A spacecraft with a BC = 1000 Pa enters the atmosphere of Mars on a ballistic trajectory at an altitude of 300 km with V = 6200 m/s and 6 = -15°. (a) Find V and dv/dt (in m/s, Earth g, and Mars g). (b) Find (dVidt)max and nmax and the corresponding V and h. (c) Ath 75 km, find V, dv/dt, and n.

Answer:

Red Volcano Rock and the Lava Rock Covered in Sulphur

Explanation:

Igneous Rocks are formed by volcanoes, lava, and magna. Sandstone is sedimentary and Slate is metamorphic. The other two are literally formed by volcanoes.

Answer:

Red Volcano Rock and the Lava Rock Covered in Sulphur

Explanation:

A terminology which best describes a person with vision of 20/220 in the better eye that is improved to 20/70 with glasses is: Partially sighted.

In Science, an eye can be defined as a spherical, hollow sensory organ which works in conjunction with a sensitive retina and other functionals parts that have the ability to receive visual images and signals (light), which are then carried to the brain for processing.

In Medicine, an individual with a vision of 20/220 is considered as being legally blind. However, a person who has 20/200 vision in the better eye is considered as being partially sighted because it can be improved to 20/70 through the use of medicated glasses.

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Complete Question:

Which term best describes a person with vision of 20/220 in the better eye that is improved to 20/70 with glasses?

Functionally blind

Low vision

Partially sighted

Tunnel vision

When the mass of the cannon increases and the energy of the blast remains the same, the total kinetic energy remains the same.

Kinetic energy refers to the form of energy that an object possesses due to its motion. It is known as the work that's required to move a body.

It should be noted that when there is an increase in the mass of the cannon while the energy of the blast remains the same, then in such a situation, the total kinetic energy will remain the same.

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According to the given statement we need a closed pipe with a length of 0.92 meters to produce a C sharp note with a frequency of 277 Hz.

To determine the length of a pipe that produces a C sharp note, we need to consider the frequency of the note and the speed of sound in air. C sharp has a frequency of 277 Hz, which means that the sound wave vibrates 277 times per second.
The formula to calculate the length of a closed pipe that produces a specific frequency is L = (4/3) x wavelength, where wavelength = 2 x length of the pipe. We can rearrange the formula to calculate the length of the pipe:
Length of pipe = wavelength/2 = (3/4) x wavelength
The wavelength of a sound wave can be calculated by dividing the speed of sound by the frequency of the note:
Wavelength = Speed of sound/frequency = 340 m/s / 277 Hz = 1.23 m
Therefore, the length of the pipe needed to produce a C sharp note with a frequency of 277 Hz is:
Length of pipe = (3/4) x 1.23 m = 0.92 m
In summary, we need a closed pipe with a length of 0.92 meters to produce a C sharp note with a frequency of 277 Hz.

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The velocity–time graph of the Lunar Landing Powered Descent that has a domain of 10 ≤ t ≤ 25, and a range of -2 ≤ v ≤ -40, between the 24th and the 25th seconds gives;

C) The Lander's velocity decreases away from the reference

A velocity time graph is a graph that shows the variation of the velocity of an object with time.

The information with regards to the lunar landing powered descent graph are;

Coordinate points on the graph;

(10, -2); At time t = 10 seconds, the average velocity, v = 0

(10.5, -40); The velocity relative to the starting point changed and decreased from 0 m/s to -40 m/s

(15, -5); The velocity increased from -40 m/s to -5 m/s

(22, -3); The velocity increases from -5 m/s to -3 m/s

(24, -2); The velocity increases from -3 m/s to -2 m/s

(25, -15); The velocity decreases from -2 m/s to -15 m/s

Therefore, taking the reference point as the point where the velocity is zero, 0, we have that between approximately 24 seconds and 25 seconds, the Lander's velocity decreases away from the reference.

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Answer:

The energy an object has due to its motion is called kinetic energy

Explanation:

Factors Affecting Kinetic Energy: the kinetic energy of an object depends on both its speed and its mass.

Answer:

kinetic energy

Explanation:

In physics, the kinetic energy (KE) of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.

Electron wavelengths are generally shorter than light wavelengths (option b). This is because electrons are much smaller particles than photons (the particles that make up light).

The wavelength of a particle is inversely proportional to its momentum, and since electrons have much higher momentum than photons, their wavelengths are much shorter. This is why electron microscopes are capable of much higher resolution than optical microscopes - the shorter wavelength of electrons allows for the observation of much smaller structures.

However, it is important to note that the wavelength of electrons can be controlled by adjusting their energy, and at very high energies, the wavelengths of electrons can become comparable to those of light. Overall, electron wavelengths are a fundamental property of quantum mechanics and play a crucial role in our understanding of the behavior of matter and energy at the atomic scale.

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Answer:

Density of the ship :133.33 kg/m³

Mass of the ship :50,000,000 kg

Ships are able to float on water because they displace a volume that equals  their own weight

Explanation:

The formula for density is ;

Density = Mass/Volume

But the mass of  displaced fluid is give by the formula;

m=ρV where ρ is density of the fluid and V is volume of water displaced

Volume of liner= 375000 m³

Volume displaced = 50000 m³

The volume of the water displaced is equal to mass of the liner

I m³ = 1000 kg

50000 m³ = 50000*1000 =50,000,000 kg

50,000,000 kg ----------mass of the ship

So if ;

m= 50,000,000 kg

v= 375000 m³

ρ = m/V

ρ = 50,000,000/375000

ρ = 50,000,000/375000

ρ =133.33 kg/m³

Ships are able to float on water because they displace a volume that equals  their own weight. Additionally, the air contained in the spaces of the ship inside is much less dense than density of water aiding in the floating process.

Answer:

uhm

Explanation:

the water cycle describes the continuous moving of water on earth with steps called evaporation condensation precipitation the other one

Answer:

The water cycle consists of Evaporation, Convection, Precipitation and Collection :3

Explanation:

:3

The largest earthquake in the world in 2016 occurred on 17 December in  Papua New Guinea and had a magnitude of 7.9 on the Richter scale.

An earthquake is defined as a natural disaster in which tectonic plates of the earth's crust suddenly move as a consequence of the release of pressure by contact, which may be associated with dramatic disasters. Earthquake power is measured as units on the Richter scale.

Therefore, with this data, we can see that the largest earthquake in 2016 occurred in Papua New Guinea (Oceania continent) and it had a magnitude of 7.9.

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The magnitude of the force exerted on the door by the woman is equal to the magnitude of the force exerted on the woman by the door.

Newton's third law of motion states that "For every action, there is an equal and opposite reaction." This means that when two objects interact, they apply equal and opposite forces on each other. The forces are proportional in magnitude and opposite in direction. This law helps to explain how objects react to forces and how forces result in motion

The door and the woman are interacting forces, and the magnitude of the force that each exerts on the other is equal. However, the direction of the forces is opposite. The woman is pushing the door in one direction, while the door is pushing back on the woman in the opposite direction.

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Answer:8.1g

Explanation:

Explanation:

you can find by using. volume = mass/ density of aluminium.

Given :

Height from which ball is dropped , h = 40 m .

Acceleration due to gravity , g= 10 m/s² .

Initial velocity , u = 0 m/s .

To Find :

Velocity when ball covered 20 m and velocity when it hit the ground .

Solution :

Now , height when ball covered 20 m distance is , 40 - 20 = 20 m .

By equation of motion :

\(v^2=u^2+2gh\\\\v=\sqrt{2\times 10\times 20}\ m/s\\\\v=20\ m/s\)

Now , distance covered when body reaches ground is , 40 m .

Putting value h = 40 m in above equation , we get :

\(v=\sqrt{2\times 10\times 40}\ m/s\\\\v=20\sqrt{2}\ m/s\)

Hence , this is the required solution .

Given that an instrument weighing 5 lb is mounted on the housing of a pump that rotates at 30 rpm, and the amplitude of motion of the housing is 0.003 ft, we can analyze the situation as follows:

1. The instrument weighs 5 lb.
2. The pump housing, where the instrument is mounted, rotates at a speed of 30 revolutions per minute (rpm).
3. The amplitude of the motion of the housing is 0.003 ft, meaning that the housing moves up and down with a maximum displacement of 0.003 ft from its equilibrium position during each rotation.

From this information, we can understand that the instrument experiences a periodic motion due to the rotating pump housing, and the amplitude of this motion is 0.003 ft.

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Answer:

B is 1

C is 2 I believe

D I'm pretty sure is 3

Explanation:

you can look the answers up :D!

Answer:

Explanation:

As she danced, Cinderella's foot got sweaty, providing lubrication, and while running her fit simply came out. She was likely barefoot in the slipper, so this makes sense. The Fairy Godmother designed the shoe to come off at the critical moment.

Answer:

1.2m/s

Explanation:

two speeds added together divided by total time.

Answer:

t = 8 s

Explanation:

In order to find the time taken by the dragster we will use equations of motion. Here, we will use second equation of motion:

s = Vi t + (1/2)at²

where,

s = distance covered = 320 m

Vi = Initial Velocity = 0 m/s (Since, dragster starts from rest)

t = time taken = ?

a = acceleration of dragster = 10 m/s²

Therefore,

320 m = (0 m/s)t + (1/2)(10 m/s²)t²

t² = (320 m)(2)/(10 m/s²)

t = √(64 s²)

t = 8 s

Answer:

t = 8 s

Explanation:

Answer:

Explanation:

The average temperatures in Flagstaff are lower than those in Phoenix primarily due to differences in elevation and geographical location.

Flagstaff is situated at a higher elevation, located in the northern part of Arizona at around 7,000 feet (2,100 meters) above sea level. On the other hand, Phoenix is located in the southern part of Arizona at a lower elevation of approximately 1,000 feet (300 meters) above sea level. Elevation plays a significant role in temperature variation because as elevation increases, the air becomes thinner and less dense. Thinner air has a lower capacity to retain heat, resulting in lower temperatures. In Flagstaff's higher elevation, the air is generally cooler compared to Phoenix. Additionally, the geographical location of Flagstaff and Phoenix also contributes to temperature differences. Flagstaff is situated in the Colorado Plateau, surrounded by mountains and forests. The presence of these geographical features can lead to cooler temperatures due to factors such as higher altitude, increased cloud cover, and more shaded areas. In contrast, Phoenix is located in the Sonoran Desert, which experiences higher temperatures due to its lower elevation and arid climate. Overall, the combination of higher elevation and geographical factors in Flagstaff results in lower average temperatures compared to the lower elevation and desert environment of Phoenix.

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The new frequency of the string that was tightened can be determined by analyzing the beats per second observed when both strings vibrate.

When two slightly different frequencies are played together, beats are heard, indicating an interference pattern. The number of beats per second is equal to the difference in frequency between the two strings. In this case, six beats per second are heard.

Since the original frequency of both strings was 819 Hz, and six beats per second are now heard, the frequency difference between the two strings is 6 Hz.

To find the new frequency of the tightened string, we subtract the frequency difference from the original frequency. Therefore, the new frequency of the tightened string is 819 Hz - 6 Hz = 813 Hz.

Therefore, the correct answer is (c) 813 Hz.

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The time it takes for an object to move from x = 0.0 cm to x = 5.3 cm depends on the velocity of the object. To calculate the time, we need to know the velocity of the object.

The time taken for an object to move from one position to another can be determined using the equation of motion:

x = ut + (1/2)at^2

where x represents the displacement, u is the initial velocity, t is the time, and a is the acceleration.

In this case, since we are given the initial position (x = 0.0 cm) and the final position (x = 5.3 cm), the displacement is given by:

x = 5.3 cm - 0.0 cm = 5.3 cm

To calculate the time, we need to know the velocity of the object. If the velocity is constant, then the acceleration (a) is zero, and the equation simplifies to:

x = ut

Since the acceleration is zero, the object is moving with constant velocity. Assuming the object is moving at a constant velocity v, we can rearrange the equation to solve for time:

t = x / v

Given that x = 5.3 cm, we need to know the velocity (v) of the object to calculate the time taken for the object to move from x = 0.0 cm to x = 5.3 cm.

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The potential to difference across each capacitor assuming the two capacitors are in parallel are;

The charge on each capacitor assuming the two capacitors are in parallel are:

C) The potential difference, p.d for the capacitors connected in series are inversely proportional to the capacitance and are as follows;

D) When the connection is parallel, the charge on each capacitor is shared as follows;

First, Total charge, Q = C(total) × V.

where, C(total) = (0.5×1.4)/(1.9) = 0.37-μF.

Q = 2.22C

Hence, the charge is shared as follows;

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Answer:

6.3 m/s

Explanation:

A student drops a wooden block from rest through a photogate 2 m below. Since there is a conservation of the gravitational potential energy and the kinetic energy, the final speed of the block is B. 6.3 m/s.

A wooden block is dropped from rest. If energy is conserved, the initial gravitational potential energy (U₁) will be equal to the final kinetic energy (K₂).

U₁ = K₂

m × g × h₁ = 1/2 × m × v₂²

where,

m × g × h₁ = 1/2 × m × v₂²

g × h₁ = 1/2 × v₂²

v₂ = √(2 × g × h₁)

v₂ = √(2 × (9.8 m/s²) × 2 m) = 6.3 m/s

A student drops a wooden block from rest through a photogate 2 m below. Since there is a conservation of the gravitational potential energy and the kinetic energy, the final speed of the block is B. 6.3 m/s.

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Answer:

In chaos theory , the butterfly effect is the sensetive dependence on initial conditions in which a small change in one state of a deterministic nonlinear can result in large difference in a letter state.

University Physics A displacement vector is also a vector quantity as well as the total of all vector quantities given a vector. Therefore, the effect of adding two displacement vectors is another displacement.

Written as d = (x2 - x1)i + (y2 - y1)j, the displacement vector d from P1 to P2 can be understood. The displacement, denoted by the symbol d, consists of (x2 - x1) units in the x-direction and (y2 - y1) units in the y-direction. d = (((x2 - x1)2 + (y2 - y1)2)12 represents the displacement's magnitude. The Pythagorean theorem leads to this.

The reason why displacement is a vector

A physical quantity with both directions and magnitude is referred to as a vector quantity. The fact that displacement has both a magnitude and a direction makes it a vector quantity.

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The thermal efficiency of the given heat engine is 47%, while the thermal efficiency of the corresponding Carnot cycle is 58.24%. The heat engine falls short of the Carnot efficiency, suggesting inefficiencies or design limitations.

(a) To determine the thermal efficiency of the given heat engine, we can use the formula:

Thermal Efficiency = (Net Work Output / Heat Input) * 100

The net work output can be calculated by subtracting the heat rejected from the heat input:

Net Work Output = Heat Input - Heat Rejected

Given:

Heat Input = 500 kW

Heat Rejected = 265 kW

Substituting these values into the formula, we have:

Net Work Output = 500 kW - 265 kW = 235 kW

Now, we can calculate the thermal efficiency:

Thermal Efficiency = (235 kW / 500 kW) * 100 = 47%

Therefore, the thermal efficiency of this cycle is 47%.

(b) The Carnot cycle is an idealized reversible heat engine that operates between two heat reservoirs. Its thermal efficiency can be determined using the formula:

Thermal Efficiency Carnot = 1 - (T_low / T_high)

Given:

T_low = 50°C + 273.15 = 323.15 K

T_high = 500°C + 273.15 = 773.15 K

Substituting these values into the formula, we have:

Thermal Efficiency Carnot = 1 - (323.15 K / 773.15 K) ≈ 0.5824 (58.24%)

Therefore, the thermal efficiency of the corresponding Carnot cycle is approximately 58.24%.

(c) Comparing the thermal efficiency of the given heat engine (47%) with the thermal efficiency of the Carnot cycle (58.24%), we can conclude that the heat engine is less efficient than the corresponding Carnot cycle. In theory, the maximum efficiency any heat engine can achieve is the Carnot efficiency when operating between the same temperature limits. The given heat engine falls short of the Carnot efficiency, indicating that it is not operating at the maximum possible efficiency.

This comparison suggests that the given heat engine may not be feasible or ideal. It could be due to factors such as irreversibilities, inefficiencies in the conversion of heat to work, or losses in the system. Improving the design or addressing these inefficiencies would be necessary to approach the ideal efficiency of the Carnot cycle.

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Answer:

Explanation:The Hertzsprung-Russell Diagram is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature and evolutionary stage. Stars in the stable phase of hydrogen burning lie along the Main Sequence according to their mass.

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