if the thermal bulb assembly develops a leak, what will occur? all of the system's refrigerant will leak out. the bulb pressure will reduce and the valve will close. the valve will open to allow more refrigerant to flow. it will have no effect on system operation

The motion of the bus during the 70 seconds shown on the graph includes an initial acceleration, followed by periods of steady speed and deceleration.

Based on the given velocity-time graph, the motion of the bus during the 70 seconds can be described as follows. Initially, the bus is at rest, indicated by the velocity of 0 m/s at the start of the time period. As time progresses from 0 to 10 seconds, the velocity increases steadily, reaching 20 m/s. This indicates that the bus is accelerating and gaining speed. From 10 to 20 seconds, the velocity decreases from 20 m/s to 15 m/s. This implies that the bus is decelerating, but it is still moving forward. During this time, the bus is slowing down but not coming to a complete stop. Between 20 and 40 seconds, the velocity remains constant at 15 m/s. This suggests that the bus is traveling at a steady speed without any acceleration or deceleration. It is maintaining a uniform velocity during this time period.From 40 to 50 seconds, the velocity decreases further to 10 m/s, indicating that the bus is decelerating again. This means the bus is slowing down once more. Finally, from 50 to 70 seconds, the velocity remains constant at 10 m/s, suggesting that the bus is traveling at a steady speed again.

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false. when you get an xray all the doctors are doing is taking a pic of your bones.

the maximum height reached by ball is 0.45m.

Given :-

spring constant ( k ) = 400N/m

mass of ball = 1kg

spring compressed ( x )= 0.150m

we calculate height by using mechanical energy conservation According to the principle of conservation of mechanical energy, The total mechanical energy of a system is conserved .

Mechanical energy is the sum of the potential and kinetic energies in a system :-

K₀ + U₀ = K + U    (eq 1)                    

where,

           K₀ = initial kinetic energy = 0

           U₀ = initial potential energy = \(\frac{1}{2} kx^{2}\)

           K = final kinetic energy when it reaches at its max height =0

           U = final potential energy when it reaches at its max height =mgh

The elastic potential energy is = \(\frac{1}{2} kx^{2}\)

                                                     =  0.5 × 400 × 0.15 × 0.15

                                                     = 4.5 J.  

putting value in eq 1 :-

                                    0 + 4.5 = 0 + mgh

                                     4.5 = 10h

                                      h=0.45m

Thus from the above conclusion we can say that the maximum height reached by the ball is 0.45m.

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Without the mass, we cannot determine the exact velocity.

To calculate the velocity of a moving object given its kinetic energy, we need to use the formula for kinetic energy:

Without knowing the mass of the object, we cannot calculate the exact Kinetic Energy (KE) = (1/2) * mass * velocity^2

In this case, we are given the kinetic energy (KE) as 4 kg. Let's assume the mass of the object is denoted as "m" and the velocity as "v". We can rearrange the formula to solve for velocity:

4 = (1/2) * m * v^2

Dividing both sides of the equation by (1/2) * m, we get:

8/m = v^2

Taking the square root of both sides, we have:

√(8/m) = v

Now, to find the value of "m" in order to solve for "v", we need additional information. If we are given the mass of the object, we can substitute that value into the equation.

It's important to note that the equation above assumes that the object is moving in a straight line and there are no external forces acting on it, such as friction or air resistance. If those factors are present, the actual velocity of the object may differ.

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Insulators tend to hold their electric charge very well.

Insulators are materials that do not conduct electricity very well, as their electrons are tightly bound to their atoms and do not move freely. This makes them very good at holding onto electric charge. In contrast, conductors, such as metals, allow electric charge to flow through them easily.

The ability of a material to hold onto its electric charge is measured by its capacitance, which is defined as the ratio of the electric charge stored in a system to the voltage across it. The higher the capacitance of a material, the more electric charge it can hold for a given voltage.

The capacitance of an insulator can be calculated using the formula:

C = εA/d

where C is the capacitance, ε is the permittivity of the insulating material (a measure of its ability to store electric charge), A is the area of the insulating material, and d is the distance between the two conductive plates that sandwich the insulating material.

Insulators tend to hold their electric charge very well because their tightly-bound electrons make it difficult for electric charge to escape. Their capacitance is high, meaning they can store a lot of electric charge for a given voltage. Examples of insulators include rubber, glass, and plastic.

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Answer:

i would like some more explanation i dont understand the question enough

Explanation:

Answer:

Its D.

Explanation:

Solar flux is best described by the equation: Solar flux = Irradiance * Area. The "solar constant," or solar flux just outside Earth's atmosphere, has a value of around 1373 W m 2.

Irradiance times the area where: Irradiance (E), which is commonly measured in Watts per square metre (W/m2), is the amount of energy per unit area that falls on a surface.

The area (A), which is expressed in square metres (m2), represents the surface area that is exposed to the sun. The quantity of energy that can be caught by solar panels, the amount of energy that is accessible for solar heating systems, and other uses are all determined using the solar flux formula, which indicates the entire amount of energy that is falling on a certain region. The calculation accounts for both the amount of the sun-exposed surface area and the strength of the solar radiation hitting the ground.

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The diver straightens out their body before entering the water to decrease angular momentum, allowing for a smoother entry and reducing the risk of injury. Therefore, the answer is option B) to decrease angular momentum.

To calculate the forearm's moment of inertia about the center of mass, we can use the formula:

I = m * k^2

Where:

m is the forearm mass, which is 1.6% of the total body mass, or 0.016 * 68 kg.

k is the radius of gyration about the center of mass, which is 42% of the forearm length from the elbow, or 0.42 * 0.39 m.

Substituting the values into the formula, we can find the moment of inertia.

6. To calculate the forearm's moment of inertia about the elbow, we can use the parallel axis theorem, which states that the moment of inertia about a parallel axis is related to the moment of inertia about the center of mass:

I_elbow = I_center of mass + m * d^2

Where:

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By applying the density formula, it can be concluded that the volume of the iron is 5.89 dL.

Density is a measurement of the mass per unit volume of an object.

ρ = m / v  where

m = mass

v = volume

An iron has:

ρ = 7.86 g/cm³ = (7.86 * 10⁻³) kg / 10⁻² dL = 7.86 * 10⁻¹ kg/dL

m = 4.63 kg

So the volume (in dL) can be calculated as follows:

Volume = mass / density

             = 4.63 / 7.86 * 10⁻¹

             = 5.89 dL

Thus the volume of the iron is 5.89 dL.

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A train travels at a speed of 24 m/s. Then it slows down uniformly at 0.065 m/s² until it stops the distance does the train travel while slowing down are 4430.75 m.

Distance measures length. For example, the gap of a street is how lengthy the street is. In the metric gadget of size, the maximum not unusualplace devices of distance are millimeters, centimeters, meters, and kilometers.

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Answer:

The average speed of the blood in the capillaries is 0.047 cm/s.

Note: The question is incomplete. The complete question is as follows:

The radius of the aorta is about 1 cm and the blood flowing through it has a speed of about 30 cm/s. Calculate the average speed of the blood in the capillaries given the total cross section of all the capillaries is about 2000 cm².

Explanation:

From the given values:

radius of the aorta, r₁ = 1 cm

speed of blood, v₁ = 30 cm/s

Area of the aorta, A₁ = πr₁² where π = 3.142

Area of aorta = 3.142 × (1)² = 3.142 cm²

Area of the capillaries, A₂ = 2000 cm²

let the average speed of the blood in the capillaries = v₂

From the continuity equation of fluid flow, the product of cross-sectional area of the pipe and the fluid speed at any point along the pipe is always constant. In formula, A₁v₁ = A₂v₂

Using the continuity equation, the average the average speed of the blood in the capillaries can be calculated thus:

A₁v₁ = A₂v₂

v₂ = (A₁v₁) / (A₂)

v₂ = (3.142 x 30) / (2000)

v₂ = 0.047 cm/s

Therefore, the average speed of the blood in the capillaries is 0.047 cm/s.

When the rheostat presents an obstacle of the same size as conductor B, the brightness of bulb A will be greater than the brightness of bulb C, because the resistance in the path of bulb C will increase, reducing the current flowing through it, while the resistance in the path of bulb A will remain unchanged.

Based on the information provided in the question, we can conclude that bulbs A and C are connected in parallel and have identical properties. The rheostat and conductor B are also identical in terms of their resistance. Initially, the brightness of bulb A will be greater than the brightness of bulb C, because conductor B provides a lower resistance path for current to flow, which means more current will flow through bulb C, causing bulb A to be less bright.

However, if the alligator clips are moved so that the rheostat presents an obstacle of the same size as conductor B, then the resistance of conductor B will be equal to the resistance of the rheostat. At the same time, the resistance in the path of bulb A will remain unchanged, which means that the current flowing through it will not be affected. Therefore, the brightness of bulb A will be greater than the brightness of bulb C when the rheostat presents an obstacle of the same size as conductor B.

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Answer:

Solid

Explanation:

Answer:

Solids.

Explanation:

Solid has a definite shape and volume.

Liquid, on the other hand, has a definite volume, but it does have an indefinite shape, meaning that it takes the shape of the container.

Answer:

i think its a load to move a object,

Explanation:

im taking this to and it isnt in the lesson

According to Newton's Second Law of Motion, if there is acceleration, there must be a net force acting on an object. This means that there must be an unbalanced force or a combination of forces that is causing the object to change its motion.

The magnitude and direction of the net force determine the rate of acceleration of the object. So, acceleration cannot occur without the presence of a net force.

To explain the relationship between acceleration and net force, we need to understand Newton's second law of motion.

Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically, it can be represented as:

Acceleration (a) = Net Force (F) / Mass (m)

If there is acceleration, it means that there must be a net force acting on the object. This is because, according to the formula, when net force (F) is zero, the acceleration (a) will also be zero. Therefore, for an object to accelerate, there must be a non-zero net force acting on it.

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Answer:

by collecting the sun's heat. Solar thermal power plants use heat from the sun to create steam, which can then be used to make electricity. On a smaller scale, solar panels that harness thermal energy can be used for heating water in homes, other buildings, and swimming pools.

Explanation:

The length of the third side of the triangular piece of land is approximately 125.7 m, and the angle between the first and third side is approximately 79.4° .

To find the length and orientation of the third side c, we can use the law of cosines, which states:

c² = a² + b² - 2ab cos(C)

where c is the length of the third side, a and b are the lengths of the first two sides, and C is the angle between sides a and b.

To find the angle C, we can use the law of sines, which states:

sin(C) / c = sin(A) / a = sin(B) / b

where A and B are the angles opposite sides a and b, respectively.

We can use the given measurements to calculate the values of a, b, and A:

a = 80.0 m

b = 105 m

To find angle A, we can use the law of cosines:

A = cos^-1[(b² + c² - a²) / (2bc)]

Since the angle between sides a and b is the same as the angle between sides b and c, we can use the same value for angle A and angle C. Therefore:

C = cos^-1[(a² + b² - c²) / (2ab)]

We can rearrange the law of sines to solve for c:

c = (a sin(C)) / sin(A)

Substituting the values we have calculated:

A = cos^-1[(105² + c² - 80²) / (2 x 105 x c)]

C = cos^-1[(80² + 105² - c²) / (2 x 80 x 105)]

c = (80 sin(C)) / sin(A)

Using a calculator, we get:

A ≈ 38.4°

C ≈ 79.4°

c ≈ 125.7 m

Therefore, the length of the third side and the angle between the first and third side is calulated to be 79.4° and  125.7 m (approx.)

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Answer:

12 m/s

Explanation:

Given data

Mass m= 1500kg

intitial velocity u= 20m/s

force F= 6000N

time t= 2 seconds

Required

The final velocity v

From

Ft= mΔv

Ft= m(u-v)

substitute

6000*2= 1500(20-v)

solve for v

12000= 30000- 1500v

collect like terms

12000-30000= -1500v

-18000= -1500v

divide both sides by  -1500v

v= 18000/1500

v=12 m/s

Hence the velccity is 12 m/s

The Ptolemaic model was a geocentric model of the Solar System developed by the ancient Greek astronomer, mathematician, and geographer Claudius Ptolemy.

According to this model, the Earth was at the center of the universe, and all the other celestial bodies revolved around it. Each planet in the Ptolemaic model was believed to move along a circular path called an "epicycle," which was centered on a point called the "deferent." The deferent, in turn, moved along a circular path around the Earth, called the "eccentric." The epicycle's center moved along the deferent at a constant rate, which gave the appearance of retrograde motion of the planet relative to the Earth. The Ptolemaic model was a complex and intricate system that required numerous epicycles, deferents, and eccentrics to explain the observed motions of the planets. While it was able to account for some of the observed planetary motions with reasonable accuracy, it had limitations and inaccuracies that became apparent as observations became more precise over time.

Here,

Eventually, the Ptolemaic model was replaced by the heliocentric model developed by Nicolaus Copernicus, which placed the Sun at the center of the Solar System and explained the observed motions of the planets more accurately.

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It take 1 hour 33 minute for all the ice to melt.

The heat or energy that is absorbed or released during a substance's phase change is known as latent heat. It might go from a solid to a liquid or from a liquid to a gas, or vice versa. Enthalpy, a characteristic of heat, is connected to latent heat.

Given parameters:

Mass of the ice: m=  0.6kg.

Heat enters though the insulator each second , H = 35.564J.

latent heat of fusion for ice: L =  3.335×10⁵ J/kg.

So, time taken for all the ice to melt = mL/H

=   0.6 × 3.335×10⁵/35.564 second

= 5626 second

= 1 hour 33 minute.

Hence,  It take 1 hour 33 minute for all the ice to melt.

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The heat required to melt all the ice is Q = 2204.49 kJ

Mass = Density * Volume and Volume = Area * Width

The area of the ice is 1.2m² and the width is 0.80cm

Then volume of ice = 1.2 m² * 0.008 m = 0.0096 m³

So there is a mass of ice on the windshield

Mass (m) = 917 kg/m³ * 0.0096 m³ = 0.9312kg

The heat that must be reached in order for ice to melt

Q sen is the sensible heat up to melting temperature (T m = 0°C , assuming pressure =1 atm as windshield is exposed to atmosphere)

Let Q lat be the latent heat of melting ice at its melting temperature

1) Q sen = m ice * c ice * ( T final - T initial) = 0.9312 kg * 2.108 kJ / Kg °C ( 0°C - (-7°C)) = 13.74 kJ

2) Q lat = m ice * L ice = (0.9312 kg * 335 kJ/kg ) = 311.952kJ

Thus Q sum = Q sen + Q lat = 13.74 kJ + 311.952 kJ = 325.692 kJ

This is the minimum amount of heat required, since we have not considered heat losses to the surroundings.

The specific heat of ice (c ice) is 2.108KJ/Kg°C and the latent heat of ice and snow (L ice) is 335KJ/Kg

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Answer:

This is because the distance between Deimos and Mars might be smaller.

Explanation:

Answer:

b

Explanation:

ibecause the wheels are sliding on the ground i think

Answer:

Both energies are equal when the rock has fallen 20 m or equivalently when it is at a height of 20 m.

Explanation:

Potential and Kinetic Energy

The gravitational potential energy is the energy an object has due to its height above the ground. The formula is

\(U=mgh\)

Where:

m = mass of the object

g = acceleration of gravity (9.8~m/s^2)

h = height

Note we can also use the object's weight W=mg into the formula:

\(U=Wh\)

The kinetic energy is the energy an object has due to its speed:

\(\displaystyle K=\frac{1}{2}mv^2\)

Where v is the object's speed.

Initially, the object has no kinetic energy because it's assumed at rest.

The W=30 N rock falls from a height of h=40 m, thus:

\(U=30*40=1,200 J\)

Since the sum of the kinetic and potential energies is constant:

U' + K' = 1,200 J

Here, U' and K' are the energies at any point of the motion. Since both must be the same:

U' = K' = 600 J

U'=Wh'=600

Solving for h':

\(\displaystyle h'=\frac{600}{W}=\frac{600}{30}=20~m\)

Both energies are equal when the rock has fallen 20 m or equivalently when it is at a height of 20 m.

Answer:

The effective mass at the 50 cm mark will be 1.5 kg because the meter stick is uniform and .5 kg can be considered to be acting at 50 cm

3 * (50 - x) = 1.5 * x

Balancing torques where x is the distance from the 50 cm mark

150 - 3 x = 1.5 x

x = 150 / 4.5 = 33.3

x would be at 50 - 33.3 = 16.7

Check:     3 * 16.7 = 1.5 * 33.3

50.1 = 50      within rounding