If the Sun were approximated by a grapefruit in your room, the nearest star (Proxima Centauri) would be approximated by:

Answer:

Red I'm pretty sure

Explanation:

Vocanic ash and sunsets. Volcanic eruptions can inject millions of tonnes of dust and gaseous sulfur dioxide into the stratosphere. ... The dust and aerosol produce vivid sunset and twilight effects like the intense yellow-red horizon and purple-pink glows of the photograph.

The sky is a Dark Black.

Explanation:

The smoke from the volcano fills the sky with black smoke

Answer:

kinetic energy

Explanation:

Answer:

5

Explanation:

Using the formula

Number of images = 360/theta - 1

theta is the angle of inclination

Given

Theta = 60°

Substitute

Number of images = 360/60 -1

Number of images = 6-1

Number of images = 5

Hence the number of images formed is 5

We are asked to determine the distance between crest of a sound wave that has a frequency of 440 Hz. To do that we will determine the wavelength using the following formula:

Where:

The speed of sound at 20°C is equal to:

Now, we substitute the values:

Solving the operations:

Therefore, the distance from crest to crest is 0.78 meters.

Now, we are asked to determine the time it takes the string to go from the crest to the trough. To do that we will determine the period first using the following formula:

Now, we substitute the frequency:

Now, since the time it takes to go to crest to trough is half the time it takes the wave to go from crest to crest we divide the result by two:

Therefore, the time is 0.0012 seconds.

Petroleum is a non-renewable resource, which means that it cannot be replenished. Because of this, its usage needs to be planned properly to make sure that there is sufficient availability for present and future needs

The optimal level of use of petroleum can be achieved by several ways which are listed below:

1. Reduce wastage: The optimal level of petroleum use can be achieved by reducing wastage. We should aim to use petroleum products efficiently to minimize wastage and ensure that the resource is not used up too quickly.

2. Develop alternative energy sources: Another way to achieve the optimal level of petroleum use is to develop alternative energy sources. Renewable energy sources like solar, wind, and hydro can be developed to supplement petroleum.

3. Increase efficiency: The third way to achieve the optimal level of petroleum use is to increase efficiency. We can achieve this by improving the efficiency of vehicles and machinery that consume petroleum products.

4. Conservation: Conservation can also help achieve the optimal level of petroleum use. We can conserve petroleum by using it judiciously and avoiding unnecessary use. We can also reduce our reliance on petroleum products by using alternatives like public transport or bicycles.

5. Develop sustainable transportation: Developing sustainable transportation can also help achieve the optimal level of petroleum use. We can develop transportation systems that are more efficient, rely on alternative energy sources, and reduce the amount of petroleum consumed.

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Answer:

Ferrari would stop first.

Explanation:

The momentum of a moving body is given as:

momentum, P = mass of the body x its velocity

i. For the Freight,

mass = 5000 tons = 4535924 kg

speed = 10 mph  = 4.4704 m/s

P = mv

  = 4535924 x 4.4704

  = 20.28 x \(10^{6}\)

P = 20.28 x \(10^{6}\) kgm/s

ii. For the Ferrari,

mass = 3250 lb = 1474.175 kg

speed = 250 mph = 111.76 m/s

P = mv

   = 1474.175 x 111.76

   = 16.48 x \(10^{4}\)

P = 16.48 x \(10^{4}\) kgm/s

Comparing the momentum of the two objects, the Ferrari would stop fist when break is applied.

Answer:

Once you have drawn the free-body diagram, you can use vector addition to find the net force acting on the object. We will consider three cases as we explore this idea:

Case 1: All forces lie on the same line.

If all of the forces lie on the same line (pointing left and right only, or up and down only, for example), determining the net force is as straightforward as adding the magnitudes of the forces in the positive direction, and subtracting off the magnitudes of the forces in the negative direction. (If two forces are equal and opposite, as is the case with the book resting on the table, the net force = 0)

Example: Consider a 1-kg ball falling due to gravity, experiencing an air resistance force of 5 N. There is a downward force on it due to gravity of 1 kg × 9.8 m/s2 = 9.8 N, and an upward force of 5 N. If we use the convention that up is positive, then the net force is 5 N - 9.8 N = -4.8 N, indicating a net force of 4.8 N in the downward direction.

Case 2: All forces lie on perpendicular axes and add to 0 along one axis.

In this case, due to forces adding to 0 in one direction, we only need to focus on the perpendicular direction when determining the net force. (Though knowledge that the forces in the first direction add to 0 can sometimes give us information about the forces in the perpendicular direction, such as when determining frictional forces in terms of the normal force magnitude.)

Example: A 0.25-kg toy car is pushed across the floor with a 3-N force acting to the right. A 2-N force of friction acts to oppose this motion. Note that gravity also acts downward on this car with a force of 0.25 kg × 9.8 m/s2= 2.45 N, and a normal force acts upward, also with 2.45 N. (How do we know this? Because there is no change in motion in the vertical direction as the car is pushed across the floor, hence the net force in the vertical direction must be 0.) This makes everything simplify to the one-dimensional case because the only forces that don’t cancel out are all along one direction. The net force on the car is then 3 N - 2 N = 1 N to the right.

Case 3: All forces are not confined to a line and do not lie on perpendicular axes.

If we know what direction the acceleration will be in, we will choose a coordinate system where that direction lies on the positive x-axis or the positive y-axis. From there, we break each force vector into x- and y-components. Since motion in one direction is constant, the sum of the forces in that direction must be 0. The forces in the other direction are then the only contributors to the net force and this case has reduced to Case 2.

If we do not know what direction the acceleration will be in, we can choose any Cartesian coordinate system, though it is usually most convenient to choose one in which one or more of the forces lie on an axis. Break each force vector into x- and y-components. Determine the net force in the x direction and the net force in the y direction separately. The result gives the x- and y-coordinates of the net force.

Example: A 0.25-kg car rolls without friction down a 30-degree incline due to gravity.

We will use a coordinate system aligned with the ramp as shown. The free-body diagram consists of gravity acting straight down and the normal force acting perpendicular to the surface.

We must break the gravitational force in to x- and y-components, which gives:

F_{gx} = F_g\sin(\theta)\\ F_{gy} = F_g\cos(\theta)F

gx

​

=F

g

​

sin(θ)

F

gy

​

=F

g

​

cos(θ)

Since motion in the y direction is constant, we know that the net force in the y direction must be 0:

F_N - F_{gy} = 0F

N

​

−F

gy

​

=0

(Note: This equation allows us to determine the magnitude of the normal force.)

In the x direction, the only force is Fgx, hence:

F_{net} = F_{gx} = F_g\sin(\theta) = mg\sin(\theta) = 0.25\times9.8\times\sin(30) = 1.23 \text{ N}F

net

​

=F

gx

​

=F

g

​

sin(θ)=mgsin(θ)=0.25×9.8×sin(30)=1.23 N

Answer:

Inertia

Explanation:

Part of Newton's Laws of Motion

Answer:

vestibular

Explanation:

Answer: A moving block , a moving trailer and a rolling block.

Explanation:

Answer:

I think its uniform I dont really know

The average velocity is given by

Where d is the distance covered and t is the time taken.

For the given case, we have

d = 75 m

t = 8.9 s

Therefore, the average speed of the hockey player is 8.43 m/s

The hockey player is moving at a speed of 9.5 m/s.

Answer:

The net force is 9.8ms2, but were you given the acceleration?

Answer:

Electrical energy is transformed into heat and light energy

Explanation:

hope this helps

The speed of the train (sound source) is 25.76 m/s.

The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium.

Given,

Frequency of whistle when train approaches = f₁ = 92 Hz

Frequency of whistle when train recedes = f₂ = 79 Hz

Sound speed = v = 340 m/s

Required Information:

equation for speed of train = ?

Speed of train = v₀ = ?

So,

92 =  f₀ ( 340/(340 + v₀) )

79 = f₀ ( 340/(340 - v₀) )  

Train's speed = v₀ = 25.76 m/s

There are two cases here with respect to the movement of train and standing person

Case 1: When the train approaches

f₁ = f₀ ( v/( v + v₀) )  

when the train's whistle blows at f0 when it passes over a person

92 =  f₀ ( 340/(340 + v₀) )

Case 2. When the train recedes

f₂ = f₀ ( v/( v - v₀) )

79 = f₀ ( 340/(340 - v₀) )  

We can concurrently answer these two equations because there are only two unknowns.

92 =  f₀ ( 340/(340 + v₀) )   eq. 1

79 = f₀ ( 340/(340 - v₀) )     eq. 2

Dividing eq. 1 by eq. 2, f₀ cancels out

92/79 = ( 340/(340 + v₀) )/( 340/(340 - v₀) )

340 m/s cancels out

1.164 = (340 + v₀) / (340 - v₀)

1.164(340 - v₀) = (340 + v₀)

395.76 - 1.164v₀ = 340 + v₀

395.76 - 1.164v₀ - 340 - v₀ = 0

-2.164v₀ + 55.76 = 0

-2.164v₀ = -55.76

v₀ = 55.76/2.164

v₀ = 25.76 m/s

As a result, the train's (sound source) speed is 25.76 m/s.

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I understand that the question you are looking for is "You are standing on a train station platform as a train goes by close to you. As the train approaches, you hear the whistle sound at a frequency of f1 = 92 Hz. As the train recedes, you hear the whistle sound at a frequency of f2 = 79 Hz. Take the speed of sound in air to be v = 340 m/s.

Randomized Variables

fi = 92 Hz

f2 = 77 Hz

Find an equation for the speed of the sound source vs, in this case it is the speed of the train."

In the given system of masses, the rotational kinetic energy can be calculated using the formula 1/2Iω^2, where I is the moment of inertia and ω is the angular speed.

The moment of inertia for a system of point masses can be calculated by summing the products of each mass with the square of its distance from the axis of rotation.

Assuming the masses are located at the vertices of a regular hexagon, the moment of inertia can be calculated as I = (3/2)mr^2, where m is the mass of each particle and r is the distance from the axis of rotation to a vertex. The distance r can be calculated using the Pythagorean theorem as r = a/√3, where a is the side length of the hexagon.

Substituting the values given in the question, we get I = (3/2)(2 kg)(0.1 m)^2 = 0.03 kg·m^2. Therefore, the rotational kinetic energy of the system can be calculated as (1/2)(0.03 kg·m^2)(20 rad/s)^2 = 6 J.

Thus, the correct option among the given choices is c. 2270 J.

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The magnetic field will not be produced by the a) stationary electric charge.

A moving charge will always produce a magnetic field, and on the other hand, static charge no longer produces a magnetic field due to the fact it affects both the electric and magnetic field, additionally not able to offer any impact on the magnet. That's the reason a static charge doesn't produce a magnetic field.

But the moving electric charge, electric current, electro-magnet, and current-carrying solenoid will produce the magnetic field along the movement the charges in their system where the magnetic field will flow along the axis.

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Answer: 5+ 3 cm

Explanation:look all

The molar mass of a gas at 78 c and 560 torr if 206 ng occupies 0.206 ul is 41.64 g/mol

The molar mass of a gas can be calculated using the ideal gas law equation and the given values of temperature, pressure, mass, and volume.

To calculate the molar mass of a gas, we can use the formula:

Molar mass = (mass of gas) / (number of moles of gas)

First, we need to determine the number of moles of gas. We can use the ideal gas law equation:

\(PV = nRT\)

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

We are given the temperature as 78 °C, which needs to be converted to Kelvin by adding 273.15:

T = 78 + 273.15 = 351.15 K

The pressure is given as 560 torr, and the volume is given as 0.206 µl.

Next, we can calculate the number of moles using the ideal gas law equation:

\(n = (PV) / (RT)\)

(0.5105 atm)(2.06×10⁻⁷ L) = n(0.0821 L-atm/mol-K)(318 K)

n = 4×10⁻⁹ mol

Molar mass = Mass/n = 2.06×10⁻⁷ g/4×10⁻⁹ mol

Molar mass = 41.64 g/mol

Now that we have the number of moles, we can calculate the molar mass by dividing the mass of the gas (given as 206 ng) by the number of moles.

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Given:

The area of the plate is: A = 0.188 m²

The field produced between the plates is: E = 37000 N/C

To find:

The charge to be placed on the plates.

Explanation:

The electric field produced between two parallel plates is given as:

Here, Q is the charge on the parallel plates and ε₀ is the permittivity of free space having a value of 8.85 × 10⁻¹² C²/N.m²

Rearranging the above equation, we get:

Substituting the values in the above equation, we get:

Final answer:

The amount of charge to be placed on parallel plates is 6.156 × 10⁻⁸ C.

Explanation:

= 5 cm = 0.05 m

T = 0.2 s

ω=2π/T=2π/0.2=10πrad/s

When displacement is y, then acceleration, a=−ω2y

Velocity, V=ωr2−y2

Case (a)    When y=5cm=0.05m

a=−(10π)2×0.05=−5π2m/s2

V=10π×(0.05)2−(0.05)2=0

Case (b)    When y=3cm=0.03m

a=−(10π)2×0.03=−3π2m/s2

V=10π×(0.05)2−(0.03)2=10π×0.04=0.4π m/s

Case (c)    When y=0

a=−(10π)2×0=0

V=10π×(0.05)2−02=

hope it helps. pls follow and mark as brainliest

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

f is the force

m is the mass

From the question we have

\(a = \frac{500}{65} = 7.692307... \\ \)

We have the final answer as

Hope this helps you

Answer:

time graph reveals pertinent information about an object's velocity. For example, a small slope means a small velocity; a negative slope means a negative velocity; a constant slope (straight line) means a constant velocity; a changing slope (curved line) means a changing velocity.

Answer:

the answer is in the pic below :)

Explanation:

The claim that there is at least one number that is three greater than twice its fifth power can be proven using the Intermediate Value Theorem.

To apply the Intermediate Value Theorem, we need to show that the function f(x) = \(2x^5\)+ 3 is continuous on a closed interval [a, b] and takes on both positive and negative values.

1. Continuity:

The function f(x) = \(2x^5\) + 3 is a polynomial function, and polynomial functions are continuous for all real numbers. Therefore, f(x) is continuous on the entire real number line.

2. Positive and Negative Values:

To show that f(x) takes on both positive and negative values, we can consider the limits of f(x) as x approaches positive and negative infinity:

- As x approaches positive infinity, the term \(2x^5\) dominates the function, and f(x) approaches positive infinity.

- As x approaches negative infinity, the term \(2x^5\) dominates the function, and f(x) approaches negative infinity.

Since f(x) approaches both positive and negative infinity as x approaches infinity and negative infinity respectively, it must take on all values in between, including positive and negative values.

By the Intermediate Value Theorem, since f(x) is continuous on the real number line and takes on both positive and negative values, there must exist at least one number c for which f(c) = 0. In other words, there is at least one number that is three greater than twice its fifth power.

In conclusion, by satisfying the hypotheses of the Intermediate Value Theorem, we can prove the claim that there is at least one number that is three greater than twice its fifth power.

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Answer:

24 meters

Explanation:

From 0 - 4 secs. the distance traveled forward 8 meters. From 4 - 6 secs. the distance traveled another 8 meters forward. Then from 6 - 10 secs. the distance traveled backward 8 meters for a total of 24 meters.

Answer:

Explained below.

Explanation:

Conductors can be defined as materials that permit electricity to flow through them easily.

Now, metals have a molecular structure that makes them good conductors because electrons in the atoms of these conductors tend to move freely from one atom to the other. So a majority of metals make good conductors because these metals tend to hold their electrons loosely. In short, it can help engineers make powerful batteries because then it means that they are capable of giving much more electrical energy since nowadays, advanced batteries make use of ion charges for the batteries.

The velocity of the jet is calculated to be 900 miles/hr when the relation between velocities of both propeller and the jet is given.

The distance travelled by a propeller plane and a jet = 3000 miles

Velocity of the plane Vp = 1/3 Velocity of the jet Vj

Vp = 1/3 Vj

Vj = 3 Vp ----(1)

Time taken by the propeller plane to complete the trip = 10 hours

Velocity of the propeller plane = Distance of the propeller plane/Time

⇒ 3000/10 = 300 miles/hr

The velocity of the jet = 3 times the velocity of the propeller plane

⇒ 3 × 300 miles/hr = 900 miles/hr

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If infrared radiation is released by the Earth and there is an increased level of carbon dioxide in the atmosphere, then it is absorbed and heats the atmosphere (option A).

Greenhouse gases such as carbon dioxide and methane are well known to increase global warming because they trap the radiation that otherwise will be dissipated from the atmosphere to space.

Therefore, with this data, we can see that greenhouse gases are associated with global warming and it is the reason for which the dramatic increase in carbon dioxide levels may be dangerous.

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As a result, when you raised your speed form 5 km/h into 10 km/h, you increased the kinetic energy from a factor of 4.03.

The energy of motion is kinetic energy, which can be observed in the motion of an object or subatomic particle. All particles & moving objects contain kinetic energy. When something moves, whether it's a person walking, an baseball flying through the air, an piece of bread falling out of a table, or charged particles inside an electric field, it has kinetic energy.

Radiant, thermal, acoustic, electrical, and mechanical kinetic energy are the five main categories.

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