10(x-5)=80I understand what im doing but I am stuck

Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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Answer:

lamp power with what is the current through the lamp when it is connected to a battery ?

Explanation:

If the light bulbs are connected in parallel, the current flowing through the light bulbs combine to form the current flowing in the battery, while the voltage drop is 6.0 V across each bulb and they all glow. One bulb burning out in a series circuit breaks the circuit.

The study of radioactivity by Marie Curie marked a significant turning point in the realm of physics and had a significant influence on scientific knowledge. Now let's get into the specifics.

"Radioactivity" is the term Marie Curie coined to describe the phenomenon whereby materials emit radiation that can fog photographic plates. During her uranium investigation in 1896, she made this discovery. This game-changing discovery opened the door for more research into and comprehension of radioactivity, which resulted in important developments in the field of nuclear physics.

Marie Curie's research on radioactivity served as a springboard for additional nuclear physics research and has profound ramifications for other fields of science and medicine. It resulted in improvements in our knowledge of atomic structure, the creation of radiation therapy for the treatment of cancer, and the eventual exploitation of nuclear energy.

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Answer:

Electrons is your answer

Explanation:

Answer:

Electrons!

Explanation:

Electricity is the energy generated by the movements of electrons (negative charge) and positrons (positive charge) within conductive materials.

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Answer:a licensed physician

Explanation: taking the osha test now.

A licensed physician is the one to carry out a post-exposure medical evaluation. (Option A)

Post-exposure Medical Evaluation is any medical evaluation started after exposure to a pathogen in order to prevent the infection from occurring.

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The data table supports that: Option B, "the force of gravity depends on the masses of the objects interacting." is the correct answer.

What is gravity?

Gravity, also sometimes called as gravitation, is the non-changing force of attraction that binds everything together in mechanics. Being the weakest known force in nature, it has little effect on determining the intrinsic properties of common objects.

In the given data table, the distance is same in all five cases, but we can see that the force of gravity is increasing with increase in mass of any one of the object or both of them. We can also understand it as the force of gravity is increasing with the increase in combined mass of both objects.

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a) The isocost curve equation is G = (20000 - 100C)/500. b) The isocost curve equation is G = (30000 - 100c)/500. c) The isocost curve equation is G = (20000 - 100C)/375. d)  The isocost curve equation is G = (20000 - 120C)/500.

To draw the isocost curve showing the different combinations of gas and coal, we need to use the cost per unit values for coal and gas, as well as the given expenditure (TC) and the changes in expenditure or prices.

Let's denote the quantity of coal as C and the quantity of gas as G. The cost per unit of coal is 100, and the cost per unit of gas is 500.

(a) Initial expenditure (TC) of 20000:

To find the combinations of gas and coal that can be purchased with an initial expenditure of 20000, we can use the following isocost equation

TC = 100C + 500G

We can rearrange the equation to solve for G in terms of C

G = (TC - 100C) / 500

Now we can plot the isocost curve with TC = 20000 using the equation above.

(b) Expenditure (TC) increases by 50%

If the expenditure increases by 50%, the new expenditure (TC_new) becomes 1.5 × TC = 1.5 × 20000 = 30000.

We can use the same isocost equation as before, but with the new expenditure value:

TC_new = 100C + 500G

Rearranging the equation to solve for G

G = (TC_new - 100C) / 500

Now we can plot the isocost curve with TC_new = 30000.

(c) Gas price reduced by 25%:

If the gas price is reduced by 25%, the new cost per unit of gas (Gas_new) becomes 0.75 × 500 = 375.

We can use the original isocost equation, but with the new cost per unit value:

TC = 100C + 375G

Rearranging the equation to solve for G

G = (TC - 100C) / 375

Now we can plot the isocost curve with the reduced gas price.

(d) Coal price rises by 20%

If the coal price rises by 20%, the new cost per unit of coal (Coal_new) becomes 1.2 × 100 = 120.

We can use the original isocost equation, but with the new cost per unit value:

TC = 120C + 500G

Rearranging the equation to solve for G:

G = (TC - 120C) / 500

Now we can plot the isocost curve with the increased coal price.

By plotting these isocost curves on a graph with G on the y-axis and C on the x-axis, we can visualize the different combinations of gas and coal that can be purchased at the given expenditures or price changes.

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Using velocity and acceleration, a. To determine the location of the car when its velocity is zero, we must identify the roots (time instances) of the velocity equation, which is the first derivative of the position equation.

The velocity equation is as follows: \(v(t) = (9.60m/s^3) t - (0.600m/s^7)t^7.\)

To find the roots of this equation, we can use numerical techniques like Newton-Raphson or bisection. The velocity equation can also be seen to be a seventh-degree polynomial with up to seven roots. By setting the velocity equation to zero and calculating the root, we can apply a numerical solution or perform a hand calculation to obtain the first root (i.e., the first time the car has zero velocity).

b. The formula for the acceleration equation, which is the second derivative of the position equation, is: \(a(t) = (9.60m/s^2) - (6.00m/s^6)\)\(t^6\)

c. and d. To discover the acceleration at the second time occurrence when the car has zero velocity, find the second root by repeating step a and using the acceleration equation to find the acceleration.

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Answer:

Explanation:

A plane mirror will produce a virtual image of a real object. But it is correct that a plane mirror will also produce a real image of a virtual object.A virtual image An image in a mirror is a virtual object, which can in turn be used to create another image. This can occur when you have more than one optical element in the optical system. Then the object of one component becomes the image of the next optical component.

So the answer is Yes it will!!!!

Answer:

I think u know the answer of this question

The focal length image distance is dependant on the convex surface of the lens and if the curvature of the lens changes, the focal length also changes.

As the object distance gets very large, (compared to focal length) the distance of the image reaches focal length.

For example, if the object is a mile away, the image distance equals the focal length.

The focal length image distance is dependant on the convex surface of the lens and if the curvature of the lens changes, the focal length also changes.

From the axis of the curved lens,

The key equation is the lens equation:

1/p + 1/q =  1/f  

where p is the object distance,

q is the image distance

f is focal length.

If, we assume, the image distance is equal to the object distance we can write

2/p  =   1/f

so  f =  p/2

Hence this is how we can describe the relationship between focal length and convex lens.

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Answer:

Length of the wire in meters​ = 0.000628 meter (Approx.)

Explanation:

Given:

Diameter of wire = 0.2 mm

Find:

Length of the wire in meters​

Computation:

Radius of wire = 0.2 / 2

Radius of wire = 0.1

Length of the wire = Circumference of circle

Circumference of circle = 2πr

Length of the wire = 2πr

Length of the wire = 2(3.14)(0.1)

Length of the wire = 0.628 mm (Approx.)

1 meter = 1,000 mm

So,

Length of the wire in meters​ = 0.000628 meter (Approx.)

c)5A

Explanation:

As,

\(I = \frac{P}{V} = \frac{1000}{220} = 5\)

The bullet takes 0.0025 seconds to pass through the wooden plank of 5 cm thickness when it is traveling horizontally with an initial speed of 30 m/s and a final speed of 10 m/s.

The time taken by the bullet to pass through the wooden plank can be determined using the equation of motion for constant acceleration.

Given:
Initial speed (u) = 30 m/s

Final speed (v) = 10 m/s

Distance (s) = 5 cm = 0.05 m

To find the time taken (t), we need to calculate the acceleration (a) first. We can use the equation:

v² = u² + 2as

Rearranging the equation, we have:

a = (v² - u²) / (2s)

Substituting the given values:

a = (10² - 30²) / (2 * 0.05)

Simplifying the expression:

a = (-800) / (0.1)

a = -8000 m/s²

The negative sign indicates that the acceleration is in the opposite direction of the initial velocity.

Next, we can use the equation of motion:

v = u + at

Substituting the values:

10 = 30 + (-8000) * t

Simplifying the equation:

-8000t = -20

Dividing by -8000:

t = 20 / 8000
t = 0.0025 s

Therefore, the time taken by the bullet to pass through the wooden plank of 5 cm thickness is 0.0025 seconds.


To find the time taken by the bullet to pass through the wooden plank, we need to calculate the acceleration first using the equation of motion.

By rearranging the equation and substituting the given values, we can find the acceleration.

Then, using the equation of motion again, we can solve for time.

The negative sign in the acceleration indicates that it is in the opposite direction of the initial velocity.

The resulting time is 0.0025 seconds.

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lol i’m in your physical science class what was the answer

A Frost circle is a diagram used to determine the π electron structure of a cyclic molecule.

(a) The cyclopentadienyl anion has six π electrons and a planar structure. To draw its Frost circle, we start with a circle representing the ring and divide it into six segments.

B) The cyclopropenyl cation has two π electrons and a non-planar structure. To draw its Frost circle, we start with a triangle representing the ring and label the atomic orbitals as p orbitals.

The electron structure in physics refers to the arrangement of electrons around the nucleus of an atom. According to the laws of quantum mechanics, electrons occupy specific energy levels or orbitals, and their behavior is described by wave functions.

The first energy level can hold up to two electrons, the second level can hold up to eight electrons, and so on. Electrons in the outermost energy level, also known as the valence electrons, are responsible for the chemical properties of the element.

The electron structure of an atom can be determined using the periodic table, which organizes the elements based on their electron configurations. Understanding the electron structure is crucial in predicting the chemical properties and behavior of elements and their interactions with other elements in chemical reactions.

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Answer:

search up a answer key it really helps

Explanation:

Answer:

10 kg rock at 15 degrees

Explanation:

did test

The change in gravitational potential energy of the spacecraft as it moves from point B to point A is 8.3x10^9 J.

The change in gravitational potential energy of the spacecraft as it moves from point B to point A can be calculated using the formula:

                    \(ΔPE = -GMm(1/rA - 1/rB)\) , where

ΔPE is the change in gravitational potential energy,

G is the gravitational constant,

M is the mass of the planet,

m is the mass of the spacecraft,

rA is the distance from the planet's center at point A, and

rB is the distance from the planet's center at point B.

Using the given values, we have:

\(ΔPE = -(6.67x10^-11 Nm^2/kg^2)(1.50x10^24 kg)(650 kg)(1/5.00x10^7 m - 1/0)\)\(ΔPE = -(6.67x10^-11 Nm^2/kg^2)(1.50x10^24 kg)(650 kg)(1/5.00x10^7 m - 1/0)\)

Simplifying the expression, we get:

\(ΔPE = -8.3x10^9 J\)

Therefore, the change in gravitational potential energy of the spacecraft as it moves from point B to point A is \(8.3x10^9\)J, which is a negative value because the spacecraft is moving closer to the planet and its gravitational potential energy is decreasing.

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The areas of physics involved in each of the following tests of lightweight metal alloy proposed for use in sailboat hulls are as follows:
a. Testing the effects of a collision on the alloy - The area of physics involved in this test is mechanics, specifically the study of forces and motion.
b. Testing the effects of extreme heat and cold on the alloy - The area of physics involved in this test is thermodynamics, specifically the study of heat and temperature and their relation to energy and work.
c. Testing whether the alloy can affect a magnetic compass needle - The area of physics involved in this test is electromagnetism, specifically the study of the relationship between electricity and magnetism.

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Answer:

x = 4.32 [m]

Explanation:

We must divide this problem into three parts, in the first part we must use Newton's second law which tells us that the force is equal to the product of mass by acceleration.

∑F = m*a

where:

F = force = 700 [N]

m = mass = 2030 [kg]

a = acceleration [m/s²]

Now replacing:

\(F=m*a\\700=2030*a\\a = 0.344[m/s^{2}]\)

Then we can determine the final speed using the principle of conservation of momentum and amount of movement.

\((m_{1}*v_{1})+Imp_{1-2}=(m_{1}*v_{2})\)

where:

m₁ = mass of the car = 2030 [kg]

v₁ = velocity at the initial moment = 0 (the car starts from rest)

Imp₁₋₂ = The impulse or momentum (force by the time)

v₂ = final velocity after the impulse [m/s]

\((2030*0) + (700*5)=(2030*v_{2})\\3500 = 2030*v_{2}\\v_{2}=1.72[m/s]\)

Now using the following equation of kinematics, we can determine the distance traveled.

\(v_{2}^{2} =v_{1}^{2}+2*a*x\)

where:

v₂ = final velocity = 1.72 [m/s]

v₁ = initial velocity = 0

a = acceleration = 0.344 [m/s²]

x = distance [m]

\(1.72^{2}=0^{2} +(2*0.344*x) \\2.97 = 0.688*x\\x = 4.32 [m]\)

When the Bowen ratio is low and negative, it means the surface is wet, and the latent heat flux is significant, while the sensible heat flux is minor. Because of Arctic sea ice's nature, the Bowen ratio is expected to be small and negative.

During summer, the Arctic sea ice's surface temperatures are often above 0° C, with a temperature inversion expanding from the surface to altitudes of some hundred meters.

For such conditions, the sensible heat flux H is expected to be positive, while the latent heat flux H L is expected to be small or zero. The Bowen ratio B is expected to be small and negative.

Let us discuss each term in more detail. Sensible heat flux (H):The rate of heat transfer from the Earth's surface to the atmosphere due to the temperature difference is referred to as the sensible heat flux. The earth surface warms up due to solar radiation, and then the warm surface transfers heat to the cooler air. The air then heats up and rises, creating convection currents that aid in the heat transfer process.

Sensible heat flux is positive when heat moves from the surface to the atmosphere.Latent heat flux (H L ):The heat required for a phase transition, such as a liquid converting to a gas, is referred to as latent heat. The energy required to convert a material from one phase to another is referred to as latent heat. Evaporation and transpiration are the two main processes that contribute to the latent heat flux.

Because Arctic sea ice's surface temperature is typically above the melting point of ice during summer, the latent heat flux is expected to be small or zero.

Bowen ratio (B):The Bowen ratio is a measure of the ratio of sensible heat flux to latent heat flux. It's a dimensionless quantity that helps to understand the surface's evapotranspiration efficiency.

When the Bowen ratio is low and negative, it means the surface is wet, and the latent heat flux is significant, while the sensible heat flux is minor. Because of Arctic sea ice's nature, the Bowen ratio is expected to be small and negative.

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1. Sensible heat flux (H) is negative, indicating heat transfer from the surface to the atmosphere.
2. Latent heat flux (H_L) is positive, indicating heat transfer from the atmosphere to the surface through evaporation.
3. Bowen ratio (B) is negative, indicating that the sensible heat flux is larger than the latent heat flux. The magnitude of the Bowen ratio can vary depending on the specific conditions.

In summer, surface temperatures over Arctic sea ice are often above 0°C, and there is a temperature inversion that extends from the surface to altitudes of a few hundred meters.

1. Sensible heat flux (H): The sensible heat flux is the transfer of heat between the surface and the atmosphere due to temperature differences. In this case, the sensible heat flux is expected to be negative. This means that heat is being transferred from the surface (warmer) to the atmosphere (cooler). The magnitude of the sensible heat flux can vary depending on the temperature difference between the surface and the atmosphere, but it is generally larger when the temperature difference is greater.

2. Latent heat flux (H_L): The latent heat flux is the transfer of heat between the surface and the atmosphere due to the evaporation and condensation of water. In this case, the latent heat flux is expected to be positive. This means that heat is being transferred from the atmosphere (warmer) to the surface (cooler) through the process of evaporation. The magnitude of the latent heat flux depends on factors such as the availability of moisture and the temperature difference between the surface and the atmosphere. It can be larger when there is more moisture available for evaporation and when the temperature difference is greater.

3. Bowen ratio (B): The Bowen ratio is the ratio of sensible heat flux to latent heat flux. It provides information about the relative importance of sensible and latent heat transfer processes. In this case, the Bowen ratio is expected to be negative. This indicates that the sensible heat flux is larger than the latent heat flux. The magnitude of the Bowen ratio can vary depending on the specific conditions, but it is generally larger when the sensible heat flux is dominant.

To summarize:
- Sensible heat flux (H) is negative, indicating heat transfer from the surface to the atmosphere.
- Latent heat flux (H_L) is positive, indicating heat transfer from the atmosphere to the surface through evaporation.
- Bowen ratio (B) is negative, indicating that the sensible heat flux is larger than the latent heat flux. The magnitude of the Bowen ratio can vary depending on the specific conditions.

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Answer:

A

Explanation:

The gold used in the making of jewelry is usually not pure but a heterogeneous mixture of metals. Pure gold is quite soft and even though it may look better in appearance compared to those made using heterogeneous mixtures, it usually bends easily. Hence, in order to make the jewelry more durable, gold is usually mixed with other metals to form a heterogeneous mixture.

The correct option is A.

For parallel circuits, the voltage drop at each resistor is the same as the voltage of the source.

For a guitar string that is 1 meter long, the wavelength of the first harmonic is 2 meters.

The formula for calculating the wavelength of the first harmonic for a guitar string is:

Wavelength = 2 * String length / First harmonic

Given that the guitar string is 1 meter long and we want to calculate the wavelength of the first harmonic, we can substitute these values into the formula as follows:

Wavelength = 2 * 1 meter / 1

Wavelength = 2 meters

Therefore, the wavelength of the first harmonic for a guitar string that is 1 meter long is 2 meters.

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If the fringe spacing is 80 cm, the distance between the aerials  is 6.25 meter.

In physics, interference refers to the combined result of two or more wave trains travelling along intersecting or converging trajectories. The result is the result of adding the individual wave amplitudes at each place that is influenced by multiple waves.

Given: wavelength  = 50 mm = 50 × 10⁻⁴  m

the fringe spacing is = 80 cm = 0.80 m.

x = λD/d

d =  λD/x

= 50 × 10⁻⁴ × 1000/0.80 m

= 6.25 meter.

Hence,  the distance between the aerials  is 6.25 meter.

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a spoken explanation of a 3D stress element's faces' stress vector directions.

A cube-shaped element with faces that are 90 degrees from one another is a 3D stress element. The stress vectors are identified as sigma x, sigma y, and sigma z, respectively, while the three faces are designated as x, y, and z. The axes of the x, y, and z are indicated by the basis vectors.

The stress vector sigma x points in the positive x-direction on the x-face of the stress element. The stress vector sigma y on the y-face points in the right y direction. The stress vector sigma z points in the upward z-direction on the z-face. The normal stresses that are exerted on the element's faces are represented by these stress vectors.

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Answer:

To find the volume of a rectangular object, measure the length, width and height. Multiply the length times the width and multiply the result by the height. The result is the volume. Give the result in cubic units, such as cubic centimeters.

Explanation:

Answer:

Kinetic energy is the energy possessed by an object due to its motion. If an object is moving, then it has kinetic energy. The amount of kinetic energy depends on mass and speed.

Explanation:

The spring will stretch approximately 10 centimeters. To determine the amount the spring will stretch, we can use Hooke's Law, which states that the force exerted by a spring is directly proportional to the displacement or stretch of the spring.

Hooke's Law can be expressed as:

F = kx,

where F is the force exerted by the spring, k is the spring constant, and x is the displacement or stretch of the spring.

Given:

Weight of the box (F) = 40 N,

Spring constant (k) = 400 N/m.

We need to convert the weight of the box into force by considering that weight is the force exerted due to gravity.

Weight (W) = Mass (m) × Acceleration due to gravity (g).

Since weight is given as 40 N, and acceleration due to gravity is approximately 9.8 m/s², we can calculate the mass of the box:

40 N = m × 9.8 m/s².

Solving for mass (m), we find m ≈ 4.08 kg.

Now, let's calculate the stretch of the spring:

F = kx,

40 N = 400 N/m × x.

Solving for x, we find x ≈ 0.1 m.

Since the question asks for the stretch in centimeters, we convert 0.1 m to centimeters:

0.1 m × 100 cm/m = 10 cm.

Therefore, the spring will stretch approximately 10 centimeters.

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Answer:

The pressure exerted by a women wearing shoes with pointed heels is much greater than what an elephant with one foot can exert on ground. This because of lesser area of contact of pointed heels.

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