The ultrasound is reflected from the seafloor back to the submarine.

Use the correct answers below to complete the sentence.

A. Half
B. The same as
C. Twice

The total distance the ultrasound pulse travelled is......... the distance to the sea floor.

hand over hand steering.

When turning corners, use the hand-over-hand or grip and slide method. Do not turn the wheel with only the palm of your hand. Letting the wheel slip through your fingers could be dangerous.

Hand-over-hand steering is also useful when maneuvering in a space with limited view, such as perpendicular parking in a congested shopping center. When using hand-over-hand steering, quick movements of the hands are recommended on entry to the maneuver, with smooth slow movements when returning the wheel upon completion of the maneuver.

Hand-over-hand steering is appropriate when the speed of steering is critical, such as with skid recovery in a rear-wheel traction loss.

When making a slight turn, keep both hands in the same position on the wheel, making only slight finger or wrist adjustments as necessary to maintain your path of travel.

However, when moving through a turn, the hands may move up to 165 degrees (neither hand moves beyond the 6 or 12 o'clock positions).

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Energy is being produced in two different ways.

1st. when you run, exercise, etc allot of energy is being produced from your body in form of heat.

2nd. energy which is in form of coal, electricity, gas etc.

Definition: the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another.

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A promising evidence of a habitat that might support life on the planet Mars is water.

There is evidence supporting the existence of liquid water on Mars from numerous sources. The finding of repeated black streaks on Martian slopes and the presence of hydrated minerals suggest the potential of seasonal or location-specific briny water flows. A necessary component of life as known is liquid water.

Additionally, Mars possesses underground ecosystems that could provide defence against radiation and severe surface conditions. Researchers have found evidence of ancient underground hydrothermal systems as well as beneath ice. These settings might offer consistent conditions for the development of microbial life.  Methane gas has been found in the Martian atmosphere, along with variations over time, and this has led to questions regarding its origin. Both geological and biological processes can result in the production of methane.

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Answer:

supergiant

Explanation:

Answer:

the picture

Explanation:

you can see i got it right :)

The spring constant is 13.2 N/m. The correct option is c.

The equation for simple harmonic motion of a spring-mass system is x(t) = A cos(ωt + φ), where A is the amplitude, ω is the angular frequency, and φ is the phase angle.

Comparing this with the given equation, we can see that the amplitude A = 3.4.

The angular frequency can be calculated as ω = 2πf = 8.2 rad/s, where f is the frequency in Hz.

The mass of the particle is given as m = 0.5 kg.

The spring constant k can be calculated using the formula k = mω², where ω is the angular frequency.

Substituting the values, we get k = (0.5 kg) * (8.2 rad/s)² = 13.2 N/m.

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The acceleration of the car can be obtained as  0.26 m/s^2. The force required to ove it a distance of 30 m is 11760 N.

We know that the acceleration is the change in the velocity of the object with time. Now we know from the Newton law that the force is the product of the mass of the object and the acceleration.

Now we have that;

weight = mass * acceleration due to gravity

mass = weight/ acceleration due to gravity

mass = 12,000 N / 10 m/s^2

= 1200 Kg

The we know that;

Force = mass * acceleration

acceleration = Force/mass

=  310 N/1200 Kg

= 0.26 m/s^2

For the force that that is needed to move the car a distance of 30 m we have;

F = ma

= 1200 Kg * 9.8 m/s^2

= 11760 N

This is the force that ca move the object forward.

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Answer:

Explanation:

6.25

The magnitude of the centripetal force that must be applied is 6.25 N.

The given parameters;

The magnitude of the centripetal force that must be applied is determined by the product of the mass of the object and the centripetal acceleration.

The centripetal force is calculated as follows;

\(F_c = ma_c = \frac{mv^2}{r} \\\\F_c = \frac{0.5 \times 5^2}{2} \\\\F_c = 6.25 \ N\)

Thus, the magnitude of the centripetal force that must be applied is 6.25 N.

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Answer:

Explanation:

In an absolutely elastic collision, both momentum and kinetic energy are conserved. We can use these conservation laws to solve for the final velocity of the second ball after the collision.

Let's start by calculating the initial momentum of the system. The momentum (p) of each ball is given by the product of its mass (m) and velocity (v):

p1 = m1v1 = 0.2 kg × 9 m/s = 1.8 kg m/s

p2 = m2v2 = 0.1 kg × 0 m/s = 0 kg m/s (the second ball is stationary)

The total initial momentum of the system is:

p1 + p2 = 1.8 kg m/s + 0 kg m/s = 1.8 kg m/s

After the collision, the first ball bounces back with a velocity of 4 m/s. Let's call the final velocity of the second ball v2. The total final momentum of the system is:

p1' + p2' = m1v1' + m2v2'

where v1' = -4 m/s (negative sign indicates the opposite direction) and v2' = v2 (since the second ball continues to move in the same direction).

The total final momentum is also equal to the initial momentum, since momentum is conserved:

p1' + p2' = p1 + p2

m1v1' + m2v2' = 1.8 kg m/s

Now we can use the conservation of kinetic energy to solve for v2. The total initial kinetic energy (K) of the system is:

K = 0.5 m1v1^2 + 0.5 m2v2^2

Since the collision is absolutely elastic, the total final kinetic energy is the same as the initial kinetic energy:

K' = 0.5 m1v1'^2 + 0.5 m2v2'^2 = K

Substituting the given values, we get:

0.5 × 0.2 kg × (9 m/s)^2 + 0.5 × 0.1 kg × 0 m/s^2 = 0.5 × 0.2 kg × (4 m/s)^2 + 0.5 × 0.1 kg × v2'^2

Simplifying, we get:

81 J = 8 J + 0.05 kg v2'^2

Solving for v2', we get:

v2' = √(73.8) m/s ≈ 8.6 m/s

Therefore, the final velocity of the second ball after the collision is approximately 8.6 m/s.

We can use the principle of conservation of momentum to solve this problem. According to this principle, the total momentum of a system remains constant if there are no external forces acting on it.

In this case, we can consider the system to be the milk carton and the spitball, and we can assume that there are no external forces acting on them after the collision.

Let's denote the initial velocity of the spitball as vi and the final velocity of the combined milk carton and spitball as vf. Since the milk carton was initially at rest, its initial momentum is zero. Therefore, the initial momentum of the system is simply the momentum of the spitball before the collision, which is given by:

p = mv = (0.003 kg)(v) = 0.003v kg m/s

After the collision, the milk carton and the spitball stick together, so they move with the same final velocity vf. The total mass of the system is the sum of the masses of the milk carton and the spitball, which is:

m = 0.020 kg + 0.003 kg = 0.023 kg

According to the principle of conservation of momentum, the total momentum of the system after the collision must be equal to the initial momentum:

p' = m vf

where p' is the total momentum of the system after the collision.

We are given that vf = 0.32 m/s, so we can solve for p':

p' = m vf = (0.023 kg)(0.32 m/s) = 0.00736 kg m/s

Since momentum is conserved, we can equate p and p':

p = p'

0.003v kg m/s = 0.00736 kg m/s

Solving for v, we get:

v = 2.45 m/s

Therefore, the kid should hit the milk carton with the spitball at a speed of 2.45 m/s to achieve a final speed of 0.32 m/s for the combined system.

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the force between the two wires if they are separated by 2.50 cm is 0.525 N.

Given that force F between two parallel wires carrying electric currents is inversely proportional to the distance d between the wires and that a force of 0.750 N exists between wires that are 1.75 cm apart and that we are supposed to find the force between them if they are separated by 2.50 cm.

Let the initial force be F₁ and the initial distance be d₁.

Therefore, we can write the relationship between force and distance as;

F₁d₁ = F₂d₂

Where

;F₁ = 0.750 N (initial force)

d₁ = 1.75 cm (initial distance)

F₂ = ? (force at new distance)

d₂ = 2.50 cm (new distance)

Let us find F₂;F₁d₁ = F₂d₂F₂ = F₁d₁/d₂

Now substitute the values we know;

F₂ = (0.750 N x 1.75 cm) / 2.50 cmF₂ = 0.525 N

Therefore, the force between the two wires if they are separated by 2.50 cm is 0.525 N.

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(a) The minimum time interval needed before it can come to rest is t = 10.17 sec for a jet which is travelling at a a speed of 87 m/s, and its acceleration can have a maximum magnitude of 8.55 m/s2

(b) yes the jet can land on a small tropical island airport where the runway is 0.800 km long.

(c) The jet is safe to land.

Acceleration is the rate at which an object's velocity with respect to time changes. It is a vector quantity to accelerate (in that they have magnitude and direction). The direction of the net force acting on an object determines the direction of its acceleration. According to Newton's Second Law, an object's acceleration is the result of two factors working together: the object's mass, which varies depending on the materials it is made of, and the net balance of all external forces acting on it. The magnitude of an object's acceleration is inversely proportional to the object's mass.

The SI unit for acceleration is \(m/sec^{2}\).

Use the formula to calculate the time required to stop the jet

v = u + at

0 = 87 + (-8.55)t

t = \(\frac{87}{8.55}\)

t = 10.17 sec

Use the following formula to calculate the distance travelled by the jet is,

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

= \(( 87 \times 10.17) + \frac{1}{2} (-8.55) (10.17)^{2}\)

= 884.79 - 884.31

=.48m

Yes, the can land on a small tropical island airport where the runway is 0.800 km long.

The jet is safe to land.

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Answer:

D. flammability

Explanation:

I took the test and got it right

Answer:

The Sun looks bigger than other stars because it is so much closer to the Earth. The further away an object is, the smaller it appears, even if it is very big.

Explanation:

However, compared to other stars, our Sun is only a medium-sized star, meaning that some stars are much larger than the Sun and some are much smaller.

Answer:

However, compared to other stars, our Sun is only a medium-sized star, meaning that some stars are much larger than the Sun and some are much smaller. The Sun looks bigger than other stars because it is so much closer to the Earth. The further away an object is, the smaller it appears, even if it is very big.

Answer:

\(0.361\ \text{m}\)

Explanation:

\(f_s\) = Frequency of source = 375 Hz

\(\Delta f\) = Difference between the maximum and minimum sound frequencies = 2.75 Hz

v = Speed of sound in air = 343 m/s

T = Time period = 1.8 s

\(v_m\) = Maximum speed of the microphone

We have the relation

\(\Delta f=2f_s\dfrac{v_m}{v}\\\Rightarrow v_m=\dfrac{\Delta fv}{2f_s}\\\Rightarrow v_m=\dfrac{2.75\times 343}{2\times 375}\\\Rightarrow v_m=1.26\ \text{m/s}\)

Amplitude is given by

\(A=\dfrac{v_mT}{2\pi}\\\Rightarrow A=\dfrac{1.26\times 1.8}{2\pi}\\\Rightarrow A=0.361\ \text{m}\)

The amplitude of the simple harmonic motion is \(0.361\ \text{m}\).

Answer:

The power of the car, the gear ratio, weight of the car, aerodynamics of the car, grip of the tires on the road, calorific value of the fuel used, and friction would affect the speed of the car.

The type of structure that the dancing house has is a solid deconstructive structure owing to its unusual shape.

The river-facing building rises as a solid cylindrical concrete volume on the corner, where it connects with the steel and glass building. This is followed by a bigger façade that faces the river and is built on a base of 99 precast concrete panels and many windows.

Because to its odd shape, the architectural style is known as deconstructivist (or "new baroque" to the designers). 99 concrete panels with varying sizes and shapes support the "dancing" shape. There is a huge metal structure at the top of the building known as Medusa.

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Answer:

The total current in the circuit is the current that travels thru a single conductor that connects to the parallel circuit (current from a electromotive source, etc.)

I = I1 + I2 + I3 ...... In

If n items are in parallel with another, then I is the total current passing thru these items

Astronomers determined that the planet orbiting HD 209458 is a gas giant by observing its transit in front of the star and measuring the decrease in brightness, which indicates a large, gaseous planet.

In astronomy, transit refers to the passage of a celestial object, such as a planet, in front of a larger celestial object, such as a star, as viewed from a particular vantage point.

A gaseous planet is a large planet primarily composed of gas, such as hydrogen and helium, with little or no solid surface.

According to the given information:

Astronomers determined that the planet orbiting the star HD 209458 is a gas giant like Jupiter, rather than being made mostly of rocks or metals, through several methods. The key methods include analyzing the transit method and measuring the planet's mass and radius. By observing the star's light decrease as the planet passes in front of it, astronomers could calculate the planet's size. Combining this information with the radial velocity method, which measures the star's wobble due to the planet's gravitational pull, allowed astronomers to estimate the planet's mass. Comparing these values led to the determination that the planet has a low density, indicating it is a gaseous planet like Jupiter and not composed mainly of rocks or metals.

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Answer:

Forces Acting in Opposite Directions

In general, whenever forces act on an object in opposite directions—like the book on the table—the net force is equal to the difference between the two forces. In other words, one force is subtracted from the other to calculate the net force.

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The tension in the rope when the box is at rest will be equal to the weight of the box, which is acting in the opposite direction to the tension. In other words, the tension is equal and opposite to the weight of the box, resulting in a net force of zero and the box being at rest.

When an object is at rest, the forces acting on it must be balanced. For a box suspended by a rope, the forces acting on it include gravity and tension. Gravity is pulling the box downwards, while tension in the rope is pulling it upwards. The box is at rest, which means the net force acting on it must be zero. This can be represented by the equation: Fnet = ma = 0 where Fnet is the net force, m is the mass of the box, and a is the acceleration. Since the box is at rest, acceleration is zero, and Fnet must be zero as well. Therefore, the tension in the rope must be equal to the weight of the box, which is given by: Fg = mg where Fg is the force of gravity and g is the acceleration due to gravity, which is approximately 9.8 m/s^2. To find the tension, we can set Fg equal to the tension:

T = Fg = mg = (10 kg)(9.8 m/s^2) = 98 N

Therefore, the tension in the rope when the box is at rest is 98 N.

Thus, the tension in the rope when the box is at rest is 98 N.

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Having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.Kinetic theory of matter is the explanation of how particles in matter behave.

The kinetic theory explains that particles in matter are always in constant motion. The movement of these particles depends on the temperature and phase of matter.Particles in a solid state move slower than particles in a liquid state. Also, particles in a liquid state move slower than particles in a gaseous state. The faster the particles are moving, the higher the temperature.This means that having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.

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Answer:

First, as you may know, the light travels at a given velocity.

In vaccum, this velocity is c = 3x10^8 m/s.

And we know that:

distance = velocity*time

Now, if some object (like a star ) is really far away, the light that comes from that star may take years to reach the Earth.

This means that the images that the astronomers see today, actually happened years and years ago (So the night sky is like a picture of the "past" of the universe)

Also, for example, if an astronomer sees some particular thing, he can apply a model (a "simplification" of some phenomena that is used to simplify it an explain it) and with the model, the scientist can infer the information of the given thing some time before it was seen.

The astronomers could know what was happening inside galaxies way back then by the fact that;

they examine the spectra of galaxies (or the overall colors of galaxies) with the highest redshifts they can find

Astronomers Measure the wavelength of the light that is stretched, so the light is seen as 'shifted' towards the red part of the spectrum by using spectroscopy. This measure is also called redshift.

This invokes a ray of light through a triangular prism that splits the light into various components known as spectrum.

The way the astronomers could use this concept to know what was happening in the galaxies before is by examining the spectra of galaxies that have the highest redshifts.

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The final velocity of the ball, given that it was thrown downwards with a velocity of 1.5 m/s is 27.078 m/s

First, we shall list out the various parameters given from the question. This is given below:

The final velocity of the ball can be obtained by using the following equation of motion:

v = u + at

Inputting the values, we have:

v = 1.5 + (9.8 × 2.61)

Clear bracket

v = 1.5 + 25.578

v = 27.078 m/s

Thus, from above calculation, it is evident that the final velocity of the ball is 27.078 m/s

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Answer:

[1, 6, -2]

Explanation:

Given the following :

Initial Position of spaceship : [3 2 4] km

Velocity of spaceship : [-1 2 - 3] km/hr

Location of ship after two hours have passed :

Distance moved by spaceship :

Velocity × time

[-1 2 -3] × 2 = [-2 4 -6]

Location of ship after two hours :

Initial position + distance moved

[3 2 4] + [-2 4 -6] = [3 + (-2)], [2 + 4], [4 + (-6)]

= [3-2, 2+4, 4-6] = [1, 6, -2]

The location of the spaceship after 2 hours have passed is [1, 6, -2]

Since

Initial Position of spaceship : [3 2 4] km

Velocity of spaceship : [-1 2 - 3] km/hr

Now

Location of the ship after two hours should have passed

So,

Distance moved by spaceship should be

= Velocity × time

= [-1 2 -3] × 2

= [-2 4 -6]

Now

Location of ship after two hours should be

= Initial position + distance moved

= [3 2 4] + [-2 4 -6]

= [3 + (-2)], [2 + 4], [4 + (-6)]

= [3-2, 2+4, 4-6]

= [1, 6, -2]

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Answer:

The second law of motion states that the force of an object is equal to its mass times its

acceleration.

o A change in motion occurs only if a net force is exerted on an object.

o A net force changes the velocity of the object, and causes it to accelerate.

o If an object is acted upon by a net force, the change in velocity will be in the

direction of the net force.

o The acceleration of an object depends on its mass.

o The more mass an object has or the more inertia it has, the harder it is to

accelerate.

o More mass means less acceleration if the force acting on the objects is the same.

Explanation:

Explanation:

The force exerted by the earth on a falling baseball is smaller than the force exerted by the earth on a falling bowling ball.  However, since the baseball has less mass than the bowling ball, the two accelerate at the same rate.  This is known as Galileo's gravity experiment, but it also demonstrates Newton's second law.

When a bowling ball hits a pin, the pin pushes back with equal and opposite force.  Because the bowling ball has a large mass, the acceleration caused by the force is small.  Since the pin has a small mass, the acceleration caused by the force is large.

Answer: 29.23 m/s^2

Explanation:

Answer:

9.8 N downward

Explanation:

The weight force is defined as w = mg, where m is the mass of the object and g = 9.8 m/s^2. Plugging in values shows that the force exerted on the ball is 9.8 N, downwards toward the ground.

A wave that remains in a constant position is referred to as a stationary wave or a standing wave.

It is formed by the superposition of two waves with the same frequency and amplitude traveling in opposite directions. Unlike a traveling wave that moves through space, a standing wave appears to be stationary because the wave peaks and troughs oscillate in place.

The formation of a standing wave occurs when a wave reflects back upon itself, interacting constructively and destructively with the incoming wave. This phenomenon is characterized by the presence of nodes and antinodes. Nodes are points along the wave where the amplitude is always zero, resulting from destructive interference between the two waves. Antinodes, on the other hand, are points of maximum displacement, created by constructive interference..

Standing waves have significant implications in various fields of study. In physics and engineering, they are essential in the analysis of acoustics, optics, and electromagnetic fields. They find applications in musical instruments, where standing waves inside the instrument's resonating body create distinct harmonics and produce specific musical tones.

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The given statement that net electric flux crossing an open surface is never zero, is false.

The net electric flux of an electric field through a closed surface is equal to the enclosed charge, divided by the permittivity of the free space. Where charge is taken in the unit of coulombs.

The net electric flux cross an open surface can also be zero if the is perpendicular to the direction of the field. In other word if the field lines are parallel to the surface. Electric flux is a scaler quantity. The SI unit of electric flux is N-m²/C.

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