Help me please, it's for physics and I really need help.

Answer:

The radius of the orbit must increase.

Explanation:

The magnitude of the projection of f along line ac. express this component as a cartesian vector.

General Guidance

This problem is based totally on the idea of role vector, projection of vectors and dot product.

function vector: role vector suggests the region of a factor in a vector space in terms of the unit vectors in distinct directions.

Dot Product: Dot product is used for representing  vectors in scalar shape. it's also called as scalar product.

Projection of vectors-

The projection of a vector on every other vector is in reality understood as obtaining the shadow of the primary vector along the course of the second vector.

first of all, calculate the placement vector of the point C with regards to the point A. Use the expression for the projection of a vector to calculate the projection of vector.

The magnitude of the projected component of F along AC is

This component as a cartesian vector.

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An EMT asks you how he can decrease the chances of being involved in a collision when driving with lights and sirens in progress. Your advice would be as if the lights of the oncoming car are blinding you, glance to the right side of the road rather than at it.

Drivers up to 3,000 feet away can be rendered blind by headlights approaching from behind. If you feel you won't be able to see after a car passes you, slow down and try not to look directly into its headlights.

If approaching headlights are blinding you while you are driving at night, look to the right side of the road. You'll be able to see other automobiles thanks to your peripheral vision. On your car, apply some reflective tape.

Items are visible at night because of their rich color and striking contrast. Reflective tape is a fantastic option to wear as a result of this especially in dark colours.

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Answer:

398.8

Explanation:

The common kinetic energy of the device is quality described through the word temperature.

Kinetic electricity is the power that an object possesses because of its mobility from one location to another. In a comparable vein, a system's temperature measures the average amount of kinetic strength in motion. As a end result, as molecules pass (circulate) greater swiftly in a device, the gadget's temperature rises because of heat being absorbed and an growth inside the average kinetic energy of the device.

clearly put, the size of temperature is how warm or bloodless some thing is basically, a thermometer is used to measure an object's temperature, and its units are;

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Since they are tightly packed, solids vibrate in place and have the least kinetic energy.

The vibration and movement of the particles are accelerated by kinetic energy. Due to the liquid's relative higher kinetic energy, particles in it slide past one another.

The kinetic hypothesis states that matter is made up of moving parts. Kinetic energy is what propels motion. The least kinetic energy is held by solid particles, while the most is held by gaseous particles.

The particles gather kinetic energy and accelerate as the temperature rises. The actual average speed of the particles is influenced by both their mass and temperature; at a given temperature, larger particles travel more slowly than lighter ones.

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Answer:

true

Explanation:

The magnitude of electric force on an electron in a uniform electric field of strength 2490 n/c that points due east is 3.9 x 10^22 N/C as per calculated.

The electric force present between the nucleus and the electrons is called as electric force.

This electric force can also be generally described as the repulsive or attractive interaction that is present between any two charged bodies.

Electric force is also defined as the attracting or repulsive interaction between any two charged things.

Electric force for any kind of electric field E for a point charge q can be formulated as:

F = q*e

The SI unit of electric field can be devised as volt per meter (V/m) or in other similar terms, newton per coulomb (N/C).

This electric force can be calculated via

F= qe

⇒ F= (1.6 x 10^-19) x 2490

⇒ F = 3.9 x 10^22 N/C

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Superman used x-ray vision to detect objects.

You will want at least two components for x-ray detection/vision to function: an x-ray source and an absorber for x-ray.

It isn't vital for the aspect you need to peer to be the supply; it only needs to take in a number of the light. The medical expert will region your chest between the absorber and source whilst taking a chest x-ray. because the coronary heart can in part soak up mild, it'll seem whiter than the lungs, which are formed of air and cannot achieve this.

Making X-ray photographs is viable. now not within the realm of technology fiction. this is how it goes. X-rays can be created via directing high-velocity electrons at a metal surface. X-rays are equal to seen light, besides their wavelength is notably shorter (but they're nevertheless electromagnetic waves). but, X-rays engage with depend in a special way than seen mild due to the fact they have got a unique wavelength (and frequency). this implies that some substances are truly transparent, including human flesh. by using passing X-rays thru a person and placing an X-ray detector on the alternative side, you may utilize this technique to supply an X-ray photograph.

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1. Earth is located at one focus of the Moon's orbit.

2. According to kepler's second law, jupiter will be traveling most slowly around the sun's aphelion

3. Earth orbits in the shape of a/an ellipse around the sun.

4. The mathematical form of Kepler's third law measures the period in years and the semimajor axis in astronomical units (AU).

5. According to Kepler's second law, Pluto will be traveling fastest around the Sun when at perihelion.

6. The extent to which Mar's orbit differs from a perfect circle is eccentricity.

Kepler's second law is a mathematical principle that states the distance between two objects in space is proportional to the square of their timescale of revolution. This means that as two objects orbit around each other, the further they will be from each other over time.

Kepler's Third Law is a scientific law that states the amount of time it takes for planets to orbit their star is inversely proportional to their distance from the sun.

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Yes! All orbiting objects adhere to Kepler's Second Law and other rules as well. Pluto moves more quickly when it is nearer the sun and less quickly when it is distant from it, much like every other object in our solar system.

In astronomy, Johannes Kepler's laws of planetary motion, which were written between 1609 and 1619, define the paths taken by planets as they round the Sun. The laws altered Nicolaus Copernicus' heliocentric theory, substituting elliptical trajectories for circular orbits and epicycles, thereby explaining the variation in planetary velocities. According to the three laws:

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1) What are the remote and immediate effects of the technology on the health of people?

2) Is there any avenue to handle potential health risks that could be associated with the new technology?

New technology  is always laden with a lot of inherent risk factors. The fact that the development if new technology often has to do  with the exploitation of the resources that help to sustain the environment leaves much to be desired.

When developing new technologies the following should be taken into consideration;

1) What are the remote and immediate effects of the technology on the health of people?

2) Is there any avenue to handle potential health risks that could be associated with the new technology?

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The pH(power of hydrogen) of the solution obtained by mixing 30.00ml of 0.250 m hcl and 30.00 ml of 0.125 m naph is 1.2.

In chemistry, the pH scale is used to define the acidity or basicity of an aqueous solution. Historically, pH stood for "potential of hydrogen." The pH values of acidic solutions are typically lower than those of basic or alkaline solutions.

The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

molarity of HCl = moalrity * volume

= 0.250 * 0.030 L

= 0.0075 moles

Moles of NaOH = (0.125) * (0.030L)

= 0.00375 Moles

moles of H + in axcess = Moles HCl - Moles NaOH

= 0.0075 - 0.00375

= 0.00375 moles

total volume = 30 + 30 = 60 ml = 0.060L

[H+] = moles/ volume = 0.00375/0.060L = 0.0625 M

pH = - log [H+]

= - log [0.0625M]

pH = 1.2

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Ann runs 800 meters without sandbags in 3 minutes. if she completes 800 meters with them in 2 more minutes. Ann's speed when jogging with sandbags is 160 m/min 

Speed is defined as the rate at which an object's motion changes in relation to its distance. Since speed is a scalar quantity, the direction of the motion has no bearing on the speed.

It differs from velocity due to this. The rate of change of motion is measured in velocity in a certain direction. Velocity is a vector question, therefore. It's important to move in this way.

Distance to time ratios are used to calculate speed.

Therefore, in this scenario, Speed would travel without a sandbag.

800/3 = 266.66 m/min

Speed while travelling without the sandbag,

800/5 = 160 m/min.

Therefore, the speed while travelling with the sandbag is 160 m/min.

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No, that is not conceivable. Heat flow in metal rod  is due to temperature differences, but over time, temperature equilibrium is attained, therefore there is currently no temperature difference is  at either end.

Metals vibrate continuously, and when one end of a metal is heated, the other end moves with the heated end. Conduction is the name given to this occurrence. Free electrons transfer the heat to the following atoms.

Even as solids, metals can carry electricity. The presence of delocalized electrons is the cause of this.

All metals are effective electrical conductors. Their conductivity is used to divide them into two groups. For instance, while sodium, potassium, and magnesium exhibit relatively low conductivity, copper, gold, and silver are all good conductors. Thus, they are referred to as normal conductors

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1 in every 2500 individuals would expect the hair color to be present in humans

At a specific genomic region, an allele is one of two or more variations of the DNA sequence (a single base or a segment of nucleotides). For each genomic region with such variation, an individual inherits two alleles, one from each parent. The person is homozygous for the allele if the two alleles are the same. The person is heterozygous if the alleles are distinct from one another. The term "allele" is used to refer to a gene's alternate form or variants. For each autosomal gene, one allele is inherited from each parent, and we often group the alleles into categories. Usually, we refer to them as normal, wild-type, aberrant, or mutant alleles.

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So you will tell your friend that the distance traveled by the object dropped is not equal to the product of speed and time since the object is also influenced by force of gravity.

The distance is traveled by the object is influenced by force of gravity and it can be calculated as follows;

v² = u² + 2gh

where;

v² = 0 + 2gh

v² =  2gh

h = v²/2g

h = (10²) / (2 x 9.8)

h = 5.1 m

From the calculation above, the distance traveled by the object is actually 5 m.

So you will tell your friend that the distance traveled by the object dropped is not equal to the product of speed and time since the object is also influenced by force of gravity.

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Answer: In optics, spherical aberration is an image imperfection that occurs due to the increased refraction of light rays that occurs when rays strike a lens or a reflection of light rays that occurs when rays strike a mirror near its edge, in comparison with those that strike nearer the centre.

Explanation:

In optics, spherical aberration (SA) is a type of aberration found in optical systems that have elements with spherical surfaces. Lenses and curved mirrors are prime examples, because this shape is easier to manufacture.

The acceleration of Team 1 and Team 2 are 22.3 m/[tex]s^{2}[/tex] and  20.6 m/[tex]s^{2}[/tex] respectively.

We have a game of tug of war between two teams.

We have to determine the acceleration of both the teams.

Force is the product of mass and its acceleration for a moving body. Mathematically -

F = ma

According to the question, we have -

TEAM - 1 :

The acceleration of team 1 can be calculated as follows -

F(1) = m(1) a(1)

a(1) = F(1) / m(1) = 1427 / 64 = 22.3 m/[tex]s^{2}[/tex]

TEAM - 1 :

The acceleration of team 2 can be calculated as follows -

F(2) = m(2) a(2)

a(2) = F(2) / m(2) = 1443 / 70 = 20.6 m/[tex]s^{2}[/tex]

Hence, the acceleration of Team 1 and Team 2 are 22.3 m/[tex]s^{2}[/tex] and  20.6 m/[tex]s^{2}[/tex] respectively.

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The cumulative distance the bird travels is 4.4 km.

The time of motion of the bird is calculated from the principle of relative velocity.

distance covered by bird - distance of runner = distance between them

vb_t - vr_t = d

(vb - vr)t = d

where;

(28.4 - 7.1)t = 3.3

21.3t = 3.3

t = 3.3/21.3

t = 0.155 hr

d = 0.155 hr  x 28.4 km/h

d = 4.4 km

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John's displacement as he walks round the garden is 314 m counterclockwise.

Displacement can be defined as the distance traveled  in a a specified direction.

To John's displacement, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, John's displacement as he walks round the garden is 314 m counterclockwise.

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Unit conversion is a way of converting some common units into another without changing their real value. The average speed of the migrating loon flies is 45.5019 miles/hr.

Unit conversion is a way of converting some common units into another without changing their real value. for, example, 1 centimeter is equal to 10 mm, though the real measurement is still the same the units and numerical values have been changed.

Given that migrating loon flies at an average speed of 19 m/s. Now, since 1 meter is equal to (1/1609.34) miles and 1 second is equal to (1/3600) seconds. Therefore, we can write the speed as,

[tex]\rm Speed = 19\ \dfrac{meter}{second}\\[/tex]

         [tex]=19 \times \dfrac{\frac{1}{1609.34}\rm\ miles}{\frac{1}{3600} \rm\ hours}[/tex]

         = 19 × (3600/1609.34) miles/hr

         = 42.5019 miles/ hr

Hence, the average speed of the migrating loon flies is 45.5019 miles/hr.

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Answer:

a

Explanation:

The radius of the cylindrical barrel is 0.78 m.

The circular area of the cylindrical barrel is calculated as follows;

P = F/A

A = F/P

where;

A = mg/P

A = (50 x 9.8) / (260)

A = 1.885 m²

A = πr²

r² = A/π

r = √(A/π)

r = √(1.885/π)

r = 0.78 m

Thus, the radius of the cylindrical barrel is 0.78 m.

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1024 many 5-nucleotide dna sequences are possible

because its permutation and combination 5 !

Nucleotides are organic compounds made up of a phosphate and a nucleoside. They function as monomeric units of the key macromolecules found in all living forms on Earth, deoxyribonucleic acid (DNA), and ribonucleic acid (RNA), which are both nucleic acid polymers. In addition to being produced by the liver from common nutrients, nucleotides can also be received through diet.

A nucleobase, a five-carbon sugar (ribose or deoxyribose), and a phosphate group made up of one to three phosphates are the three component molecules that make up a nucleotide. Guanine, adenine, cytosine, and thymine are the four nucleobases found in DNA; uracil is used in place of thymine in RNA. These four nucleobases are necessary for a variety of cellular processes, such as the synthesis of amino acids, proteins, and cell membranes, as well as for moving the entire cell and its constituent parts.

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Answer: 2.448 seconds

Explanation: it should take about 2.448 seconds, 2.45 if to nearest 100th, or 2.4 if to nearest tenth or just 2 seconds if rounded to the nearest whole number, earth's gravity is 9.8 m/s. 24 / 9.8 = 2.448979591.

displacement vector of the honeybee is  zero

displacement = final position - initial position

so the bee travelled from and returned back to home , so final and initial position is same

so the displacement vector will be zero.

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The correct answer is 3.286 kN/m³ .

The ratio of the densities of two different objects or substances is known as specific gravity. The majority of the time, the definition of specific gravity is given as the ratio of the substance's density to the density of water. A substance will float on the surface of water if its specific gravity is greater than 1.

The formula to calculate the unit weight is,

γ=ρg

Here, g is the acceleration due to gravity, and ρ is the density.

mass of  cream did not change

Density of cream = 1005kg/m³

As 1 cup cream  becomes 3 cups,

Therefore,

hence  specific gravity or specific weight  we get m / 3V           ( since m is same but V changed to 3V)

m/V = 1005 kg/m3  

now,  m/3V  = ( 1/3) ( m/V) = ( 1/3) ( 1005 kg/m3) =   = 335kg/m³

Now, unit weight of the whipped cream;

= 335×9.81 = 3286.35N/m³

= 3.286 kN/m³

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Yes, progression is slowly increasing the demand on the body and is necessary for development after a certain level has been achieved.

The process of Progressing your exercise is changing exercise so that it becomes more challenging to your body. A change in exercise prescription could mean changing the intensity of exercise making it more intense and increasing the duration of your exercise.

The overload principle states that the intensity with which an exercise is performed must be high enough above one's normal range for any desired physiological adaptation to occur.

The development of the muscles only take place after a certain level of stress beyond the usual capacity is applied on the muscles, causing the muscles of the body to stress and tear down.

With each tear in the muscles of the body the muscles gross strong as it heals.

This process is slow and required timely input making it sir in nature.

As body gets used to certain extend to the usual method of training the body's muscle development stops. Here comes the user of progression which involves intensifying the the usual method of exercise so that it becomes a challenge for the body to overcome.

Ultimately causing the development of strength in the muscles.

Hence, progression is slowly increasing the demand on the body and is necessary for development after a certain level has been achieved.

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The x and y components of the net force, F is 4.33N + 17.5N. The magnitude is 18.02 N and the direction is 76.10 N.

The initial velocity is Vi = 3 m/s

(a) F₁x = Fcosθ

Or,  F₁x = 5Ncos30

Or,  F₁x = 4.33 N

F₁y = Fsinθ

F₁y = 5Nsin30

Or, F₁y = 2.5 N

F₂x = 0

F₂y = 15Nsin30

F₂y = 2.5 N

Therefore, the net force is, F = 4.33N + 17.5N

(b) The magnitude of the net force is

F =√Fx² + Fy²

F = √(4.33)² + (1.75)²

F = 18.02 N

So, the magnitude is 18.02 N.

The direction is

θ = Tan⁻¹[Fy/Fx]

Or, θ = Tan⁻¹ [17.5/4.33]

θ = 76.10 N

The direction of the net force is 76.10 N.

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Designing investigations to predict the effect of hurricanes (D) best describes a scientific endeavor.

A scientific endeavor builds scientific knowledge by postulating theories that explains any phenomenon. It might differ from what was already known as the truth. In a scientific endeavor, a problem is first identified, observations are made, hypothesis are created based on the observations and experiments are conducted to prove the hypothesis.

The other options manly focusses on developing devices and technologies to prevent or withstand hurricanes which are examples of engineering endeavors.

Therefore, Designing investigations to predict the effect of hurricanes (D) best describes a scientific endeavor.

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