A diver is on a board 1.80 m above
the water. She jumps straight up
at 3.62 m/s.
At what speed does she hit the water?
[?] m/s

Answer:

Explanation:

Sound, seismic, and electromagnetic waves transmit energy through different mediums due to the motion of particles in the medium.

Sound waves transmit energy through the vibration of particles in a solid, liquid, or gas. The energy is transferred from particle to particle as the wave travels through the medium.

Seismic waves are created by the sudden release of energy from earthquakes, volcanic eruptions, or other geological events. These waves travel through the Earth's solid mantle and crust, transmitting energy through the vibration of particles in the rock.

Electromagnetic waves are a type of wave that does not require a medium to travel through. They are created by the motion of charged particles, such as electrons, and can travel through a vacuum, such as space. Electromagnetic waves transfer energy through the oscillation of electric and magnetic fields.

Answer:

Explanation:

Radius of first spherical ball =

2

2

​

cm=1cm

Radius of second spherical ball =

2

2

3

14.5

​

​

cm=

3

14.5

​

cm

Let the radius of the third ball be r cm.

Radius of the main spherical ball =

2

5

​

cm=2.5cm

Volume of main spherical ball = Volume of spherical ball  1+Volume of spherical ball 2+ Volume of spherical ball 3

Volume of a sphere =

3

4

​

πr

3

So,  

3

4

​

π×2.5

3

=

3

4

​

π1

3

+

3

4

​

π(

3

14.5

​

)

3

+

3

4

​

πr

3

⇒2.5

3

=1

3

+(

3

14.5

​

)

3

+r

3

⇒r

3

=15.625−1−14.5

⇒r

3

=0.125=0.5×0.5×0.5

⇒r=0.5

Answer:

Explanation:

right

According to the information, we can infer that the correct sentence is: A mosquito flying with a velocity of 5 m/s (option C).

Momentum is a term that refers to a physical property of moving objects. Momentum is a measure of the amount of motion a moving object has and is related to the mass and velocity of the object.

Based on the above, we can infer that the correct option is correct because the fly would have more momentum than the other objects because its mass is less W

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According to   equations of motion, we get after 8.70 seconds  she running directly east.

These are the three equations:

Given :

v₀ = 2.38 m/s

v = 0 m/s

a = 0.310 sin (-62.0°) m/s²

to find time t :

v = at + v₀

0 m/s = (0.310 sin (-62.0°) m/s²) t + (2.38 m/s)

t = 8.70 s

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Answer:

The crust is the outer rigid layer of a planet

Answer:

The lithosphere

Explanation:

I would conduct a research program to observe and analyze the spectra of galaxies to gather information about their composition and motion.

With my limited observing time on the world's largest telescope, I would focus on collecting spectral data from various galaxies. Spectroscopy allows astronomers to analyze the light emitted by celestial objects and identify the elements present in their composition. By observing the spectra of galaxies, I could look for distinct patterns or signatures that could differentiate between the two hypotheses.

In the case of the Nebular Hypothesis, which suggests that spiral galaxies are merely nebulae within our own Milky Way, the spectral data would likely exhibit similarities to known nebulae. It would show characteristic emission lines associated with ionized gases, such as hydrogen or oxygen. If this were the case, it would support the notion that spiral galaxies are part of our own galaxy.

On the other hand, if the spectral data revealed a different pattern, such as absorption lines indicative of stars or stellar processes, it would lend support to the Island Universe Hypothesis. This hypothesis proposes that spiral galaxies are distinct, independent entities scattered throughout the universe. The presence of absorption lines associated with specific chemical elements or molecules commonly found in stars would suggest that spiral galaxies are not just nebulae but actual galaxies in their own right.

By carefully analyzing the spectral data collected from various galaxies, I would be able to compare their compositions and identify any significant differences that would help discriminate between the two hypotheses. This research program offers the best chance of success because it leverages the power of spectroscopy to provide concrete evidence regarding the nature of spiral galaxies, regardless of the absence of Cepheid variables in Andromeda.

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Answer:

25

Explanation:

sin(30) = x/50

x = 25

Part A: The diameter of the path followed by the alpha particle is approximately 0.285 meters (to 3 significant figures).

The path followed by a charged particle in a magnetic field can be determined using the formula for the radius of the circular path: r = (m*v) / (q*B), where r is the radius, m is the mass of the particle, v is its velocity, q is its charge, and B is the magnetic field strength.

Given the mass of the alpha particle (m = 6.64x10^(-27) kg), its velocity (v = 35.6 km/s = 35.6x10^3 m/s), the charge of an alpha particle (q = 2 times the charge of an electron), and the magnetic field strength (B = 1.20 T), we can calculate the radius of the path.

Plugging in the values into the formula, we have: r = (6.64x10^(-27) kg * 35.6x10^3 m/s) / (2 * 1.60x10^(-19) C * 1.20 T) = 0.285 meters.

Therefore, the diameter of the path followed by the alpha particle is approximately 0.285 meters.

Part C: The magnitude of the acceleration of the alpha particle while it is in the magnetic field is 8.92x10^12 m/s^2 (to 3 significant figures).

The acceleration of a charged particle moving in a magnetic field is given by the formula: a = (q * v * B) / m, where a is the acceleration, q is the charge of the particle, v is its velocity, B is the magnetic field strength, and m is its mass.

Using the given values, we can calculate the acceleration: a = (2 * 1.60x10^(-19) C * 35.6x10^3 m/s * 1.20 T) / 6.64x10^(-27) kg = 8.92x10^12 m/s^2.

Therefore, the magnitude of the acceleration of the alpha particle while it is in the magnetic field is approximately 8.92x10^12 m/s^2.

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Explanation:

ME!!!!!!!!!!!!!!!!!!

Answer:

I Fully Agree with this becoz it is only the key...

Do u agree?

The word that completes each statement are as follows:

In Science, a force can be defined as a push or pull of an object or physical body, which typically results in a change of motion (acceleration), especially due to the interaction of the object with another.

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Sure! Here are the steps for calculating the velocity and distance traveled by the car after 50 seconds :

Step 1: Calculate the velocity using the equation:

\(v = u + at\)

where:

- \(v\) is the final velocity

- \(u\) is the initial velocity (0 m/s, as the car starts from rest)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(v = 0 + (3 \, \text{m/s²}) \times (50 \, \text{s})\)

Step 2: Calculate the distance traveled using the equation:

\(s = ut + \frac{1}{2}at^2\)

where:

- \(s\) is the distance traveled

- \(u\) is the initial velocity (0 m/s)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(s = 0 \times (50 \, \text{s}) + \frac{1}{2} \times (3 \, \text{m/s²}) \times (50 \, \text{s})^2\)

Now, let's simplify these equations:

\(v = 3 \times 50\)

\(s = \frac{1}{2} \times 3 \times 50^2\)

Calculating the results:

\(v = 150\) m/s

\(s = 3750\) meters

Therefore, after 50 seconds, the car will have a velocity of 150 m/s and would have traveled a distance of 3750 meters.

Answer:

67.56kg

Explanation:

Fapp+mg = ma

Fapp= applied force

mg = reactional force

g = acceleration due to gravity

Where g = 9.8m/s^2 a= 5 m/s2, Fapp= 1000N.

1000N = ma + mg

1000N = m( a+g )

1000N = m ( 5+9.8)

1000N = m×14.8

m = 1000÷14.8

m = 67.56kg.

Hence the mass of the wagon will be 67.56kg

Answer:

Starting from the beginning.

There is a radio signal that is received by the radio.

The radio interprets the signal and produces a current in response to it.

That current goes to a membrane that oscillates producing sound, the oscillation of the membrane is the first mechanical energy event here.

These oscillations can travel in material mediums, for example, the air. Then there is a production of waves (soundwaves) that travel in the air (second event).

Those waves now hit the wall that separates you and your neighbor, as the wall is made of a material, the soundwaves can travel through it, but they will be dispersed (a part of the waves rebounds on the wall, and another part is dissipated as the wave travels through the wall), there is also a transmitted part of the wave, that is now in your house. (this change of medium will be the third event). Now only the lower frequencies survive, this is why the sound is "muffled".

Those remaining frequencies now travel in your house, and when they reach your ear, your ear sends a signal to your brain and your brain interprets them as sound. The wave interacting with your ear will be the fourth and last mechanical energy event.

Therefore, the cart will be going 90 m/s at 30 sec This problem can be solved using kinematic equations. There are two ways to approach this problem

The main answer method is a shortcut, while the  method involves the use of formulas. method is as follows The impulse J equals the change in momentum p. The formula is as follows J = pSubstitute the values into the formula

J = p30 N × 60 s = p1,800

N·s = p

The change in momentum is equal to the mass times the velocity difference.

The problem can be solved using kinematic equations. The first step is to find the acceleration of the cart. The formula is as follows F = maSolve for a:a = F/mSubstitute the values into the formula:

a = 30 N/10 kg = 3 m/s²

The second step is to use the following formula to find the final velocity v = u + at The initial velocity u is 0 m/s because the cart is at rest

.v = u + at

Substitute the values into the formula:

v = 0 m/s + (3 m/s²)(30 s)v = 90 m/s

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Answer:

Emperor penguins are near the top of the Southern Ocean’s food chain. They have a varied menu that changes with the season. Some prey items are more important than others. One of the most frequently eaten prey species is the Antarctic silverfish Pleuragramma antarcticum. They also eat other fish, Antarctic krill and some species of squid. Most prey items are small. Since they are very cold when ingested, their small size makes it easier to bring food up to body temperature to digest it.

The average acceleration of the helicopter, given that it changes its velocity from 22.0 m/s to 10.0 m/s is –1.5 m/s²

We understood that acceleration is defined as the change in velocity with time i.e

a = (v – u) / t

With the above formula, we can determine the average acceleration of the helicopter. Details below

The following data were obtained from the question:

a = (10 – 22) / 8

a = –12 / 8

a = –1.5 m/s²

Thus, we can conclude that the average acceleration is –1.5 m/s²

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Answer:

15 kg ball

Explanation:

A tuning fork with a frequency of 200 Hz will resonate when a sound wave incident on it has a frequency that matches its natural frequency.

This is because the tuning fork is designed to vibrate at a specific frequency, which is determined by its shape and size. When the tuning fork is struck, it begins to vibrate at its natural frequency, producing a sound wave that has a frequency of 200 Hz. When a sound wave with a frequency of 200 Hz strikes the tuning fork, it causes the tuning fork to vibrate at its natural frequency, leading to resonance.

It is important to note that the tuning fork will not resonate with sound waves that have a frequency different from its natural frequency of 200 Hz. If a sound wave with a different frequency strikes the tuning fork, the tuning fork will not vibrate at its natural frequency and resonance will not occur.

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A spring of force constant 120 N/m acted up by a constant force of 240N. Then, the elastic potential energy stored in the spring is 240 Nm.

The elastic potential energy stored in the spring is formulated as follows

                                                 PE = ½kx²

Where PE is the elastic potential energy, x is the displacement of the spring from its equilibrium position, and k is the spring force constant.

In this question, the spring force constant is 120 N/m, and the constant force acting on the spring is 240 N. To find the spring displacement, we can use the formula:

F = kx

Where F is the force acting on the spring, x is the displacement, and k is the force constant,

So that:

F = kx

240 N = 120 N/m . x

x = 240 N/120 N/m

x = 2 m

Once x is known, then we can calculate the potential energy of the spring:

PE = ½kx²

PE = ½ (120) (2²)

PE = 60 x 40

PE = 240 Nm

So, the elastic potential energy stored in the spring is 240 Nm.

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Answer:

A. consumers

B. multi-cellular

Explanation:

Only plants have chlorophyll and only plants have a cell wall so C and D are out of the window. They are consumers because, they don't have photosynthesis so they have to eat. They are multi-cellular because, animals all have at least a brain, body, etc. Which all need millions of cells.

Answer:

0.969 s  (3 s.f.)

Explanation:

Constant Acceleration Equations (SUVAT)

\(\boxed{\begin{array}{c}\begin{aligned}v&=u+at\\\\s&=ut+\dfrac{1}{2}at^2\\\\ s&=\left(\dfrac{u+v}{2}\right)t\\\\v^2&=u^2+2as\\\\s&=vt-\dfrac{1}{2}at^2\end{aligned}\end{array}} \quad \boxed{\begin{minipage}{4.6 cm}$s$ = displacement in m\\\\$u$ = initial velocity in ms$^{-1}$\\\\$v$ = final velocity in ms$^{-1}$\\\\$a$ = acceleration in ms$^{-2}$\\\\$t$ = time in s (seconds)\end{minipage}}\)

When using SUVAT, assume the object is modeled as a particle and that acceleration is constant.

Acceleration due to gravity:  g = 9.8 ms⁻²

Resolving vertically, taking up as positive:

\(\begin{aligned}\textsf{Using} \quad v&=u+at:\\\\0&=9.5+(-9.8)t\\-9.5&=-9.8t\\t&=\dfrac{-9.5}{-9.8}\\t&=0.9693877551\\\implies t&=0.969\; \sf s\;(3\:s.f.)\end{aligned}\)

Therefore, it takes 0.969 s (3 s.f.) for the tennis ball to teach the top of its trajectory.

The magnitude of the angular momentum of the two-satellite system is best represented as, L=m₁v₁r₁-m₂v₂r₂.

The rotational analog of linear momentum is angular momentum also known as moment of momentum or rotational momentum.

It is significant in physics because it is a conserved quantity. the total angular momentum of a closed system remains constant. Both the direction and magnitude of angular momentum are conserved.

The magnitude of the angular momentum of the two-satellite system is best represented as;

L=∑mvr

L=m₁v₁r₁-m₂v₂r₂

Hence, the magnitude of the angular momentum of the two-satellite system is best represented as, L=m₁v₁r₁-m₂v₂r₂.

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The largest producer of primary air pollution in the United States is what? electricity producing plants.

Answer:

electricity production

Explanation:

The power of a motor that does 24 000 J of work in two minutes​ is 200 watts.

Power is the rate at which energy is transferred, used, or transformed. It is often measured in units of watts (W) or horsepower (hp). Power can also refer to the ability or capacity to do something, such as the power of a ruler to govern or the power of a machine to perform a specific task. In physics, power is defined as the amount of work done per unit of time.

The power output of that motor would be 24,000 joules per two minutes, or 12,000 joules per minute (24,000/2). To convert to watts, divide by the number of seconds per minute, which is 60. Therefore, the power output of the motor is 200 watts (12,000/60).  

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The complete question is:

To test the circuit breaker's tripping behavior, you can perform an overload test.

The following are the procedures for testing the circuit breaker:

Inspection:

Examine the circuit breaker for any visual harm or defects.

Ensure that all screws and terminals are secure and free of debris.

Continuity:

Use a multimeter to check the circuit breaker's continuity.

Ensure that there is continuity between the input and output wires of the circuit breaker and that the multimeter's resistance reading is zero when the breaker is closed.

Load:

Examine the circuit breaker's load-carrying capacity.

To do so, use a power source that is within the circuit breaker's current range and attach the circuit breaker to it.

As a result, the power source's current would flow through the circuit breaker.

Observe the tripping behavior:

After the power source has been connected, increase the current gradually to see if the circuit breaker trips at the appropriate value.

To do this, use a variable resistor or a load bank device to regulate the current flowing through the circuit breaker.

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Answer:

39,000 Joules of Work

Explanation:

Work can be found out through the change in Kinetic Energy.

W = ΔKE

Change in KE is:

\(W = KE_{Final} - KE_{Initial}\)

Expand the equation you get:

\(W=\frac{1}{2} mv^{2}_{f} -\frac{1}{2} mv^{2}_{i}\)

Plugin the known values and solve:

\(W=\frac{1}{2} (500)(16)^{2} -\frac{1}{2} (500)(10)^{2}\)

\(W=(250)(256) -(250)(100)\)

\(W=64000-25000\)

\(W=39000 J\)

Our Solar System is contained within the Milky Way galaxy, which gets its name from how it appears to us on Earth: a hazy ribbon of light visible in the night sky made up of stars that are too close together to be seen individually.

Our galaxy is around 100,000 light-years big and likely includes 100 to 400 billion stars. That sounds enormous, and it is—at least until we start putting it in the context of other galaxies.

The Milky Way is a massive cluster of stars, gas, and dust. Because it would appear to be a spinning pinwheel from the top or bottom, this galaxy is known as a spiral galaxy. About 25,000 light-years from the galactic center, on one of the spiral arms, is where the Sun can be found.

Spiral nebulae are objects that resemble spiral-shaped clouds but which are actually galaxies outside of our Milky Way galaxy.

Shapely asserted that what were then referred to as "spiral nebulae," such as Andromeda, are nearby and far smaller than the Milky Way, and that the Milky Way is so large that it is the main object in the cosmos.

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