A rainbow that you view via a train window while riding will follow you as you travel forward. The rainbow won't be visible for very long because it will appear to move with you as the train travels along its course.
This occurs as a result of the sun, precipitation, and your eyes' angle constantly shifting as the train travels, which also causes the rainbow's position to change.
The rainbow won't be visible for very long because it will appear to move with you as the train travels along its course. This phenomena also affects other moving objects and landscapes, such as mountains, trees, and buildings, in addition to rainbows.
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A rainbow that you view via a train window while riding will follow you as you travel forward. The rainbow won't be visible for very long because it will appear to move with you as the train travels along its course.
explanation - If you view a rainbow out your window while riding in a train, you'll see that the rainbow moves along with you. As you move forward, the angle between the sun, your eyes, and the raindrops that create the rainbow changes, causing the rainbow to appear to move with you. However, if the train is moving too fast, you may soon pass by it, leaving it where you first saw it. therefore - its position appears relative to the viewer's location and angle of observation, hence option is B
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meteorites that strike the earth may be composed of
A meteorites that strike the earth may be composed of chondrites and achondrites.
A meteorite is a piece of solid debris from a space-born object, such as a comet, asteroid, or meteoroid, that makes it through the atmosphere and lands on the surface of a planet or moon and it is made up of chondrites and achondrites.
The object heats up and emits energy as it enters the atmosphere due to a number of causes, including friction, pressure, and chemical reactions with the atmospheric gases. Astronomers refer to the brightest examples as "bolides"; it then transforms into a meteor and creates a fireball, also known as a shooting star or falling star. The sizes of meteorites vary widely. A bolide is a meteorite big enough to crater, according to scientists.
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What force will cause a displacement of 2m, while doing a work of 50J
Using the work done relation, the value of force is 25 Newton.
When a force is applied along a displacement, "work" in physics refers to the energy that is transported to or away from an object. The following situations include work: relocating a table. a door being pulled and pushed. Walking. raising a stone.
The work W that a force F traveling across a distance x exerts on an object is calculated using the formula W=Fs. If the object is moving in the opposite direction from how we expect it to, we add a minus sign.
Work done is equal to displacement times force.
50J = force × 2
f=50/2
Force = 25 Newton.
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a wire with a weight per unit length of 0.081 n/m is suspended directly above a second wire. the top wire carries a current of 29.1 a and the bottom wire carries a current of 59.5 a. find the distance of separation between the wires so that the top wire will be held in place by magnetic repulsion.
The distance of separation between the wires so that the top wire will be held in place by magnetic repulsion is 0.00428 m or approximately 4.28 mm.
To find the distance of separation between the wires, we can use the formula for the magnetic force between two parallel wires carrying currents. The force per unit length between two parallel wires carrying currents I1 and I2, separated by a distance d is given by:
F = μ0/2π × I1 × I2 / d
where μ0 is the permeability of free space, which has a value of 4π x \(10^{-7}\) N/A².
In this problem, the top wire is carrying a current of I1 = 29.1 A and the bottom wire is carrying a current of I2 = 59.5 A. The force per unit length on the top wire due to the magnetic repulsion from the bottom wire is equal to its weight per unit length, which is given as 0.081 N/m. So we have:
F = 0.081 N/m
I1 = 29.1 A
I2 = 59.5 A
μ0 = 4π x \(10^{-7}\) N/A²
Substituting these values in the formula above, we can solve for the distance d:
d = μ0/2π × I1 × I2 / F
d = (4π x \(10^{-7}\) N/A²)/(2π) × 29.1 A × 59.5 A / 0.081 N/m
d = 0.00428 m
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Question 1 (2 points)
Nate swings a rubber ball attached to a string over his head in a horizontal, circular
path. The piece of string is 1.75 m long and the ball makes 120 complete turns each
minute.
a) What is the average velocity of the ball?
b) What is the ball's centripetal acceleration?
PLEASE HELP
(a) The average velocity of the ball is 22 m/s.
(b) The centripetal acceleration of the ball is 276.35 m/s².
What is the average velocity of the ball?The average velocity of the ball is calculated by applying the following formula.
v = ωr
where;
ω is the angular speedr is the radiusv = ( 120 rev/min x 2π rad/rev x 1 min/60s) x 1.75 m
v = 22 m/s
The centripetal acceleration of the ball is calculated as follows;
a = v² / r
a = ( 22² ) / 1.75
a = 276.35 m/s²
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Fill in the blanks to complete the statements.
If an object changes speed or
, its velocity also changes. Any change in ______ results in acceleration.
Answer: velocity
Explanation: Acceleration = change in velocity / time interval
5m/s to 25 m/s, in 2 seconds. So 25m/s - 5 m/s, then divide by time =
10m/s squared
Consider two cars, with the second car having a mass six times the mass of the first car. Compare the kinetic energy of each car. Then describe the implications of your answer for using brakes to bring each car to a complete stop.
Answer:
The kinetic energy of an object is directly proportional to its mass and the square of its velocity. This means that if the mass of an object is increased, its kinetic energy will also increase.
In the case of the two cars, the second car has a mass six times the mass of the first car. This means that the kinetic energy of the second car will be six times greater than the kinetic energy of the first car.
Therefore, the implications of the second car having six times the kinetic energy of the first car is that it will require more force and heat energy to bring it to a stop using the brakes. This may require the use of more advanced braking systems, such as brakes with larger calipers or brake discs, in order to effectively stop the car in a safe and timely manner.
A non -viscous incompressible fluid is pumped steadily into the narrow end of a long tapered pipe and emerges from the wide end . The pressure at the input is greater than at the output . A possible explanation is :
Answer:
v₂ =\(( \frac{r_1}{r_2})^2 \ v_1\)
Explanation:
This phenomenon is explained by the continuity equation in fluids
v₁A₁ = v₂A₂
where the subscript 1 is for the input narrow part and the subscript 2 for the wide part
v₂ = \(\frac{A_1}{A_2} v_1\)
consider the cross section at each point
A₁ = π r₁²
A₂ = π r₂²
we substitute
v₂ =\(( \frac{r_1}{r_2})^2 \ v_1\)
therefore the exit velocity is less than the entrance velocity of the fluid.
We can also analyze the situation using Bernoulli's equation
P₁ + ρ g v₁² + ρ g y₁ = P₂ + ρ g v₂² + ρ g y²
if we assume a horizontal system y₁ = y₂
P₁-P₂ = ρ g (v₂² - v₁²)
A small, 200 g cart is moving at 1.70 m/s on a frictionless track when it collides with a larger, 2.00 kg cart at rest. After the collision, the small cart recoils at 0.830 m/sWhat is the speed of the large cart after the collision? Express your answer to three significant figures and include the appropriate units.
The speed of the large cart after the collision would be 0.087 m/s
Momentum problemWe can use the law of conservation of momentum to solve this problem, which states that the total momentum of a closed system remains constant before and after a collision.
The momentum before the collision is given by:
p1 = m1v1 + m2v2
where m1 = 0.2 kg is the mass of the small cart, v1 = 1.70 m/s is its velocity before the collision, m2 = 2.00 kg is the mass of the large cart, and v2 = 0 m/s is its velocity before the collision.
p1 = (0.2 kg)(1.70 m/s) + (2.00 kg)(0 m/s) = 0.34 kg m/s
The momentum after the collision is also given by:
p2 = m1v1' + m2v2'
where v1' = -0.830 m/s is the velocity of the small cart after the collision (since it recoils in the opposite direction), and we want to find v2', the velocity of the large cart after the collision.
p2 = (0.2 kg)(-0.830 m/s) + (2.00 kg)(v2')
Since momentum is conserved, we have:
p1 = p2
0.34 kg m/s = (0.2 kg)(-0.830 m/s) + (2.00 kg)(v2')
Solving for v2', we get:
v2' = (0.34 kg m/s - 0.166 kg m/s) / 2.00 kg
v2' = 0.087 m/s
Therefore, the speed of the large cart after the collision is 0.087 m/s, to three significant figures.
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a(n) ? can be used to test a mechanical switch for an open circuit.
A multimeter can be used to test a mechanical switch for an open circuit. An open circuit occurs when there is a break in the circuit, causing the flow of current to stop.
To test for an open circuit in a mechanical switch, the multimeter needs to be set to the resistance or continuity mode. The leads of the multimeter are then placed on the terminals of the switch. If the switch is closed, there should be continuity, and the multimeter will display a low resistance reading.
If the switch is open, there will be no continuity, and the multimeter will display a high resistance reading. By testing for an open circuit in a mechanical switch, it is possible to identify if the switch is faulty or if there is an issue with the wiring or other components in the circuit.
This information can then be used to make the necessary repairs or replacements to ensure the proper functioning of the system.
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Which organelle packages materials and distributes them throughout the cell?
O lysosome
O chloroplast
O Golgi body
O cell membrane
Answer:
golgi body
Explanation:
i took the test
Organelle packages materials and distributes them throughout the cell through the Golgi body (also known as the Golgi apparatus or Golgi complex). The correct option is C.
The Golgi body plays a crucial role in the packaging, modifying, and sorting of proteins and lipids synthesized in the endoplasmic reticulum (ER). It receives these molecules from the ER and then modifies them, such as by adding sugars or lipids. The Golgi apparatus then packages these molecules into vesicles and distributes them to their appropriate destinations within the cell, such as other organelles or the cell membrane.
A. Lysosome: Lysosomes are organelles responsible for the digestion of waste materials, cellular debris, and foreign substances. They contain enzymes that break down various molecules. Lysosomes are not involved in packaging and distributing materials throughout the cell.
B. Chloroplast: Chloroplasts are organelles found in plant cells responsible for photosynthesis, the process by which sunlight is converted into chemical energy. Chloroplasts are involved in producing energy-rich molecules (such as glucose) rather than packaging and distributing materials within the cell.
D. Cell membrane: The cell membrane (also known as the plasma membrane) is a semipermeable barrier that surrounds the cell, separating its internal environment from the external environment. While the cell membrane controls the entry and exit of substances into and out of the cell, it is not directly involved in packaging and distributing materials within the cell.
Therefore, the Golgi body is the correct answer as it specifically carries out the task of packaging and distributing materials throughout the cell.
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A balloon is launched straight upward and has a hang time of 14 s. (wow)
A.) What was the launching velocity of the balloon?
B.) How high did the balloon travel?
C.) How far did the balloon travel between t = 3 and t = 4 s?
Answer:
A) Vo = 137.34 [m/s]
B) Y = 961.38 [m]
C) y = 367.8[m] for t = 3 [s] and y = 470.88[m] for t = 4[s]
Explanation:
To solve this problem we must use the following equation of kinematics. We must keep in mind that the negative sign of the equation means that the acceleration of gravity acts in the opposite direction to the movement of the balloon.
A)
\(v_{f} =v_{o} -g*t\)
where:
Vf = final velocity = 0 (the maximum hang time, maximum elevation)
Vo = initial velocity [m/s]
g = gravity acceleration = 9.81 [m/s²]
t = time = 14 [s]
0 = Vo - (9,81*14)
Vo = 137.34 [m/s]
B)
Now we use the following equation.
\(y=y_{o}+v_{o} *t -(\frac{1}{2} )*g*t^{2}\)
where:
Yo = initial position = 0
Y = final position [m]
Vo = initial velocity = 137.34 [m/s]
Now replacing
Y = (137.34*14) - (0.5*9.81*14²)
Y = 961.38 [m]
C)
With the above equation, we can calculate the distances between t = 3 and t = 4 [s]
\(y=y_{o} +v_{o} *t - (1/2)*g*t^{2}\)
y = (137.34*3) - (0.5*9.81*3²)
y = 367.8[m] for t = 3 [s]
for t = 4[s]
y = (137.34*4) - (0.5*9.81*4²)
y = 470.88[m]
A fast humvee drove from desert a to desert b for the first 12 hours it travelled at an average speed of 185km/h for the next 13 hours it travelled at an average speed of 160km/h what was the average speed of the whole journey
Answer:
The average speed of the whole journey is, v = 172 km/h
Explanation:
It is given that, a fast humvee drove from desert a to desert b. The scenario is as follows :
For the first 12 hours, it traveled at an average speed of 185 km/h. Let d₁ is distance. So,
\(d_1=v_1\times t_1\\\\d_1=185\ km/h\times 12\ h\\\\d_1=2220\ km\)
For the next 13 hours, it traveled at an average speed of 160 km/h. Let d₂ is the distance. So,
\(d_2=v_2\times t_2\\\\d_2=160\ km/h\times 13\ h\\\\d_2=2080\ km\)
Average speed = total distance/time taken
So,
\(v=\dfrac{d_1+d_2}{t_1+t_2}\\\\v=\dfrac{2220+2080}{12+13}\\\\v=172\ km/h\)
Therefore, the average speed of the whole journey is 172 km/h.
Kieran ran 8 laps of the track in 18 minutes. Jevon ran 6 laps of the track. Who had a greater average speed
Kieran had a greater average speed than Jevon. Let us go into more detail in the explanation below. To compare the average speeds of Kieran and Jevon, we need to find out the speed of each person.
We can use the formula speed = distance/time. Kieran ran 8 laps in 18 minutes, which means he ran 8/18 = 0.44 laps per minute. To find out Kieran's speed, we need to multiply this by the length of one lap. If we assume that the length of one lap is 400 meters, then Kieran's speed is:0.44 laps per minute × 400 meters per lap = 176 meters per minute Jevon ran 6 laps of the track, but we don't know how long it took him.
Therefore, we can't calculate his speed directly. However, we can still compare his speed to Kieran's by using ratios. If we assume that Jevon ran the same length of track as Kieran, then we can write the following equation: Kieran's speed/Jevon's speed = Jevon's time/Kieran's time.
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A man is pushing a heavy crate up an inclined plane into the back of semi trailer.What can the man do to make it easier to get the crate up the ramp
Answer:
B) Make the ramp longer
Explanation:
A machine is a device that makes work more easier and faster. A machine also saves time.
A ramp is a simple machine that is used to lift heavy object with a force that is lesser than the actually force needed. A ramp is in the shape of an inclined plane, which makes pushing an object easier than the required force needed.
The formula for a ramp is given by:
Force needed to push * length of the ramp = weight of object * height of ramp.
Force needed to push = (weight of object * height of ramp) / length of ramp
We can see that the force needed is inversely proportional to the ramp length. Hence for a ramp with longer length you need lesser force to raise the object.
Please explain the different ways offense can score and how many points each way is worth? Answer in complete sentences.
Answer:
what sport bruh
Explanation:
Answer:
in wat sport exactly
Explanation:
in eat sport
What is cytoplasm? Cells
Answer: the gelatinous liquid that fills the inside of a cell
Explanation: it’s a liquid made up of water,salt, and organic molecules.
Name two types of waves. What properties do these waves share?
Answer:
Waves come in two kinds, longitudinal and transverse. Transverse waves are like those on water, with the surface going up and down, and longitudinal waves are like of those of sound, consisting of alternating compressions and rarefactions in a medium.
What is the radius of a planet that has the same mass as earth but on which the free-fall acceleration is 4.90 m/s2 ?
The radius of a planet that has the same mass as earth but on which the free-fall acceleration is 4.90 m/s² is 9 M m
g = G M / R²
g = Acceleration due to gravity
G = Gravitational constant
M = Mass
R = Radius
g = 4.9 m / s²
G = 6.67 * \(10^{-11}\) m³ / kg s²
M = 5.97 * \(10^{24}\) kg
R² = ( 6.67 * \(10^{-11}\) * 5.97 * \(10^{24}\) ) / 4.9
R² = 81.3 * \(10^{12}\).
R = 9 * \(10^{6}\) m
R = 9 M m
Acceleration due to gravity is the acceleration produced by a planet. If an object is falling, it will gain some acceleration due to gravitational force.
Therefore, the radius of a planet is 9 M m
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De acuerdo al calendario ecológico 2020, escriba cuanto CO2 produce el Ecuador y en un resumen máximo de 7 líneas, determine porque son importante los humedales en la biodiversidad.
Answer:
43,919.66 Kilotones de Co2 en 2016.
Explicación:
Ecuador produce 43,919.66 Kilotones de Co2 en 2016. Las tierras húmedas son muy importantes para la biodiversidad porque proporcionan hábitat a millones de animales. Alrededor del 35 por ciento de todas las especies amenazadas y en peligro vive en estas tierras húmedas. Estas tierras húmedas son altamente productivas y tienen la capacidad de mejorar la calidad del agua, prevenir la degradación del suelo y proporcionar alimentos a los animales que viven en estas tierras húmedas.
how many valence electrons do the alkaline earth metals possess?
The highest-energy orbitals of the alkaline earth metals contain two valence electrons.
Any of the six chemical elements that make up Group 2 of the periodic table are alkaline earth metals. The constituent elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). The alkaline-earth metals' oxides are fundamental (i.e., alkaline, in contrast to acidic). From beryllium, the lightest member of the group, to radium, the heaviest, there is a fairly consistent rise in electropositive character. Because of this pattern, barium oxide is very basic, but beryllium oxide is really amphoteric. Being extremely reactive reducing agents, metals rapidly give up their electrons to other compounds that are being reduced as a result.
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All the very heavy atoms found in the earth were created long ago by nuclear fusion reactions in a supernova, an exploding star. The debris spewed out by the supernova later coalesced to form the sun and the planets of our solar system. Nuclear physics suggests that the uranium isotopes 235U(t1/2=7.04×108yr) and 238U(t1/2=4.47×109yr) should have been created in roughly equal amounts. Today, 99.28% of uranium is 238U and 0.72% is 235U. How long ago did the supernova occur?
Nuclear physics suggests that the uranium isotopes 235U(t1/2=7.04×108yr) and 238U(t1/2=4.47×109yr) should have been created in roughly equal amounts. Today, 99.28% of uranium is 238U and 0.72% is 235U. The supernova occurred approximately 4.99 billion years ago.
To determine how long ago the supernova occurred, we can use the concept of radioactive decay and the known half-lives of the uranium isotopes.
Given:
Half-life of 235U (t1/2) = 7.04 × 10^8 years
Half-life of 238U (t1/2) = 4.47 × 10^9 years
Abundance of 235U today = 0.72%
Abundance of 238U today = 99.28%
Let's assume that initially, both isotopes were present in equal amounts (50% each) when the uranium atoms were created in the supernova.
We can use the ratio of the isotopes' abundances today to determine the number of half-lives that have passed since the supernova. The ratio of 238U to 235U is given by:
Ratio = (Abundance of 238U) / (Abundance of 235U)
Ratio = 99.28% / 0.72%
Ratio = 137.6
Now, we can calculate the number of half-lives that have passed:
Number of half-lives = log(Ratio) / log(2)
Number of half-lives = log(137.6) / log(2)
Number of half-lives ≈ 7.1
Since each half-life represents a duration equal to the respective isotope's half-life, we can multiply the number of half-lives by the half-life of either isotope to determine the time elapsed since the supernova:
Time elapsed = Number of half-lives * Half-life of 235U (or 238U)
Time elapsed ≈ 7.1 × 7.04 × 10^8 years
Time elapsed ≈ 4.99 × 10^9 years
Therefore, the supernova occurred approximately 4.99 billion years ago.
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What is the displacement of a cyclist who travels 2 miles north, 2 miles east, and finally 2 miles south?
The displacement of the cyclist is obtained as 2.
What is the displacement?We have to note that the displacement is a vector quantity and as such the direction of the displacement is taken to be very important as we are discussing the topic. We have to look not just at the magnitudes but also at the direction of the movement.
We have that; a cyclist who travels 2 miles north, 2 miles east, and finally 2 miles south. The displacement is then; 2 - 2 + 2 = 2
Thus the displacement of the cyclist can be taken as 2.
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Name two sub-kingdoms of plant kingdoms
Answer:
⭐. cryptogams ( non-flowering & non-seed bearing)
⭐. phanerogams ( flowering & seed bearing)
Based on the forces of inertia and momentum, ________ varies according to speed, weight, and the distance between impact and stop.
The amount of force required to stop an object, based on the forces of inertia and momentum, varies according to speed, weight, and the distance between impact and stop.
Inertia is the tendency of an object to remain in motion unless acted upon by an outside force, while momentum is the product of an object's mass and velocity. The amount of force required to stop an object is proportional to its mass, velocity, and the distance it needs to travel before it comes to a stop. The greater the mass, velocity, and distance, the more force is required to stop the object.
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The speed of light in water is 230Mm/s. Suppose an electron is moving through water at 250 Mm/s . Does that violate the principle of relativity? Explain.
It does not violate the principle of relativity because the speed of the electron in water can explained as its relative speed with water.
What is principle of relativity?
The principle of relativity states that there is no physical way to differentiate between a body moving at a constant speed and an immobile body.
If the speed of light in water is 230Mm/s and an electron is moving through water at 250 Mm/s, it does not violate the principle of relativity because the speed of the electron in water can explained as its relative speed with water.
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If, during a stride, the stretch causes her center of mass to lower by 10 mm , what is the stored energy
The stored energy can be represented as 0.0981m Joules, where m is the mass of the person in kilograms. Given that the stretch during a stride lowers the center of mass by 10 mm, we can calculate the stored energy using the following steps:
1. First, we need to convert the 10 mm to meters for consistency in units. To do this, divide 10 by 1000: 10 mm = 0.01 m.
2. Next, we need to determine the force acting on the center of mass due to gravity. This force is the product of the mass (m) and the acceleration due to gravity (g). The formula for this is F = m × g, where g is approximately 9.81 m/s². We don't have the mass, so we'll keep the formula as F = m × 9.81.
3. Now, we can calculate the potential energy stored in the system as the center of mass lowers. Potential energy (PE) is the product of force (F), displacement (d), and the cosine of the angle (θ) between them. In this case, the angle is 0° since the force and displacement are in the same direction, and the cosine of 0° is 1. So, PE = F × d × cos(θ) = (m × 9.81) × 0.01 × 1.
4. Simplify the equation: PE = 0.0981m (Joules).
Since we don't have the mass (m) of the person in question, the stored energy can be represented as 0.0981m Joules, where m is the mass of the person in kilograms.
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What does the area of an acceleration time graph represent?
The area under the acceleration time graph represents change in velocity
The graph is plotted with acceleration on the vertical axis and time on the horizontal axis. The area under such graph represents change in velocity
The area of an acceleration- time graph represents the change in velocity. The pace at which a body's velocity varies is represented by acceleration, which is a vector quantity.
What is acceleration?The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.
The formula for acceleration is;
\(\rm a = \frac{v-u}{t}\)
u is the initial speed
v is the final speed
t is the time interval
a is the acceleration of a ball
Hence the area of an acceleration- time graph represents the change in velocity.
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What is the difference between abiotic and biotic factors?
Answer:
Abiotic referfers to non-living and biotic factors are living or once living
Explanation:
Three containers are used in a chemistry lab. All containers have the same bottom area and the same height. A chemistry student fills each of the containers with the same liquid to the maximum volume. Which of the following is true about the pressure on the bottom in each container? (A) P, > P2>P3 (B) P,
P3 (D) P: > P2
P1=P2=P3 is true about the pressure on the bottom in each container.
P=F/A
same area and same force lead to same pressure.
Pressure is defined as force/area. To calculate the pressure that snow exerts on a roof, divide the weight of the snow by the roof's surface area. Gases are a typical pressure source in physics. A "vacuum" is used to describe the absence of pressure. People have long held the belief that vacuums are improbably rare and unnatural because "nature abhors a vacuum." Actually, this is not the case.
The number of pressure units is ridiculous. The units torr or mmHg are frequently employed. The only subject of conversation is the height of a mercury column. The atmosphere contains 760 torr, or mmHg. You could also look at mmH2O, which makes use of a related idea.
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A gymnast jumps upward with an initial speed of 10 m/s. She is in the air for a total time of
A. 1 second
B. 5 seconds
C. 2 seconds
D. 10 seconds
A gymnast, who jumps upward with an initial speed of 10 m/s, is in the air for a total time of C. 2 seconds.
Consider the factors affecting the gymnast's motion, which are initial speed, gravity, and time. When the gymnast jumps, she experiences Earth's gravity, which causes a downward acceleration of approximately 9.8 m/s². We can use the formula t = (2*v₀) / g to find the total time in the air, where t is the total time, v₀ is the initial speed, and g is the acceleration due to gravity.
Plugging in the given values, we get t = (2*10 m/s) / 9.8 m/s² ≈ 2.04 seconds. Since the available choices are in whole numbers, we can round this value to the nearest second, which is 2 seconds. So, the gymnast is in the air for a total time of 2 seconds (C).
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