An emt asks you how he can decrease the chances of being involved in a collision when driving with lights and siren at night. Your advice would be:__________

In ohms, the resistance of the unknown resistor is 6.19 amps.

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Therefore in ohm's law, V = IR

V = voltage

I = current

R = resistance

To calculate the resistance, we have

R = V/I

where Voltage = 29.7

Current , I = 4.8

Resistance= 29.7/ 4.8 = 6.19 amps

In conclusion, Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.

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A change in temperature frequently causes substances to change phases. Most substances are solid at low temperatures; as the temperature rises, they become liquid; and at still greater temperatures, they become gaseous.

Melting is the conversion of a solid into a liquid (an older term that you may see sometimes is fusion). Solidification is the process where a liquid turns into a solid. The melting point, or the temperature at which a pure substance begins to melt, is a property of that substance. A solid must expend energy to become a liquid. A specific quantity of energy is required by every pure substance in order to transform from a solid to a liquid. This amount is known as the substance's enthalpy of fusion (or heat of fusion).

The complete question is- The diagram shows how states of matter can change when energy is either added or removed.

System before change

System after change

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00000

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00000

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All of these statements below are true EXCEPT

Energy was added to the matter causing the particle movement to increase.

The matter changed states which is a physical change.

The particles in the matter before the change had more energy than after the change.

The particles in the matter before the change had less energy than after the change.

the diagram is attached below.

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Answer:

density ρ = mass / volume

ρ = 100 g / 11.2 cm^3 = 8.93 g/cm^3

Probably copper because a value given for Cu is 8.89 g/cm^3

latent heat, also called the heat of vaporization, is the amount of energy necessary to change a liquid to a vapour at constant temperature and pressure.Apr 6, 2021

Answer:

i am doing this rn

Explanation:

COMMENTS

\( \large{ \boxed{ \tt{447.3 \: m}}}\)

-Please see the attached picture for full solution!:)

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Kinetic energy is the energy that an object possesses due to its motion. Hence, the correct option is [109.5 J].

The formula to calculate kinetic energy is KE = 1/2 mv², where m is the mass of the object and v is its velocity or speed. In this question, the wagon wheel is a ring of mass 77.1 kg and radius 0.630 m. The wagon is moving at 1.22 m/s. We have to calculate the total kinetic energy of the wheel.The velocity of the wagon can be converted into the angular velocity of the wheel by using the formula v = wr. The angular velocity w is calculated as:w = v/rw = 1.22 m/s ÷ 0.630 m ≈ 1.936 rad/sNow that we know the angular velocity of the wheel, we can calculate its total kinetic energy using the formula KE = 1/2 Iw², where I is the moment of inertia of the wheel. For a ring-shaped object, the moment of inertia is given by I = mr².KE = 1/2 Iw²KE = 1/2 (mr²) (w²)KE = 1/2 (77.1 kg) (0.630 m)² (1.936 rad/s)²KE ≈ 109.5 J. Therefore, the total kinetic energy of the wagon wheel is approximately 109.5 J. Note: As per the question, the total kinetic energy of the wheel is required, not of the wagon.

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The gravitational potential energy of an object depends on its mass, height, and the strength of the gravitational field.

The formula for gravitational potential energy is:

PE = mgh.  

A gravitational field is a region in space around an object where the force of gravity is felt. All objects with mass have a gravitational field, and the strength of the gravitational field depends on the mass of the object and the distance from the object. The concept of a gravitational field was first introduced by Isaac Newton, who developed the law of universal gravitation. According to this law, the force of gravity between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them.  

The gravitational field is the vector quantity that describes the direction and strength of the force of gravity at any point in space. The gravitational field is a fundamental concept in physics and has many important applications, including in celestial mechanics, where it is used to describe the motion of planets and other celestial objects. The study of gravitational fields has also led to many important discoveries in cosmology, including the existence of black holes and the large-scale structure of the universe.

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Answer:

Using V= IR

I= 0.2307 Ampere

looking at the graph,

1) Displacement includes direction

Displacement from 8s to 16s = 15 - 6 = 9

Displacement fbetween 16s and 24s = 0 - 15 = - 15

Displacemet between 8s and 24s = 9 - 15

Displacemet between 8s and 24s = - 6m

2)

Distance does not include direction

from 8s to 16s,

distance travelled = 15 - 6 = 9 m

From 16s to 24s,

distance travelled = 15 - 0 = 15

Total distance between 8s and 24s = 9 + 15

Total distance between 8s and 24s = 24 m

Answer: D. It shows Newton's first law of motion, which states that an object tends to stay in motion unless an outside force acts upon it.

Explanation:

Newton's first law of motion states that an object tends to stay in motion unless an outside force acts upon it.

Answer:

he is right it’s D

Explanation:

if u could not read his hand writing

Fluid viscosity is the property of the fluid that is responsible for the development of the velocity boundary layer. Non-viscous fluids do  not exhibit the property of velocity boundary layer in a pipe.

What is fluid viscosity?

Thickness of a fluid is called its viscosity. In liquids, velocity boundary layer is formed due to viscosity.

Viscosity is also termed as the flow rate of a liquid. If a liquid has a high flow rate then its viscosity is low and vice versa.

The fluid viscosity can be measured by using viscometer. The formula to measure viscosity is F = μA. u/y

Here F is force,  μ is fluid viscosity, A is the area and u/y sheer deformation rate.

On the contrary, a non-viscous fluid is one that has less thickness and can flow easily.

For example, water is a non-viscous fluid.

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Lamarck's theory of evolution, also known as Lamarckism, proposed two main ideas. Firstly, the theory of use and disuse suggests that organs or traits that are used more frequently become stronger and more developed, while those that are not used gradually deteriorate over generations. Secondly, the theory of inheritance of acquired characteristics states that an organism can pass on traits acquired during its lifetime to its offspring.

Under Lamarck's theory, an organism might evolve by developing or strengthening certain traits through use and passing them on to the next generation. For example, if a giraffe stretches its neck to reach leaves high in the trees, its offspring would inherit a longer neck. This gradual elongation of the neck would continue over generations.

In contrast, under Darwin's theory of natural selection, an organism might evolve through the process of adaptation to its environment. For instance, consider a bird population with varying beak sizes. If the available food source consists of small seeds, individuals with smaller beaks are more likely to survive and reproduce, passing on their genes for smaller beaks. Over time, the average beak size in the population would decrease due to the selective advantage of smaller beaks in obtaining food.

In summary, Lamarck's theory proposed that acquired traits can be inherited, leading to gradual changes in an organism's characteristics. Darwin's theory, on the other hand, emphasized the role of natural selection in the adaptation of organisms to their environment, resulting in the accumulation of advantageous traits over generations.

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Answer:

a skydiver falling at terminal (constant) velocity

Explanation:

The mass of carbon monoxide present in the room is approximately 0.067 grams.

To calculate the mass of carbon monoxide in the room, we need to convert the volume of the room from cubic feet (ft^3) to cubic meters (m^3) and then multiply it by the concentration of carbon monoxide.

Given:

Concentration of carbon monoxide = 48 micrograms/m^3

Room dimensions: 10.6 ft x 14.8 ft x 20.5 ft

First, we convert the room volume from cubic feet to cubic meters:

Volume = (10.6 ft) * (14.8 ft) * (20.5 ft) = 3201.16 ft^3

1 ft^3 is approximately equal to 0.02832 m^3. So, converting the volume:

Volume = 3201.16 ft^3 * 0.02832 m^3/ft^3 ≈ 90.71 m^3

Next, we calculate the mass of carbon monoxide:

Mass = Concentration * Volume

Mass = 48 micrograms/m^3 * 90.71 m^3

Converting micrograms to grams:

Mass = (48 micrograms/m^3 * 90.71 m^3) / (10^6 micrograms/gram) ≈ 0.00436 grams

Rounding to three significant figures, the mass of carbon monoxide present in the room is approximately 0.067 grams.

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A pitcher throws a curveball, the ball is given a fairly rapid spin. This spin is created by the pitcher's grip and release, which imparts a rotational force on the ball. The amount of kinetic energy that is converted into rotational energy depends on the pitcher's technique and the velocity of the ball.

In terms of the physics of the curveball, the ball's kinetic energy is divided into two components: translational energy, which is the energy of motion in a straight line, and rotational energy, which is the energy of rotation around an axis. The amount of rotational energy depends on the angular velocity of the ball, which is determined by the spin rate and the mass of the ball.

Research has shown that the majority of a curveball's kinetic energy is converted into rotational energy, with only a small amount remaining as translational energy. This makes the curveball a challenging pitch for batters to hit, as the ball's movement is difficult to predict due to the combination of its rotational and translational energy.

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If the resistor in a simple circuit is replaced with another resistor that has 75% lower conductivity, the current (I) in the circuit would decrease.

In a simple circuit, the current flowing through a metallic resistor is determined by Ohm's Law, which states that the current (I) is directly proportional to the voltage (V) applied across the resistor and inversely proportional to the resistance (R) of the resistor (I = V/R).

When the resistor is replaced with another resistor that has 75% lower conductivity, it means that the new resistor has a higher resistance compared to the original resistor. Since resistance is in the denominator of the current equation, an increase in resistance leads to a decrease in current.

Therefore, the current (I) in the circuit would decrease when the resistor with lower conductivity is introduced. This relationship between resistance and current is consistent with Ohm's Law, which establishes the fundamental relationship between voltage, current, and resistance in a circuit.

By manipulating the resistance value, the current flowing through the circuit can be controlled.

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U generated less power between the 2 trials.

Comment if you need explaination

The internal resistance of an automobile battery was found to be 2.2Ω

Explain about resistance ?

Resistance is a measure of an electrical circuit's resistance to current flow. Resistance is measured in ohms, which is represented by the Greek letter omega (Ω). Ohms are named after German scientist Georg Simon Ohm (1784-1854), who researched the link between voltage, current, and resistance. He is credited for developing Ohm's Law.

Electrical resistance is a barrier to current flow in a circuit.

While driving to a particular spot with your family, you may have noticed that when your driver encounters an impediment on the road, he slows down the automobile.

v=25.0v

emf=8.5v

current=7.5

Vint=16.5v

v=IRint

16.5=7.5(Rint)

=2.2 Ω

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Answer:

harder daddy

Explanation:

Answer:

I don't know how it works, but I found this on the internet. image does not belong to me.

hope it helps!

Answer:

X-RAY

Explanation:

I took the test on study island

The broken pieces of the plates overlie a ductile layer known as asthenosphere.

Plate tectonics is a scientific hypothesis that explains the movement of Earth's lithosphere. Plate tectonics also explains the formation of mountains, volcanoes, and the occurrence of earthquakes. The Earth's lithosphere is composed of the Earth's crust, both continental and oceanic, and the uppermost part of the mantle. The lithosphere is divided into several plates that fit together like a puzzle. These plates are in constant motion, driven by the motion of molten rock in the Earth's mantle.

The plate boundaries can interact with one another in various ways. Divergent plate boundaries are where new lithosphere is created as the plates move apart. At convergent plate boundaries, one plate is forced beneath another. Transform plate boundaries are where plates slide past each other in a sideways movement.

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Answer: Depth does not classify soils. Soil color and other properties including texture, structure, and consistence are used to distinguish and identify soil layers.

Happy to help! (0.<)

Explanation:

The depth parameter is  does not used to classify the soil in different region. Texture, color and structure are used to characterize the soil type.

The method of classifying soil involves dividing it into groups where the behaviors of the soils within each group are the same under a certain set of physical conditions.

Engineers can use soil classification to comprehend and evaluate a particular soil's performance and determine whether the soil is suitable for particular engineering applications.

The classification of soli include  based on grain size textural classification,  AASHTO classification system,  Unified soil classification system. AASHTO classification system is developed by  Bureau of Public Roads for the classification of soil for the highway subgrade use.

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Total angular velocity is 13.7 rad/s.

Given that an object is moving in a circular motion, we can infer that the system involving the athlete, the ball, and the rope is also moving in a round fashion.

We are informed that the athlete is 181 cm tall, has a 90 cm arm span, and will be using a 121 cm long ball and chain for the competition. With both arms hanging on to the ball and chain handle as the athlete starts to spin, their body becomes the centre of the action. The ball and chain's initial linear velocity is 29 m/s when it is released.

The radius of the path= 90 cm + 121 cm

                                    = 211cm or 2.11 m

Using;
linear velocity = radius * angular velocity

V = rω

ω = V/r

ω =  29m/s/2.11 m

ω = 13.7 rad/s

angular velocity of athlete is 13.7 rad/s

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The pressure exerted by the water at the bottom of the well is 170000 Pa.

We can use the formula for pressure due to a liquid:

pressure = density × gravity × height

where;

Assuming the density of water is 1000 kg/m³ and the acceleration due to gravity is 9.81 m/s², we can calculate the pressure at the bottom of the well as:

pressure = 1000 kg/m³ × 9.81 m/s² × 17 m

pressure = 166970 Pa

Rounding off to two significant figures, the pressure exerted by the water at the bottom of the well is 170000 Pa.

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Answer:

To lose weight, you must use more weight than you consume. (D.)

Explanation:

I took the test and got a 100