Physics High School

which of the following astronomical bodies is the highest in hierarchy
earth
galaxy
solar system
star

Answers

Answer 1
Galaxy would be the highest in hierarchy because stars and planets are last and galaxies consist of solar systems so galaxy is the biggest.
Answer 2

Answer:

Galaxy

Explanation:

The astronomical body which is the highest in hierarchical order is the Galaxy.

The order of the astronomical body from the Highest to Lowest include

:Universe, galaxy, solar system, star, planet, moon and asteroid.

In the example above , the order of hierarchy from highest to lowest is Galaxy, Solar system, Star, Earth(planet).

Related Questions

Jake uses a fire extinguisher to put out a small fire. When he squeezes the handle, the flame rettardant is released from the extinguisher with considerable force. As a result, Jake has to reinforce his grip on the extinguisher to hold it in place as it pushes back into his hands. The projectile in this scenario is the . The recoil in this scenario is the . The force on the flame rettardant is the force on the extinguisher. The mass of the flame rettardant is the mass of the extinguisher. The acceleration of the flame rettardant is the acceleration of the extinguisher.

Answers

The projectile in this scenario is the flame r.

The recoil in this scenario is the extinguisher.

The force on the flame r is equal to the force on the extinguisher.

The mass of the flame r is less than the mass of the extinguisher.

The acceleration of the flame r is greater than the acceleration of the extinguisher.

Answer:

The projectile in this scenario is the flame r.

The recoil in this scenario is the extinguisher.

The force on the flame r is equal to the force on the extinguisher.

The mass of the flame r is less than the mass of the extinguisher.

The acceleration of the flame r is greater than the acceleration of the extinguisher.

Which one of the following statements best describes the just world hypothesis?

Answers

The just-world hypothesis is the assumption that a person's actions are inherently inclined to bring morally fair and fitting consequences to that person, to the end of all noble actions being eventually rewarded and all evil actions eventually punished. 

The statement that best describes the just world hypothesis is people deserve what happens to them, whether good or bad. The correct option is a.

What is a hypothesis?

A hypothesis is a testable declaration about the relationship among two or more variables or a suggested explanation for some observed phenomenon in a scientific context.

A hypothesis is an assumption formed based on evidence. This is the first step in any investigation that converts research questions into predictions. It consists of variables, a population, and the relationship between the variables.

A hypothesis is a statement rather than a question. The scientific question in your project is not your hypothesis. The hypothesis is a well-informed, testable prediction of what will occur.

A scientific paper should begin with a clear statement of the hypothesis. This helps the reader understand the issue. People deserve what happens to them, whether good or bad, according to the statement that best describes the just world hypothesis.

Thus, the correct option is a.

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Your question seems incomplete, the missing options are:

a. People deserve what happens to them, whether good or bad.

b. If people act with integrity, they contribute to a just world.

c. The world is just, but some people don't think it is.

d. People who work hard are superior to those who are lazy. User: If you exhibit a high level of psychological hardiness, you're probably the type of person who

A buoy is anchored to the ocean floor. A large wave approaches the buoy. How will the buoy move as the wave goes by?

Answers

The buoy will move up and down as the wave passes by. A buoy is an anchored floating object. It is used by sailors to navigate through the waters. It is also used to mark reefs and other hazards. When strong waves go by, the buoy will move with the flow of the wave.

The buoy will be moved by the force exerted on it by the waves.

Explanation

As the buoy is anchored to the ocean floor, the buoy will be floating in the ocean floor.

When the large wave approaches, it will act as an external unbalanced force on the buoy.

The waves will consist of crest and trough.

The crest region have higher force. So the crest will first interact with the buoy and the external force of crest will make the buoy to float upward along with the motion of crest.

Then the trough region will lessen the force and thus it will again come back in its original position.

How do scientists detect the various electromagnetic waves coming from space?

Answers

The electromagnetic spectrum defines all the wavelengths of light. Scientist uses different kinds of telescopes sensitive to different wavelengths of the spectrum. Large infrared telescopes are used to view the core of our galaxy. Moreover, radio telescopes are used to map the structure of our galaxy while microwave telescopes captures the remnant glow of the Big Bang.

a student pushes a 40-N block across the floor for a distance 0f 10 m how much work was done to move the block?

Answers

w=f*d
= 40N * 10m
work= 400 joules
We don't know how much force s/he had to use to push the block.
If the floor was smooth and wet, it needed very little force.
If there was sandpaper or stones on the floor, it took a lot of force.

Whatever amount of force s/he needed to use, the work done was

          Work  =  (amount of force, in Newtons) x (10 m)

          The unit is Joules.

A sled and rider, gliding over horizontal, frictionless ice at 4.3 m/s , have a combined mass of 74 kg . the sled then slides over a rough spot in the ice, slowing down to 2.9 m/s . part a what impulse was delivered to the sled by the friction force from the rough spot?

Answers

The impulse of a force is defined as
[tex]I=F \Delta t[/tex]
where F is the intensity of the force and [tex]\Delta t[/tex] the time of application of this force.

We can rewrite the previous relationship by using Newton's second law:
[tex]F= ma[/tex]
substituting, the equation for the impulse becomes
[tex]I = m a \Delta t[/tex]

But the acceleration is the variation of the velocity in the time interval:
[tex]a= \frac{\Delta v}{\Delta t} [/tex]
so we can rewrite I as
[tex]I = m \frac{\Delta v}{\Delta t} \Delta t = m \Delta v [/tex]

the combined mass of sled and rider is m=74 kg, while the variation of velocity is 
[tex]\Delta v = 2.9 m/s - 4.3 m/s = -1.4 m/s[/tex]
and so we can calculate the impulse of the friction force:
[tex]I= (74 kg)(-1.4 m/s)=-103.6 kg m/s[/tex]
where the negative sign means the friction force acts against the motion, to decelerate the system.

Two devices with capacitances of 25 μf and 5.0 μf are each charged with separate 120 v power supplies. calculate the total energy stored in the two capacitors. your answer submit

Answers

The energy stored in a capacitor is given by
[tex]U= \frac{1}{2} CV^2[/tex]
where C is the value of the capacitance while V is the voltage difference applied to the capacitor.

Let's calculate the energy of the first capacitor:
[tex]U_1 = \frac{1}{2} (25\cdot 10^{-6}F)(120 V)=1.5 \cdot 10^{-3}J[/tex]

And now the energy of the second capacitor:
[tex]U_2 = \frac{1}{2} (5 \cdot 10^{-6}F)(120 V)=3 \cdot 10^{-4}J[/tex]

So, the total energy stored in the two capacitors is
[tex]U=U_1 +U_2 = 1.8 \cdot 10^{-3}J[/tex]

Answer:

Total energy stored in both is 0.0018J

Explanation:

Formula to calculate the total energy stored between two capacitors = 1/2CV²

Energy stored the First Capacitor = 1/2 × 25× 10⁻⁶f × (120)²

Energy stored = 0.0015J

Energy stored in the second Capacitor = 1/2 × 5× 10⁻⁶f × (120)²

Energy stored = 0.0003J

Total Energy stored = Energy stored in capacitance 1 + Energy stored in Capacitor 2

= 0.0015J+ 0.0003J

= 0.0018J

what's the method for displacement in physics. I NEED HELP ASAP

Answers

V=d/t
V= speed or Velocity
D = displacement/ distance
T= time

When Jamie removes a woolen cap, his hair develops an excess of static charge Which of these BEST explains this phenomenon?

Answers

The only explanation here is that while he was wearing the woolen cap, which is constantly rubbing his/her hair, it already generated static. Wool is a material which produces static when rubbed to hair. As a result, when the woolen cap was removed, it produced an excess static charge.
The only clarification here is that whereas he was wearing the woollen cap, that is continually rubbing his/her hair, it already generated statically. Wool may be a material that produces static once rubbed to hair. As a result, once the woollen cap was removed, it made an associate excess static charge.

Explanation:

Hair gets packed with static within the wintertime because of lack of wetness within the air. moisture is contributory for volume, movement and curl. additionally, the heat from your significant winter attire and overclothes like scarves, woolly collars and jackets can cause fly-away strands

Static electricity is that the results of an imbalance between negative and positive charges in an object. These charges will build upon the surface of an object until they notice the simplest way to be free or discharged. a technique to discharge them is through a circuit.

The rubbing of bound materials against each other will transfer negative charges or electrons.

When a neutral metal sphere is charged by contact with a positively charged glass rod, the sphere
(1) loses electrons
(2) gains electrons
(3) loses protons
(4) gains protons

Answers

Charging something electrically involves the exchange of electrons (not protons)  so we're left with choices (1) or (2).  Since the sphere is neutral and the rod is positive, there will be a distribution of positive charge.  This can only be due to a lack of electrons, since electrons are negatively charged.  Therefore, the sphere must lose electrons to the positive rod, (choice 1) leaving both with a net positive charge.  The rod will be less positive than before, as will the sphere.

For Jane to see an image, light must enter her eyes. what specifically is entering her eyes when she sees an image?

A) Matter
B) Energy
C) Color

Answers

Light is form of electromagnetic radiation. It has certain frequency and wavelength. The carriers of light are called photons. Photons have dual particle-wave properties but they are not considered to be matter.

The definition of photons excludes answer A).
All electromagnetic radiation is energy. So the B) is correct answer.
Color is perceived in our eyes as a response to different wavelengths of a light. This excludes answer C).

What is the period of a wave if the wavelength is 100 m and the speed is 200 m/s?

(a) 200,000 s

(b) 2 s

(c) 0.5 s

(d) 100 s

Answers

Uh it's c) 0.5 :), and for some reason i need to write 20 characters to explain it well, okay you need to divide speed/wavelength, that's it
It's 0.5 I thought it was 2 but I was wrong it's 0.5

A disturbance that moves through a solid, liquid, gas, or a vacuum is defined as __________.

energy, as long as matter is being transported
sound, as long as matter is not present within the disturbance
a wave, as long as matter is not being transported
a wave, as long as matter is being transported

Answers

A wave as long as matter is not being transported

Answer:

Wave

Explanation:

It is called wave.

when the disturbance moves through solid, liquid, gas and vacuum is called non mechanical wave.

The non mechanical wave do not require medium for travel. For example, light waves. they can travel through vacuum also.

Two identical parallel plate capacitors A and B connected to a battery of V volts w/ the switch S closed. The switch is now opened and the free space between the plates of the capacitors is filled w/ a dielectric of dielectric constant K. Find the ratio of the total electrostatic energy stored in both capacitors before and after the introduction of the dielectric.

Answers

The electrostatic energy stored in a capacitor with capacitance [tex]C_0[/tex], with a voltage difference V applied to it, and without dielectric, is given by
[tex]U_0 = \frac{1}{2} C_0 V^2 [/tex]
Now let's assume we fill the space between the two plates of the capacitor with a dielectric with constant k. The new capacitance of the capacitor is
[tex]C_k = k C_0[/tex]
So, the energy stored now is
[tex]U_k = \frac{1}{2}C_k V^2= \frac{1}{2}kC_0 V^2 [/tex]

Therefore, the ratio between the energies stored in the capacitor before and after the introduction of the dielectric is
[tex] \frac{U_k}{U_0}= \frac{ \frac{1}{2}kC_0 V^2 }{ \frac{1}{2} C_0 V^2}= k[/tex]

Which of the following could you do to increase the strength of an electromagnet? decrease the number of windings
decrease the electric current
change the core from wood to iron
all of the above

Answers

To INcrease the strength of an electromagnet ...

... INcrease the number of windings
... INcrease the electric current (by increasing the voltage of the battery)
... change the core from wood to iron

change the core from wood to iron

A plane, diving with constant speed at an angle of 40.9° with the vertical, releases a projectile at an altitude of 654 m. the projectile hits the ground 6.70 s after release. (a) what is the speed of the plane? (b) how far does the projectile travel horizontally during its flight? what were the magnitudes of the (c) horizontal and (d) vertical components of its velocity just before striking the ground? (state your answers to (c) and (d) as positive numbers.)

Answers

Let's solve the problem step-by-step.

A) Let's start writing the laws of motion on both x (horizontal) and y (vertical) axis. On the x-axis, it's a uniform motion with constant velocity, while on the y-axis it's an uniformly accelerated motion:
[tex]S_x(t)=v_x t[/tex]
[tex]S_y(t)=h-v_y t- \frac{1}{2} g t^2 [/tex]
where h=654 m is the initial height of the projectile, [tex]v_x[/tex] and [tex]v_y[/tex] are the initial velocities on the x- and y-axis, g=9.81 m/s^2 and t is the time. [tex]v_y[/tex] ad [tex]g[/tex] have a negative signs because they both point downward.
We can calculate the initial velocity on the y-axis by requiring that [tex]S_y(6.70 s)=0[/tex], since we know that after 6.70 s the projectile reached the ground. Therefore:
[tex]0=h-v_yt- \frac{1}{2} gt^2=654 - 6.7 v_y - \frac{1}{2} (9.81)(6.70)^2 [/tex]
from which we find
[tex]v_y=64.78 m/s[/tex]

Then we can find the magnitude of the initial velocity v using the angle with respect to the vertical [tex]\alpha=40.9^{\circ}[/tex]:
[tex]v_y = v cos \alpha[/tex]
[tex]v= \frac{v_y}{cos \alpha} =85.7 m/s[/tex]

B) Let's calculate the component of the initial velocity on the x-axis:
[tex]v_x = v sin \alpha = 85.7 m/s \cdot sin (40.9^{\circ})=56.11 m/s[/tex]
And then, we can find how far the projectile traveled horizontally by calculating Sx at t=6.70 s, when it hits the ground:
[tex]S_x(6.70 s)=v_x t = 56.11 m/s \cdot 6.7 s=375.94 m[/tex]

C) The horizontal component of the velocity does not change during the motion, since it's an uniform motion on the x-axis. Therefore, vx at t=6.7 s is the same as its initial value:
[tex]v_x (6.70 s)=v_x = 56.11 m/s[/tex]

D) Instead, vy changes during the motion since it's an accelerated motion, following the law
[tex]v_y(t) = - v_y -gt[/tex]
Using t=6.7 s, we can find the vertical velocity just before the projectile hits the ground
[tex]v_y(6.70 s)= -64.78 m/s - (9.81 m/s^2)(6.70 s)=-130.51 m/s[/tex]
Writing it with positive sign:
[tex]v_y(6.70 s) = 130.51 m/s[/tex]

How is it possible you can feel heat from the sun?

Answers

there are three ways by which we can transfer heat from one place to other

1. Conduction

In this method of heat transfer heat can be transferred from one place to other without actual movement of medium molecules. This is possible in solid conducting mediums

2. Convection

Here heat energy is carried away along with the medium molecules where medium molecules can move from one place to other while heat is transferred. It is possible in liquid and gas but not possible in solids

3. Radiation

In this mode of heat transfer we do not require any medium and here heat transferred by electromagnetic waves

So we can feel heat from sun in form of electromagnetic waves and it is the fastest way to transfer the heat also it do not require any medium

What is the most appropriate SI unit to express the speed of a cyclist in a 10-km race? km/s cm/h km/h mm/s

Answers

You sure wouldn't want something like cm/s or (yikes cm/hr). You want a reasonable number for sports usually between 0 and 100

Km / hour would be a good choice.

The next town to where I live is 25 km away. On a good day, I can make it there in about 3/4 of an hour.

Speed = 25 km / 0.75 hour = 33.3 km/hour. That's actually a little fast most of the time. But you should understand what I mean.

How long would it take for a ball dropped from the top of a 576-foot building to hit the ground? round your answer to two decimal places?

Answers

If a ball is if a ball is dropped from a 576ft building it would take about 8 seconds for it to hit the ground.

A 60 Watt light bulb runs for 120 seconds. How much energy does it use?

Answers

ENERGY = POWER X TIME
=60 X 120=7200KWh

What causes the curved path of a projectile??

Answers

the combination of initial forward velocity and downward vertical force of gravity

The curved path of a projectile, known as its trajectory, is primarily due to the influence of gravity, along with other factors such as air resistance and the rotation of the Earth.

Gravity: The dominant force acting on a projectile is gravity, which pulls the object downward toward the center of the Earth. As a projectile moves forward, gravity pulls it down, causing it to follow a curved path rather than a straight line. The motion creates a parabolic trajectory when air resistance is negligible.

Initial Velocity and Launch Angle: When a projectile is launched, it has an initial velocity and is given a specific angle with respect to the horizontal. These factors contribute to how high and how far the projectile will travel.

Air Resistance: In real-world scenarios, air resistance also plays a significant role in shaping the projectile's path. This force opposes the motion of the projectile and causes deviations from the ideal parabolic path. The effect of air resistance can be complex and often results in a more flattened trajectory.

Why is it important to make healthy choices about your diet and exercise?

Answers

I believe it's good because it benifits your body, and it helps the decisions you make. Yoru diet is important because you want to control what you eat. If you eat everything you see that is not going to be good in your adult years. Excersise is good to stay fit, and help work off that extra food you do eat. Overall it's good for your body, mind, and helps reduce the risk of hear disease and cancer. And those do play a big role.
~Deceptiøn

Final answer:

Regular exercise, combined with a healthy diet, offers a myriad of health benefits, from disease prevention to cognitive enhancement.

Explanation:

Regular physical exercise is essential in preventing various diseases such as cardiovascular disease, cancer, diabetes, and obesity. Muscle health and strength significantly improve with consistent exercise.

When combining exercise with a healthy diet, individuals are less likely to be obese and experience benefits such as improved cardiovascular health, lowered blood pressure, enhanced diabetes management, joint flexibility, and muscle strength.

Exercise not only influences physical health but also slows cognitive impairments associated with aging, showcasing the holistic benefits of staying physically active throughout life.

Which type of heat source is the cleanest?

A.open fireplace
B.wood stove
C.hot water radiant heat

Answers

c. hot water radiant heat

Answer:

option (C)

Explanation:

The source which gives the energy in form of heat is called heat source.

There are several sources which gives us heat. For example, sun, burning candle, burning coal, heater, wooden stove, etc.

Here, the cleanest source of heat energy is hot water.

what is the gravitational potential energy relative to the ground of a 1.0-kg box at the top of a 50-m building ?

Answers

''Gravitational PE is calculated as mgh where m is a mass, g is the acceleration due to gravity, and h is a perpendicular height. 
So in this case PE = 1*9.81*50 = 490.5J 
I am assuming that 50m is the height of the building.''

hope this helps

The gravitational potential energy relative to the ground of a 1.0-kg box at the top of a 50-m building is  490 Joule.

What is  gravitational potential energy?

The energy that an item has or acquires when its location changes as a result of being in a gravitational field is known as gravitational potential energy. Gravitational potential energy can be defined as an energy that has a connection to gravitational force or gravity.

Mass of the box = 1.0 kg.

Height of the box relative to the ground = 50 meter.

Acceleration due to gravity = 9.8 m/s²

Hence,  the gravitational potential energy is = Mass of the box × Height of the box × Acceleration due to gravity

= 1.0 kg ×  50 meter × 9.8 m/s².

= 490 Joule.

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Which energy transformation is represented in the diagram?

A nuclear to thermal and radiant
B nuclear to electrical and chemical
C Chemical to nuclear and radiant
D Chemical to electrical and nuclear

Answers

Answer:

A nuclear to thermal and radiant

Explanation:

Nuclear fission is the disintegration of the force that holds the nucleus of the atom together, creating two different but lighter nuclei.

In nuclear fission, it seeks to break the force of attraction or nuclear force that joins the protons and neutrons that form the nucleus of an atom. Neutrons without electric charge are used against the nucleus of the atom to produce enough excitation energy to deform the nucleus into two halves.

The nuclei obtained from nuclear fission are different and lighter than the initial nucleus. The excess energy that emerges from nuclear fission is what is known as nuclear energy.

Nuclear fission produces energy in the form of heat and other radiations releasing (ie thermal and radiation in general), in turn, other neutrons. Each generated neutron collides with the other nuclei created, producing a chain reaction.

Nuclear fission can be used for power generation through a nuclear reactor. A nuclear reactor is a facility that generates self-sustained and controlled nuclear reactions, and uses the energy released from the fission of atoms.

For example, one of the first applications of nuclear fissions used uranium atoms to produce electricity.

Instruments that produce sound from a vibrating string (suspended between two nodes) are called:

Answers

I believe the instrument is called a Chordophone. It is an instrument that produces sound from a vibrating string stretched between two points, the string may be set in motion by bowing, striking, or plucking. It is one of the four major divisions of instruments in the original Hornbostel-Sachs scheme of musical instrument classification

The instruments that produce sound from a vibrating string suspended between two nodes are called chordophones.

What is a chordophone?

A chordophone is a musical instrument that produces sound from the vibration of a stretched string. The string is typically made of metal, nylon, or gut, and it is attached to two fixed points. When the string is plucked, bowed, or struck, it vibrates and produces sound waves.

Some of the most common chordophones include: Violin, Guitar, Harp, Lute. Chordophones are a diverse group of instruments, and they come in a variety of shapes and sizes. They are played in a variety of musical genres, and they are enjoyed by people all over the world.

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Which of the following measurements is used to measure the distance between astronomical bodies?

Speed of light
Speed of sound
Speed of spacecraft
Speed of rotation of Earth

Answers

combination   of  the orbit of the earth  and the speed of light.
distances   are measured in light years.

Generally we use speed of light to measure the distance between two astronomical bodies

Because astronomical bodies are very far from each other

and we use light year as the unit of distance for large distances

1 light year is the distance covered by light in one year

so speed of light is correct option here

An electric field of 3 × 1016 is needed to create a spark in the air. If the charged particles in the field are separated by a distance of 1 mm, how many coulombs of charge are needed for a spark?

Answers

Answer:

There are 3.34 C of charge are needed to spark.

Explanation:

Given that,

Electric field, [tex]E=3\times 10^{16}\ N/C[/tex]

If the charged particles in the field are separated by a distance of 1 mm, d = 1 mm

The electric field is given by the formula as follows :

[tex]E=\dfrac{kq}{d^2}[/tex]

q is charge

[tex]q=\dfrac{Ed^2}{k}\\\\q=\dfrac{3\times 10^{16}\times (1\times 10^{-3})^2}{9\times 10^9}\\\\q=3.34\ C[/tex]

So, there are 3.34 C of charge are needed to spark.

Answer:

The correct answer is 3.

Explanation:

What is the gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building?

Answers

The gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building is 86,752.17 Joules, calculated using the formula PEg = mgh.

The gravitational potential energy (PEg) of a person or object is calculated using the formula PEg = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m/s² on Earth), and h is the height above a reference point in meters.

In the case of a 65.7 kg person standing on the roof of a 135 meter building, the gravitational potential energy can be calculated as follows:

PEg = mgh = (65.7 kg) (9.8 m/s²) (135 m) = 86,752.17 Joules

Hence, the person has a gravitational potential energy of 86,752.17 J when standing on the roof of the building.

alcohol use for can cause feel alcohol syndrome in the unborn fetus? true or false

Answers

this answer is true

Answer:

True

Explanation:

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