Why is there more pressure the deeper you go in water?

Answer:

Place the object on the disk and measure the distance from the center of the disk to the center of mass of the object by using a meterstick. Slowly increase the rate the disk rotates until the object begins to slide off the disk. Record the time in which the object makes one revolution around the center of the disk.

Explanation:

Draw a free body diagram.  There are three forces:

Weight force mg pulling down,

Normal force N pushing up,

Friction force Nμ pushing towards the center.

Sum of forces in the vertical direction:

∑F = ma

N − mg = 0

N = mg

Sum of forces in the centripetal direction:

∑F = ma

Nμ = m v²/r

mgμ = m v²/r

gμ = v²/r

μ = v² / (gr)

It takes T seconds for the object to move 2πr meters.

v = 2πr / T

Substituting:

μ = (2πr / T)² / (gr)

μ = 4π²r / (gT²)

The measurements you need are the distance between the object and the center of the disk (r) and the time it takes for one revolution (T).

Answer:

its very important in science because without atoms the universe would have not been created and our sun and our own planets

The nuclear reactions generally occurs in the deep part of the earth called the core. It is the fusion reaction which produce huge amount of energy to the universe. So the nuclear reactions important to the universe.

The process in which two lighter nuclei fuse together to form a heavier nucleus with the simultaneous release of a huge amount of energy is defined as the nuclear fusion. Some mass is always lost which is converted into energy in accordance with Einstein's equation.

It is the fusion reactions which are common in the interior of stars. The energy of our sun is believed to arise from a number of complex fusion steps. The sun is the ultimate source of energy in the universe which is due to the fusion reaction.

The nuclear reactions are responsible for the nucleosynthesis which means the formation of the elements in the universe.

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Answer:

Velocity/time =acceleration

Acceleration x time = velocity

Velocity/acceleration=time

The conversation of seawater or brackish water to fresh water is called desalination. Option C is the correct answer.

Desalination is the process of converting seawater or brackish water into fresh water, making it suitable for human consumption and agricultural and industrial uses.

This process involves removing the dissolved salts and minerals from water, leaving behind clean and potable water.

Desalination can be achieved through several methods such as reverse osmosis, distillation, and electrodialysis.

Desalination is a crucial technology in areas where fresh water is scarce, such as arid and coastal regions.

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Based on their observations at the amusement park, the hypothesis that would be best supported by evidence is likely

option B: gravity provides the force needed to move the car throughout the entire ride.

This is because the students would have observed that the rollercoaster car relies on the force of gravity to move along the tracks and provide the thrill of the ride. The other hypotheses may have some merit, but they may not be as strongly supported by the evidence observed during the students' visit to the amusement park.

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The term you are looking for is "chemical battery". Chemical batteries work by converting chemical energy into electrical energy through a series of chemical reactions. These reactions take place within the battery's cells, which are composed of two electrodes and an electrolyte.

When the battery is connected to a circuit, the chemical reactions produce an electrical current that can be used to power devices. Chemical batteries are widely used in many applications, including consumer electronics, electric vehicles, and renewable energy systems. They are a crucial component of our modern technological society, and ongoing research is focused on developing more efficient and sustainable battery technologies to meet growing energy demands.

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At a depth of 500 meters in the mine, the estimated vertical stress is 13.5 MPa, and the estimated horizontal stress is 11.57 MPa. Specific details to consider are Chalk Strength, Chalk Permeability, Chalk Heterogeneity.

Before proceeding with the excavation of the cavern beneath the sea, the main geological information that would be important to have includes the properties and characteristics of the chalk formation. Some specific details to consider are:

a) Chalk Strength: It is essential to determine the strength and stability of the chalk formation to ensure that it can support the excavation without collapsing or experiencing excessive deformation. This would involve assessing parameters such as the cohesion, friction angle, and compressive strength of the chalk.

b) Chalk Permeability: Understanding the permeability of the chalk is crucial, especially since the cavern will be beneath the sea. The permeability will impact the water flow within the chalk and may affect stability, seepage, and potential groundwater inflow into the excavation.

c) Chalk Heterogeneity: Chalk formations can exhibit variations in their composition, including the presence of layers or discontinuities such as faults or joints. Understanding the geological structure and heterogeneity of the chalk will help in assessing the potential for rock mass instability, water ingress, or the presence of other geological hazards.

To estimate the vertical and horizontal in-situ stresses at a depth of 500 meters in the mine, we can use the principles of rock mechanics and consider the given parameters.

Vertical Stress:

The vertical stress is the stress component acting vertically downward due to the weight of the overlying rock. It can be calculated using the average unit weight of the rock and the depth.

Vertical Stress = Unit Weight of Rock × Depth

Vertical Stress = 27 kN/m³ × 500 m

Vertical Stress = 13,500 kN/m² or 13.5 MPa

Horizontal Stress:

The horizontal stress can be estimated using the in-situ stress ratio, which is influenced by Poisson's ratio. The relationship between the horizontal and vertical stresses can be expressed as:

Horizontal Stress = Vertical Stress × (2 × Poisson's Ratio) / (1 - Poisson's Ratio)

Horizontal Stress = 13.5 MPa × (2 × 0.3) / (1 - 0.3)

Horizontal Stress = 13.5 MPa × 0.6 / 0.7

Horizontal Stress = 11.57 MPa

Therefore, at a depth of 500 meters in the mine, the estimated vertical stress is 13.5 MPa, and the estimated horizontal stress is 11.57 MPa.

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Answer:

A1 = π R^2        original area

A2 = π (R + ΔR)^2        area of hole increased in radius by ΔR

A2 - A1 = π (2 R ΔR + ΔR^2) change in area due to heating

Δ A = π 2 R ΔR           ΔR^2 is small and will be omitted

ΔR = R c ΔT        where ΔT is the temperature change

Thus the coefficient of area expansion is twice that of the coefficient of linear expansion

This Process is called Dehydration.

The definition of Dehydration is: The loss or removal of water from something.

so just remember that next time you need something like that <3

Answer: C-Dehydration

Explanation:

Sulfuric acid is also used to prepare other acids and to serve as a dehydrating agent. Dehydrate means to take water away.

Hope this helps!

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a. (ii) Savery engine - The boiler could not withstand the steam pressure needed to lift water beyond 6 m.

b. (i) Gun powder engine - The engine had no mechanism to move the piston back to complete a cycle.

c. (iii) Newcomen engine - The continual reheating needed after each cooling of the engine cylinder required a tremendous amount of thermal energy.

d. (iv) Watt engine - This engine was large and massive and less efficient than thought possible.

Explanation:

a. Creating a lower vacuum in Savery engine causes more water to evaporate and limits the pressure differential. Practically, Savery's device was limited to 20-25 feet of suction (20 feet = 6 m).

b. The explosion of gun powder, in the gunpowder engine, forces the piston upwards for the gas to escape from the tube. Gravity and air pressure then pull the piston back. It then lifts another weight when it reaches the bottom, it explodes again and the cycle restarts.

c. The Newcomen engine operates by condensing steam drawn into the cylinder, thereby creating a partial vacuum which requires continual reheating after each cooling and a tremendous amount of thermal energy.

d. Watt's engine was able to convert around 2% of the thermal energy in steam to work. Later, the efficiency of this engine was increased to approximately 17%.

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When the angle between the Sun and a rescue aircraft is 54 degrees, the angle of incidence for sunlight on a plane mirror should be 54 degrees. This is because the angle of incidence equals the angle of reflection when light rays strike a plane mirror at normal incidence. This means that the reflected light will also form an angle of 54 degrees with the aircraft's axis, and hence the rescue pilot will be able to see the reflected light. The angle of incidence is the angle between a light ray and the normal to the surface at the point where it meets the surface. It is denoted by the symbol i. The angle of reflection is the angle between the reflected light ray and the normal to the surface at the point where it meets the surface. It is denoted by the symbol r.

According to the law of reflection, the angle of incidence is equal to the angle of reflection. This means that if light rays strike a plane mirror at normal incidence, the angle of incidence will be equal to the angle of reflection, and hence the reflected light will be seen by the observer.

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An audience member covers her ears during a loud concert shows evidence that matter can reflect waves.

An audience member covers her ears during a loud concert is an event that provides evidence that matter can reflect waves because a sound is heard again and again due to the reflection of waves. This repetition of sound is due to the property of reflection of sound waves.

So we can conclude that an audience member covers her ears during a loud concert shows evidence that matter can reflect waves.

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Answer:

A laser beam bounces off a series of mirrors

Explanation:

Answer:

When like charges come together, they repel each other. For instance, when the north and south poles of a magnet come together, they push each other apart. The like poles in the magnet repel each other and unlike poles attract each other much. The same reaction occurs in like and unlike charges. Also, the repulsion acts along the line between the two charges.

Answer: (b) the night would be half as long

Explanation: As the earth, if rotated twice as fast than it does now and the sun stayed the same then the night would be as half as long as the rotation of the planet on its axis would be double to that of its and 12 hours of night would be as long as the speed of the axial rotation.

Answer: The velocity of the bullet will be more than half of its earlier velocity

Explanation: I did it on a test and it was right because i calculated 30 degrees within 25 seconds and it was half times the velocity

i hope this helps sorry if i got it wrong

it takes 6 hours to travel back to Hyderabad

Answer:

The amount of solid ice remaining after 6 hours is approximately 3.68664 kg

Explanation:

The given parameters are;

The side length of the cube box, s = 3(0) cm = 0.3 m

The thickness of the cube box, d = 5.0 cm = 0.05 m  

The mass of ice in the box, m = 4.0 kg

The outside temperature of the cube box, T₁ = 45°C

The temperature of the melting ice inside the box, T₂ = 0°C

The latent heat of fusion of ice, \(L_f\) = 3.35 × 10⁵ J/K/hr/kg

The surface area of the box, A = 6·s² 6 × (0.3 m)² = 0.54 m²

The coefficient of thermal conductivity, K = 0.01 J/s·m⁻¹·K⁻¹

For thermal equilibrium, we have;

The heat supplied by the surrounding = The heat gained by the ice

The  heat supplied by the surrounding, Q = K·A·ΔT·t/d

Where;

ΔT = T₁ - T₂ =  45° C - 0° C = 45° C

ΔT = 45° C

Q = K·A·ΔT·t/d = 0.01 × 0.54 × 45 × 6× 60×60/0.05 = 104976

∴ The  heat supplied by the surrounding, Q = 104976 J

The heat gained by the ice = \(L_f\) × \(m_{melted \ ice}\) =3.35 × 10⁵ J/kg × \(m_{melted \ ice}\)

Therefore, from Q =  \(L_f\) × \(m_{melted \ ice}\), we have;

Q = 104976 J =  \(L_f\) × \(m_{melted \ ice}\) = 3.35 × 10⁵ J/kg × \(m_{melted \ ice}\)

104976 J = 3.35 × 10⁵ J/kg × \(m_{melted \ ice}\)

\(m_{melted \ ice}\) = 104976 J/(3.35 × 10⁵ J/kg) ≈ 0.31336 kg

The mass of melted ice, \(m_{melted \ ice}\) ≈ 0.31336 kg

∴ The amount of solid ice remaining after 6 hours, \(m_{ice}\) = m - \(m_{melted \ ice}\)

Which gives;

\(m_{ice}\) = m - \(m_{melted \ ice}\) = 4.0 kg - 0.31336 kg ≈ 3.68664 kg

The amount of solid ice remaining after 6 hours, \(m_{ice}\) ≈ 3.68664 kg.

Answer:

There are seven base SI units corresponding to different parameters and are considered independent of each other. Derived units are derived from these 7 base units. Derived units are dependent on the base units and are not independent of each other. For example, let us derive the SI units for force. By Newtons Second Law of Motion, the force is same as the product of mass and acceleration of a body. that is, force = mass x acceleration. Also, acceleration is defined as the rate of change of velocity. And velocity is defined as the rate of change of displacement. Thus, force = mass x acceleration = mass x dv/dt = mass x dt2 Mass has SI units of kg, distance is measured in m and t has the SI unit of second. Thus, Sl unit of force is kg.m/s^2 (also known as Newton).

Answer:

D)  decreses the force  .... so the guy can land safely  :)

Explanation:

Answer:

It is 52° below the celestial equator.

Explanation:

The declination is the angle in degrees measured north (+) or south (-) of the an imaginary line called the celestial equator.

The celestial equator is a projection of the earth's equator on the celestial sphere. imaginary

The star named Canopus has a declination of approximately –52°.

Since the angle is negative, this shows that it is south or below the celestial equator and at 52° south of the celestial equator.

Thus, the star named Caponus is 52° below the celestial equator.

Answer:

the answer is 'it is 52° below the celestial equator.' :))

Explanation:

its the correct answer on the quizz,,, good luck!! :3

To find the number of turns in the coil, we need to know the value of the magnetic field strength. Without that information, we cannot give a numerical answer.

To solve this problem, we need to use Faraday's Law, which states that the induced EMF in a coil is proportional to the rate of change of magnetic flux through the coil. The magnetic flux is given by the product of the magnetic field strength and the area of the coil perpendicular to the direction of the field. Let's begin by finding the initial magnetic flux through the coil when its area is 0.6 m^2. We know that the induced EMF is 9 V, so we can write:

EMF = -N(dΦ/dt)

where N is the number of turns in the coil, Φ is the magnetic flux, and dΦ/dt is the rate of change of magnetic flux. We also know that the initial area of the coil is 0.6 m^2, so the initial magnetic flux is:

Φ_0 = BA_0 = B0.6

where B is the magnetic field strength.

Now, the area of the coil is halved to 0.3 m^2 in 2 minutes. This means that the area is changing at a rate of:

dA/dt = (0.3 - 0.6)/(2*60) = -0.005 m^2/s

The negative sign indicates that the area is decreasing.

Using Faraday's Law and the above information, we can solve for N:

N = -EMF/(dΦ/dt) = -9/[(d/dt)(BA)] = -9/[B(dA/dt)]

Plugging in the values, we get:

N = -9/[B*(-0.005)] = 1800/B

So, to find the number of turns in the coil, we need to know the value of the magnetic field strength. Without that information, we cannot give a numerical answer.

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After applying the kinematic relation, the bullet’s flight time would be 0.0726 s

The kinematic equations are a set of four equations that can be used to make predictions about information regarding an item's motion that is unknown, provided that other information regarding the motion of the object is known. The equations can be applied to any motion that can be characterized as either having a constant velocity (an acceleration of 0 m/s/s) or a constant acceleration (an acceleration of 0 m/s/s), and they can be used to analyze both types of motion. They are never permitted to be used during any time frame in which the acceleration is undergoing a change.

In this case we will be using the third kinematic relation:

d = vt + ½ gt²

in this case, we are given that:

d = (2.58 cm × ( 1 m ÷ 100 cm))

v = 0 m/s

g = 9.8 m/s

Thus, the bullet’s flight time would be:

(2.58 cm × ( 1 m ÷ 100 cm)) = (0 m/s) × t + ½ (9.8 m/s) × t²

½ (9.8 m/s) × t² = (2.58 cm × ( 1 m ÷ 100 cm))

T = √0.005265

T = 0.0726 s

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This statement is FALSE, the visible surface of the sun is composed of solid matter.

The sun is made totally out of plasma, the fourth nation of depending after gasoline, liquid, and strong, and the most energetic. As you could consider, the sun is tremendously hot. It varies among nine,900-27,000,000°F in temperature among the “surface” (the outer limb of its environment where it becomes obvious to light as opposed to opaque), and the middle.  

Unlike the gasoline massive planets, which probably have a strong middle, the sun is made nearly out of hydrogen and helium, the lightest of all the elements, and at no point, internal should either of those exist as a solid at the one’s temperatures, despite the awesome pressures that exist in the solar. It’s plasma all the way down, even at the center where the density is ten instances that of gold.

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The angular speed of the wheel is 8.00 rad/s. The tangential speed of point P is 16.00 m/s. The total acceleration of point P is 8.00 m/s^2. The angular position of point P is 73.38 rad.

The pace at which an object's position changes as perceived from a particular point of view and as measured by a particular unit of time (for example, 60 km/h northbound) is defined as its velocity.

(a) The angular speed of the wheel at t = 2.00 s can be found using the equation for angular acceleration:

ω = ω0 + αt

where ω is the final angular speed, ω0 is the initial angular speed (which is zero, since the wheel starts at rest), α is the angular acceleration, and t is the time.

ω = 0 + (4.00 rad/s^2)(2.00 s) = 8.00 rad/s

(b) To find the tangential speed of point P, we can use the equation:

v = rω

where v is the tangential speed, r is the radius of the wheel (2.00 m), and ω is the angular speed (8.00 rad/s).

v = (2.00 m)(8.00 rad/s) = 16.00 m/s

(c) The total acceleration of point P can be found by summing the radial and tangential components of acceleration. The radial acceleration is given by:

ar = αr = (4.00 rad/s^2)(2.00 m) = 8.00 m/s^2

The tangential acceleration is given by:

at = αr = (4.00 rad/s^2)(2.00 m) = 8.00 m/s^2

The total acceleration is the vector sum of the radial and tangential accelerations:

atotal = √(ar^2 + at^2) = √(8.00 m/s^2 + 8.00 m/s^2) = √(64 m^2/s^4) = 8.00 m/s^2

(d) The angular position of point P can be found using the equation:

θ = θ0 + ω0t + 1/2αt^2

where θ is the final angular position, θ0 is the initial angular position (57.38 degrees), ω0 is the initial angular speed (0 rad/s), α is the angular acceleration (4.00 rad/s^2), and t is the time (2.00 s).

θ = 57.38 + (0)(2.00 s) + (1/2)(4.00 rad/s^2)(2.00 s)^2 = 57.38 + 16 rad = 73.38 rad

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Answer:

1=f 2=t 3=f 4=t

Explanation:

Answer:

9.8

Explanation:

distance=vt

1.40*7=distance

Speed:-

\(\\ \tt\hookrightarrow \dfrac{Distance}{Time}\)

\(\\ \tt\hookrightarrow \dfrac{15}{1}=15km/h\)

Velocity:-

\(\\ \tt\hookrightarrow Displacement/Time \)

\(\\ \tt\hookrightarrow 0/1=0km/h\)

Answer:Hetero

Explanation: Honestly, same as the last guy said