a 10,000 n vehicle is stalled one-quarter the way across a bridge. calculate the additional reaction forces that are supplied at the supports on both ends of the bridge.

The acceleration of the box is 0.025 m/s²

We'll begin by calculating the the frictional force

Coefficient of kinetic friction (μ) = 0.21

Mass (m) = 8 Kg

Acceleration due to gravity (g) = 10 m/s²

Normal reaction (N) = mg = 8 × 10 = 80 N

Fբ = μN

Fբ = 0.21 × 80

Frictional force (Fբ) = 16.8 N

Force (F) = 17 N

Fₙ = F – Fբ

Fₙ = 17 – 16.8

Mass (m) = 8 Kg

Net force (Fₙ) = 0.2 N

a = Fₙ / m

a = 0.2 / 8

Therefore, the acceleration of the box is 0.025 m/s²

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Answer:

overtones

Explanation:

Answer:

18 degrees Celsius is equivalent to 64.4 degrees Fahrenheit.

Explanation:

To convert Celsius to Fahrenheit by using the formula

: (°C x 1.8) + 32 = °F

18 °C = 64.4 °F . Fahrenheit is a temperature scale created by German physicist Daniel Gabriel Fahrenheit in 1724.

What is Fahrenheit?

On this scale, temperature is measured by the expansion of a liquid, specifically a mercury-in-glass thermometer. The scale is based on three fixed points: the freezing point of pure water is defined as 32°F and the boiling point of pure water is defined as 212°F. The third point, 96°F, was determined to be body temperature. On the Fahrenheit scale, the difference between the freezing point and the boiling point of water is 180°F. There are 180 intervals between the two fixed points, and each interval is one degree.

The degree Fahrenheit (°F) is the most commonly used unit of temperature in the United States. 18 x (9/5) + 32 = 64.4°F

Therefore,  18 °C = 64.4 °F

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True. Newton's Laws of Motion are fundamental principles that describe the relationship between force and motion. The first law, also known as the Law of Inertia, states that an object at rest will stay at rest, and an object in motion will stay in motion with a constant velocity in the absence of a net external force. This means that without any forces acting on it, an object will continue its current state, whether that's being stationary or moving.

The second law, also known as the Law of Acceleration, describes the effects of applying a force to an object. It states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically, this can be represented as F = ma, where F is the net force, m is the mass, and a is the acceleration.

The third law, also known as the Law of Action and Reaction, states that for every action, there is an equal and opposite reaction. This means that when a force is applied to an object, the object exerts an equal force back in the opposite direction.

In summary, Newton's Laws of Motion describe both what happens in the absence of a force and the effects of applying a force to an object. Therefore, the statement is true.

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\(\bold{Heya!}\)

(b) comb induces a net dipole moment opposite to the direction of field.

When a comb rubbed with dry hair it's attracts pieces of piece of paper. This is because the comb that induces of the dipole net that of the moment thatopposite of the field. And, This happens the field dueing to charge of the comb induces of the dipole moment in the paper of the molecules in the dielectric.

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\(\underline{Answer :}\)

Jaceysan ~

Answer:

Option B

Explanation:

When a comb is rubbed with dry hair it induces some charge or its get charged either positive or negative

As paper remains in neutral hence it attracts the paper

Hence option B is correct

Answer:

True!

Explanation:

Scientists usually state or determine the average temperature/precipitation over a long period of time. Several different tables or graphs are used to prove and check that this is true. Hope this helps!

Answer:

3.33 seconds

Explanation:

formula of impulse J=Ft

so 10(5) = 15x

x = 50/15 = 3.33

Answer:

The answer is "\(0.13562748\)"

Explanation:

Please find the complete question in the attached file.

Using formula:

\(\bold{U_s=\frac{v^2}{rg}}\)

Given:

\(r=1.60 \times 10^2 \ m\\\\g=9.8\\\\v= 52.5\ \frac{km}{hr}= 14.583\ \frac{m}{s}\)

put the value into the above-given formula:

\(U_s= \frac{14.583^2}{160 \times 9.8}\)

    \(= \frac{212.663889}{1568}\\\\=0.13562748\)

Answer:

If a star is moving towards the earth, its light is shifted to higher frequencies on the color spectrum (towards the green/blue/violet/ultraviolet/x-ray/gamma-ray end of the spectrum). A higher frequency shift is called a "blue shift".

Explanation:

It just means that the entire spectrum is shifted up in frequency.

Answer:

C, Both are formed at the boundary of warm and cool air masses.

Answer:

c

Explanation:

The voltage at the inverting terminal is 7.5 V. V out is -12.5 V. The current flowing through R4 is 0.5 mA.

Given that Vn, Vout, and lout for the circuit shown below and op amp is ideal.In the circuit, current I2 flows through the 2.5 kΩ resistor.

Therefore, the voltage drop across the 2.5 kΩ resistor is given by,

Vn = I2 x R2Vn = 3 mA x 2.5 kΩ = 7.5 V

Therefore, the voltage at the inverting terminal is 7.5 V.

Since op-amp is assumed to be ideal, no current flows into the inverting and non-inverting terminals.

Therefore, current through R3 is given by,

I3 = (Vn - Vout) / R3=> Vout = Vn - I3 x R3=> Vout = 7.5 V - 4 mA x 5 kΩ=> Vout = - 12.5 V

Therefore, Vout is -12.5 V.

Let's calculate the current flowing through R4:

This current will also flow through the 5 kΩ resistor.

Let lout be the current flowing through R4.

Therefore, current through the 5 kΩ resistor is also lout.

Now, I4 + lout = I3=> I4 = I3 - lout=> I4 = 4 mA - lout

Also, I4 = (5 V - Vout) / R4=> 4 mA - lout = (5 V - (-12.5 V)) / 5 kΩ=> 4 mA - lout = 3.5 mA=> lout = 0.5 mA

Therefore, lout is 0.5 mA.

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The magnitude of the force is 2772 N/C².

The magnitude of the force a 22 μC charge exerts on a 3.5 mc charge 50 cm away can be found using Coulomb's law. Coulomb's law states that the magnitude of the electrostatic force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
The formula for Coulomb's law is F = kq₁q₂/r², where F is the magnitude of the force, k is Coulomb's constant (9 × 10⁹ Nm²/C²), q₁ and q₂ are the charges, and r is the distance between the charges.
Plugging in the given values, we get:

F = (9 × 10⁹ Nm²/C²)(22 × 10⁻⁶ C)(3.5 × 10⁻⁶ C)/(0.5 m)²

F = (9 × 10⁹ Nm²/C²)(77 × 10⁻¹² C²)/(0.25 m²)

F = (693 × 10⁻³ Nm²/C²)/(0.25 m²)

F = 2772 N/C²

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Answer:

Farmers

Explanation:

At the time of founding our country most soldiers in the revolutionary war were farmers who were inexperienced.

Answer:

D. farm workers

Explanation:

It is because when they started founding the country, people needed food and everything was based on agriculture and economy, and the main economy wat cotton and tobacco.

Answer:

7) there is a theory that these animals can see the magnetic field of the Earth due to a compass like mechanism inside their eyes in order to navigate.

8) Earth's magnetic field is a result of the currents found inside the outer core that consist of electricity.

From the calculation, the activity of the isotope is 70.7 Bq.

We define the term half life as the amount of a radioactive isotope that is left after a given time. It is in fact the time that it takes for only half of the amount of the radioactive isotopes that is in a sample to remain.

Recall that if a substance is radioactive, this implies that the sample is capable of spontaneous disintegration. The amount of the sample that is present tends to diminish in the system as time increases.

Give the fact that;

Ao = initial activity = 100Bq

A = activity after time t = ??

Time taken = 5 minutes

Half life of the isotope = 10 minutes

Now we know that;

A/Ao = (1/2)^t/t1/2

A/100 = (1/2)^5/10

A/100 =  (1/2)^1/2

A =  (1/2)^1/2 * 100

A = 70.7 Bq

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Answer:

50° and 60°

Explanation:

hope this help

The amount of work required to stop the cart is 7.84 J.

Mass of cart, m = 1 kg

Speed of cart, v = 2 m/s

Displacement, d = 0.2 m

Height of the table, h = 0.8 m

Let's calculate the gravitational potential energy of the cart as the cart is at the height of the table.

Energy = mgh

Energy = 1 x 9.8 x 0.8

            = 7.84 J

The above value represents the energy of the cart before it was stopped.

When the cart is stopped, this energy gets converted into work done by the force of friction.

Let W be the work done by the force of friction.

Then,

W = Energy before - Energy after

W = 7.84 J - 0 J (as the cart has come to a stop)

W = 7.84 J

Therefore, the amount of work required to stop the cart is 7.84 J.

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Answer:14.8

Explanation:

Trust me

The distance will be = 14.85 m

A region around a charged particle or object within which a force would be exerted on other charged particles or objects.

given :

Charge (q)= 2.45*\(10^{-6}\) C

Electric field (EF) =  100 N/C

to find = ? distance (r)

Electric field = 1/4π∈o * (q/\(r^{2}\))

         100      = 9 * \(10^{9}\) *  ( 2.45*\(10^{-6}\) / \(r^{2}\))

          \(r^{2}\) = 220.5

          r= \(\sqrt{220.5}\)

          r = 14.85 m

The distance will be = 14.85 m

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The surface tension of the liquid is 24.1 g/m.

To calculate the surface tension of the liquid, we can use the formula:

surface tension = (extra force required) / (length of the film)

extra force required = 3.03 g

internal radius = 3 cm = 0.03 m

external radius = 3.2 cm = 0.032 m

The length of the film can be calculated as the circumference of the external ring minus the circumference of the internal ring:

length of the film = (2 * pi * external radius) - (2 * pi * internal radius)

= (2 * pi * 0.032 m) - (2 * pi * 0.03 m)

= 0.1257 m

So, the surface tension can be calculated as:

surface tension = (3.03 g) / (0.1257 m)

= 24.1 g/m

The surface tension of the liquid is 24.1 g/m.

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The Bicyclist's Acceleration is 2.7 m/s2. Thus, Option C is the answer

The bicyclist's acceleration can be found using the equation:

acceleration = (final velocity - initial velocity) / time

In this case, the final velocity is 12.15 m/s, the initial velocity is 0 m/s (since the bicyclist starts from rest), and the time is 4.5 seconds. Plugging these values into the equation, we get:

acceleration = (12.15 m/s - 0 m/s) / 4.5 seconds

acceleration = 2.69 m/s2

Therefore, The correct answer is c. 2.7 m/s2

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Major League Baseball games last an average of 190.885 minutes with a standard deviation that was not specified in the question. The standard deviation is a measure of how much the data deviates from the mean or average.

It can be used to determine the spread of the data and how closely the individual values cluster around the mean. Without the standard deviation, it is difficult to make any further conclusions about the duration of MLB games.

It seems that your question is incomplete, and I cannot provide a proper answer without the necessary information.

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Answer:

Work done, W = 8 J

Explanation:

We have,

Force acting on the cart is 4 N

Cart covers a distance of 2 m

We need to find the work done by the cart. Work done by an object is given in terms of force and displacement. It can be given by :

\(W=Fd\\\\W=4\ N\times 2\ m\\\\W=8\ J\)

So, the work done by the cart is 8 J.

UWB WiGig, also known as Ultra-Wideband Wireless Gigabit, is a high-speed wireless communication technology that operates in the 60 GHz frequency band. This statement is true.

It is designed to provide data transfer rates of up to 7 Gbps and has a range of up to 100 meters. However, it is essential to note that these values may vary depending on environmental factors such as obstructions and interference.

WiGig was developed by the Wireless Gigabit Alliance, which later merged with the Wi-Fi Alliance. The technology is intended for applications such as high-definition video streaming, virtual reality, and wireless docking stations.

One of its main advantages is its ability to provide low-latency and high-speed data transfer, making it ideal for applications that require real-time communication.

In summary, UWB WiGig is a wireless communication technology that operates in the 60 GHz frequency band, providing data transfer rates of up to 7 Gbps and a range of up to 100 meters. The technology is designed for applications that require high-speed, low-latency wireless communication and can be affected by environmental factors.

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At t=0 a grinding wheel has an angular velocity, the wheel turned through a total angle of approximately: 501.21 radians between t=0 and the time it stopped.

To find the total angle through which the wheel turned between t=0 and the time it stopped, we need to consider two parts: the angle covered during constant angular acceleration, and the angle covered while coasting to a stop.

1. During constant angular acceleration:
At t=0, the angular velocity is 21.0 rad/s, and the angular acceleration is 26.0 rad/s². The circuit breaker trips at t=2.10 s. Using the equation θ1 = ω0t + 0.5αt², we can find the angle covered during this time:

θ1 = (21.0 rad/s)(2.10 s) + 0.5(26.0 rad/s²)(2.10 s)²
θ1 ≈ 63.21 rad

2. While coasting to a stop:
After the circuit breaker trips, the wheel turns through an angle of 438 rad as it coasts to a stop at constant angular acceleration. This means θ2 = 438 rad.

To find the total angle through which the wheel turned, simply add θ1 and θ2:

Total angle = θ1 + θ2 = 63.21 rad + 438 rad ≈ 501.21 rad

Therefore, the wheel turned through a total angle of approximately 501.21 radians between t=0 and the time it stopped.

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Answer:

Definition of envelop

transitive verb

1: to enclose or enfold completely with or as if with a covering

2: to mount an attack on (an enemy's flank)

Answer:

the weight is different on the moon

Explanation:

When you suspend your body from a pair of vertical ropes, the tension in each rope will be (c) equal to your weight.

According to Newton's third law of motion, for every action, there is an equal and opposite reaction. When you hang from the ropes, your weight acts downward, and the ropes provide an upward force to counteract your weight. This upward force is the tension in the ropes.

To maintain equilibrium and prevent any acceleration, the tension in each rope must be (c) equal to your weight. This balancing of forces ensures that you remain stationary and do not move up or down.

Therefore, the tension in each rope when you suspend your body will be equal to your weight.

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Answer:

Solar panels have increased in efficiency over the past 20 years

Explanation:

Because if efficiency have increased other technologies will be discovered

Answer:

Solar panels have increased in efficiency over the past 20 years

Explanation:

Dark nebulae are thought not to contain stellar nurseries because they are primarily composed of gas and dust, which are the building blocks of stars, but they are too cold and dense to collapse and form stars.

A nebula is a distinctively luminous region of the interstellar medium, which may be made up of cosmic dust, neutral, neutrally ionized, or molecular hydrogen.

Because dark nebulae are predominantly made of gas and dust, the raw materials for stars, but are too cold and dense to collapse into stars, it is believed that they do not contain stellar nurseries.

In other words, the gas and dust in a black nebula are not in an ideal environment to start the star-forming process.

The quantity of light that is accessible for star formation may be diminished by the dust particles in dark nebulae that can absorb and scatter light.

Thus, despite the fact that black nebulae may contain a lot of gas and dust, they are not suitable for the formation of new stars, and are unlikely to contain stellar nurseries.

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