a fluid is moving through a pipe of area 2a. this pipe then splits into four branches, each with the same area (1/3)a. you can assume the fluid fills the pipes completely everywhere and that differences in vertical height between the cross sections shown are negligible. where is the speed of the fluid the smallest?

The minimum allowed length for the runway is  1170m.

a=3.30m/s2 is the acceleration of the plane

v=88.0 m/s is the final velocity of the plane

u=0m /s is the initial velocity of the plane

The acceleration of the object is the slope of the v-t graph, therefore,

Slope=Change in y component / Change in the x component

a = u- v / T f - T i

T f - T i =  v/a

T f - T i = 88/3.3

T f - T i = 26.67 s

The displacement,

d=1/2 b h

d=1/2(T f - T i ) * v

d = 1/2 * 26.67 s * 88.0 m / s

d = 1173.33

   = 1170m nearest three significant figures

Hence, the minimum allowed length for the runway is 1170m answers.

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Answer:

The rate of rotation increases by a factor of 2.

Explanation:

The rate of rotation will become two times as the moment of inertia will be decreased by 2 times for the constant torque.

The torque for the rotating body will be given by the formula

\(T= I\alpha\)

Here,

T= Torque

I= Moment of inertia

\(\alpha=\) Angular acceleration / Rate of rotation

Now from the question, it is given that a rotating object experiencing no net external torque, what happens to the rate of rotation if the moment of inertia of the object decreases by  2 times.

Here moment of inertia will be   \(I'=\dfrac{I}{2}\)

So the formula will become

\(T= \dfrac{I}{2} \times \alpha\)

Now for making the Torque to be constant the acceleration should be two times  \(\alpha'=2\alpha\)

So for constant torque

\(T= \dfrac{I}{2} \times 2\alpha\)

Thus The rate of rotation will become two times as the moment of inertia will be decreased by 2 times for the constant torque.

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Answer:

Option D.

Explanation:

Data:

Use formula:

Replace:

Multiply gravity with height:

Multiply:

Solve the square root:

How fast is the ball going?

The speed is going at a speed of 13.3 meters per second.

Answer:

it's the star in the center of the star field

Explanation:

Why Doesn't Polaris Move? Polaris is very distant from Earth, and located in a position very near Earth's north celestial pole. ... Polaris is the star in the center of the star field; it shows essentially no movement. Earth's axis points almost directly to Polaris, so this star is observed to show the least movement

A doubling current through an inductor causes the energy stored there to vary by a factor of four. There is no expectation that an inductor will lose energy.

Only when necessary does it supply energy to the circuit from its storage. The voltage across the inductor will gradually change if the current is passed through it. In the 1800s, Oersted demonstrated how a conductor carrying current generates a magnetic field all around it. The movement of electrical charge carriers like electrons is known as current. Positive and negative locations both experience current flow. The ampere is the SI unit for calculating electrical current (A). A passive two-terminal electrical component known as an inductor, also known as a coil, choke, or reactor, stores energy in a magnetic field as electric current passes through it.

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A hypothesis about what might happen in the lab might be 'oxygen will react with hydrogen to form water molecules'.

A hypothesis is a given explanation of a particular scientific question emerged by observing the real world.

Hypotheses are explanations that must be tested (either confirmed or rejected) by using the scientific method.

In conclusion, a hypothesis about what might happen in the lab might be 'oxygen will react with hydrogen to form water molecules'.

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Answer:

Infared light

Explanation:

Hank's distance to work is 17.5 kilometers long.He drove at an average speed of 70 km/h on Monday and arrived 11 minutes late.He drove at an average speed of 75 km/h on Tuesday and arrived 11 minutes early.

To find the distance of Hank's route, we can use the concept of average speed and time. Since the time taken to travel on both days is the same (11 minutes), the difference in arrival time can be attributed to the difference in speed. The speed difference is 5 km/h (75 km/h - 70 km/h). Considering that the time difference is 22 minutes (11 minutes late on Monday and 11 minutes early on Tuesday), we can use the formula: Speed = Distance / Time. Solving for the distance, we get 17.5 kilometers (5 km/h * 22 minutes / 60 minutes).

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The Doppler shift approaches 0 as the listener's speed approaches the speed of sound.

In part f of the question, when the source is stationary and the listener is moving towards the source at the speed of sound, the formula for the Doppler shift becomes:

\(fl = fsv + vlv + vs\)

Since the source is stationary (vs = 0) and the listener's speed (vl) approaches the speed of sound (v), the term vlv approaches v². Therefore, the Doppler shift frequency (fl) approaches 0 as the listener's speed approaches the speed of sound.

Hence, the answer to part f is a) 0.

In part g, when the listener is stationary and the source is moving towards the listener at the speed of sound, the formula for the Doppler shift remains the same:

\(fl = fsv + vlv + vs\)

In this case, since the listener is stationary (vl = 0) and the source is moving towards the listener at the speed of sound (vs = v), the term vsv becomes v². Therefore, the Doppler shift frequency (fl) will be twice the emitted frequency (2fs) when the sound waves reach the listener.

Hence, the answer to part g is c) 2fs.

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Answer:

I belive that the 2000 kg will be going faster then the 1000kg

Explanation:

Because it is 2x as heavy as the other car which means it most likely would hit the car and keep going because it can hit it so hard that the car dosent hit effected

The first sign of carburetor ice would probably be a decrease in rpm if an aircraft had a fixed-pitch propeller and a float-type carburetor.

The temperature decrease in the carburetor as a result of gasoline evaporation and the temperature loss related to the pressure drop in the venturi is what lead to carburetor ice.

The temperature decrease in the carburetor is what leads to carburetor icing. The throttle valve will get frozen with water vapor if the temperature falls below freezing.

While initially increasing the Venturi effect, this ultimately inhibits airflow. When the outside air temperature is below 70 degrees F, carb icing most frequently happens (21 degrees C).

Engine sluggishness, loss of RPM, and loss of manifold pressure are signs of carb ice. In general, if you suspect carb ice, immediately administer carb heat or alternative air.

Hence, the first sign of carburetor ice would probably be a decrease in rpm.

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The regular satellites of the giant planets formed via the process of accretion from a circumplanetary disk.

The giant planets in our solar system, such as Jupiter, Saturn, Uranus, and Neptune, are surrounded by a system of moons, which are divided into two main categories: regular and irregular. The regular satellites are large, spherical, and have nearly circular orbits around their host planets. They are believed to have formed from a circumplanetary disk of gas and dust that surrounded the planet during its formation. The gravitational forces of the planet caused the material in the disk to accrete into small bodies, which eventually coalesced into the regular satellites we see today.

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Answer:

C

Explanation:towards Erin

The rope will move towards Erin because, the force between them is unbalanced and the more force is exerted by Erin. Hence, the displacement will occur on the greater force side.

Force is an external agent acting on a body to change its motion or to deform it. The net force acting on the body depends on the direction and magnitude of all  the force acting on it.

If two equal forces acts on the body from the same side they add up together and the net force is their sum. If the forces are acting from the opposite sides, they will cancel each other and is said to be balanced.

Here, two forces from the side is un balanced by a force from the opposite side. Hence, the greater force from Erin will make the rope displaced towards her side. Thus, option C is correct.

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Answer:

The final graph

Explanation:

The graph that curves downwards is negative acceleration. While the position decreases the slop increases.

Răspuns: 23. 6 m / s

Explicaţie:

Pentru a obține viteza medie a mașinii:

Luăm viteza medie a mașinii:

Modificarea distanței / schimbarea timpului

Schimbarea distanței:

(219 - 134) KM = 85 km

Schimbarea în timp:

(11 ore 20 min) - (10 ore - 20 min) = 1 oră

Prin urmare, viteza medie:

Schimbarea distanței / schimbarea timpului

85/1 = 85 km / oră

În metru pe secundă:

(85 * 1000) m / 3600

85000/3600 USD = 23,6 m / s

Answer:

A) speed up

is the correct option

Answer:

slows down

Explanation:

As the temperature difference decreases the rate of transfer slows (hope this helps)

Answer:

blizzard

Explanation:

A blizzard is a severe snowstorm characterized by strong sustained winds and low visibility

The magnitude of the rock's (assumed) uniform acceleration is v² - 225.

Initial speed, u = 15 m/s

Displacement, s = 50 cm = 0.5 m

Magnitude of acceleration, a = ?

We know, v² - u² = 2as

Let's substitute the given values into the above formula. v² - u² = 2as (v is the final velocity)

Final velocity, v = ?u = 15 m/s (Initial velocity)

s = 0.5 m (Displacement)

a = ?

v² - u² = 2as (v² - u²)/2s = a(v+u)/2(a = (v² - u²)/2s)

(a = (v² - u²)/2s)(a = (v² - (15 m/s)²)/2(0.5 m))(a = (v² - 225)/1)(a = v² - 225)

Therefore, the magnitude of the rock's  uniform acceleration is v² - 225, given that a rock hits the ground at a speed of 15 m/s and leaves a hold 50 cm deep after it hits the ground.

The magnitude of the rock's  uniform acceleration is v² - 225.

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The concentrated reaction to the column due to the weight of the slab on a single level is 37,500 lb.

To calculate the concentrated reaction to the column, we need to determine the total weight of the slab on a single level.

Given that the weight of the 6-inch concrete slab is 75 psf (pounds per square foot), we first convert it to pounds per square inch (psi) by dividing by 144 (since 1 square foot is equal to 144 square inches).

Weight of slab per unit area = 75 psf / 144 = 0.5208 psi

Next, we calculate the area of the slab on a single level by multiplying the spacing in the long direction (25 ft) by the spacing in the short direction (20 ft).

Area of slab = 25 ft * 20 ft = 500 sq. ft

Finally, we multiply the weight per unit area by the area of the slab to find the total weight of the slab on a single level.

Total weight of slab = 0.5208 psi * 500 sq. ft = 260.4 lb

Therefore, the concentrated reaction to the column due to the weight of the slab on a single level is 37,500 lb.

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The height of the board above the ground is 10 m. see the section below for calculation

We know that the expression for distance is given as

Work = Force x Distance

Substituting into then expression above we have

8000 J = 800 N x Distance

Making distance subject of formula we have

Distance = 8000 J / 800 N

Distance = 10 m

Distance is a measure of how far two points are from each other. For example, if a person were to walk 10 meters, the distance they have traveled is 10 meters.

Distance can also refer to the amount of work done by a certain force, such as when lifting an object. In this case, the work done is measured in units of Joules, and the force in Newtons. The distance is then calculated by dividing the work done by the force. Therefore, distance is a measure of how far two points are from each other, as well as a measure of the amount of work done by a certain force.

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An engine moves a boat through the water at a constant speed of 15 m/s. The engine must exert a force of 6.0 kN to balance the force that the water exerts against the hull. Power is the measure of how fast work can be done. The unit of power is watts (W), which can be defined as the amount of work done in one second.

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Answer:

Explanation:

alpha

Alpha Radiation (α): A large, unstable nucleus decays to produce a smaller, more stable nucleus and an alpha particle (identical to a helium nucleus, ⁴₂He or ⁴₂α).

It has a very high ionizing energy and low penetrating power. It can be stopped by paper skin

Beta Radiation (β): A neutron in an unstable nucleus decays, forming a proton and emitting a beta (β) particle (identical to an electron, ⁰₋₁e or ⁰₋₁b) and resulting in a more stable nucleus.

It has high ionizing energy and penetrating power. It can be stopped by aluminium sheet

Gamma Radiation (γ): An unstable nucleus releases energy in the form of a high energy photon (no mass)to become more stable; this often accompanies other forms of radioactivity.

It has very high penetrating power and very low ionizing energy. It can be stopped by lead block.

Answer:

the answer is A

Explanation:

This means that a system always has the same amount of energy

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside

Answer: Heyaa! ~

Microwaves have a little more energy than radio waves.

Explanation:

The prior difference between a radio wave and microwave is that the microwave has a shorter wavelength as compared to radio wave.

Hopefully this helps you!

- Matthew ^^

Microwaves have a higher frequency than radio waves so more information can be conveyed. Not only that, they have the ability to transmit signals over a long distance without losing any data.

Beyond the shallow-water zone of ponds and lakes is the pelagic zone. The pelagic zone is the open-water region that extends beyond the shallow areas and reaches down to the depth of light penetration. It is also known as the limnetic zone in freshwater environments.

In the pelagic zone, sunlight can penetrate to a certain depth, allowing photosynthesis to occur. This depth varies depending on factors such as water clarity and the presence of suspended particles. The upper layer of the pelagic zone, where sufficient sunlight reaches, is called the euphotic zone. This is where primary production, carried out by phytoplankton and other photosynthetic organisms, takes place.

The pelagic zone is characterized by its vast expanse of open water and is home to a diverse array of organisms. Zooplankton, small fish, and other aquatic organisms inhabit this zone and form the basis of the food web. Predatory fish, such as trout and bass, are often found in the pelagic zone, preying on the smaller organisms.

Overall, the pelagic zone plays a crucial role in the ecology and productivity of aquatic ecosystems, supporting a wide range of organisms and contributing to the overall biodiversity of lakes and ponds.

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Answer:

  2. Colliding with the padded wall will make the force 10 times smaller

Explanation:

Impulse is the product of force and time. Its units are those of momentum. Assuming the change in momentum (impulse) remains the same, the increase in time means the force will be decreased by the same factor.

Colliding with the padded wall will make the force 10 times smaller

Answer:

The height of the wall is 45 m

Explanation:

Horizontal Motion

When an object is thrown horizontally with an initial speed v from a height h, the maximum horizontal distance traveled by the object, also called the range can be calculated as follows:

\(\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}\)

If we know the range and want to calculate the height it was thrown from, we solve the equation for h:

\(\displaystyle h=\frac{d^2g}{2v^2}\)

We'll use the approximate value of g=10\ m/s^2.

The stone was thrown from the top of a wall with a speed of v=15 m/s and it hits the ground d=45 m away from the base of the wall. Calculating:

\(\displaystyle h=\frac{45^2\cdot 10}{2\cdot 15^2}\)

\(\displaystyle h=\frac{2025\cdot 10}{2\cdot 225}\)

\(\displaystyle h=\frac{20250}{450}\)

h = 45 m

The height of the wall is 45 m

The acceleration due to gravity on asteroid X is approximately 0.5 m/s². The acceleration an object experiences as a result of gravitational force is known as acceleration due to gravity.

To calculate the acceleration due to gravity on asteroid X, you need to first determine the mass of the astronaut. Since weight is a measure of the force of gravity on an object, and the force of gravity is directly proportional to the mass of the object, the mass of the astronaut can be calculated by dividing the weight on Earth by the acceleration due to gravity on Earth.

The acceleration due to gravity on Earth =  9.8 meters per second

      The mass of the astronaut = 500 Newtons / 9.8 m/s^2, 50 Kg

       The equation for gravitational force is F = Gm1m2/r^2,

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them . Solving for r, you can calculate that the distance between the               astronaut and the center of asteroid X is approximately 5 meters. That is 0.5 m/s².

Therefore, The acceleration due to gravity on asteroid X is approximately 0.5 m/s². The acceleration an object experiences as a result of gravitational force is known as acceleration due to gravity.

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Justin is employing the "Re-evaluation" of the Four Rs, which refers to re-examining and reassessing the situation. This includes reflecting on what he did in the job application process, such as his interview questions and resume errors, to gain insight into why he was not hired. This reflection is beneficial in helping Justin learn and improve his skills and techniques, enabling him to become better prepared for future job opportunities.

It is used to clarify any matters which have become unclear during cross-examination; It is used to ask further questions about something which was put to the witness in cross-examination; It is used to ask further questions about an answer given by a witness during cross-examination.

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