Water flows through a pipe with a cross-sectional area of 0.002 m^2 at a mass flow rate of 4 kg/s. the density of water is 1 000 kg/m^3. Determine its average velocity
Water flows through a pipe with a cross-sectional area of 0.002 m^2 at a mass flow rate of 4 kg/s. The density of water is 1 000 kg/m^3 . The average velocity will be 2m/s
The flow rate of a liquid is how much fluid passes through an area in a particular time. Flow rate can be articulated in either in terms of velocity and cross-sectional area, or time and volume.
Flow rate = Volume of fluid / time
= (Area * distance) / time
= Area * average velocity (distance / time = average velocity)
Given
Cross-sectional area = 0.002 \(m^{2}\)
Flow rate = 4 kg/s
Average velocity = Flow rate / (Area * density)
= 4 / (0.002 * 1000)
= 2m/s
hence , the average velocity will be 2 m/s
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What is the electric field 1. 0cm away from a proton?
The electric field 1.0cm away from a proton is 9.0x10^5 N/C.
A proton has a positive charge of +1.6x10^-19 C. The electric field can be calculated using Coulomb's law, which states that the magnitude of the electric field created by a point charge is proportional to the magnitude of the charge and inversely proportional to the square of the distance from the charge.
Therefore, the electric field generated by a proton would be given by the equation E=kq/r^2, where k is the Coulomb constant (8.99x10^9 Nm^2/C^2), q is the charge of the proton (+1.6x10^-19 C), and r is the distance from the proton (1.0cm = 0.01m).
Plugging in the values yields E=(8.99x10^9)(1.6x10^-19)/(0.01^2)=9.0x10^5 N/C. This means that at a distance of 1.0cm away from a proton, the electric field will have a strength of 9.0x10^5 N/C.
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describe how astronomers use the cosmic background radiation to determine the geometry of the universe
Astronomers use the cosmic background radiation to determine the geometry of the universe through careful observations of the radiation's temperature fluctuations.
The cosmic background radiation is the leftover glow from the Big Bang that permeates throughout the universe. It is essentially a snapshot of the universe when it was just 380,000 years old. By studying the cosmic background radiation, astronomers can learn about the early universe and its properties.
One key property of the universe that the cosmic background radiation can reveal is its geometry. This is because the temperature fluctuations in the radiation are related to the size and shape of the universe. If the universe is flat, the temperature fluctuations will have a certain pattern. If the universe is curved, the pattern will be different. By analyzing these temperature fluctuations, astronomers can determine the geometry of the universe.
In summary, astronomers use the cosmic background radiation to determine the geometry of the universe by studying its temperature fluctuations, which reveal important information about the early universe and its properties.
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What is the reason for a stone sink in the water but a plastic floats?
Select one:
A.
The density of plastic is greater than stone
B.
Mass of the stone is greater than mass of plastics.
C.
The density of plastic is greater than water.
D.
The density of stone is greater than water.
Why is it colder in winter than summer? Give two reasons.
Answer:
Actually, the sun goes a bit down, like it's not all the way up as to summer. How I know is that you actually can go online maybe search for some videos and see proof, I don't really know how to explain it.
Explanation:
Reason #1: If you check, go out for 12 hours and see, I think the sun is a little down.
Reason #2:
The earth’s axis is tilted.
From a Brainly user of this question for more info:
The Earth is NOT farther away from the sun in USA Winter, and NOT closer to the sun in USA Summer. In 2021, we will be NEAREST to the sun on January 2, and FARTHEST from the sun on July 5 !
NEAREST to the sun next Saturday.
FARTHEST from the sun next July 5.
What does the Area under a Speed-time graph represent?
A. acceleration
B. average speed
C. deceleration
D. distance travelled
Answer:
d. distance travelled
Explanation:
answer
If light moves and 300, 000m / s in a vacuum what would be the wavelength of a light wave that has a frequency of 40,000Hz in outer space ?
\(\begin{gathered} given: \\ frequency\text{ }\vartheta=40,000\text{ Hz} \\ speed\text{ of light c=3*10}^8\text{ m/s} \end{gathered}\)\(\begin{gathered} to\text{ find:} \\ wavelength\text{ }\lambda=? \end{gathered}\)\(\begin{gathered} wavelength\text{ }\lambda=\frac{v}{\vartheta} \\ v=speed\text{ of the wave} \end{gathered}\)\(\begin{gathered} put\text{ the values in the above formula} \\ \lambda=\frac{3*10^8m/s^2}{40000Hz} \\ \lambda=0.75*10^4m \end{gathered}\)
so the value of wavelength λ=0.75*10^4 m
the attraction or repulsion between charged particles is known as
The attraction or repulsion between charged particles is known as electric force.
The attraction or repulsion of charged particles produces an electric force. Positive and negative charges are the two different types of charges.
Protons carry positive charges, whereas electrons produce negative charges. While a positive charge and a negative charge attract one another, two positive charges or two negative charges will repel one another.
The foundation of chemical bonding is this force of attraction. The linked electrons are drawn to the nucleus of an atom by this force of attraction, and as a result, two atoms come together to create compounds.
Thus, the blank space indicates the electric force.
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Quantum uncertainties are most predominant for simultaneously measuring the speed and location of
A) a baseball
B) a spitball.
C) an electron
D) none of the above
At very high pressures, gases become what and will eventually do what
what is the average velocity of a trolley that starts from rest and acquires a final velocity of 19 m/s?
What is the mass of a baseball that has a kinetic energy of 105 J and is traveling at 10 m/s?
Answer:
\(\boxed {\boxed {\sf 2.1 \ kilograms}}\)
Explanation:
Kinetic energy is the energy an object possesses due to motion. The formula 1/2 the product of mass and the squared velocity.
\(E_k=\frac{1}{2} mv^2\)
We know the baseball's kinetic energy is 105 Joules. It is also traveling at a velocity of 10 meters per second. `
First, convert the units of Joules to make unit cancellation easier later in the problem. 1 Joule (J) is equal to 1 kilogram square meter per square second (kg*m²/s²). The baseball's kinetic energy of 105 J is equal to 105 kg*m²/s².
Now we know 2 values:
\(E_k= 105 \ kg*m^2/s^2\)\(v= 10 \ m/s\)Substitute these values into the formula.
\(105 \ kg*m^2/s^2= \frac{1}{2} m (10 \ m/s)^2\)
Now we need to solve for m, the mass. Solve the exponent.
(10 m/s)²= 10 m/s * 10 m/s = 100 m²/s²\(105 \ kg *m^2/s^2 = \frac{1}{2} m (100 \ m^2/s^2)\)
Multiply on the right side.
\(105 \ kg *m^2/s^2 = m (\frac{1}{2} * 100 \ m^2/s^2)\)
\(105 \ kg *m^2/s^2 = m (50 \ m^2/s^2)\)
The variable, m, is being multiplied by 50 square meters per square second. The opposite of multiplication is division, so we divide both sides by that value.
\(\frac {105 \ kg *m^2/s^2 }{50 \ m^2/s^2}= \frac{ m (50 \ m^2/s^2)}{50 \ m^2/s^2}\)
\(\frac {105 \ kg *m^2/s^2 }{50 \ m^2/s^2}= m\)
The units of square meter per square second will cancel out.
\(\frac {105 }{50} \ kg= m\)
\(2.1 \ kg=m\)
The mass of the baseball is 2.1 kilograms.
A 45-kilogram bicyclist climbs a hill at a constant speed of 2. 5 meters per second by applying an average force of 85 newtons. Approximately how much power does the bicyclist develop?
A 45-kilogram bicyclist climbs a hill at a constant speed of 2. 5 meters per second by applying an average force of 85 newtons.
The bicyclist develops 212.5 Watts of power while climbing the hill at a constant speed of 2.5 meters per second.
Power is defined as the rate at which work is done or energy is transferred. The formula for power is:
Power = Work / Time
When an object is moving at a constant speed, the work done is equal to the force applied multiplied by the distance travelled. In this case, the work done by the bicyclist is equal to the force applied multiplied by the displacement (distance) travelled.
Given:
Mass of the bicyclist, m = 45 kg
Speed of the bicyclist, v = 2.5 m/s
Force applied by the bicyclist, F = 85 N
To determine the displacement, we can use the formula:
Displacement = Speed * Time
Since the speed is constant at 2.5 m/s, the displacement is equal to the product of the speed and the time.
Let's assume the time taken to climb the hill is T.
Displacement = 2.5 m/s * T
Now, let's calculate the work done by the bicyclist:
Work = Force * Displacement
Work = 85 N * (2.5 m/s * T)
The power developed by the bicyclist is given by the formula:
Power = Work / Time
Since the work is calculated as 85 N * (2.5 m/s * T) and the time is T, we can simplify the formula:
Power = 85 N * (2.5 m/s * T) / T
The T cancels out, leaving us with:
Power = 85 N * 2.5 m/s
Power = 212.5 Watts
Therefore, the bicyclist develops approximately 212.5 Watts of power while climbing the hill at a constant speed of 2.5 meters per second.
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about how many stars are in our galaxy (the milky way galaxy)?
The Milky Way galaxy is the home of the Sun. Over 100,000,000,000 stars are thought to be present in the Milky Way alone, according to astronomers.
One of the many billions of galaxies in the cosmos is the Milky Way galaxy. The universe is a large region of space that houses everything that has ever existed. All the galaxies, stars, and planets are in the cosmos. Unknown is the precise size of the universe. According to scientists, the universe is still growing. At least 100 billion stars, including our Sun, make up the Milky Way, a spiral galaxy with a diameter of around 100,000 light-years. We are located in one of the four primary arms of the pinwheel-shaped constellation of stars, roughly two thirds of the way from the center. It is believed that the majority of the stars in our galaxy are home to their own families of planets.
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Which processes occur during the second stage of technological design? Check all that apply.
designing a solution
studying relevant information
rebuilding and retesting
reporting a solution
defining criteria of success
identifying a problem
building a prototype
Answer:
designing a solution
Explanation:
after knowing & identifying a problem we start putting a solution
if we shake the branches of tree the fruits fall why
Answer:
Explanation:
when a tree is shaken it's fruits and leaves fall down due to the gravitational force exerted by earth.
All fruits and leaves do not fall when tree is shaken, mostly only those fruits and leaves are fallen that are ripped.
It's because their tissues has become weak
clarify this statement acceleration due to gravity of the Earth is 9.8m/s square
Answer:
it means that velocity of a body rises by 9.8m/s each second if the air resistance is nrelated
mark me
A rock is thrown horizontally from a height of 6.00 m. Which of the following is the time required for the rock to reach the ground ?
Answer:
t=10.95 seg
Explanation:
The vertical component of velocity is 0, so, the time in air can be calculated
\(h=v_ot-\frac{1}{2}gt^2\\\\h=0-\frac{1}{2}gt^2~=>t=\sqrt{2gh}=\sqrt{2*10\frac{m}{s^2}*6m}=10.9544~seg\)
NEED HELP WITH ALL OF THESE PLSSS dont just steal plsssssssss beg of you help me
A 12.6 kg box is being pushed to the right across the floor with an applied force of 54 N friction opposes the motion with a force of 37 N the force caused by the earth is balanced by the force cased by the floor.
Calculate the weight of the box
what are the givens
what is the equation
how to solve
Then draw a free body diagram that includes all the forces acting on the box with labels numbers and units i (if possible)
what is the net force acting on the box
finally what is the acceleration of the box what are the givens, equation and how to solve
Answer:
To summarize:
The weight of the box is 123.88 NThe net force acting on the box is 17 N (to the right)The acceleration of the box is 1.35 m/s^2 (to the right)
And the Free Body Diagram is:
\([box]^||54 N (applied force)|||v37 N (friction)\)
Explanation:
Given:
Mass of the box: 12.6 kgApplied force: 54 NFrictional force opposing motion: 37 NTo calculate the weight of the box:
The weight of an object is equal to its mass multiplied by the acceleration due to gravity (g).The weight of the box is 12.6 kg * 9.8 m/s^2 = 123.88 N (approx).Free Body Diagram:
\([box]^||54 N (applied force)|||v37 N (friction)\)
Net force acting on the box:
The net force is the vector sum of all the forces acting on the object.In this case, the net force is 54 N - 37 N = 17 N (to the right).To calculate the acceleration of the box:
The acceleration of an object is equal to the net force acting on it divided by its mass.The acceleration of the box is 17 N / 12.6 kg = 1.35 m/s^2 (to the right).A train travels with a constant speed of 20.0m/s for 7.00s. Determine all
unknowns and answer the following question(s).
What is the magnitude of the train's acceleration?
Answer:
acceleration is zero m/s²
Explanation:
It is given that the train travels at constant speed (i.e speed does not change)
If speed does not change, then the train is neither accelerating or decelerating (i.e acceleration is zero)
A basketball is made of matter. Fire itself is not matter. However, the wood that burns is matter. A basketball is very different from a fire. What are some differences that might make a basketball matter but not a fire?
Answer: A basketball is something that can have a physical or chemical change done to it.
Explanation:
A basketball is made of matter. The fire itself is not a matter however, the wood that burns is matter. A basketball is very different from a fire because a basketball has some mass in it on the other hand fire does not contain any mass
What is the matter?Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gas, and plasma.
These different states of matter have different characteristics according to which they vary their volume and shape.
For any substance to be considered as matter it must have to contain some mass and occupies some space.
As given in the problem statement a basketball is made of matter. The fire itself is not a matter however, the wood that burns is matter. A basketball is very different from a fire because a basketball has some mass in it on the other hand fire does not contain any mass.
For any substance to be considered as matter it must have to contain some mass and occupies some space.
Thus, a basketball is considered a matter but fire is not considered a form of matter.
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A drag racing vehicle travels from zero to a hundred miles per hour and 5 seconds north what is acceleration
16. True/False: Protons are exchanged between objects by induction
What is the mass of an atom with six protons, seven neutrons, and eight electrons?
Answer:
13
Explanation:
The mass of an atom= number of protons + number of neutrons
Problem 1. A steel ball with a mass of 0.110 kg travels on a smooth surface after being launched by a spring. Determine: a) the required initial deformation (s) of the spring so that the ball has a velocity of 4 m/s when passing through point A.
The equation to determine the required initial deformation (s) of the spring is k x s² = 1.76 kg m²/s².
To determine the required initial deformation (s) of the spring, we can use the principle of conservation of mechanical energy.
Given:
- Mass of the steel ball (m) = 0.110 kg
- Velocity of the ball at point A (v) = 4 m/s
The total mechanical energy of the system (spring and ball) remains constant. Initially, the ball is at rest, so its kinetic energy is zero. Thus, the total mechanical energy is equal to the potential energy stored in the compressed spring.
The potential energy (PE) stored in the spring can be calculated using the formula:
PE = 0.5 x k x s²
where k is the spring constant and s is the deformation of the spring.
Since the ball has no initial velocity, its kinetic energy at point A is given by:
KE = 0.5 x m x v²
Since the total mechanical energy is conserved, we can equate the potential energy to the kinetic energy:
0.5 x k x s² = 0.5 x m x v²
Substituting the given values:
0.5 x k x s² = 0.5 x 0.110 kg x(4 m/s)²
Simplifying the equation:
0.5 x k x s² = 0.5 x 0.110 kg x 16 m²/s²
Dividing both sides of the equation by 0.5:
k x s² = 0.110 kg x 16 m²/s²
k x s² = 1.76 kg m²/s²
Now, to solve for the deformation (s), we need the spring constant (k). Unfortunately, the question does not provide the spring constant. Without this information, we cannot determine the exact deformation of the spring required.
In conclusion, the equation to determine the required initial deformation (s) of the spring is k x s² = 1.76 kg m²/s². However, without the spring constant (k), we cannot find the exact value of s.
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An 8.5kg cat is running 1.8m/s. How much kinetic energy does it have?
Answer:
Im not sure if this is correct but it might be 15.3
Explanation:
8.5kg multiplied by 1.8 m/s is 15.3
Answer:
KE = 13.77 J
Explanation:
KE=1/2 mv^2
any two masses will be
Answer:
Explanation:
What???
a hard white translucent ceramic made of white clay is called ______. multiple choice question.
A hard white translucent ceramic made of white clay is called porcelain. Porcelain is a type of ceramic material created by heating materials, primarily white clay or kaolin, to high temperatures in a kiln.
The process involves heating the white clay to temperatures between 1200 and 1400 degrees Celsius. This results in a vitrification process that gives the ceramic its distinctive hardness, strength, and translucency.
The production of porcelain originated in China, where it has been crafted for centuries. Over time, the techniques for creating porcelain spread to other parts of the world, including Europe, where it was highly prized for its beauty and durability.
Porcelain is often used to create a variety of items, including dinnerware, decorative objects, and even electrical insulators due to its low conductivity.
Porcelain is made by combining white clay with other materials, such as feldspathic material and bone ash, to achieve the desired properties. After the raw materials are mixed, they are shaped using various techniques, such as slip casting or throwing on a potter's wheel.
Once the desired shape is achieved, the porcelain is dried and then fired in a kiln at high temperatures. The firing process allows the ceramic to become hard, dense, and translucent.
In summary, porcelain is a hard white translucent ceramic made of white clay, which is prized for its beauty, strength, and versatility. The process of creating porcelain involves heating white clay and other materials to high temperatures in a kiln, resulting in a durable and attractive material that has been used for centuries to create a wide range of objects.
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Complete Question:
A hard white translucent ceramic made of white clay is called ______.
Are three coefficients of expansion alpha bita and gamma universal constant?
Answer:
As the temperature increases, the volume of the material also increases. This is known as thermal expansion. It can also be explained as the fractional change in the length or volume per unit change in the temperature.
The relation between alpha, beta, and gamma is given in the form of a ratio and the ratio is 1:2:3 and can be expressed as:
alpha=fracbeta2=fracgamma3
Following is the relation between the three:
L = L (1 + α.ΔT)
Where, α is the coefficient of linear expansion
A = A (1 + β.ΔT)
Where, β is the coefficient of aerial expansion
V = V (1 + γ.ΔT)
Where, γ is the coefficient of cubical expansion
V = V + γV.ΔT
V = V (1 + γ.ΔT)
L3 = L3 (1 + α.ΔT)3
L3 = L3 (1 + 3α.ΔT + 3α2.ΔT2 + α3.ΔT3)
L3 = L3 (1 + 3α.ΔT)
Alpha, beta, and gamma are related to one another in the form of a ratio, and that ratio is 1:2:3, and yes they are universal constants.
What is expansion?A substance's volume expands while its mass stays constant. Heating is typically the cause of expansion. When a substance is heated, the molecular bonds separating its particles weaken, the particles move more quickly, and the substance expands as a result.
Determine the relation as shown below,
L = L (1 + α × Δ T)
here, α is the coefficient of linear expansion
A = A (1 + β × Δ T)
here, β is the coefficient of aerial expansion
V = V (1 + γ × Δ T)
here, γ is the coefficient of cubical expansion
V = V + γ × V × Δ T
V = V (1 + γ × ΔT)
L3 = L3 (1 + α × Δ T)3
L3 = L3 (1 + 3α × ΔT + 3α2 × ΔT2 + α3 × ΔT3)
L3 = L3 (1 + 3α × Δ T)
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What two factors determine the density of a fluid?
Answer:
Mass and volume.
Explanation:
The equation for density is always mass divided by volume. To determine the density of a fluid, you would need to find its volume and its mass.