Block 1, with mass m1 and speed 5.4 m/s, slides along an x axis on a frictionless floor and then undergoes a one-dimensional elastic collision with stationary block 2, with mass m2 = 0.63m1. The two blocks then slide into a region where the coefficient of kinetic friction is 0.53; there they stop. How far into that region do (a) block 1 and (b) block 2 slide? (a) Number Units (b) Number Units

Answer:

he will not be drowned

Explanation:

Question says , the height of the student = 4 feet,

Depth of the pool( in feet ) be x ( say ) which is less than  4 feet,

Clearly, the depth of the pool < height of the student,

This means, if the student goes for swimming in the pool, however he does not know swimming, he will not be drowned until he is suffering from an injury or external force.

The lungs of a scuba diver should expand to a volume of 12 L, the volume of air in her lungs will grow with an increase in surface air temperature, and the rms speed of the air velocity in her lungs won't change.

It is stated that water has a density of 1000 kg/m3. The diver's 6L lung capacity allows her to descend 10m under the sea. We may suppose that the water's temperature is constant.

A. The pressure P₁ at the surface of water is 100000 Pa.

So, the pressure at the depth of 10m in water will be given by,

P₂ = 1000x10x10 + P₁

P₂ = 100000 + P₁

P₂ = 200000 Pa

Now, we can write,

P₁V₁ = P₂V₂

Putting values,

6 x 200000 = V₂ x 100000

V₂ = 12L.

Her lungs should thus enlarge to 12L.

B. Because of the continuous pressure at the surface, the air warming will further increase the amount of air in the lungs.

C. The Vrms are provided by,

Vrms = √(3RT/M)

The Vrms won't change if the temperature stays constant since the air's mass will remain constant.

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Answer:

Its not getting as hot because water and soap can act as a lubricant and it would not heat up easily because of the soapy water.

Answer:

there is less friction when your hands are soapy

Explanation:

SMM2 refers to the Standard Method of Measurement 2. It is a document that specifies the method and processes used in measuring buildings and civil engineering works. SMM2 is commonly used in the construction industry.

The following are explanations of the clauses under Standard Method of Measurement 2 (SMM2):

i. D.10: This clause under SMM2 relates to the painting of metal and timber surfaces. It stipulates that when painting the surfaces of timber or metal, the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.

ii. D.12.4: This clause under SMM2 refers to the construction of walls using concrete blocks. It states that the concrete blocks used should have a minimum density of 1500 kg/m3. It also outlines specific measurements for the thickness of the mortar to be used for bonding the blocks together. The clause further specifies the measurement of the joint thickness between blocks.

iii. D.12.6: This clause under SMM2 refers to the rendering of walls with a cement mortar mix. It specifies that before rendering, the surface of the wall must be clean, dry, and free of debris. It also outlines specific measurements for the thickness of the rendering to be applied to the wall. The clause then stipulates that the rendering should be finished with a smooth surface that conforms to the architect's specifications.

iv. D.12.8: This clause under SMM2 refers to the painting of interior plastered walls. It stipulates that the preparation of surfaces and application of paint must conform to manufacturer specifications. It also specifies that the paint must be applied using a brush, roller, or spray. The clause then goes on to outline specific measurements for the thickness of paint coating to be applied on surfaces.

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The merry-go-round is accelerating since it is moving in a circle despite the fact that it is moving at a constant speed. The fact that an object moves in a circle does not always imply that it is moving at a constant speed. When an object moves in a circle, it changes direction, and this alteration of direction implies that the object is accelerating.

Even if the speed remains constant, it is still accelerating because the velocity is changing. This is referred to as centripetal acceleration. Centripetal acceleration is the acceleration caused by a force that pulls an object towards the center of the circle. Centripetal force is required for a body to move in a circle. A merry-go-round moves in a circle at a constant speed. This implies that the speed of the merry-go-round does not vary. However, the direction of motion changes continuously, indicating that the merry-go-round is constantly accelerating. Therefore, the merry-go-round is accelerating despite the fact that it is moving at a constant speed.

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The most scientific guess (hypothesis) based on what is known about the behavior of galaxies is that Galaxies are continuously moving away from each other. This hypothesis can be tested using Hubble's Law.

Hubble's law indicates that almost all galaxies are moving apart from one another because the universe as a whole is expanding. Choose any two galaxies at arbitrarily, and they're most likely traveling apart from each other.

Hubble discovered that galaxies move away from us at a rate proportionate to their distance: more distant galaxies move away faster than closer ones. The accompanying graphic shows Hubble's classic graph of measured velocity vs. distance for neighboring galaxies.

The graph shows a linear relationship between galaxy velocity (v) and distance (d).

The equation for the above linear relationship is:

                                          v = H₀ x d

Where:

H₀ is the expansion rate

v = velocity of the galaxy; and

d = distance.

Using the above formula, the astronomer can measure or test to know whether indeed the new galaxy is moving relative to the Milky Way galaxy and at what rate.

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If we know the frequency or wavelength of a wave, we can use this equation to calculate its speed or vice versa.

The correct relationship between the frequency of the incident radiation (ν), its wavelength (λ), and speed (c) is:

A. ν = λ/c

This equation is known as the wave equation and describes the relationship between the frequency, wavelength, and speed of a wave. It states that the frequency of a wave is inversely proportional to its wavelength and directly proportional to its speed. The speed of light (c) is a constant in a vacuum and its value is approximately 3.0 x 10^8 m/s.

Therefore, if we know the frequency or wavelength of a wave, we can use this equation to calculate its speed or vice versa.

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Answer:

3.94

Explanation:

divide total mass by the number of blocks since they are identical

Answer:

3.94

Explanation:

You want to find the mass of one block. Since we know there is 8 blocks with the same mass, you can divide the total mass by 8 since the mass is equally distributed within the 8 blocks

Our understanding of exoplanet formation is crucial for advancing our knowledge of planetary science, the origins of our own Solar System, the diversity of planetary systems, and the search for life beyond Earth.

1. Origins of the Solar System: Exoplanets provide valuable data and evidence that can help refine our understanding of how planets, including Earth, formed.

2. Planetary Diversity: The factors that contribute to the diversity and gain insights into the conditions necessary for the formation of habitable planets.

3. Habitability and Life: Understanding the conditions and processes that lead to the formation of habitable exoplanets.

4. Planetary Systems and Dynamics: dynamics and stability of planetary systems, including the interactions between planets and their host stars.

5. Evolution of Planetary Systems: Exoplanet formation provides information on the timescales and processes involved in the evolution of planetary systems

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Answer:

ehehehshehehehhehesh

Explanation:

ehehehehheheheeheh

Gravity, friction, and drag force are the forces that are acted on a car.

Gravity is defined as a force by which one body attracts other objects toward its center. Friction is the force that resists the relative motion of solid surfaces, fluid, and material that are sliding against each other. There are several types of friction force i.e. Dry friction is a type of force that opposes the relative motion of two solid surfaces that are in contact with each other.

Drag is a mechanical force that is generated by the interaction and physical contact of a solid body with a liquid or gas. It is not produced by a field force, gravitational field, or an electromagnetic field, in which one object can affect another object without any physical contact with each other.

So we can conclude that the forces acting on the car are gravity, friction and drag force.

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If any wave makes 44 cycles in 10 seconds, then it has a frequency of 4.4 Hz.

The frequency of a wave is the number of cycles it completes in one second. It is measured in Hertz (Hz). To calculate the frequency of a wave, you can use the formula:
Frequency = Number of cycles / Time in seconds

In this case, the number of cycles is 44 and the time is 10 seconds. So, the frequency of the wave is:
Frequency = 44 cycles / 10 seconds

Frequency = 4.4 cycles/second

Frequency = 4.4 Hz

Therefore, the frequency of the wave is 4.4 Hz.

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Answer: I would stop been shy, so I could be able to say what I think to others.  I would be nicer to others, behave better. I would share more with others.

ANSWER

EXPLANATION

Parameters given:

Initial velocity, v0 = 78.4

Angle of projectile, θ = 52 degrees

(a) To find the flight time of the tennis ball, apply the formula:

where g = acceleration due to gravity

Hence, the total flight time of the tennis ball is:

(b) To find the maximum altitude of the ball during its flight, apply the formula:

Therefore, the maximum height attained by the tennis ball is:

(c) To find the horizontal distance the tennis ball travels, apply the formula:

Hence, the horizontal distance traveled by the tennis ball is:

(d) To find the final velocity of the tennis ball, apply the formula:

where h = initial height = 0 m

Hence, the final velocity of the tennis ball just before impact is:

Answer:

200j

Work Done=Wieght×Speed

10×20

Invariance principles and conservation laws are connected by Noether's theorem. Invariance is the quality of something that remains the same regardless of change. In mathematical physics, this refers to a scenario where physical laws or properties remain unchanged under some specified transformation.

The Lagrangian is a mathematical model used to derive the equations of motion of a system of particles or fields. The theory of rotational invariance states that the Lagrangian is unchanged under rotations about a particular symmetry axis.Suppose that the Lagrangian of an N-particle system is unchanged by rotations about a certain symmetry axis.

Without loss of generality, let this axis be the z-axis. We need to show that the Lagrangian is unchanged when all the particles (labelled by a) are moved simultaneously from (ra,θα,Pa) to (Ta,θα,φα+e).For a single particle, the Lagrangian L does not change under rotation, as long as the motion is confined to a plane.

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The speed of the raft immediately after the diver jumps is 0.6 m/s.

After the swimmer jumps, the momentum of the system is still conserved, but it is no longer zero, since the swimmer is now moving. We can use the equation:

(m1v1 + m2v2)before = (m1v1 + m2v2)after

We want to solve for v2, velocity of the raft immediately after the jump.

Before jump, velocity of  raft is zero, so we can simplify  equation to:

m1v1 = m2v2

Substituting in  values we know, we get:

60 kg * 1.5 m/s = 150 kg * v2

Simplifying, we get:

v2 = (60 kg * 1.5 m/s) / 150 kg = 0.6 m/s

So the speed of the raft immediately after the diver jumps is 0.6 m/s.

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The answer would have to be 8.47 m/s/s because the backwards pull + the rate of speed it is going would have to be added to get the answer to compensate for the backwards pull

An electrically charged object can be used to attract any object with an opposite charge.

This is due to the fundamental principle that opposites attract and repel in physics.

Electric charge is a fundamental property of matter that gives rise to electromagnetic interactions. An electric charge, whether positive or negative, produces an electric field that surrounds it. This field exerts a force on any other charge in its vicinity that is either attracted to or repelled from it. Electric charge is a fundamental property of matter that produces a variety of electric phenomena. When the charge is concentrated in a localized region of space, the object is electrically charged. When there is a net accumulation of charge in an object, it becomes electrically charged. An electrically charged object produces an electric field in its vicinity, which exerts a force on other charged objects. An electrically charged object can be used to attract objects with an opposite charge or repel objects with the same charge.

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When two surfaces glide past one another, a force known as friction is created.Friction forces that oppose the motion of moving objects cause them to expend energy and slow down.

An object rolls on a surface, creating rolling friction. When two surfaces rub against one another, sliding friction occurs. The deformation of surfaces causes rolling friction. Because tiny surfaces connect, sliding friction occurs.

Therefore, When the child pushes themselves down the slides. As the child is in motion as they are sliding down.

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Answer:When the child pushes themselves down the slides.

Explanation: i think im not sure

Answer:

i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii)  Find the value of k first: F = 400 + k(15^2)                                              k = 28/9    F = 400 +(28/9)(30^2) = 320

Explanation:

Answer:

a = 10/s^2

Explanation:

Answer:

a=10 m/s *2 right

Explanation:

The net force (0.5 kg) divided by the mass (5 N) = 10

The force moved the object to the right.

So you Would put this in the equation a=___ m/s *2 _____

And you would get a=10m/s*2 right

HOPE YOU LEARNED SOMETHING SO WHEN WE GO BACK TO SCHOOL YOU WILL KNOW WHAT YOU ARE TALKING ABOUT ! : )

In the circuit:(given in the attachment)

The loading effect occurs because the impedance of the DAQ board's analog input (144 kΩ) is in parallel with the NTC thermistor. This parallel combination affects the resistance and, consequently, the voltage divider formed by the NTC thermistor and the input impedance of the DAQ board.

To calculate the equivalent resistance of the parallel combination, we can use the formula:

1 / R equivalent = 1 / Rthermistor + 1 / Rinput

R equivalent = (Rthermistor * Rinput) / (Rthermistor + Rinput)

Substituting the values:

Requivalent = (10kΩ * 144kΩ) / (10kΩ + 144kΩ)

= 1.333kΩ

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The correct question is given below-

You have been asked to measure the temperature of a motor using a Negative Temperature Coefficient (NTC) thermistor with a nominal resistance of 10kΩ at 25 oC room temperature. You have access to an NI 6008 DAQ board with an analog input impedance of 144 kΩ. Please draw the circuit diagram that you will use to conduct this measurement below and calculate the equivalent resistance.

Answer

hdhcu very much xbeyxbuxbduxb shx

The work done on the closed system consisting of 2 kg of water initially at 160°C and 10 bar, undergoing an internally reversible, isothermal expansion with energy transfer by heat into the system of 2700 kJ, is positive and can be calculated as follows:

The given problem involves an isothermal process, which means the temperature of the system remains constant throughout the process. According to the first law of thermodynamics, for an isothermal process, the work done is equal to the heat transferred into the system.

Given:

Mass of water (m) = 2 kg

Initial temperature (T) = 160°C = (160 + 273.15) K = 433.15 K (converting to Kelvin)

Initial pressure (P) = 10 bar = 10 × 10⁵ Pa (converting to Pascal)

Heat transferred (Q) = 2700 kJ = 2700 × 10³ J (converting to Joules)

Since the process is isothermal, the work done (W) is equal to the heat transferred (Q) into the system, i.e., W = Q.

Substituting the given values, we get:

W = 2700 × 10³ J = 2700 kJ

So, the work done on the system is 2700 kJ, and it is positive as the heat is transferred into the system during the expansion process.

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Potential difference (in V) across the R₂ resistor is option E) 10

In the circuit given below, the capacitors are uncharged. The switch is then closed for a long time. R₁ = 6Ω, R₂ = 40 Ω, R3 = 40 Ω and V = 20V.

Find the potential difference across the R₂ resistor.Circuit Diagram:We can solve this question by following the below steps:

Step 1: Finding the Total Resistance

Let us assume the capacitors to be open circuit initially and solve the resistors R₁, R₂, and R₃ in series,

Rₛ.Rₛ= R₁ + R₂ + R₃= 6 + 40 + 40= 86Ω

Step 2: Calculating the Current

We can calculate the current flowing in the circuit by using Ohm's law, which is given as:

I = V/Rₛ = 20/86= 0.23A

Step 3: Finding the Potential Difference across R₂The potential difference across R₂ is given as:

V₂= IR₂= 0.23 × 40= 9.2V

Therefore, the potential difference (in V) across the R₂ resistor is 9.2V.

The option that matches the value is E. 10.

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Answer:

1. b

2. e

3. a

4. c

5. d

hope dis helps ^-^

Answer:

17.84 m/s.

Explanation:

From the question given above, the following data were obtained:

Angle of projection (θ) = 25°

Maximum height (H) reached = 2.9 m

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

Initial velocity (u) =..?

Thus, we can obtain the initial velocity of the lure as follow:

H = u² sine² θ /2g

2.9 = u² × (sine 25)² / 2×9.8

2.9 = u² × (0.4226)²/19.6

Cross multiply

u² × (0.4226)² = 2.9 × 19.6

u² × (0.4226)² = 56.84

Divide both side by (0.4226)²

u² = 56.84/(0.4226)²

u² = 318.27

Take the square root of both side

u = √318.27

u = 17.84 m/s.

Therefore, the initial velocity of the lure is 17.84 m/s.

No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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The incline is oriented at an angle of approximately 10.8° above the horizontal.

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