a set of waves has a frequency of 28 hz and a speed of 7 m/s. what is the wavelength of the waves in meters?

The initial speed of the bullet is 200 m/s.

Conservation of momentum is a law of physics which states that the total momentum of a system remains constant over time. This means that when two or more objects interact, the total momentum of the system remains the same before and after the interaction. The law of conservation of momentum is applicable to both isolated systems and systems that interact with external forces. It is an important concept in a variety of applications ranging from collisions of particles to the motion of galaxies. Conservation of momentum also plays an important role in the field of quantum mechanics.

The initial speed of the bullet can be calculated using the conservation of momentum equation:
m₁v₁ + m₂v₂ = m₁v′₁ + m₂v′₂

where m₁ is the mass of the bullet, v₁ is the initial speed of the bullet, m₂ is the mass of the pendulum, v₂ is the initial speed of the pendulum, v′₁ is the final speed of the bullet, and v′₂ is the final speed of the pendulum.
In this problem, m₁ = 7.0 g, v₁ = ?, m₂ = 1.5 kg, v₂ = 0 m/s, v′₁ = 200 m/s, and v′₁ = 0 m/s.
Substituting this into the equation, we get:
7.0 g x v₁ + (1.5 kg)(0 m/s) = 7.0 g(200 m/s) + (1.5 kg)(0 m/s)
Solving for v₁, we get:
v₁ = 200 m/s
Therefore, the initial speed of the bullet is 200 m/s.

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Answer:

5920 cm

Explanation:

1 hm = 100m

1 m = 100cm

1 hm = 100×100cm = 10000 cm

0.592 hm = 0.592×10000cm = 5920 cm

Good luck !

The distance is 0.0013.4 mm

For dark fringe is 4,0

light of wavelength 460 nm

slits spaced 0.3 mm.

\($y=\frac{D}{d}(2 n-1) \frac{\lambda}{2}$$\)

For First dark fringe put n=1

For third dark fringe put n=3

\($\begin{aligned}& y_1=\frac{D \lambda}{d 2} \\& y_3-y_1=\frac{5 D \lambda}{2 d}-\frac{D \lambda}{2 d}=\frac{5 D \lambda}{2 d} \\& \Delta y=\frac{2 D D \lambda}{2 d} \\& L_1 \mathrm{~mm}=\frac{2 \times D \times 460 \mathrm{~nm}}{0.3 \mathrm{~mm}} \\& D=\frac{4 \times 0.3}{2 \times 460} \mathrm{~mm}=0.001304 \mathrm{~mm}\end{aligned}$$\)

Therefore, the distance from the slits to the screen is 0.001304 mm.

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Int this setup of YDSE distance from the slits to the screen is 1.739 m

As we all know from the young's double slit experiment the position of n(th) dark fringe width is given by

\(y=(n+\frac{1}{2} )\)λ\(\frac{D}{d}\)

here, y= position of minima on the screen

n= no. of minima

D= slit- screen separation

d= slit width

λ= wavelength of light used

Given,

λ= 460nm= 460×10⁻⁹ m

Δy= 4×10⁻³ m

d= 0.3mm= 0.3×10⁻³ m

According to question, y₃-y₁= Δy= 4×10⁻³ m

For first dark fringe n=0

For third dark fringe n=2

On putting all the values and solving we get

D= 1.739m

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Answer:

Explanation:

in a radio telescope, the role that the mirror plays in visible-light telescopes is played by:

✘ O a. a spectrometer

✘ O b. an interferometer

✘ O c. a special kind of lens

✘ O d. computer software

Have a Nice Best Day : )

Answer:

3×10^6

Explanation:

frequency is the speed of light ( c) which is a constant number divided the wavelength

f = 3×10^6 / 1.0

Answer:

0.5m

Explanation:

v=f×lamda

v is 300m/s, f is 600Hz, lamda is ?

lamda=v/f

lamda=300/600

lamda =3/6=1/2m

Answer:

a thing or things belonging to someone; possessions collectively.

Explanation:

Answer:

a) greater

smaller

Explanation:

No

Refer to the attachment for calculations

Atomic Hydrogen emits a spectral line with a wavelength of 21 centimeters (or 21 cm) in the radio portion of the electromagnetic spectrum. This particular spectral line is known as the "Hydrogen Line" or the "21-cm Line." Radio astronomers utilize this wavelength to detect and map regions of H atoms in space. By observing the 21-cm line emissions, astronomers can study the distribution, velocity, and dynamics of atomic hydrogen in galaxies, interstellar mediums, and other astronomical objects. The 21-cm line has been instrumental in advancing our understanding of the structure and evolution of the universe.

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Answer:

The wavelength of the wave would increase to 10 meters.

Explanation:

We can use the formula:

velocity = frequency × wavelength

to relate the velocity, frequency, and wavelength of a wave.

Given that the wave has a speed of 20 m/s and a wavelength of 5 meters, we can solve for its frequency as follows:

frequency = velocity ÷ wavelength = 20 m/s ÷ 5 meters = 4 Hz

Now, if the same wave is created in the same medium, but with half the original frequency, its new frequency will be:

new frequency = 4 Hz ÷ 2 = 2 Hz

To find the new wavelength of the wave, we can rearrange the formula above to solve for wavelength:

wavelength = velocity ÷ frequency

Using the new frequency of 2 Hz, we get:

new wavelength = 20 m/s ÷ 2 Hz = 10 meters

Therefore, if the same wave was created in the same medium, with half the original frequency, the wavelength of the wave would increase to 10 meters.

The angle the string makes with the vertical is : 34.6°

Given data :

mass of rubber stopper ( m ) = 45 g

Radius ( r ) = 2.9 m

Time to complete one revolution ( T ) = 4.1 secs

applying the formula below

Tan ∅ = \(\frac{mw^2r}{mg}\) --- ( 1 )

cancel out m from equation ( 1  )

Tan ∅ = \(\frac{w^2r}{g}\)    ----- ( 2 )

where ; w = \(\frac{2\pi }{T}\)  

Therefore equation ( 2 ) becomes

Tan ∅ = \(\frac{4\pi ^2r}{T^2g}\)   --- ( 3 )

where ; r = 2.9 m, T = 4.1 secs , g = 9.8

Insert values into equation ( 3 )

Tan ∅ = 0.69

      ∅ = Tan ( 0.69 )

         = 34.6°

Hence we can conclude that The angle the string makes with the vertical is : 34.6°.

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8.8E16 seconds will pass on the battery.

The maximum charge that a cell phone battery can hold is indicated by its capacity.The question specifies the battery's capacity as Q = 5.5E-08 C.

The current times the time equals the amount of charge that is transferred per second. As a result, the current I is determined by dividing the charge Q by the time t.

\(I = \frac{Q}{t}\)

Rearranging the equation yields:

\(t = \frac{Q}{I}\)

The current I is equal to the number of electrons moving through the phone per second, which is 1.0 million, divided by the charge of an electron (1.6E-19 C)

\(I =\frac{ (1.0E6 electrons/sec)}{(1.6E-19 C/electron) }I = 6.25E24 electrons/sec\)

Therefore, the time t is equal to the capacity of the battery Q divided by the current I:

\(t =\frac{ Q}{I} t =\frac{(5.5E-08 C)}{(6.25E24 electrons/sec) }t = 8.8E16 seconds\)

Therefore,The battery will last 8.8E16 seconds.

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Ultraviolet light from the sun is absorbed primarily in Earth's ozone layer.

Ultraviolet (UV) light from the sun is absorbed primarily in Earth's atmosphere by a gas called ozone (O3). Ozone is present in the Earth's stratosphere, which is located about 10-50 kilometers above the surface. UV light with wavelengths between 200 and 290 nanometers (nm) is absorbed by ozone, which breaks it down into oxygen (O2) molecules and atomic oxygen (O). This process converts UV energy into heat, which warms the stratosphere. This absorption of UV radiation by ozone is important because it helps to protect life on Earth from the harmful effects of UV radiation, which can cause skin cancer, cataracts, and other health problems. The thickness of the ozone layer varies with location and time of year and can be affected by human-made chemicals, such as chlorofluorocarbons (CFCs), which have been phased out of use due to their destructive effect on ozone.

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Answer:

C. Expenditure

Explanation:

I took the quiz

The isotope that, when bombarded with bismuth-209, would yield two neutrons and an isotope with atomic number 121 and mass number 299 is Pb-211.

When a nucleus absorbs a neutron, it can undergo a nuclear reaction and transform into a different isotope. In this case, bismuth-209 (Bi-209) is bombarded, and it absorbs a neutron, becoming Bi-210. Bi-210 then undergoes beta decay, resulting in the formation of lead-210 (Pb-210). Pb-210 further undergoes beta decay, resulting in the formation of Pb-211, which has an atomic number of 121 and a mass number of 299. During this process, two neutrons are released.

Therefore, Pb-211 is the isotope that satisfies the given conditions of yielding two neutrons and an isotope with atomic number 121 and mass number 299 when bombarded with Bi-209.

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Answer:

A net force greater than 0 is the answer

Explanation:

trust

Answer:

b c

Explanation:

Answer:

Weight is a measure of the force of gravity pulling down on an object. It depends on the object's mass and the acceleration due to gravity, which is 9.8 m/s2 on Earth. The formula for calculating weight is F = m × 9.8 m/s2, where F is the object's weight in Newtons (N) and m is the object's mass in kilograms.

Explanation:

The wavelength of ultrasound with a frequency of 2.40 MHz is approximately 0.625 mm.

Ultrasound is widely used in medicine for both diagnostic imaging and therapeutic purposes. In diagnostic imaging, short pulses of ultrasound are directed into the patient's body. When these pulses encounter a structure of interest, they bounce back as echoes. By recording and analyzing these echoes, medical professionals can determine the distance to the reflecting structure.

However, to reveal fine detail, it is crucial for the wavelength of the ultrasound wave to be small compared to the size of the object reflecting the wave.

The speed of ultrasound in human tissue is approximately 1500 m/s, which is similar to the speed of sound in water. To calculate the wavelength, we can use the formula: wavelength = speed of sound / frequency.

In this case, the frequency is given as 2.40 MHz, which is equivalent to 2.40 million cycles per second. By substituting the values into the formula, we get:

wavelength = 1500 m/s / 2.40 MHz

          = 1500 m/s / (2.40 x 10⁶ Hz)

          ≈ 0.625 mm

Therefore, the wavelength of ultrasound with a frequency of 2.40 MHz is approximately 0.625 mm.

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Answer:

80

Explanation:

You calculate work by W(j)=Force(n) x distance moved (m)

So 20.0 N x 4.0 m = 80.

:)

The work done when a baker pushes a cart full of rolls with a force of 20.0 N for a distance of 4.0 m is 80 Nm.

The work done by a force can be defined as the product of the displacement of that object and the component of the applied force of the object which is in the same direction as that of displacement. When we push a block with some force 'f' and the body moves with some acceleration, work is done.

W = f × d

where, W = work done,

f = applied force,

d = displacement of the object

W = 20N × 4.0m

W = 80Nm

Therefore, the work done by the baker on that cart is 80 Newton meters.

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Denaturation refers to the process of alteration of the native structure of proteins. Some of the statements about denaturation are true, and some of them are false.

True statements:

A denatured protein has a different tertiary structure than its native state. Soaking fish in the lime juice (pH 2.3) denatures the proteins. Digestive enzymes hydrolyze proteins. Egg white meringue, made by beating egg whites, contains denatured proteins

False statements:

A denatured protein has a different primary structure than its native stateDenaturation and digestion refer to the same process. Cooking an egg hydrolyzes its albumin. This statement is false because cooking an egg does not hydrolyze its albumin but denatures it. This process can be referred to as coagulation.

Denaturation and digestion are not the same process. Denaturation refers to the alteration of the native structure of proteins, while digestion refers to the breakdown of food into smaller and simpler molecules in the body through mechanical and chemical processes.

Hence, the statements that are true are:

A denatured protein has a different tertiary structure than its native state.

Soaking fish in the lime juice (pH 2.3) denatures the proteins.

Digestive enzymes hydrolyze proteins. Egg white meringue, made by beating egg whites, contains denatured proteins.

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The assembly and disassembly of IFs are regulated by a variety of factors, including phosphorylation, subunit availability, pH, and ionic strength.

Intermediate filaments (IFs) are components of the cytoskeleton that control a variety of biological processes. IFs are typically less dynamic than microtubules and actin filaments, and they appear to be more stable. The assembly and disassembly of intermediate filaments are regulated by phosphorylation-dephosphorylation mechanisms.

The assembly and disassembly of intermediate filaments are controlled by a variety of factors. One of the primary determinants of IF dynamics is phosphorylation. Phosphorylation of specific residues on the IF proteins affects both the ability of the protein to form filaments and its stability once it has formed a filament.

In some cases, the presence of free subunits can promote filament formation, while in others, the formation of complexes between subunits can inhibit filament assembly. Changes in pH or ionic strength can also affect the assembly and disassembly of IFs.Intermediate filaments (IFs) are cytoskeletal structures that are typically more stable than microtubules or actin filaments.

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The weight of the combined system = 1,996.3 N

Given,

Mass of the Plastic tank = 3.5 kg

Volume of the liquid water in the tank = 0.2 m³

Density of water = 1000 kg/m³  

Now,

We know

Density = Mass ÷ Volume

Thus,

Mass = Density × Volume

therefore,

Mass of the water in the tank = 1000 × 0.2

= 200 kg

Thus,

The mass of the combined system = 3.5 kg + 200 kg = 203.5 Kg

Also,

Weight in N = Mass × Acceleration due to gravity (g)

and,

g = 9.81 m/s²

Therefore,

The weight of the combined system = 203.5 kg × 9.81 m/s²

= 1,996.3 N

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Answer:

Answer is on the pic

Explanation:

I hope it's helpful!

Answer:

The total frictional force equals 60 N

Explanation:

We know that F - f = ma where F is the applied force, f is the frictional force, m the mass of the object and a its acceleration.

Now, since the cart moves with constant velocity, its acceleration is zero. So, a = 0.

So F - f = ma

F - f = m(0) = 0

F - f = 0

So, F = f

From the above, we see that the frictional force equals the applied force which is equal to 60 N.

So, f the total frictional force equals 60 N

Answer:

gravity

Explanation:

ok what i understand from your query is that a spring balance with a metal piece attached to it is weighing it down, a spring balance is measured in newtons (f=ma), the acceleration part is gravity (-9.81 m/s^2). The metal piece is attached to the string.

hope this answers your question and please take my answer with a grain of salt and refer to some webpages or videos

Answer:

\(194.44kw\)

Explanation:

\(power = \frac{workdone}{time \: taken} \)

\( p = \frac{8750000}{45} \)

\(p = 194444.44watt\)

\(p = 194.44kw\)

The basic requirement for a fusion reaction is a combination of high temperature and pressure, along with a sufficient amount of fuel.

In fusion, the aim is to merge light atomic nuclei, typically isotopes of hydrogen, to form a heavier nucleus and release a tremendous amount of energy. Achieving the necessary conditions involves confining the fuel, such as deuterium and tritium, using powerful magnetic fields or intense laser beams.

These confinement methods ensure that the fuel is heated to millions of degrees, creating a plasma state where atomic collisions occur at high velocities. The high temperature and pressure cause the atomic nuclei to overcome their mutual electrostatic repulsion and merge, releasing energy in the form of light and heat.

Properly sustaining and controlling these conditions are key to realizing controlled fusion reactions, which hold immense potential as a clean and virtually limitless energy source.

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Answer:

C. Neap Tides

Explanation:

Answer:

c neap tides

Explanation: