(a) First consider the horse as the system of interest. In the initial state the horse is already moving at speed . In the final state the horse is at the top of the hill, still moving at speed . Write out the Energy Principle for the system of the horse alone. The terms on the left hand side should include only energy changes for the system, while the terms on the right hand side should relate to the surroundings (everything else).

Answer:

Halos, blurriness, and night blindness causes night vision (symptoms) while vitamin-A,corrective lenses, such as eyeglasses or contacts, can improve or help night vision.

Explanation:

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Answer:

-1.02 m/s²

Explanation:

The average acceleration of the train while stopping can be calculated using the formula: acceleration = (final velocity - initial velocity) / time. The initial velocity of the train is 22.9 km/h, which is equivalent to 6.36 m/s. The final velocity is 0 m/s since the train comes to a stop. The time taken to stop is 6.24 s. Plugging these values into the formula, we get: acceleration = (0 - 6.36) / 6.24 = -1.02 m/s².

So, the average acceleration of the train while stopping is -1.02 m/s².

Answer:

539 N

Explanation:

The force of gravity (also known as weight) on an object can be calculated using the formula:

F = m * g

where F is the force of gravity, m is the mass of the object, and g is the acceleration due to gravity.

For a 55 kg person on the surface of the earth, the acceleration due to gravity is approximately 9.8 m/s^2. Therefore, the force of gravity can be calculated as:

F = 55 kg * 9.8 m/s^2 = 539 N

So, the force of gravity on a 55 kg person on the surface of the earth is approximately 539 N.

The kinetic energy of the car is 300,000J

Kinetic energy is the energy of motion.

The formula for kinetic energy is given as \(K.E = \frac{1}{2} mv^{2}\)

where m = mass of object , v = speed of object.

An object having some speed and mass will have kinetic energy while an object at rest will not have any kinetic energy since the speed of object at rest is zero.

Since at rest speed is zero, an object has kinetic energy only when it is in motion.

From the question,

m = 1,500kg

v = 20m/s

K.E = (1/2) x 1,500 x 20 x 20

K. E = 300,000J

The car now possess a kinetic energy of 300,000J

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Answer:

it's B

Explanation:

Elastic potential energy is energy stored as a result of applying a force to deform an elastic objects. The energy is stored until the force is removed and the object springs back to it's original shape, doing work in the process. The deformation could involve compressing, stretching or twisting the object

Answer: Elastic energy

Explanation:

A PE X

Answer:c. 2.1°C

Explanation:

I just did it

A nurse caring for a client who is requesting to go to the bathroom immediately after an uncomplicated vaginal birth should take the following appropriate action.

1. Assess the client's condition: The nurse should assess the client's vital signs, level of pain, and any signs of complications before allowing the client to go to the bathroom.

2. Ensure client safety: The nurse should provide assistance to the client in getting out of bed and moving to the bathroom, ensuring their safety during the process.

3. Provide privacy and dignity: The nurse should respect the client's privacy by ensuring that the bathroom door is closed and that there are no unnecessary interruptions during their time in the bathroom.

4. Offer a bedpan or commode chair: If the client is unable to walk to the bathroom, the nurse should offer a bedpan or a commode chair as an alternative option for voiding.

5. Monitor the client: After the client has used the bathroom, the nurse should monitor them for any signs of distress or complications, such as excessive bleeding or changes in vital signs.

For more detailed and specific guidance, the nurse should follow the hospital's policies and procedures regarding postpartum care after a vaginal birth.

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Answer:

i would have to say B makes the most sense

Explanation:

The geothermal gradient in the tectonically stable region is approximately 21°C/km, indicating that the temperature increases by an average of 21 degrees Celsius per kilometer of depth.

To calculate the geothermal gradient, we need to find the rate at which the temperature increases with depth.

Temperature at the surface (T₁) = 14°C

Temperature at a depth of 5.0 km (T₂) = 119°C

Temperature difference = T₂ - T₁ = 119°C - 14°C = 105°C

Depth difference = 5.0 km - 0 km = 5.0 km

Geothermal gradient = Temperature difference / Depth difference

Geothermal gradient = 105°C / 5.0 km

Calculating this expression, we find:

Geothermal gradient ≈ 21°C/km

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Answer:

40 J

Explanation:

W = (f)(d)

W = (20)(2)

W = 40 J

If a constant 20 N force is applied to a 7 kg box to push it along the ground , then the work is done by this force if the box moves 2 meters would be 40 Newton meters.

The total amount of energy transferred when a force is applied to move an object through some distance .

As given in the problem if a constant 20 N force is applied to a 7 kg box to push it along the ground, then we have to find out the work is done by this force if the box moves 2 meters ,

The work done by the force to push the box = 20 × 2

                                                                          =40 Newton meters

Thus,  the work is done by this force if the box moves 2 meters would be 40 Newton meters.              

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In Activity 1-1, we will make a variety of observations to determine whether like or unlike charges attract each other. We will start by observing the behavior of objects with the same charge,

such as two positively charged balloons or two negatively charged balloons. If they repel each other, we can conclude that like charges repel. Similarly,

we will observe the behavior of objects with opposite charges, such as a positively charged balloon and a negatively charged balloon. If they attract each other, we can conclude that unlike charges attract.

We will also test these observations by changing the charges of the objects, such as by rubbing a balloon on a sweater to give it a charge. Through these observations, we will be able to determine the behavior of like and unlike charges and how they interact with each other.

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Answer:

-2.4 m/s²

Explanation:

avg accel = Δv/Δt

v-i = 30 m/s

v-f = (30 m/s)(0.60) = 18 m/s

Δt = 5.0 sec

avg accel = (18 m/s - 30 m/s) / 5.0 s = (- 12 m/s) / 5 s = -2.4 m/s²

negative sign means it's slowing down

Answer:

A cell is the basic block of life and is always changing to fit its environment.

Explanation:

A cell is the basic founding block of a living organisms. In other words, a cell is the basic membrane  unit which contains fundamental molecules of life. It is the cell that all living things are composed of.

The cell always changes with the surroundings and environment and it adapts to it. The cells requires a constant adjustments as the conditions inside and the outside the cells changes to keep a stable internal environment. Because the environment internally and externally is always changing, the cell continuously make adjustments to stay at or the near the set point.

Answer: Force = mass x acceleration

Explanation: Here, the plane is standing still so acceleration here is

acceleration due to gravity ( 9.8 m/\(s^{2}\))  So,

 Force = mass x 9.8

 230000 = mass x 9.8

 Mass = \(\frac{230000}{9.8}\) = 23,469.39 kgs

Here force is negative because it is acting against gravity. Also, since the unit of force is Newton so the unit of mass is in kgs

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For the gopher tortoise population to survive over the long run, efforts need also be done to address the underlying causes of habitat loss and fragmentation.

A species of organism's habitat is its natural environment, where it may survive and flourish. It encompasses every element physical, biological, and environmental necessary for the existence and procreation of that species. Examples include food, water, shelter, and space. From a small woodland patch to an entire biome or ecosystem, habitats can range greatly in size.

Wild tortoises could be moved to zoos or aquariums with greater regulations safeguarding them. This would aid in preventing future deterioration, fragmentation, and loss of the habitat for the tortoises as a result of human activity. Protecting the tortoises and their burrows would be easier to enforce under conservatory rules. Relocating tortoises, however, should only be done when absolutely required and with prudence because it can spread illness and is just a temporary fix. For the gopher tortoise population to survive over the long run, efforts need also be done to address the underlying causes of habitat loss and fragmentation.

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If you double the current through a resistor, the power dissipated by the resistor change by factor of 4.

The stream of positive charges which flow from the positive terminal to the negative terminal of the battery attached in a circuit.

Power dissipated through a resistor is related to current as

P  =I²R

When the current is doubled, the new power will be

P' = (2I)²R

P' = 4 I²R

P' = 4P

Thus, the power change by the factor of 4.

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The resistance of the coil is 223.8 Ω.

To determine the resistance of a coil if its impedance is 255 ωω and its reactance is 115 ωω, we can use the formula:

\(Impedance^2 = Resistance^2 + Reactance^2\)

Substituting the given values, we get:

255^2 = R^2 + 115^2

Solving for R, we get:

\(R = √(255^2 - 115^2)\)

R = 223.8 Ω (rounded to one decimal place)

Therefore, the resistance of the coil is 223.8 Ω.

Note: Resistance is the real part of impedance and is measured in ohms (Ω).

Impedance is the combination of resistance and reactance and is also measured in ohms (Ω).

Reactance is the imaginary part of impedance and is measured in ohms (Ω).

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The angular velocity of the coil is 125 radians/s.

We can use the following formula to find the angular velocity:

ε = NBAω

where

N = number of turns in the coil

B = magnetic field strength

A = area of the coil

ω = angular velocity

Let's rearrange the formula to get the value of ω.

ω = ε / NBA

The area of the coil can be calculated as:

A = l²

where l is the length of the side of the square coil.

The given length of the side of the coil is 15.0 cm. Converting it to meters, we get:

l = 0.15 m

Therefore,

A = (0.15 m)²

= 0.0225 m²

Now, let's substitute the values in the formula to get the value of ω.

ω = ε / NBA

= (30.0 × 10⁻³ V) / [(20)(0.050 T)(0.0225 m²)]

= 125 radians/s

Therefore, the angular velocity of the coil is 125 radians/s.

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The total impulse received by the body is approximately 42.43 Ns.

Impulse is a measure of the change in momentum of an object resulting from a force acting upon it for a period of time. It is defined as the product of the force and the time interval over which it acts, and is represented by the symbol "J".

To find the total impulse received by the body, we need to use vector addition to add the two impulses together. Since the impulses are at an angle of 55 degrees to each other, we can use the law of cosines to find the magnitude of the resultant impulse:

I² = 24² + 35² - 2(24)(35)cos(55)

I² = 576 + 1225 - 1680cos(55)

I² = 1801.9

I ≈ 42.43 Ns

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To make real ice cream, the ice cream must contain a minimum of 10% milk fat.

Ice cream is a delicious and popular dessert enjoyed by people all over the world. It is made by mixing cream, sugar, and other ingredients and then freezing the mixture until it becomes thick and creamy. Ice cream is defined as a frozen food product that is made from a mixture of milk, cream, sugar, and flavorings.

It must contain at least 10% milk fat to be considered real ice cream. The milk fat is what gives ice cream its creamy texture and rich flavor. Milk fat is an essential ingredient in ice cream because it gives it the smooth, creamy texture that people love. Without enough milk fat, the ice cream will be thin, icy, and not as flavorful.

Milk fat is a key ingredient in ice cream and is what gives it its signature taste and texture. Most ice cream makers use a combination of milk and cream to achieve the desired milk fat content. Some ice cream makers also add other ingredients like eggs or stabilizers to help improve the texture and consistency of the ice cream.

Ice cream is a popular dessert that has been enjoyed for centuries. By following the proper recipe and using high-quality ingredients like milk fat, you can make delicious and creamy ice cream at home.

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C. The magnitude of the acceleration of a planet in an orbit around the sun is proportional to the reciprocal of the distance between the planet and the sun.

The reciprocal of the distance between the planet and the sun ,This is known as Kepler's third law. The farther a planet is from the sun, the weaker the gravitational force between them and the slower the planet's acceleration.
The magnitude of the acceleration of a planet in an orbit around the sun is proportional to: C. The reciprocal of the distance between the planet and the sun.

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Substitute the given value in equation (3) to find the fraction of total kinetic energy (TKE) of the car due to rotation of the wheel. So, the fraction is 152 .

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

Kinetic energy is created when potential energy is released, triggered into motion by gravity or chemical reactions, among other catalysts. This results in a potential energy decrease and kinetic energy increase.

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At first quarter, it is approximately 1 week until the new moon.

What is the first quarter? The first quarter is the phase of the moon that occurs after the waxing crescent phase and before the waxing gibbous phase. The first quarter phase is seen when the Moon has completed 50% of its orbit around the Earth, which is seven days after the new moon phase.

In general, the lunar cycle is divided into 8 stages: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, and Waning Crescent. A new moon is the initial phase of the moon, when it appears completely black and there is no light coming from it.

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Answer:

In terms of the light spectrum, blue is a primary color, which means that it is one of the base colors that exist in the universe and it cannot be created by combining different colors together. The primary pigment colors are cyan, magenta, and yellow. Cyan absorbs red, yellow absorbs blue, and magenta absorbs green.

Explanation:

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The volume of the cylinder is 1.57 x 10⁻³ m³.

V = πr²h

V = π(5cm)²(20cm)(1m/100cm)³

V = 1.57 x 10⁻³ m³

The mass of the cylinder is 12.25 kg.

ρ =  m/v

m = ρv

m = (7800 kg/m³)(1.57 x 10⁻³ m³)

m = 12.25 kg

A line from second to home creates a right triangle with 45 degree angles.

This makes the diagonal line the side length of the square multiplied by the sqrt(2)

Second to home = 90sqrt(2) = 127.279 feet ( round answer as needed)

Answer: max density = 2.65 g/cm3

min density = 2.45 g/cm3

Explanation:

max density = 2.55 + 0.10 = 2.65 g/cm3

min density = 2.55 - 0.10 = 2.45 g/cm3

Maximum density = 2.65  g/cm³.

Minimum density =  2.45  g/cm³.

The density of a substance reveals how dense it is in a certain space. The definition of density is the mass of a substance per unit volume. The degree to which matter is packed together is fundamentally measured by density. It is a specific physical quality of a specific object.

The student determined the density of the rock to be 2.55 ± 0.10 g/cm³.

So, Maximum density of the rock = 2.55 + 0.10 g/cm³ = 2.65  g/cm³.

Minimum density of the rock = 2.55 - 0.10 g/cm³ = 2.45  g/cm³.

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Answer:

2450 J

Explanation:

Given that,

A 50Kg girl jumps off a 5-meter-high diving board.

We need to find the kinetic energy of the girl before she hits the water. At this point the kinetic energy becomes equal to the potential energy such that,

\(K=mgh\\\\K=50\times 9.8\times 5\\\\K=2450\ J\)

So, her kinetic energy right before she hits the water is equal to 2450 J.

-- impurities in the water

-- air pressure is higher than standard

We are given the following information about an inelastic collision.

Mass of 1st object = 4 kg

Mass of 2nd object = 10 kg

Initial velocity of 1st object = 25 m/s

Final velocity of both objects = 14 m/s

Initial velocity of 2nd object = ?

In an inelastic collision, the momentum is conserved but the kinetic energy is not conserved.

Recall that the total momentum is conserved and given by

Let us substitute the given values and solve for initial velocity of the body (u2)

Therefore, the initial velocity of the body of mass 10 kg is 9.6 m/s