one end of a cylindrical pipe has a radius of 3.0 cm. water streams steadily out at 6.8 m/s. what is the rate at which mass is leaving the pipe? answer in kg/s.

The possible tension or weight of force F1 is determined as 135 N.

option A.

The maximum value of force that can be supported by force F1 is calculated by applying Newton's second law of motion as follows;

F = mg

where;

m is the mass

g is acceleration due to gravity

The maximum value of mass being supported = 8 kg + 15 kg = 23 kg

The corresponding weight of these masses is calculated as;

W = mg

W = 23 kg x 9.8 m/s²

W = 225. 4 N

The weight = ¹/₄ x 225.4 N = 56.35 N

The only option within these range = 135 N

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Answer:

Its b

Explanation:

I just did this question

The question that can be answered by scientific investigation is that can be answered by gathering  data during an experiment. Thus option B is correct.

Investigation on a natural phenomenon or process to solve a scientific question or to solve a social or environmental issue by well designed experiments based on reasonable observations is called scientific investigation.

A scientific investigation includes, variables, hypothesis , observations, research  methodology. Scientific experiments have to well designed to address all the outcomes of the observations and  must be feasible to prove whether the hypothesis is true or not.

Scientific investigations cannot be conducted based on only opinions from scientists or scientific record. The data have to be collected through experiments conducted by well designed research methodology.

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Answer:

One example of a fixed pulley is a Flag Pole

Explanation:

A good example of a fixed pulley is a flag pole: When you pull down on the rope, the direction of force is redirected by the pulley, and you raise the flag. Other examples of movable pulleys include construction cranes, modern elevators, and some types of weight lifting machines at the gym.

Answer:

D all of these

Explanation:

Extrinsic statements originate in parents ,society and teachers. Option D is correct.

Extrinsic motivation is defined as conduct motivated by external incentives. Extrinsically driven people will continue to do something even if it isn't pleasurable or rewarding in and of itself.

These incentives might be monetary or intangible in nature, such as acclaim or renown. Extrinsic motivation is distinct from intrinsic motivation in that it is only motivated by external incentives.

Extrinsic statements originate in;

a. Parents

b. Society

c. Teachers.

Extrinsic statements originate in all of the above given option.

Hence, option D is correct.

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Answer:

"the maximum extent of a vibration or oscillation, measured from the position of equilibrium."

hope this helps

Answer:

amplitude and physics the maximum displacement or distance moved by point on a vibrating body or wave measured from its equilibrium position it is equal to 1/2 of the length of the vibration path

Answer:

b) 4781 N

Explanation:

Because there is a redius do this question is talking about the acceleration force which= mv^2/r

so a=15^2/80=2.8125 m^2/s

so the force will be = m.a

F =1700×2.8125=4781.25 N

The equation V = √(3kT/m) relates the root-mean-square velocity of gas particles to their mass and temperature.

The given formula V = √(3kT/m) is related to the root-mean-square speed (Vrms) of gas particles.

Here's the explanation of the terms:
V: The root-mean-square speed (Vrms) of gas particles
â: Square root symbol (â = √)
3: A constant value in the formula
k: Boltzmann's constant (\(1.38 * 10^-23 J/K\))
T: Temperature of the gas in Kelvin
m: Mass of a single gas particle.
To find the root-mean-square speed (Vrms) of gas particles, follow these steps:
Identify the values of temperature (T), Boltzmann's constant (k), and mass of a single gas particle (m).
Multiply the temperature (T) by Boltzmann's constant (k) and the constant value 3.
Divide the result from step 2 by the mass of a single gas particle (m).

Take the square root of the result from step 3.
That will give you the root-mean-square speed (Vrms) of the gas particles.

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Answer:

-89.22 C and 183.94 K

Explanation:

TC= (-128.6 - 32) / 1.8 = -89.222222 C

TK= -89.22 + 273.16 = 183.94

The conversion of −128.6°F temperature in degree centigrade -89.22 is

and to kelvin is 183.94 k

Fahrenheit temperature scale is a scale based on 32 for the freezing point of water and 212 for the boiling point of water, the interval between the two being divided into 180 parts.

The 18th-century German physicist Daniel Gabriel Fahrenheit originally took as the zero of his scale the temperature of an equal ice-salt mixture

and selected the values of 30 and 90 for the freezing point of water and normal body temperature, respectively; these later were revised to 32 and 96, but the final scale required an adjustment to 98.6 for the latter value.

To convert from fahrenhiet to degree celcius

\(T_C= \dfrac{(-128.6 - 32) }{ 1.8} = -89.222222 \ ^oC\)

To convert from kelvin to degree

\(T_K= -89.22 + 273.16 = 183.94\ k\)

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Answer:

Distancia = 50.04 metros

Explanation:

Dados los siguientes datos;

Velocidad = 10 km/h

Tiempo = 18 segundos

Para encontrar la distancia;

Conversión:

10 km/h = 10 * 1000/3600 = 2.78 m/s

Distancia = velocidad * tiempo

Distancia = 2.78 * 18

Distancia = 50.04 metros

Por lo tanto, el tren viajaría 50.04 metros antes de detenerse por completo.

Answer:

yes

Explanation:

yes

The resistance of the heater coil should be approximately 29.5 Ω. The power (P) dissipated by a resistor with resistance R and voltage V across it can be calculated using the formula P = V^2/R. Rearranging this formula, we can solve for R: R = V^2/P.

Substituting the given values, we get R = (125 V)^2 / 530 W = 29.5 Ω (rounded to one decimal place).

Therefore, the resistance of the heater coil should be approximately 29.5 Ω to provide 530 W of heat with a voltage of 125 V.

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A 1.0 kg ball hits the floor with a velocity of 2.0 m/s and bounces back up with a velocity of 1.5 m/s, the ball's change in momentum is -3.5 kg m/s.

The ball's change in momentum can be calculated using the formula:
change in momentum = final momentum - initial momentum
The initial momentum of the ball can be found using the formula:
initial momentum = mass x velocity
So, the initial momentum of the ball is:
initial momentum = 1.0 kg x 2.0 m/s = 2.0 kg m/s
The final momentum of the ball can also be found using the same formula:
final momentum = mass x velocity
So, the final momentum of the ball is:
final momentum = 1.0 kg x (-1.5 m/s) = -1.5 kg m/s
(Note that the negative sign indicates that the ball is moving in the opposite direction after bouncing back up.)
Therefore, the ball's change in momentum is:
change in momentum = final momentum - initial momentum
change in momentum = (-1.5 kg m/s) - (2.0 kg m/s)
change in momentum = -3.5 kg m/s
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cut the square and make it a triangle

Velocity is a physical quantity that describes the rate at which an object changes its position with respect to time. It is a vector quantity, which means that it has both a magnitude and a direction.

From the given information, we know that the motorboat's initial velocity is 40 ft/s and its final velocity after the motor quits is 20 ft/s. We also know that the boat experiences resistance that is proportional to its velocity. This can be modeled using the differential equation:

dv/dt = -kv

where v is the velocity of the boat and k is the constant of proportionality. To solve for k, we can use the initial and final velocities of the boat:

When t = 0, v = 40 ft/s

When t = 10 s, v = 20 ft/s

Integrating the differential equation, we get:

∫ dv/v = ∫ -k dt

ln|v| = -kt + C

where C is the constant of integration.

Applying the initial condition v(0) = 40, we get:

ln|40| = C

C = ln|40|

Substituting this value into the equation, we get:

ln|v| = -kt + ln|40|

ln|v| = ln|40| - kt

Taking the exponential of both sides, we get:

|v| = e^(ln|40| - kt)

|v| = 40e^(-kt)

Applying the final condition v(10) = 20, we get:

|20| = 40e^(-k*10)

1/2 = e^(-10k)

Taking the natural logarithm of both sides, we get:

ln(1/2) = -10k

k = -ln(1/2)/10

k ≈ 0.0693

Therefore, the constant of proportionality is k ≈ 0.0693. The velocity of the motorboat at time t is given by:

v(t) = 40e^(-0.0693t)

where v is in ft/s and t is in seconds.

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The amount of heat the cup absorb is 1003200 J.

Given,

Mass of coffee cup = 4.00 × 100 g or 4 kg

Room temperature = 20°C

Hot water temperature = 80°C

We have to find the amount of heat the cup absorbed.

Now, by using the specific heat formula, we have

Q = mCΔT

Where m is the mass of the substance, c is the specific heat, ΔT is the change in temperature, and Q is the amount of heat received or lost.

Putting the values, we get

Q = 4 × 4180 × (80°- 20°)

Q = 1003200 J/kg K

Hence, the amount of heat absorbed by the cup is 1003200 J/kg K.

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Answer:

In the medium where the angle of incedence is 10°

Explanation:

This is because angle of incedence is directly proportional to refractive index of a medium.

Since refractive index is inversely proprtional to speed of light in medium, it will be the case.

If, the battery terminals are momentarily shorted together, the current flowing through the circuit is 120 A.

If the terminals of the battery are momentarily shorted together, the internal resistance becomes part of the circuit, and the current flowing through the circuit can be calculated using Ohm's Law.

Given;

Battery voltage (V) = 12.00 V

Internal resistance (R_internal) = 0.1 Ω

Ohm's Law states that the current (I) flowing through a circuit is equal to the voltage (V) divided by the total resistance (R), which in this case is the sum of the internal resistance and any external resistance (assuming it is negligible);

I = V / (R_internal + R_external)

When the battery terminals are shorted, the external resistance is effectively zero, so the equation becomes;

I = V / R_internal

Plugging in the values, we have;

I = 12.00 V / 0.1 Ω

Simplifying, we get;

I = 120 A

Therefore, if the battery terminals are momentarily shorted together, the current flowing through the circuit is 120 A.

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The heat energy in kj that is produced is 7.21kj  given that the temperature change observed is 11.5 c when 4.436 g of naoh are added to 150.0 ml of water

It is given that 4.436g is the mass of NaOH. The density and volume of water it has been added to was also given.

We need to convert the water's volume to mass

Density = mass / volume

Thus, mass = density * volume

150.0mL H2O * (1.000 g/mL) = 150.0 g H2O.

Now simply add the two masses: 150g + 4.436g = 154.436g

Q = mcdT

Q = heat added or removed

m = mass of substance = 154.436g

c = specific heat of this solution is 4.06j/g C

dT = change in temperature

Q = 154.436g * 4.06 * 11.5

Q =7,210.62J

Q = 7.21kj

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Answer:

1 -a push or a pull acting on a object.

Explanation:

force is a push or pull acting upon an object as a result of its interaction with another object.

It takes the ball 3.06 seconds to reach its highest point

The time it takes for a ball to reach its highest point is given by the equation:

t = v / g

where

In this case, the initial velocity is 30.0 m/s and the acceleration due to gravity is \(9.8 m/s^2\). Therefore, the time it takes for the ball to reach its highest point is:

\(t = 30.0 m/s / 9.8 m/s^2 = 3.06 s\)

Therefore, it takes the ball 3.06 seconds to reach its highest point.

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The answers are:

Kinetic energy is a form of energy associated with the motion of an object. It is the energy an object possesses due to its velocity or speed. The kinetic energy of an object depends on both its mass and its velocity. The equation to calculate kinetic energy is:

Kinetic Energy = (1/2) * mass * velocity^2

In simpler terms, kinetic energy represents the energy that an object possesses by virtue of its motion.

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Answer:

B

Explanation:

You need a specific force to change the momentum of something.

Hope this helps!

The statement is false. The expansion of the universe has not been constant since its formation.

The cosmos has been expanding faster over time, according to the prevalent scientific theory. Observations of far-off supernovae and measurements of cosmic microwave background radiation were used to make this finding.

It sparked the development of the cosmic inflation theory and the idea of dark energy, which is believed to be the cause of the rapid expansion. Throughout the universe's history, the pace of expansion has changed, with periods of slower growth and periods of quicker expansion.

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The scientist responsible for the modern periodic table that we study today is Dmitri Mendeleev. Mendeleev was a Russian chemist who lived in the 19th century. He is often credited as the creator of the periodic table because of his significant contributions to its development.

In the mid-1860s, Mendeleev was working on organizing the known elements based on their chemical properties. He noticed that there was a recurring pattern in the properties of the elements when they were arranged in order of increasing atomic mass. Mendeleev proposed that these elements could be arranged in a table format, where elements with similar properties would fall into the same groups or columns.

Mendeleev's breakthrough came when he realized that there were some gaps or missing elements in his proposed table. Instead of discarding these gaps, he made a bold move and predicted the existence and properties of the yet-to-be-discovered elements. He left spaces for these elements, specifying their properties based on the patterns he observed.

What made Mendeleev's periodic table significant was that it not only organized the elements based on their atomic masses but also successfully predicted the properties of the missing elements. Over time, his predictions were proven correct when the missing elements were discovered and found to match Mendeleev's descriptions.

Mendeleev's periodic table formed the foundation for the modern periodic table that we use today. Although there have been some modifications and improvements to the table since Mendeleev's time, his work laid the groundwork for understanding the periodicity and organizing the elements based on their properties. His contributions to the field of chemistry and the development of the periodic table have had a lasting impact on our understanding of the elements and their relationships.

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Answer:

Its scatter plot graph.

Explanation:

I took the test and got it right soo your welcome.

The catch in this one is:  We don't know how much force the student used to push the bike.  

It wasn't necessarily the 100N.  That's just the weight of the bike. But you know that you can push a car, a wagon, or a bicycle hard, you can push it not so hard, you can give it a little push, you can give it a big push, you can push it strong, you can push it weak, you can push it medium.  The harder you push, the more it'll accelerate, but it's completely up to you how hard you want to push.  That's what's so great about wheels !  That's why they were such a great invention ! This is where I made my biggest mistake. This guy came into my store one day and said he's got this great invention, it's definitely going to take off, it'll be a winner for sure, he called it a "wheel".  I looked at it, I turned it over and I looked on all sides. I thought it was too simple.  I didn't know then it was elegant. I threw him out.  I was so dumb.  I could have invested money in that guy, today I would have probably more than a hundred dollars.

Anyway, can we figure out how much force the student used to push with ?  Stay tuned:

-- The bike covered 15 meters in 5 seconds.  Its average speed during the whole push was (15m/5s) = 3 meters/sec.

-- If the bike started out with no speed, and its average speed was 3 m/s, then it must have been moving at 6 m/s at the end of the push.

-- If its speed increased from zero to 6 m/s in 5 seconds, then its acceleration was (6m/s / 5 sec) = 1.2 m/s²

-- The bike's weight is 100N.  

(mass) x (gravity) = 100N

Bikemass = (100N) / (9.8 m/s²)

Bikemass = 10.2 kilograms

-- F = m A

Force = (mass) x (acceleration)

Force = (10.2 kg) x (1.2 m/s²)

Force = 12.24 N

-- Work = (force) x (distance)

Work = (12.24 N) x (15 m)

Work = 183.67 Joules

-- Power = (work done) / (time to do the work)

Power = (183.67 joules) / (5 seconds)

Power = 36.73 watts

Answer:

We have the position vector given in terms of time t. r(t) = t^3*i + t^2*j

To find the velocity vector we have to differentiate r(t) with respect to time.

r'(t) = 3t^2*i + 2t*j

The vector representing acceleration is the derivative of the position vector

r''(t) = 6t*i + 2*j

When time t = 2.

The velocity vector is 3*2^2*i + 2*2*j

=> 12*i + 4*j

The speed is the absolute value of the velocity vector or sqrt(12^2 + 4^2) = sqrt (144 + 16) = sqrt 160

The acceleration vector is 6*2*i + 2*j

=> 12*i + 2*j

The required acceleration at t=2 is 12*i + 2*j and the speed is sqrt 160.

Explanation:

Can I have thx and brainliest?

Explanation:

by finding the distance between two successful crest

Answer:

the wavelength can be measured as the distance from crest to crest  or from trough to trough , the wavelength of a wave can be measured as the distance from a point on a wave to the corresponding point on the next cycle of the wave.

Explanation: