Pregunta 2
George took his puppy to a dog park and unleashed her once they entered the gate. The puppy accelerated Northward, from rest, to 15 meters per second in 10
seconds. What was China's displacement in this time interval?

Answer:

100 m/s ÷ 8 = 12.5 m/s

Explanation:

You must put multiply (÷)

Given, Speed of the sound, v=675 m/s

The wavelength of the wave, λ=15 m

Relation between speed, wavelength, and frequency of a wave is given by

Where f is the frequency of the sound.

On substituting the known values,

Which gives us,

Therefore the frequency of the sound in the given medium is 45 Hz.

If we have a new moon today, we will have the next full moon in about 2 weeks.

The midpoint of the cycle (half of 30 = 15) is marked by the full Moon, which occurs approximately 15 days (14.8 to be exact) following the new moon. Similar to the New Moon phase, the Moon is once again in alignment with the Earth and Sun during full moon.

However, this time, the Moon is on the other side of the Earth, thus the full area of the Moon that is illuminated by the Sun is facing us. Immediately following this brief interval, visibility starts to decline.

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Answer:

B. 40m

Explanation:

Projectile motion is  a motion where an object moves in a bilaterally symmetrical path

Projectile motion is a form of motion experienced by an object or particle that is projected near Earth's surface and moves along a curved path under the action of gravity only.

If an object is thrown up by making a certain angle with respect to  ground ( let say theta) up in the sky , it will reach a maximum height after which it follows a symmetrical path as it comes down due to  the action of gravity . The path followed from the beginning till end will be a parabolic in this case .

It is a motion where an object moves in a bilaterally symmetrical path .

Projectile motion only occurs when there is only one force applied at the beginning of the trajectory, after been released object comes in the action of gravity .

General form of equation of trajectory  of Projectile motion   can be written as :

y = x tan(theta ) - g(x^2)/(2(u^2)cos^2(theta))

where y = horizontal component

           x = vertical component

           g = gravity

           u = initial velocity

           theta = angle of inclination of the initial velocity from horizontal axis

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According to the question the new root-mean-square speed of the molecules is 2v.

Molecules are groups of atoms that are bound together by chemical bonds. These bonds can be either covalent or ionic depending on how the atoms interact. Molecules can range in size from a single atom to very large and complex structures. Molecules are the basic building blocks of all matter, and they make up all of the things around us, from the air we breathe to the food we eat.

The root-mean-square speed of the molecules of an ideal gas is given by the formula v=√(3RT/M), where R is the ideal gas constant, T is the absolute temperature, and M is the molar mass of the gas. Since the temperature does not change when the gas is compressed, the root-mean-square speed remains proportional to the square root of the molar mass. Since the volume is reduced by half, the molar mass is doubled, and thus the root-mean-square speed is doubled (2v).

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Answer:

The answer is 2,500 * 45 = 112500kgm/s

Work done by a system when a piston expands:

Work = -P * ΔV = -(14.89 atm) * (63.28 L) = -941.7652 atm·L

To calculate the work done by the system, we can use the formula:

Work = -P * ΔV

where P is the pressure and ΔV is the change in volume.

Given:

Initial volume (V1) = 13.27 L

Final volume (V2) = 76.55 L

Pressure (P) = 14.89 atm

The change in volume is calculated as:

ΔV = V2 - V1 = 76.55 L - 13.27 L = 63.28 L

Now we can calculate the work:

Work = -P * ΔV = -(14.89 atm) * (63.28 L) = -941.7652 atm·L

Note: The work is negative because the system is doing work against the external pressure.

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Answer:they are a renewable source

Explanation: because they come from the ocean and the ocean is 75% of the world so there will always be waves.

Answer:

324 J

Explanation:

KE= 1/2 m*v^2

1/2*8*9^2

324 joules (=^w^=) woof woof

Answer:

If an object has a fast velocity, the dots on a ticker tape diagram will be far apart.

Answer:

Explanation:

The mass of the object can be found by using the formula

\(m = \frac{p}{v} \\ \)

p is the momentum

v is the velocity

From the question we have

\(m = \frac{10}{20} = \frac{1}{2} \\ \)

We have the final answer as

Hope this helps you

Answer:

We're supposed to write a 4-5 paragraph essay for only 6 points...sorry but no

Explanation:

The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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Low mass stars, such as the Sun, are unable to directly fuse elements beyond oxygen in their cores. However, during the later stages of their evolution, these stars can still produce heavier elements through a process called nucleosynthesis.

This occurs through the combined effects of stellar winds, mass loss, and interactions with other elements in the stellar atmosphere.  As low mass stars evolve, they enter a phase called the asymptotic giant branch (AGB), during which they experience significant mass loss through stellar winds. These winds carry with them the enriched material created through previous fusion processes. When the lost material mixes with the stellar atmosphere, it undergoes various nuclear reactions, such as neutron capture and beta decay, which can lead to the synthesis of heavier elements.

This nucleosynthesis process in dying low mass stars is responsible for the creation of orange-colored elements, such as carbon, nitrogen, and heavy metals like gold and lead. While the stars themselves cannot directly fuse elements beyond oxygen, the intricate interplay of stellar winds, mass loss, and atmospheric interactions enables the production of heavier elements.

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Answer: 12.44 millisecond

Explanation:

Based on the information given, to know the time taken for the impulse, which travels a distance of 1.58m to reach the brain will be:

Time taken = Distance/Speed

Time taken = 1.58/127

Time taken = 0.01244

Time taken = 12.44 millisecond.

Answer:

Gravity is a natural phenomenon that causes all massive objects to attract each other. The magnitude or force of this interaction depends on the masses and distance of the bodies. This causes objects to fall toward Earth, for example, and keep satellites and celestial bodies in their orbits, such as the Earth's orbit around the Sun. Gravity also causes the tidal phenomenon.

In physics, gravity can be approximated by Isaac Newton's laws of gravity. Although the accuracy of the law is sufficient, for example, when calculating the orbits of spacecraft, gravity is best described by Albert Einstein’s general theory of relativity, in which it is considered the curvature of space-time.

48 m/s in terms of km/h is 720.8 km/h. In terms of m/min is 2880 m/min, in terms of km/s is 0.048 km/s and in terms of km/min is 2.88 km/min.

To solve this question, we need to understand some terms. The unit of velocity is measured in m/s. It can be expressed in different units of velocity.

1 km (kilometer) = 1000 meter

1 h (hour) = 3600 seconds

1 minutes = 60 seconds

To convert m/s into km/h,

48 m/s * 3600/1000 =  172.8 km/h

To convert m/s into m/min,

48 m/s * 60 = 2880 m/min

To convert m/s into km/s,

48 m/s ÷ 1000 = 0.048 km/s

To convert m/s into km/minutes,

48 m/s * 60 / 1000 = 2.88 km/min

Therefore, the 48 m/s expressed is 172.8 km/h, 2880 m/min, 0.048 km/s and 2.88 km/min.

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48 m/s is equivalent to  172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.

To express 48 m/s in different units of velocity:

km/h (kilometers per hour):

To convert m/s to km/h, we can use the conversion factor of 3.6 since 1 m/s is equal to 3.6 km/h.

48 m/s * (3.6 km/h / 1 m/s) = 172.8 km/h

Therefore, 48 m/s is equivalent to 172.8 km/h.

m/min (meters per minute):

To convert m/s to m/min, we can use the conversion factor of 60 since there are 60 seconds in a minute.

48 m/s * (60 m/min / 1 s) = 2880 m/min

Therefore, 48 m/s is equivalent to 2880 m/min.

km/s (kilometers per second):

Since 1 kilometer is equal to 1000 meters, to convert m/s to km/s, we divide the value by 1000.

48 m/s / 1000 = 0.048 km/s

Therefore, 48 m/s is equivalent to 0.048 km/s.

km/minute (kilometers per minute):

To convert m/s to km/minute, we first need to convert m/s to km/s (as calculated in the previous step) and then multiply by 60 to convert seconds to minutes.

0.048 km/s * 60 = 2.88 km/minute

So, 48 m/s is equivalent to 2.88 km/minute.

Hence, 48 m/s is equivalent to approximately 172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.

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The component form of the velocity of the airplane is (-102.9 km/hr, 280.7 km/hr). This means the airplane is moving approximately 102.9 km/hr to the west and 280.7 km/hr to the north.

To find the component form of the velocity of the airplane, we need to break down the given velocity into its horizontal and vertical components.

Given that the airplane is traveling at a speed of 300 km/hr in the direction 20° west of north, we can represent this velocity as follows:

Magnitude of the velocity = 300 km/hr

Direction of the velocity = 20° west of north

To find the horizontal component, we need to determine the projection of the velocity vector onto the positive x-axis (east direction). Since the direction is west of north, the horizontal component will be negative. Using trigonometry, we can calculate:

Horizontal component = 300 km/hr * sin(20°) ≈ -102.9 km/hr

To find the vertical component, we need to determine the projection of the velocity vector onto the positive y-axis (north direction). Since the direction is north, the vertical component will be positive. Using trigonometry, we can calculate:

Vertical component = 300 km/hr * cos(20°) ≈ 280.7 km/hr

Therefore, the component form of the velocity of the airplane is (-102.9 km/hr, 280.7 km/hr). This means the airplane is moving approximately 102.9 km/hr to the west and 280.7 km/hr to the north.

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Explanation:

Vf=Vi+at

reference frame,take down as positive in y- axis

Data

Vi=0m/s

Vf=?

a=g(9.8m/s2)

t=6s

Vf=0+9.8m/s2*6s

Vf=58.8m/s

The velocity of the object after falling for 6 s from a high building is 58.8 m/s

Initial velocity (u) = 0 m/s

Time (t) = 6 s

Acceleration due to gravity (g) = 9.8 m/s²

v = 0 + (9.8 × 6)

v = 0 + 58.8

Therefore, the velocity of the object after falling for 6 s is 58.8 m/s

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Answer:

A

Explanation:

The expected ratio of free-hanging earlobes to attached earlobes in the offspring is 1:2.

The diagram depicts a Punnett square used to predict the earlobe shape of two parents' offspring. The capital A represents free-hanging earlobes, while the lowercase a represents attached earlobes.

The Punnett square is a square diagram used to predict genotypes of a specific cross or breeding experiment. It is named after Reginald C. Punnett, who invented it in 1905. Biologists use the diagram to calculate the likelihood of an offspring having a specific genotype.

In this case, the genotype rato based on the attached diagram is 1:2.

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Answer:

they are

Explanation:

1.Frictional force

2.Applied force

3.Normal force

Answer:

D) the moon would stay in one position relative to earth and sun

if the moon were always opposite the sun we would always see a full moon

The sun rotates about the earth once every 366 days (if the earth did not rotate we would see a complete rotation of the sun every 366.25 days)

In one year there 365.25 rotations of the sun about the earth

366.25 days for the earth to rotate - 1 day because of the earth about the sun = 365.25 the length of a day that we observe

(Note the difference between a "sidereal" day and an "astronomical" day)

The Correct Sequence is:

What is the Scientific method?

The scientific method is the approach that scientists use to understand, answer, and explain natural phenomena and events.

The method follows a series of steps that begin with observation, asking questions, conducting background research, and leading to the formation of hypotheses that deny the possibility of explaining the phenomenon to its limits.

Explanation:

Hypotheses are then tested by experiments, and results can be provided to prove or disprove the hypothesis. Results are analyzed and conclusions are drawn based on them. After analyzing the results needs to published and communicated.

Hence, the following is the correct sequence.

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A student writes down several steps of the scientific method , the correct order of steps are discussed below

The proper order is:

1.Make a hypothesis.

2.Conduct an experiment.

3.Analyze the experimental data.

4.Communicate the results.

Experiments are used to test hypotheses, and the results can either support or refute the hypothesis. On the basis of the results, conclusions are drawn. The results must be published and communicated after they have been analyzed.

Therefore, the order that follows is correct.

Scientists use the scientific method to comprehend, respond to, and explain natural phenomena and events. The method involves observing the phenomenon, asking questions, conducting background research, and coming up with hypotheses that deny the possibility of fully explaining it.

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Answer: He's a superhero in a fictional world

Explanation: Superheroes, such as Superman and Flash, defy physics because they were created as a form of entertainment. The DC world isn't realistic. Don't think too much on it.

Answer:

Explanation:

Given,

Mass ( m ) = 10 kg

Force ( f ) = 2 Newtons

Acceleration ( a ) = ?

Now, let's find the acceleration :

We know that,

\(f = ma\)

Plug the values

\(2 = 10a\)

Swap the sides of the equation

\(10a = 2\)

Divide both sides of the equation by 10

\( \frac{10a}{10} = \frac{2}{10} \)

Calculate

\(a = 0.2 \: {metre \: per \: second \: }^{2} \)

Hope this helps...

Best regards!!

The magnitude of the rock's (assumed) uniform acceleration is v² - 225.

Initial speed, u = 15 m/s

Displacement, s = 50 cm = 0.5 m

Magnitude of acceleration, a = ?

We know, v² - u² = 2as

Let's substitute the given values into the above formula. v² - u² = 2as (v is the final velocity)

Final velocity, v = ?u = 15 m/s (Initial velocity)

s = 0.5 m (Displacement)

a = ?

v² - u² = 2as (v² - u²)/2s = a(v+u)/2(a = (v² - u²)/2s)

(a = (v² - u²)/2s)(a = (v² - (15 m/s)²)/2(0.5 m))(a = (v² - 225)/1)(a = v² - 225)

Therefore, the magnitude of the rock's  uniform acceleration is v² - 225, given that a rock hits the ground at a speed of 15 m/s and leaves a hold 50 cm deep after it hits the ground.

The magnitude of the rock's  uniform acceleration is v² - 225.

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The resultant in magnitude was found to be 110 N and the direction was found to be north west.

what are the types of forces ?

Spring Tension

This force acts in the opposite direction of molecular displacement. As in a spring or an elastic rubber band, for example.

Force Applied

The force exerted by our muscles is known as applied force. It is also known as muscular force. For instance, moving a box or kicking a ball.

Air Defense Force

The force exerted by a gas acting in the opposite direction on a body is known as air resistance force. Examples are the forces encountered by a skydiver or a downhill skier, among others.

Normal Strength

It is the force that acts when two surfaces come into contact. This force is perpendicular to the surface and acts in the outward direction. For instance, a box on top of a table.

Tension Force

A rope or thread holding an item experiences this form of force. The tension force is always a pull, never a push. The tensile force is constant throughout the cable. Consider a ball suspended from a string.

Frictional Force

Frictional force is generated when items on a surface attempt to move relative to the surface. For example, when a package is slid over a table.

Electromagnetic Force

These are the electromagnetic and electric interactions between atoms and molecules that aid in the bonding and definition of solid structures. Poles, for example, attract each other in a magnet.

Gravitational Force

The gravitational force can be defined as the force is acting among objects owing to the existence of matter.

therefore the resultant magnitude and the direction was 110N and the direction was north west.

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Answer:

\(F=F_{f}=1171.5 N\)

Explanation:

We know that the sailboat has a uniform movement, therefore the total force, the engine, and the wind must be equal to the friction force.

\(F=F_{f}\)

\(F=F_{f}=\sqrt{F^{2}_{engine}+F^{2}_{wind}}\)

\(F=F_{f}=\sqrt{900^{2}+750^{2}}\)

\(F=F_{f}=1171.5 N\)

Therefore the friction force is 1171.5 N.

I hope it helps you!