Jessica has a mass of 55kg she sleds down a hill that has a slope of 32 degrees. what is the component of her weight that is along her direction of motion ?

Answer:

A is the correct answer

Electric field

Electric field is a electric force per unit charge.

The electric field is radially in toward a negative point charge and radially outward from a positive charge.

The direction of the field is in the direction of the force it exert on a positive test charge.

The formula of electric field is given as.

E = F /Q.

Properties of an Electric Field

Electric Field lines never intersect each other and they are perpendicular to the surface charge.

Electric field is strong when the lines are close together, and it is weak when the field lines move apart from each other.

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Answer:

Pool

Explanation:

I just answered it

On the basis of specific heat values, the coolest location for Vicente to be is known as Pool. Thus, the correct option for this question is A.

Specific heat may be defined as the quantity of heat that is ultimately required in order to increase the temperature of one gram of a substance by one Celsius degree. The units of specific heat are usually calories or joules per gram per Celsius degree.

According to the question, the specific heat of water is maximum, while the specific heat of porcelain is minimum. This represents that water is the coolest place in the Vicente while porcelain tile is the warmest place in the Vicente.

Therefore, on the basis of specific heat values, the coolest location for Vicente to be is known as Pool. Thus, the correct option for this question is A.

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Answer:

V1 = 360 V

Explanation:

Applying,

Vs/Vp = Ns/Np................ Equation 1.

Vs = Voltage of the secondary coil, Vp = voltage of the primary coil, Ns = number of coils in the secondary winding, Np = number of coils in the primary winding

make Vp the subject of the equation

Vp = VsNp/Ns............ Equation 2

Given: Vs = 120 V, Np = 9 coils, Ns = 3 coils

Substitute into equation 2

Vp = 120(9)/3

Vp = 360 V.

Hence, V1 = 360 V

Answer:

V1 = 360 V

Explanation:

hope i helped

Answer:

the answer is B :Bohr believed electron orbits were circular, but Schrödinger’s equations represent complex shapes describing the probable locations of electrons.

Explanation:

just took the test on edge

The main differences between the Schrödinger and Bohr atomic models are the representation of electron orbits and the explanation of the emission and absorption spectrum.

The main difference between the Schrödinger model and the Bohr atomic model is that Bohr believed electron orbits were circular, while Schrödinger's equations describe complex shapes representing the probable locations of electrons. This means that according to Bohr, electrons could only exist in specific orbits, while Schrödinger's model allows for electrons to be found in a range of locations within an atom.

Another difference is that the Bohr model did not explain the emission and absorption spectrum, whereas the energy levels described by Schrödinger's model successfully explained this property.

Lastly, Bohr believed that electrons circled the nucleus due to the attraction between positive and negative charges, while Schrödinger believed that electrons have wave-like properties.

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In chemical reactions, the products are the substances that are found on the right-hand side of the chemical equation, indicating the outcome of the reaction.

In chemical reactions, the products are the substances that are found at the end of the reaction. The correct answer is D. The reactants, which are the chemical before the reaction starts, are situated on the left side of the chemical equation, represented by a plus sign. An arrow points from the reactants to the products, indicating the direction of the reaction. The products, which are the chemical after the reaction ends, appear on the right-hand side of the equation. For instance, in the combustion of methane, the chemical equation is CH4 + 2O2
ightarrow CO2 + 2H2O, where CH4 and O2 are the reactants and CO2 + 2H2O are the products.

Answer:

3.0 V

Explanation:

The voltage across the bulb is the voltage across the batteries, since the batteries are the only source of power for the bulb. So the voltage across the batteries is 3.0 V.

The potential difference should be 3.0 V.

In the case when the potential difference for the flashlight is 3.0V so here the batters should be considered as the only source with respect to the power for the bulb. Due to this, the potential difference across the batteries combination that used to power should also be 3.0 V.

Therefore, The potential difference should be 3.0 V.

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Answer:

Chemical potential energy is a form of potential energy related to the structural arrangement of atoms or molecules. This arrangement may be the result of chemical bonds within a molecule or otherwise. Chemical energy of a chemical substance can be transformed to other forms of energy by a chemical reaction.

Explanation:

Answer:

answer in picture

Explanation:

Answer:

E is the Crest.

Answer:

The efficiency of the engine is 59.2%.

Explanation:

We have,

Work done by the gasoline engine is 45 J and the for every 76 J of heat it takes in.

It is required to find the efficiency of the engine. Efficiency of the engine is given by the ratio of work done to the heat taken i. Its formula is given by :

[tex]\eta=\dfrac{W}{Q}\\\\\eta=\dfrac{45}{76}\\\\\eta=0.592\\\\\eta=59.2\%[/tex]

So, the efficiency of the engine is 59.2%.

Final answer:

The efficiency of the engine is approximately 59.21%, calculated by dividing the work done by the engine (45 J) by the heat input (76 J) and then multiplying by 100.

Explanation:

The efficiency of a heat engine is the ratio of work output to heat input, expressed as a percentage. To calculate the engine's efficiency, you divide the work done by the engine by the heat energy that was put into the engine, and then multiply by 100 to convert the decimal to a percentage. In the given problem, the engine does 45 J of work and takes in 76 J of heat, which means the efficiency (η) is calculated as:

η = (Work done / Heat input) × 100

η = (45 J / 76 J) × 100

η = (0.59210526315...) × 100 ≈ 59.21%

The engine's efficiency is therefore approximately 59.21%.

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

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

Change in speed = (0 km/sec) - (38 km/sec) = -38 km/sec

Acceleration = (-38 km/sec) / (36.3 sec) = -1,046.8 m/s²

Now, before we split up our points and go home, let's see what we've actually got here.

-- The plane's landing speed is about 111 times the speed of sound !

-- It rolls to rest 36.3 seconds after it touches down at this speed.

-- In order to do that, it pulls about 107 G's !

It seems to me that during the ground roll, the flight crew's eyeballs fall out, then they get ripped out of their seat belts and crash through the windshield, and the plane continues on with no life forms aboard. Then, maybe 1 second later, the drogue  parachute tears off, the tires on the landing gear blow out and get shredded, the remaining fuel sloshes through the walls of the tanks and evaporates catastrophically, the wings fall off and scrape along the ground in a shower of sparks, the cloud of fuel vapor ignites and then erupts in a ball of flame, the people downtown notice it on the horizon and marvel at it, and then any remaining flaming pieces of the plane come to rest in the dense pine forest and the apartment complex 2 miles past the end of the runway.

This is not my business.  I only used the numbers you gave me in the question.  My math and physics are flawless, I gave you a theoretically bullet-proof answer, and this is a privilege and a pleasure for you and will stand you in good stead.  You're welcome.

Answer:

[tex]n=5[/tex]

Explanation:

The De Broglie equation is given by:

[tex]\lambda=\frac{h}{mv}[/tex]

Where:

Then:

[tex]v=\frac{h}{m\lambda}[/tex] (1)

The  energy equation of a hydrogen electron in a orbit n is:

[tex]E=-\frac{R_{H}}{n^{2}}[/tex] (2)

We can write E as a kinetic energy an use v of the equation (1)

[tex]\frac{1}{2}mv^{2}=\frac{R_{H}}{n^{2}}[/tex]

[tex]n^{2}=\frac{2R_{H}}{mv^{2}}[/tex]        

[tex]n=\frac{m\lambda}{h}\sqrt{\frac{2R_{H}}{m}}[/tex]      

[tex]n=\frac{9.1*10^{-31}*1.66*10^{-9}}{6.626*10^{-34}}\sqrt{\frac{2*2.18*10^{-18}}{9.1*10^{-31}}}[/tex]  

[tex]n=5[/tex]

I hope it helps you!

Given an electron in a hydrogen atom with a de Broglie wavelength of 1.66 nm, the quantum number or integer n that corresponds to its orbit is likely 1, suggesting the electron is in the ground state orbit of the atom.

Given the de Broglie wavelength (λ) of an electron in a hydrogen atom is 1.66 nm, we're to identify the integer n or quantum number that corresponds to its orbit. Specifically in the model of the atom proposed by Bohr and later modified by de Broglie, the electron orbits the nucleus in quantized orbits. These quantized orbits correspond to the de Broglie 'standing wave' concept where an integer number of wavelengths must fit exactly within the orbit.

To determine the quantum number n for the electron's orbit, we need to apply the formula for the de Broglie wavelength in a Bohr orbit: λ = 2πrn/n, where rn is the radius of the nth orbit. The radius of the nth orbit in a hydrogen atom is given by the formula rn = 0.529 * n² nm. Solving for n, we find n equals to approximately 1. This means the electron is likely in the ground state orbit of the hydrogen atom.

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Answer:

As the marble starts rolling down the roller coaster, the amount of potential energy stored in the marble decreases while its kinetic energy increases. Potential energy is also converted into heat energy due to friction.

Explanation:

As the marble rolls down the hill its potential energy is converted to kinetic energy (its height decreases, but its velocity increases). When the marble goes back up the loop its height increases again and its velocity decreases, changing kinetic energy into potential energy.

The two (2) ways in which the potential energy of a marble on a ramp can be increased are:

I. By placing the marble higher on the ramp.

II. By increasing the mass of the marble.

Potential energy can be defined as a type of energy possessed by an object (body) as a result of its position (height) above the earth.

Mathematically, potential energy (P.E) is calculated by using the following formula:

[tex]P.E = mgh[/tex]

Where:

Hence, potential energy (P.E) is highly dependent on two (2) main factors and these are:

1. Height above the ground.

2. The mass of an object.

In conclusion, the two (2) ways in which the potential energy of a marble on a ramp can be increased are:

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Answer:

Approximately [tex]2.9 \times 10^2 \; \rm m[/tex].

Explanation:

In that [tex]0.39\; \rm s[/tex], this sound wave travelled from the surface of the lake to the bottom, got reflected, and travelled back from the bottom to the surface. The sound wave travelled from the surface to the bottom (without bouncing back) in only [tex]1/2[/tex] that much time. In other words, it took only [tex]\displaystyle ((1/2) \times 0.39)\; \rm s[/tex] for the sound wave to travel from the surface to the bottom of the lake.  

The speed [tex]v[/tex] of sound in cold water ([tex]20\; \rm ^\circ C[/tex], [tex]1\; \rm atm[/tex]) is approximately [tex]1.482\times 10^{3} \; \rm m \cdot s^{-1}[/tex].

In [tex]t = ((1/2) \times 0.39) \; \rm s[/tex], that sound wave would have travelled a distance of:

[tex]\begin{aligned}s &= v \cdot t \\ &= 1.482 \times 10^3 \; \rm m \cdot s^{-1} \times \left(\frac{1}{2} \times 0.39 \; \rm s\right) \\ &\approx 2.9 \times 10^2\; \rm m \end{aligned}[/tex].

Therefore, the depth of the lake is approximately [tex]2.9 \times 10^2 \; \rm m[/tex].

Neptune, being the furthest from the Sun, has the slowest orbital speed at approximately 5 kilometers per second, in accordance with Kepler's laws.

Based on Kepler's laws of planetary motion, the planet with the slowest orbital speed in our solar system is Neptune. This is because the speed at which a planet orbits the Sun is inversely related to its distance from the Sun. As Neptune is the furthest planet from the Sun with a vast orbital period of 165 Earth-years, it also has the slowest average orbital speed, which is approximately 5 kilometers per second. In contrast, Mercury, with an orbital period of only 88 Earth-days, moves much faster with an average speed of 48 kilometers per second.

Answer:

I wrote down the answer and attached it below.

Explanation:

Hope this Helps!!!!

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Answer:

Every electric charge has a electric field.

The charges in the electric field are affected each other.

As you move away from the electric charge, the intensity of the electric field decreases.

The electric field is a vector quantity.

The electric field of each charge is calculated to find the intensity of the electric field at a point.

The vectorial sum of the vectors are found.

The electric field of the positive charge is directed outward from the charge.

Explanation:

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Answer:

Just as the angles of the sun, moon and Earth affect tidal heights over the course of a lunar month, so do their distances to one another. Because the moon follows an elliptical path around the Earth, the distance between them varies by about 31,000 miles over the course of a month.

Hope this helped, have a nice rest of your day!

Answer:

Light slows down when it moves from air into water.

Explanation:

It is the property of light that travels faster in a less dense medium.

In a more dense medium, the speed of the light slows down and bends towards the normal.

The air is less dense medium and water is a more dense medium.

When light passes from air to water, the light bends.

This is known as the refraction of light.

Answer:

C is the correct answer on Ed gen uity

Answer:

t = 4.1 seconds

Explanation:

It is given that,

Width of road which is to be crossed by a man is 8.25 m, it means it is distance to be covered.

Speed of man is 2.01 m/s

We need to find the time taken by the man to cross the road. It is a concept of speed. Speed of a person is given by total distance covered divided by time taken. So,

[tex]v=\dfrac{d}{t}[/tex]

t is time taken

[tex]t=\dfrac{d}{v}\\\\t=\dfrac{8.25}{2.01}\\\\t=4.1\ s[/tex]

So, the time taken by the man to cross the road is 4.1 seconds.

Answer:

The work done is 354.1032 Joules

Explanation:

To answer the question we note that the amount of work done is equivalent to the reduction in the kinetic energy of the bicyclist and bicycle.

Therefore, initial kinetic energy. KE[tex]_i[/tex] of the system is given by the following relation;

[tex]KE_i=\frac{1}{2} mv_{1}^{2}[/tex]

Final kinetic energy [tex]KE_f = \frac{1}{2} mv_{2}^{2}[/tex]

Where:

v₁ = Initial velocity = 3.95 m/s

v₂ = Final velocity = 1.31 m/s

m = Mass of the bicyclist and bicycle = 51.0 kg

Change in kinetic energy ΔKE;

[tex]\Delta KE = KE_f - KE_i[/tex]

[tex]\Delta KE =\frac{1}{2} mv_{2}^{2}-\frac{1}{2} mv_{1}^{2} = \frac{1}{2} m(v_{2}^{2}-v_{1}^{2}) = \frac{1}{2} \times 51 \times (1.31^{2}-3.95^{2}) = -354.1032 \ J[/tex]

Therefore, work done = -ΔKE = 354.1032 Joules.

Answer:

A fundamental quantity is something that can only be found by measuring, such as measuring the length of a pencil. We have no other way to find out the length of the pencil other than measuring it in some way.

A derived quantity is something that is calculated and that is not measured directly. Area is found by multiplying two lengths together. We cant find the area other than computing it somehow

Answer:

No work was done.

W = 0

Explanation:

Work is said to be done whenever a force of one newton moves a body of one kilogram through a distance of one meter. Meaning the applied force has to move the body from a point of rest through certain distance.

Work = force × distance

So, in the case of this question, we only have the force been applied, but no distance was covered. Hence, no work was done.

W = 3000× 0 meter

W = 0

Answer:

I will answer this in English, we can translate it to:

Why if you charge a mate by an amount of time you are not doing work?

This happens because work is defined as the displacement done by a force:

W = d*F

where W is work, d is the distance, and F is the force.

This means that the amount of time that you are charging your mate does not affect the mechanical work, the only time that you are doing work is when you are lifting him.

Answer:

Explanation:

Let the initial speed be u . final speed = 0

v² = u² - 2gh

v is final speed , u is initial speed , h is height .

0 = u² - 2g x 134

u² = 2 x 9.8 x 134

u = 51.25 m /s .

The initial speed of the arrow fired vertically upwards and reaching an altitude of 134m is approximately 51.7 m/s. This was calculated using the second equation of motion and taking into account gravitational acceleration.

This physics problem relates to projectile motion and can be solved using the concepts of kinematic equations. The known variables from the question are the final altitude (y = 134m) and the acceleration due to gravity (g = 9.81 m/s^2), which is always acting downward. We're looking for the initial speed (v0) of the arrow when it was released from the ground level.

Due to the arrow being launched upwards and then coming back down, the final velocity would be the negative of its initial velocity. Hence, we can say that v = -v0

According to the second equation of motion, v^2 = v0^2 + 2gy. Replacing known values, we get (-v0)^2 = v0^2 + 2*(-9.81)*134. From which we can solve for v0.

After simplifying the equation, we find that v0 = sqrt(v0^2 - 2*(-9.81)*134), this leads us to find that the initial speed of the arrow was approximately 51.7 m/s.

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Answer:

The correct options are;

D. The Sun

C. Galactic halo, thick disc, thin disc, extreme disc, black hole

Explanation:

1) The Milky Way galaxy consists of a disk, a central bulge and a halo , with the most prominent and visible part of the Milky Way galaxy being the disk

The  Sun can be found in the thin disk and not in the Milky Way's galactic halo

2) The structure of the Milky Way galaxy consists of

(1) Galactic halo (2) Spherical component (3) Spiral arms (4) Thick and thin disk (5) Central bulge (extreme disc) (6) Nucleus with black hole

Therefore, the correct order of the components of the Milky Way galaxy from outermost to innermost is as follows

Galactic halo, thick disc, thin disc, extreme disc, black hole.

The Sun is not found in the Milky Way galaxy's galactic halo. The order of components of the Milky Way galaxy from outermost to innermost is: Galactic halo, thick disc, thin disc, extreme disc, black hole.

The Milky Way galaxy's galactic halo is a spherical region encompassing the main, disc-shaped structure of the galaxy. It encompasses a few lone stars (Option A), dark matter (Option B), and some star clusters (Option C). However, the Sun (Option D) is not located in the galactic halo; instead, it's positioned within one of the spiral arms of the galaxy's disc. So, the answer is the Sun (Option D) is NOT found in the Milky Way galaxy’s galactic halo.

As for the order of components of the Milky Way galaxy from outermost to innermost: it starts with the galactic halo, followed by the thick disc, thin disc, extreme disc, and finally, at the center, we have the supermassive black hole. Therefore, the correct order is presented in Option C: Galactic halo, thick disc, thin disc, extreme disc, black hole.

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Answer:

For mirror A:

Object distance from mirror is 15 cm

Image distance from mirror is 30 cm

For mirror B;

Object distance = 15 cm

Image distance = 3.75 cm

Focal lenght = 3 cm

Explanation:

Detailed explanation and calculation is shown in the images below.

Answer:

V

Explanation:

Photons can be any size that I’d greater than around 6 Planck Lengths. So, technically they take the prize on both ends. We can see since the Higgs has the highest Energy. Therefore it will be smaller than most quarks except the top quark

Answer:

Even though the sun is much more massive and therefore has stronger overall gravity than the moon, the moon is closer to the earth so that its gravitational gradient is stronger than that of the sun.

Explanation:

(x=yt-2)^2(56-tea)^2x10r

Using the given information, we determined the position and velocity functions of the model rocket at different time intervals. The velocity function varies during the rocket's upward acceleration, free fall, and the subsequent parachute slowing. The position function gives the height of the rocket at any time.

To determine the position function s(t) and the velocity function v(t), we need to analyze the rocket's motion in different time intervals:

To find the position function s(t), we integrate the velocity function for each time interval:

The position function s(t) represents the height of the rocket at any time t, while the velocity function v(t) represents the rate at which the height is changing with respect to time.

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