

Force = 2000N

Distance = 2m

Time = 0.8s

To find the power;

First of all, we would determine the workdone by the weightlifter

Workdone = force * distance

Workdone = 2000 * 2

Workdone = 4000N

Now, we can find the power using the formula;

Power = workdone/time

Substituting into the equation, we have

Power = 4000/0.8

Power = 5000 Watts

Answer:

When an apple falls from the tree to the ground, its energy of position (stored as gravitational potential energy) is converted to kinetic energy, the energy of motion, as it falls. When the apple hits the ground, kinetic energy is transformed into heat energy.

Answer:

To maintain enough time to prevent a collision, a system operating in air traffic where aircraft speed does not

fall below 100 km/h (most medium-sized UAVs and GA aircraft) will need to be able to detect obstacles which

subtend an arc-width of as small as 0.125 mra

Answer:

yes it does exert a force, it pushes it up

Explanation:

this is called normal force

if it didn't exert a force the book would keep going down

according to newton every force has an equal amd opposite reaction

so the book exerts a force on the table and vice versa

hope this helped

Explanation:

Solids have closely packed particles and vibrate about a fixed position, they also have a fixed volume.

liquid have close particles but which are able to move with a bit of kinetic energy, for this reason they have no fixed volume but take the volume of the container or vessel

Answer:

I can't really see it sorry

Answer:

Schwarzschild radius is the radius of the boundary of a hole of this type.

its false rock is at edge