how do we measure or think of speed in the united states?

Answer:

1. A graph is defined as " A Diagram represents a system of connections or interrelations among two or more things by a number of different dots, lines etc".

2. In simple words "Graph is a representation of any object or a physical structure by dots, lines, etc.

Answer:

C. Blue stars

c

Explanation:

For stars in the main sequence, the absolute brightness tends to increase with decreasing surface temperature. Therefore, blue stars, which are hotter, tend to have higher absolute brightness compared to red stars, which are cooler. So, the correct answer is:

C. Blue stars

A star with an absolute brightness of -3 and a surface temperature around 20,000°C would likely be a main sequence star. Main sequence stars are characterized by their stable fusion of hydrogen into helium in their cores, and they cover a wide range of temperatures and absolute brightnesses. The combination of a relatively high absolute brightness and a high surface temperature suggests that this star is likely in the main sequence phase of its life cycle.

C. Blue stars

The speed of light Never goes to 0. A is wrong.

The speed of light in refraction does not remain constant. B is incorrect

Light does not repel. That term is reserved for something like magnetism. C is not using the correct vocabulary.

D is the right answer.

To find the acceleration of the skydiver, one needs to subtract the weight of the skydiver from the force of air resistance and divide that net force by the skydiver's mass. This results in an upward acceleration of 7.34 m/s².

In order to find the acceleration of the skydiver, we will apply Newton's Second Law, which states that the net force acting on an object is equal to its mass times its acceleration. This can be represented as F=ma. The net force is the difference between the gravitational force pulling the skydiver down and the air resistance force that acts upwards when she opens the parachute. The weight of the skydiver, which is a force, can be found using the equation F=mg where m is the mass and g is the acceleration due to gravity (approximated as 9.8 m/s²).

In this case, the weight of the skydiver is 70kg × 9.8 m/s² = 686 N. Since the force due to air resistance is greater (1200 N), this means there is a net upward force of 1200N - 686N = 514N. Given net force F=ma, the acceleration a of the skydiver is then F/m = 514N / 70kg = 7.34 m/s² upwards.

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recall and recognition

Answer:  Step Ladders

In general ladders are with inclined or vertical set of steps or rungs between two upright lengths of metal or wood. Ladders used for climbing up and down.

Step ladders :

It is a self supporting portable ladder, most commonly used in industries.  Self-supporting means it does not need any support to lean.  So this ladder can be used any where in the rooms. For example middle of the room  where support is not available. Also this ladder is non-adjustable flat steps and hinged back.  

Acceleration = (change in speed) / (time for the change)

Change in speed = (speed at the end) - (speed at the beginning).

Change in speed = (zero) - (50 m/s) = -50 m/s

Time for the change = 4 sec

Acceleration = (-50 m/s) / (4 sec)

Acceleration = -12.5 m/s²

The acceleration of an object which decelerates from an initial velocity of 50 m/s to a stop in 4 seconds is -12.5 m/s².

To calculate the acceleration of an object which comes to a stop from an initial velocity, we can use the following kinematic equation derived from Newton's laws of motion:

v_{f} = v_{i} + a times t

Where v_{f} is the final velocity, v_{i} is the initial velocity, a is the acceleration, and t is the time taken to come to a stop. We're given that the object had an initial velocity of 50 m/s and came to a stop (so v_{f} = 0 m/s) in 4 seconds. Plugging the values into the equation, we get:
0 = 50 + a times 4

To solve for a, we rearrange the equation to isolate a:
a = - (50 / 4)

The negative sign indicates that the acceleration is in the opposite direction of the initial velocity, which makes sense since the object is coming to a stop. Therefore, the acceleration is:
a = -12.5 m/s²

The object's acceleration is -12.5 m/s², which is in the negative direction, indicative of deceleration.

Answer:

Ohm

Explanation:

The devices that resists the flow of electric current are called resistors and they offer a resistance to the circuit.

1. Volt is the SI unit of voltage or potential difference

2. Coulomb is the SI unit of electric charge.

3. Ohm is the SI unit of resistance.

4. Watt is the SI unit of electric power.

5. Ampere is SI unit of electric current.

Hence, the unit to measure resistance of the circuit is ohm.

The unit of measure for resistance is (B), ohm (Ω). It is named after German physicist Georg Simon Ohm.

The ohm is defined as the resistance between two points in a conductor when a constant potential difference of one volt applied to these points produces a current of one ampere.

The following equation can be used to calculate resistance:

R = V/I

Where:

R = resistance in ohms

V = voltage in volts

I = current in amperes

For example, if a conductor has a resistance of 1 ohm and a voltage of 1 volt is applied to it, then the current through the conductor will be 1 ampere.

The ohm is a unit of the International System of Units (SI). It is one of the seven base units of the SI, and it is used to measure the opposition to the flow of electric current.

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That is a Wave Length.

Answer:

According to newton's first law of motion, friction is required to make an object slow down.

Explanation:

According to the Newton's first law of motion, for an object to change its velocity (either a change in the magnitude or the direction), there must be a cause to it which is defined as a net external force.

For example, an object which is sliding across a table or floor slows down due to the net force of friction that is acting on that object.

Causes of a severe storm are:

High winds

wildfires

hail

A severe thunderstorm includes winds of 58 MPH or greater

You are infected by the streptococcus bacterium.  You will suffer from a sore throat, as well as occasional rubus of the gastric musosa, unrtil you shake that thing.  Shake it now, baby !

the answer is ( bacteria)

A sore throat is a bacterial infection with a feeling of sore throat and fear. The sore throat is caused by only a small part of the sore throat.

The gravitational force an object exerts is influenced by its mass and distance. From the options, the moon exerts the most gravitational force because of its significant mass, despite being far away.

The factor that determines the gravitational force exerted by an object is both its mass and the distance from it. The equation for gravitational force is F = G * (m1 * m2) / r^2, where 'G' is the gravitational constant, 'm1' and 'm2' are the masses of the two objects, and 'r' is the distance between their centers.

In the options given: the remote control, the couch, TV actors, and the moon, despite the latter being far off, still, the moon exerts the strongest gravitational force on you. The magnitude of gravitational force exerted by the moon is larger due to its massive size compared to the rest, even though it's far away. The effect is noticeable in the ebb and flow of ocean tides caused by the moon's gravity.

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That is might thick wire. I'm not sure I've seen anything with 1/5 inch diameter.

The answer is A.

That is the exact diameter attributed to AWG 4 wire.

Answer: D (doubled)

According to ohm's law

                      I = V/R ,

                      V = IR ;   R = constant and V is doubled

  From the equation

                      V is directly proportional to the current, and it is given that R is constant ;

                    2V = 2I. R    since R = constant

                      Hence I is doubled.

I believe it's called a Scoop. This comes from my extencive knowledge and I ask my freind who writes articales. I could be wrong.

A piece of news published before a rival newspaper can publish it is called a Scoop.

In journalism, a scoop or monopoly is the very originality, importance, surprise, excitement, or secret news reported by a journalist or news agency in front of others. Scoops are important and can be of interest or concern to many people.

Scoop Independent News is New Zealand's oldest and largest independent online news company. Founded in 1999, we specialize in political and business news and claim to be the "beginning of news."

Scoops and examples. explanation. Exclusives or Scoop are news that only one reporter will cover as they are not available to anyone. It is the result of great journalism and is considered the reporter's "score." This term is often used in the media world. Here is an example of a scope:

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Chemical to Electrical

its electrical because it runs on a battery

A negative to a negative charge will make a neutral charge.

Answer:

Any combination of positive and negative charges that are in balance, as well as additional neutral charges.

Explanation:

A particle will have a neutral charge if and only if its components (subparticles) comprise an equal number of positive and negative charges, plus any number of neutral charges.

Compound machines have two or more simple machines

A simple machine that includes two or more simple machines working in unison is known as a compound machine.

A simple machine that consists of two or more simple machines working together is called a compound machine. This can take various forms, as many types of equipment and tools combine simple machines to achieve a specific function, thereby reducing the effort needed to perform a task. Examples of compound machines include bicycles, scissors, and wheelbarrows, all of which harness the principles of leverage, inclined planes, and wheels and axles to operate.

Each component in a compound machine plays a role in transforming or transferring energy from one part to another, simplifying the movement or lifting of loads. For instance, scissors combine levers (the handles) and wedges (the blades) to multiply the force applied by the user to cut through materials.

Answer:

1385 N/m^2

Explanation:

The pressure exerted by the brick on the ground is given by:

[tex]p=\frac{F}{A}[/tex]

where F is the weight of the brick and A is the area of its largest face.

The area of the largest face is given by the two largest sides of the brick, therefore:

[tex]A=(0.19 m)(0.095 m)=0.01805 m^2[/tex]

The force exerted by the brick is the weight:

[tex]F=25 N[/tex]

So, the pressure is

[tex]p=\frac{25 N}{0.01805 m^2}=1385 N/m^2[/tex]

The pressure exerted by the brick when resting on its largest face is calculated by dividing the weight of the brick (25 N) by the area of the largest face (0.01805 [tex]m^2[/tex]), resulting in a pressure of 1385 [tex]N/m^2[/tex].

The question seeks to calculate the pressure exerted by a brick on the ground when it is resting on its largest face. To find the pressure, we use the formula Pressure (P) = Force (F) / Area (A). Here, the force is the weight of the brick, which is given as 25 N.

Since pressure is force per unit area, we need to identify the area of the largest face of the brick. The dimensions of the brick are 0.19 m, 0.07 m, and 0.095 m. The largest face would be the one formed by the sides measuring 0.19 m and 0.095 m. Thus, the area is A = 0.19 m × 0.095 m = 0.01805 [tex]m^2[/tex].

To calculate the pressure, we divide the force (weight) by the area:

P = F / A = 25 N / 0.01805 m2 = 1385 [tex]N/m^2[/tex]

Therefore, the pressure exerted on the ground by the brick resting on its largest face is 1385 [tex]N/m^2[/tex].

Answer:

1). Current is measured in amps and is represented by the symbol "Δ" The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.

2). Current is the flow of electrons through a circuit.

Explanation:

1). Current is measured in amps and is represented by the symbol "Δ" The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.

As per Ohm's law we know that

[tex]V = I R[/tex]

here we have

V = voltage difference across the resistor

R = resistance of the conductor

2). Current is the flow of electrons through a circuit.

Rate of flow of charge is known as electric current

It is given as

[tex]I = \frac{dq}{dt}[/tex]

[tex]I = e\frac{dN}{dt}[/tex]

Current is the flow of electrons through a circuit. Ohm's Law is mathematically represented by the equation V=I/R When solving for Resistance in a current and both voltage and current are known values, the equation to solve reads I =V*R If the voltage in a circuit is increased, the current will also increase. Correct options are 2 and 3.

1. **Current is measured in amps and is represented by the symbol "Δ". The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.**

  - Current is indeed measured in amperes (amps) and is represented by the symbol "I," not "Δ." The statement correctly mentions Ohm's Law, which relates current (I), voltage (V), and resistance (R). However, the symbol "Δ" is not used to represent current.

2. **Current is the flow of electrons through a circuit.**

  - This statement is true. Current is the flow of electric charge, typically carried by electrons, through a circuit. Electrons move from the negative terminal to the positive terminal of a voltage source.

3. **Ohm's Law is mathematically represented by the equation V=I/R. When solving for Resistance in a circuit and both voltage and current are known values, the equation to solve reads I = V * R. If the voltage in a circuit is increased, the current will also increase.**

  - Ohm's Law is correctly represented by the equation V=I/R. When solving for resistance (R), the equation is R=V/I. However, the last part of the statement is not necessarily true. According to Ohm's Law, if voltage (V) increases, and resistance (R) remains constant, then the current (I) will also increase. But if resistance increases along with voltage, the current may not necessarily increase.

So, the true statements are:

- Statement 2: Current is the flow of electrons through a circuit.

- Statement 3: Ohm's Law is mathematically represented by the equation V=I/R. When solving for resistance in a circuit, and both voltage and current are known values, the equation to solve reads R=V/I. If the voltage in a circuit is increased, and resistance remains constant, the current will also increase.

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Complete question is:

Choose all of the true statements regarding the relationship between voltage, resistance, and current.

1. Current is measured in amps and is represented by the symbol "Δ" The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.

2. Current is the flow of electrons through a circuit.

3. Ohm's Law is mathematically represented by the equation V=I/R When solving for Resistance in a current and both voltage and current are known values, the equation to solve reads I =V*R If the voltage in a circuit is increased, the current will also increase.

Answer:

Water Table

Explanation:

first there is the soil moisture then there is the unsaturated zone then there is the water table so the answer is water table

Answer:

Water Table

Explanation:

Shawn's kinetic energy is calculated using the kinetic energy formula KE =  rac{1}{2}mv^2. With a mass of 45.0 kg and a plausible velocity of 3 m/s, the kinetic energy is 202.5 Joules.

The subject of this question is Physics, as it involves calculating the kinetic energy of a moving object. To find Shawn's kinetic energy as he rides his bike, we use the kinetic energy formula KE =  {1}{2}mv^2, where m is mass and v is velocity.

Firstly, there seems to be an inconsistency in the given information. The velocity mentioned is 70 m/s, but it also states that Shawn rides his bike 1800m in 10.0 minutes. Since 1800 meters in 600 seconds constitutes a velocity of 3 m/s, we will proceed with the more plausible velocity value of 3 m/s.

Therefore, Shawn's kinetic energy can be calculated as follows:

KE =  {1}{2} * 45.6 { kg} * (3 { m/s})^2 = 202.5{ J}

Consequently, Shawn's kinetic energy is 202.5 Joules.

the Answer is D......

Answer:

C.The car appears to be moving 30 km/hr in the opposite direction of the bus.

Explanation:

There are two reference systems involved in this situation:

- Reference system S: this is the reference system where velocities are measured with respect to the ground. In this reference system, the car is parked, so its velocity is [tex]v=0[/tex]

- Reference system S': this is the reference system moving with the bus. This reference system is moving with a velocity of [tex]v_0 = +30 km/h[/tex] with respect to the reference system S

Calling [tex]v'[/tex] the velocity of the car in the reference system S', we have:

[tex]v=v_0 +v'[/tex]

From which

[tex]v'=v-v_0 = 0-(+30 km/h)=-30 km/h[/tex]

and the negative sign means that a passanger in the bus observes the car moving in the opposite direction.

The process primarily responsible for noodle motion, especially in this scenario, is convection.

In any fluid undergoing uneven heating or cooling, a circulation pattern develops where warmer portions of the fluid rise and cooler portions sink.

(20 N)/(2 m²) = (20/2) N/m² = 10 Pa

_____

The pascal (Pa) is the derived SI unit of pressure equal to 1 N/m².

The formula used to find an object's acceleration is: Acceleration (a) = Change in velocity (Δv) / Time taken (Δt)

In this formula, acceleration is measured in meters per second squared (m/s²), the change in velocity is measured in meters per second (m/s), and the time taken is measured in seconds (s). This formula represents the rate at which an object's velocity changes over time, and it quantifies how quickly the object is speeding up or slowing down.

The SI unit for acceleration is meters per second squared (m/s²). This means that for every second that passes, the velocity of the object changes by the value of the acceleration. For example, if an object has an acceleration of 5 m/s², it means its velocity is increasing or decreasing by 5 meters per second every second.

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The answer is D. Fishing

Answer:

D

Explanation: