In music, the note G above middle C has a frequency of about 392 hertz. If the speed of sound in the air is 340 m/s, what is the approximate wavelength of this note?(1 point)

1.2 meters

8.7 meters

0.87 meters

0.0026 meters

The type of pure substances that can create elaborate structures is :

( D ) Atoms that are not attracted to each other because they will stay still and end up laying on top of each other.

An elaborate structure is a complex structure formed by the combination of different unrelated parts. Atoms that are un attracted to each other are made of different parts therefore when they come together they will lay on each other, forming an elaborate structure which is complex in nature.

Hence we can conclude that the type of pure substance that can create elaborate structures is Atoms that are not attracted to each other because they will stay still and end up laying on top of each other.

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Answer:

7.5 x 10⁻⁸N

Explanation:

Given parameters:

Mass 1  = 60kg

Mass 2  = 75kg

Distance between the bodies  = 2m

Unknown:

Gravitational fore  = ?

Solution:

The gravitational force between the two bodies can be derived using;

  F  = \(\frac{G mass 1 x mass 2}{distance^{2} }\)  

    G is the universal gravitation constant  = 6.67 x 10⁻¹¹m³kg⁻¹s⁻²

Insert the parameters and solve;

  F  = \(\frac{6.67 x 10^{-11} x 60 x 75}{2^{2} }\)   = 7.5 x 10⁻⁸N

Answer:

E) All of the above

Explanation:

PLEASE MARK ME AS BRAINLIEST

Answer:

I believe it's number 2 not for sure.

Explanation:

hope this helps you

Answer:

the answer to this question will be False

Answer:

false.......,.....,...........

Answer:

See below

Explanation:

Putting in the values of B and C into the acceleration equation gives us this :

 2(t^2) - 1/2(- 4) t =  2t^2 +4t

 acceleration = a = 2t^2 +2t

Now remember   velocity final = a * t

                             vf =          a                *   t

                             vf = [2(5^2) +2(5) ]    *   5 =   300 m/s

and d = 1/2 a t^2    <====== (for an object starting at rest)

          = 1/2            a                          t^2    

          = 1/2  ( 2(5^2)+2(5)  )       *      5^2     = 55 meters

The density of the lead will be equal to 11.3 gram per centimeter cube such that the volume of the bottle remains the same in all the cases.

Density of a material is defined as mass per volume that means how many grams are confined in a certain amount of volume density depending on temperature and changes with temperature.

Volume is a measure of occupied three-dimensional space. It is often quantified numerically using SI derived units or by various imperial units. The definition of length is interrelated with volume.

Given:

Mass of relative density bottle = 25.8g.

Mass of relative density bottle with lead shots only = 69.3 u

Mass of relative density bottle filled with water = 75.8g

Mass of relative density of bottle filled with lead and water =115.1g

Using the relationship between mass , density and volume

i.e. mass = density × volume

25.8 = 115.1× volume

volume = 0.27 u

Using the mass density equation for the volume we get,

Volume of the bottle with the lead=69.3/0.27 Volume of the bottle with the lead =260 u

Finally the density of the lead = \(\frac{260 \times 10}{69.3 + 115}\)

Finally the density of the lead = 11.3 u

Therefore, The density of the lead will be equal to 11.3 gram per centimeter cube such that the volume of the bottle remains the same in all the cases.

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Answer:

Approximately \(240\; {\rm Hz}\).

Explanation:

Consider how the motion of the boat (the source) affects the period of the sound wave as it appears to the observer.

The sound wave from this boat travels at the speed of sound \(v(\text{sound})\). At the same time, the boat (the source) is moving away from the observer at a speed of \(v(\text{boat})\). Let \(T_{s}\) denote the period of this wave, and let \(f_{s}\) denote the frequency.

The boat emits a wave crest after every interval of \(T_{s}\). During that time, the boat would have moved \(v(\text{boat})\, T_{s}\) further away from the observer. As a result, each subsequent crest would require an additional time of \(\Delta T\) to reach the observer:

\(\begin{aligned}\Delta T &= \frac{(\text{extra distance})}{(\text{wave speed})} = \frac{v(\text{boat})\, T_{s}}{v(\text{sound})}\end{aligned}\).

The source continues emitting crests with an interval of \(T_{s}\). However, because of the extra distance, it would appear to the observer that crests are arriving with an interval of:

\(\begin{aligned}T_{o} &= T_{s} + \Delta T \\ &=T_{s} + \frac{v(\text{boat})\, T_{s}}{v(\text{source})} \\ &= \left(1 + \frac{v(\text{boat})}{v(\text{source}}\right)\, T_{s}\end{aligned}\).

As it appears to the observer, the frequency of this wave would be:

\(\begin{aligned}f_{o} &= \frac{1}{T_{o}}\\ &= \frac{1}{\displaystyle \left(1 + \frac{v(\text{boat})}{v(\text{source}}\right)\, T_{s}} \\ &= \frac{f_{s}}{\displaystyle \left(1 + \frac{v(\text{boat})}{v(\text{source}}\right)} \\ &= \frac{250\; {\rm Hz}}{\displaystyle \left(1 + \frac{15\; {\rm m\cdot s^{-1}}}{342\; {\rm m\cdot s^{-1}}}\right)} \\ &\approx 240\; {\rm Hz}\end{aligned}\).

Of the four thermodynamic quantities listed, enthalpy is the only one that is a state function. A state function is a thermodynamic quantity that depends only on the initial and final states of a system, and not on the path taken to reach those states.

Enthalpy is a state function because it is defined as the sum of the internal energy of a system and the product of its pressure and volume, both of which are state functions.

Energy, work, and heat, on the other hand, are not state functions because they depend on the specific process or path taken to change the state of the system. The amount of work done or heat transferred depends on the specific conditions of the process, such as the pressure, temperature, and volume of the system, as well as the rate at which the work or heat is transferred. Therefore, these quantities are not solely dependent on the initial and final states of the system and cannot be considered state functions.

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Answer:

it's made of land, rocks, water and many more

Explanation:

if you think about it, mountains are just giant rocks. and the ocean is water and land is... well land

Answer:

Well all Ik is that when the earth was formed it was a big hot rock then the water came in and settled it and the animals kinda became land creatures the yea

Explanation:

A 30 mile flight restriction around the super bowl stadium will be enforced by norad with air force fighters.

NORAD, short for North American Aerospace Defense Command, is a joint organization between the United States and Canada that is responsible for aerospace warning and control. NORAD's primary mission is to detect, track, and respond to any aerospace threat to North America, including potential attacks from hostile aircraft, missiles, or spacecraft.

NORAD operates a complex network of radar systems, satellites, and other sensors that provide continuous monitoring of the airspace above North America. In the event of a potential threat, NORAD works closely with the US Air Force and Canadian military to respond appropriately and protect the safety and security of North America.

During the Super Bowl, a 30-mile flight restriction is put in place around the stadium for security reasons. This restriction is enforced by NORAD, the North American Aerospace Defense Command, with the assistance of Air Force fighters.

The purpose of this restriction is to prevent any unauthorized aircraft from entering the airspace around the stadium, which could pose a potential threat to the safety of the game and its attendees. NORAD and the Air Force work together to ensure that the airspace is secure and that any aircraft that enters the restricted airspace is immediately identified and intercepted if necessary.

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Answer:

Light energy, Sound energy, and Heat energy

Explanation:

Heat energy is the most easily dissipated form of energy. Light energy is frequently energy seen in combustion, and is a type of wave motion. Sound energy is another type of wave motion caused by the vibration of molecules in the air. Like heat energy, sound is a type of energy that is generally lost.

The electromagnetic waves with an energy of \(1.5 \times 10^{-24} J\) are likely X-rays.

The energy of an electromagnetic wave is related to its frequency and wavelength by the equation:

E = hf = hc/λ

where:

E = energy of the electromagnetic wave

h = Planck's constant (\(6.626 \times 10^{-34} J s\))

f = frequency of the electromagnetic wave

c = speed of light (\(3.00 \times 10^8 m/s\))

λ = wavelength of the electromagnetic wave

Solving for λ:

λ = hc/E = \((6.626 \times 10^{-34} J s)(3.00 \times 10^8 m/s)/(1.5 \times 10^{-24} J)\)

λ ≈ \(4.40 \times 10^-8 m\)

This corresponds to a wavelength of about 44 nanometers, which falls in the range of X-rays. Therefore, the electromagnetic waves with an energy of \(1.5 \times 10^{-24} J\) are likely X-rays.

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The type of antenna suited for endpoint of a long distance outdoor point-to-point bridge is dish antenna.

An antenna is basically a small length of a conductor that radiates and receive electromagnetic waves. It acts conversion device. Several types of antenna are used in communication.

A dish antenna is a highly directional antenna used for transmission and reception of microwaves. Its active component is a small dipole placed at focus of a parabolic reflector which is called spherical dish. In the receiving mode, dish collects the electromagnetic radiations and focuses them on dipole. This is done so that these signals are converted into electrical signals.

The power of dish antenna is denoted as P :

\(P= 6(D/a)^2\)

D= diameter of reflector

a= wavelength of radiations

Significance of dish antenna is their application in Radars and Satellite Communication. In Transmitter , the dipole converts electrical signals to  electromagnetic radiations which are transmitted as parallel beam.

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Given: Mass= 35kg

Ekinetic= 190 J

Analysis: Ek= mv^2/2

solution: 190J=35v^2/2

V=square root(2×190)÷2= 3.2 m/s

The child's speed in meters per second at the bottom of the hill is 3.235 meter/sec.

It is the type of energy an object has due to its motion. it is directly proportional to the product of mass and the square of the velocity of the object. It is given by the formula,

Kinetic Energy = 0.5 × Mass × (Velocity)²

Given that the mass of the child is 35 kg and the kinetic energy of the child after sledding down a hill is 190 J. Therefore, the speed of the child can be written as,

Kinetic Energy = 0.5 × Mass × (Velocity)²

190 J = 0.5 × 35 kg × (Velocity)²

(Velocity)² = 190 J / (0.5 × 35 kg)

(Velocity)² = 10.857142

Velocity = √10.857

Velocity = 3.235 m/sec

Hence, the speed is 3.235 m/sec.

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Answer:

Velocity can be directly added or subtracted.

For example, if a boat has a velocity V in still water.

And now you put the boat in a river with a current that has a velocity V'

The total velocity of the boat in that river is just the addition of these two velocities.

Velocity in the river  = V + V'

Where the only tricky part is that the velocity is a vector, so you need to take in account the directions of each vector.

In this case, we have a plane with a maximum velocity of 160km, let's assume a direction for this velocity, let's say that is in the positive x-direction.

Then we can write the velocity in the vector form:

velocity  = (vel in x-axis, vel in y-axis)

The velocity of the plane can be written as:

v = (160km/h, 0)

Now we add a crosswind of 30km/h

crosswind means that it is perpendicular, then it acts on the y-axis.

Then the total velocity of the plane will be:

velocity = (160km/h, 0) + (0, 30km/h)

velocity = (160km/h, 30km/h)

Now you can compute the total velocity of the airplane as the module of that vector.

Remember that for a vector (x, y) the module is:

mod = √(x^2 + y^2)

Then the module of the velocity is:

v = √( (160km/h)^2 + (30km/h)^2) = 162.8 km/h

Answer:

If the car comes to a sudden stop, your body tends to keep moving forward.

Explanation:

The magnitude of the magnetic field for that wave at point p is 1.9 × 10-6 T.

The given question is related to the electromagnetic wave. The magnitude of the electric field at a point p for a certain electromagnetic wave is 570 N/C.

We need to determine the magnitude of the magnetic field for that wave at p.

So, we know that an electromagnetic wave consists of an electric field and a magnetic field perpendicular to each other.

We can use the formula to find the relation between the electric and magnetic fields for an electromagnetic wave.c = E/B Where,c is the speed of light (3 x 108 m/s)E is the electric field intensityB is the magnetic field intensity

Using the above equation, we can find the magnetic field for that wave at point P.

Magnitude of the electric field, E = 570 N/CMagnitude of the speed of light, c = 3 x 108 m/s

Putting values in the above formula;570 = B x 3 x 108B = 570/3 x 108B = 1.9 × 10-6 T

Therefore, the magnitude of the magnetic field for that wave at point p is 1.9 × 10-6 T.

Thus, the magnitude of the magnetic field for that wave at point p is 1.9 × 10-6 T.

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Answer:

A quantity that does not depend on the direction is called a scalar quantity. Vector quantities have two characteristics, a magnitude, and a direction. Scalar quantities have only a magnitude. When comparing two vector quantities of the same type, you have to compare both the magnitude and the direction.

Scalar quantities only have magnitude (size). Scalar quantities include distance...

A quantity that is specified by both size and direction is a vector. Displacement includes both size and direction and is an example of a vector. However, distance is a physical quantity that does not include a direction and isn't a vector.

Explanation:

hope this helps...

Answer:

Please find attached the required graph of the data points

The graph can be interpreted as showing that which was at rest starts  moving at a constant speed of 2 km/min

Explanation:

The table is presented as follows;

\(\begin{array}{lcl}Time \ (min)&& Distance \ (km)\\0&&0\\5&&10\\10&&20\\15&&30\\20&&40\\25&&50\\30&&60\end{array}\)

The graphic representation of the above data can be created by plotting the Time on the x-axis and the Distance on the y-axis on a graph paper

The graph of the data can be created also using a spreadsheet application such as MS Excel by using the Chart function under the Insert menu, after selecting the points input into cells on the spreadsheet as shown in the attached drawing

The distance travelled by the car in a given time is found by obtaining the rate of change of the values of the graph, m, as follows;

\(m =\dfrac{y_{2}-y_{1}}{x_{2}-x_{1}}\)

Where (y₁, x₁), and (x₂, y₂) are a pair of chosen points on the given line

When, the chosen points are (y₁, x₁) = (0, 0), and (x₂, y₂) = (30, 60), we get;

\(m =\dfrac{60 \, km-0 \, km}{30 \, min-0 \, min} = 2 \, km/min\)

The graph can be interpreted as showing that the rate of change of the distance travelled by the car per  unit time which is the speed of the car starting from rest is 2 km/min

Answer:

Explanation:

Its surface is rocky, with canyons, volcanoes, dry lake beds and craters all over it. Red dust covers most of its surface. Mars has clouds and wind just like Earth

Answer: C. 12.6

Explanation: 2*pi*1.8= 11.304

11.304/0.9= 12.56

The wavelength of the baseball is 1.32×10−34m 1.32 × 10 − 34 m .

Wavelength can be defined as the distance between two successive crests or throughs of a wave.

To calculate the equivalent of a baseball having Mars 155 g moving at =25.3 m/s. (So in this question we used the concept of the equivalent and how to  prevalent the  related with article mass and velocity). So π that is equal to H divided by M. V. Where π is the equivalent and M is the mass of particle V. Is the velocity and H is the plank's constant whose value =6.6 26 <10 arrays to power minus 34 kg meter square and the  second universe. And this Mv basically we can be  call it as particles momentum. This is the  particle's momentum because momentum that is this P is equal to M into so in the  march into willow stream that is known as it is  momentum. Let us see to the  data given in the question we are given masks by  of the  baseball 1 55 g and we know one kg that is =2000 g. So we have to convert this mask in terms of the kg. So which is equal to the  point of= 1 55 kg.

And so this kg  cancel out second universities also to the   So on solving this time we get =1.689 into =10 arrays to power -34 m. So  this is the equivalent of to the  baseball, So hence they equivalent of the baseball and this is =1.689 ×10, raised to power -34 m.

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Answer:

Yellow dwarfs are small, main sequence stars. The Sun is a yellow dwarf. A red dwarf is a small, cool, very faint, main sequence star whose surface temperature is under about 4,000 K. Red dwarfs are the most common type of star. Proxima Centauri is a red dwarf.

Explanation:

Answer:

Red dwarfs are low-mass main-sequence stars. Yellow dwarfs are main-sequence (dwarf) stars with masses comparable to that of the Sun.

Explanation:

A hockey puck traveling at speed v on essentially frictionless ice collides elastically with one end of a straight stick lying flat on the ice. In this collision, both the momentum and kinetic energy are conserved due to the frictionless surface and elastic nature of the impact, leading to the puck and stick interacting without any energy loss.

When the hocket puck collides elastically with the end of the straight stick on the essentially frictionless ice, the momentum of the hocket puck is transferred to the stick. This transfer of momentum causes the stick to move in the opposite direction of the hocket puck's initial path. If the collision is perfectly elastic, there will be no loss of kinetic energy during the collision, and the hocket puck and stick will both continue to move at their respective speeds after the collision.

However, if there is any loss of kinetic energy during the collision, the speed of both the hocket puck and the stick will decrease slightly. Overall, the outcome of the collision will depend on the mass and velocity of the hocket puck and the stick, as well as the angle and position of the collision.
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Initial velocity of the cat (u) = 0 m/s [it starts from rest]

Final velocity of the cat (v) = 10 m/s

Time (t) = 2 sec

Let the acceleration of the cat be a m/s^2

By using the equation,

a = v-u/t, we get

a = 10-0/2

or, a = 10/2 = 5

The acceleration of the cat is 5 m/s^2.

Given :

A cell of e.m.f  1.5 V and internal resistance 2.5 ohm is connected in series with an ammeter of resistance 0.5 ohm.

To Find :

The current in the circuit.

Solution :

We know, resistance of the ammeter is in series with the circuit.

So, total resistance is :

R = 2.5 + 0.5 ohm

R = 3 ohm

Also, e.m.f applied is 1.5 V .

Now, by ohm's law :

\(I = \dfrac{V}{R}\\\\I = \dfrac{1.5}{3}\\\\I = 0.5 \ A\)

Therefore, the current in the circuit is 0.5 A.

A moon has more mass than the planet it circles and less mass than a star.

Do planets have a greater mass than stars?

By this definition, "stars" must be larger than planets in terms of mass. The size of a white dwarf would be comparable to that of a moon or small planet, but its mass would be approximately 200–1300 times that of Jupiter. Even more extreme are neutron stars, which are about the size of an asteroid but have a mass of several thousand Jupiters.

Why is the weight of the same object different on different planets Class 7?

The weight of an object is determined by its mass and the gravitational force that it experiences. The separation between two objects affects how strong gravity is. Because of this, an object weights differently on many planets.

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Answer:

Average velocity = 82.22 km/h

Explanation:

Average Velocity = (Total distance)/(Total time)

When the car was first driven for 1 h with a velocity of 100 km/h towards the south

Velocity = Distance/time

Distance = Velocity * time

Distance covered, D1 = 100 * 1 = 100 km

When the car was driven for 0.50 h with a velocity of 50 km/h towards the north

Distance = Velocity * time

Distance covered, D2 = 50 * 0.5 = 25 km

When the car was driven for 0.75 h with a velocity of 80 km/h towards the south

Distance = Velocity * time

Distance covered, D3 = 80 * 0.75 = 60 km

Total distance traveled = D1 + D2 + D3

Total distance traveled = 100 + 25 + 60

Total distance traveled = 185 km

Total time taken = 1 + 0.5 + 0.75

Total time taken = 2.25 h

Average velocity = Total distance/ total time

Average velocity = 185/2.25

Average velocity = 82.22 km/h

Answer:

The four forms of energy are:

1. Kinetic Energy

2. Radiation Energy

3. Potential Energy

4. Chemical Energy

Explanation:

Above are listed the four main types of energy. Hope this helps! :)

The forward force of the car, given that is has a weight of 1302 kg and accelerating forward at a rate of 4 m/s² is 5208 N

We know that acceleration and force are related according to the following equation:

Force (F) = mass (m) × acceleration (a)

With the above formula, we can determine the forward force of the car. Details below

The following data were obtained from the question:

Forward force = mass × acceleration

Forward force = 1302 × 4

Forward force = 5208 N

Thus, the forward force is 5208 N

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