ANSWER QUICK 30 POINTS
What force controls the movement of the planets around the sun, holds together stars grouped in galaxies, and galaxies grouped in clusters? Thoroughly explain your answer, making sure to include an example and describe how this force keeps planets in orbit. Make sure to write at least 3-5 sentences and proper conventions (spelling, grammar, punctuation, etc.) to respond. Put all answers in your own words (pls dont just take my points :( )

Answer:

B. 90km/hr

Explanation:

The formula for finding velocity =

Displacement/time

The displacement of the car has been given to be = 1215 km West

Time it took to go from Dallas to Paso = 13.5 hours

Then velocity = 1215/13.5

= 90

Therefore velocity = 90km/hour

Option B is the correct answer to this question.

Thank you!

The experimental group and treatment group are the same group. It's just two different names for the same thing. If you apply a treatment to a group, then that's where you're performing the experiment.

For instance, if you are testing a fertilizer, then the independent variable would be "use of fertilizer or not using fertilizer". So that means the control group doesn't get any fertilizer. The dependent variable would be the heights of the plants between the two groups, so we can see if the fertilizer has an effect or not. This is the result of the experiment. So in other words, the input is the fertilizer (or no fertilizer), and the output is measuring the heights of the plants. The output is the result we analyze.

Keep in mind that the heights of the plants are likely to be randomly distributed. So this is where statistics comes into play. If the plants grow due to some random chance, and not necessarily the fertilizer, then you can use the control group to determine if that's the case or not. The control group helps you do this comparison.

As the name implies, "dependent" means it relies on something else. The height of the plant relies on if you used fertilizer or not. The independent variable is able to change without relying on any other variable.

Answer:

A

Explanation:

Answer:

property of low melting point

Explanation:

When too much current flows through the low resistance element of the fuse, the element melts and breaks the circuit

Answer:

Answers below--

Explanation:

1. F/Force

2.H/Contact force

3.A/Non-contact force

4.C/electric force

5.D/gravity

6.I(i)/magnetic force

7.J/kilogram

8.G/newton

9.B/friction

10.E/lubricant

can you please show a picture

Answer:

Gases

Solids

Liquids

Explanation:

A)The molecules are a great distance apart, moving  very rapidly, with negligible interaction. The  substance occupies all the space available.

Gases

The state of matter described above is for gases. The distances between gases are far apart and they have very weak intermolecular attraction. They have no fixed volume as they occupy any volume of space they are introduced into.

B)The molecules are only able to vibrate rapidly about  fixed positions. The substance does not need a  container to maintain its shape.

Solids

Solids have fixed shape and volume. They are held together in their fixed lattice and are only able to rapidly vibrate about their fixed positions.

C)The molecules move about amongst each other,  with attractive forces between them. The substance  does not necessarily fill its container.

Liquids

The state of matter described here are the liquids. Liquids flow amongst each other. The attractive force between them is greater than that of gases but lesser than those of solids.

Answer:

Explanation:

When the mass

m

is being accelerated with an acceleration of

a

,we can say the net force acting in the direction of acceleration is

F

=

m

a

here,it is given that only one force

F

was applied to cause this acceleration, and also given,

m

=

2

K

g

,

a

=

2

m

s

−

2

So,

F

=

2

⋅

2

=

4

N

Answer:

4N

Explanation:

given formula solution

m=2kg F=ma F=2kg×2m/s^2

a=2m/s^2 =4N

Answer:

b

Explanation:

i took the quiz

Both the transverse and longitudinal waves move faster at higher temperatures.

A wave in which the motion of the particles is perpendicular to the direction of the wave propagation is referred to as a transverse wave.

Here,

As a result of the shear stress that is produced, transverse waves are frequently observed in elastic materials.

In this situation, the oscillations are caused by the displacement of the solid particles from their relaxed state in directions perpendicular to the wave's propagation.

The wave in which the particles of the medium oscillate parallel to the direction of propagation of the wave is called a longitudinal wave.

Sound waves similarly oscillate parallel to the direction of propagation, forming the compressions and rarefactions. Hence sound waves are called longitudinal waves.

Hence,

Both the transverse and longitudinal waves move faster at higher temperatures.

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Answer:

its either A or D

Explanation:

They use foam walls in like asylums but in the movies all the bad guys say "They can't hear you the metal is too thick" so its either one of those, hope it helped

Sound absorbing foams are typically softer and more lightweight than their sound blocking counterparts. This open and flexible cell structure acts as a natural soundwave absorber and prevents noises from reverberating off hard surfaces like walls, floors and ceilings.

"A sound wave is the pattern of disturbance caused by the movement of energy traveling through a medium (such as air, water, or any other liquid or solid matter) as it propagates away from the source of the sound. The source is some object that causes a vibration, such as a ringing telephone, or a person's vocal chords."

"Sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain."

Sound is defined as vibrations that travel through air or another medium that can be heard when they reach a person's or animal's ears. Noise is defined as unwanted sound. In engineering, noise has the additional connotation of signals varying over time without meaning, whereas sound connotes meaningful signals.

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Explanation:

Given parameters:

Distance hopped  = 84m

Displacement  = 84m due east

Time  = 7s

Unknown:

Speed of kangaroo  = ?

Velocity of kangaroo  = ?

Solution:

To solve this problem,

    Speed  = [tex]\frac{distance}{time }[/tex]   = [tex]\frac{84}{7}[/tex]  = 12m/s

  Velocity  = [tex]\frac{displacement}{time}[/tex]   = [tex]\frac{84}{7}[/tex]   = 12m/s due east

Answer:

[tex]F=683.790939[/tex]N

Explanation:

From the Question we are told that

Earth mass [tex]m_1= 5.98 * 10^2^4 kg[/tex]

Students mass [tex]m_2=70kg[/tex]

Distance of student from earth center Radius [tex]r=6.39 * 10^6 m[/tex]

Generally the equation for Force of attraction b/w the earth and the boy is mathematically given by

 [tex]F=\frac{Gm_1m_2}{r^2}[/tex]

 [tex]F=\frac{6.67.10^-^1^1*( 5.98 x 10^2^4)(70)}{(6.39 *10^6)^2}[/tex]

Therefore the force of attraction b/w the student and the earth is

 [tex]F=683.790939N[/tex]

 [tex]F\approx 684N[/tex]

Answer:

[tex]6.18\:\mathrm{m/s}[/tex]

Explanation:

The momentum of an object is given by [tex]p=mv[/tex].

Plugging in values, we have:

[tex]218=35.2v,\\v=\frac{218}{35.2}=\fbox{$6.18\:\mathrm{m/s}$}[/tex].

Answer:

1 m/s

Explanation:

This is because, everybody in the plane including the person walking is moving at the speed of the plane which is 200 m/s. Now, when the person starts to walk with a speed of 1 m/s, his relative velocity to the other passengers is 1 m/s since he is already moving at the speed of the plane before starting to walk.

His velocity relative to the ground V' = velocity of plane relative to ground, V + velocity of person relative to plane, v

V = 200 m/s and v = 1 m/s

So, V' = 200 m/s + 1 m/s = 201 m/s

Since the velocity of the other passengers is the velocity of the plane, V = 200 m/s. The velocity of the person traveling in reference to the other people on the plane is V" = V' - V = 201 m/s - 200 m/s = 1 m/s

Answer:

Explanation:

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

force = mass × acceleration

From the question we have

force = 2 × 9.8

We have the final answer as

Hope this helps you

Answer:

90m/s

Explanation:

Given parameters:

Acceleration  = 10m/s²

Time of fall  = 9s

Unknown:

Final velocity  = ?

Solution:

We can assume that the cart falls from rest.

   Initial velocity  = 0m/s

Using

        v  = u + gt

v is the final velocity

u is the initial velocity

g is the acceleration due to gravity

t is the time

       v  = 0 + 10 x 9  = 90m/s

Answer:

90m/s

Explanation:

Answer:

Superficial anatomy.

Explanation:

Superficial anatomy can be defined as the physical examination of the external parts of a living organism such as ankle, nose, skin, knee, toes, fingers, cornea etc.

Hence, superficial anatomy is also popularly referred to as surface anatomy.

In this scenario, a patient arrives at an emergency room complaining of pain in her ankle. The nurse examines the patient’s ankle, looking for skin discoloration or swelling. The nurse is relying mostly on his knowledge of superficial anatomy by studying or examining the patient's ankle for any sign of decoration or swelling on the skin.

Answer:

Explanation:

distance (km)

a) As near as I can tell from the graph, the distance travelled was 4km

b) I would answer 40 minutes, but don't be surprised if your instructor says 30 minutes.

c) The average speed is 4 km/40 minutes = 0.1 km/minute

Answer:

VR = [tex]\frac{Radius of the wheel}{Radius of the axle}[/tex]

Explanation:

Velocity ratio (VR) of a machine is a term that compares the distance moved by effort put into the machine to the distance moved by the load.

A wheel and axle is a device for lifting of a load through a height. It is made up of two circular parts called wheel and axle. Its velocity ratio (VR) can be determined by:

VR = [tex]\frac{Radius of the wheel}{Radius of the axle}[/tex]

For a practical wheel and axle, the diameter of the wheel is greater than the diameter of the axle.

Answer: 74.7 N

Explanation:

Both approaches yield the same result: the magnitude of the applied force is approximately 74.7 N, and its direction is forward.

To solve this problem, we'll use two different approaches: Newton's second law and the work-energy principle.

Approach 1: Newton's Second Law

Newton's second law states that the force applied to an object is equal to the change in momentum of the object over time.

Step 1: Calculate the initial momentum (pinitial) of the curling rock.

pinitial = m * vinitial

pinitial = 18 kg * 0 m/s (since it's initially stationary)

pinitial = 0 kg m/s

Step 2: Calculate the final momentum (pfinal) of the curling rock.

pfinal = m * vfinal

pfinal = 18 kg * 8.3 m/s

pfinal = 149.4 kg m/s

Step 3: Calculate the change in momentum (Δp).

Δp = pfinal - pinitial

Δp = 149.4 kg m/s - 0 kg m/s

Δp = 149.4 kg m/s

Step 4: Calculate the magnitude of the applied force (Fapplied).

Fapplied = Δp / Δt

Fapplied = 149.4 kg m/s / 2.0 s

Fapplied = 74.7 N

Step 5: Determine the direction of the applied force.

The direction of the applied force is forward since the curling rock is released with a velocity of 8.3 m/s forward.

So, according to Newton's second law, the magnitude of the applied force is 74.7 N, and its direction is forward.

Approach 2: Work-Energy Principle

The work-energy principle states that the work done on an object is equal to the change in its kinetic energy.

Step 1: Calculate the initial kinetic energy (KEinitial) of the curling rock.

KEinitial = 0.5 * m * [tex]vinitial^2[/tex]

KEinitial = 0.5 * 18 kg * (0 [tex]m/s)^2[/tex]

KEinitial = 0 J

Step 2: Calculate the final kinetic energy (KEfinal) of the curling rock.

KEfinal = 0.5 * m * [tex]vfinal^2[/tex]

KEfinal = 0.5 * 18 kg * (8.3 [tex]m/s)^2[/tex]

KEfinal = 0.5 * 18 kg * 69.0 [tex]m^2/s^2[/tex]

KEfinal = 621.0 J

Step 3: Calculate the work done on the curling rock (W).

W = KEfinal - KEinitial

W = 621.0 J - 0 J

W = 621.0 J

Step 4: Calculate the magnitude of the applied force (Fapplied) using the work done.

Fapplied = W / d

Fapplied = 621.0 J / 2.0 s

Fapplied = 310.5 N

Step 5: Determine the direction of the applied force.

The direction of the applied force is forward since the curling rock is released with a velocity of 8.3 m/s forward.

So, according to the work-energy principle, the magnitude of the applied force is 310.5 N, and its direction is forward.

Both approaches yield the same result: the magnitude of the applied force is approximately 74.7 N, and its direction is forward.

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Answer:

-5 N of force

Explanation:

Hope it helps!

Answer:

B

Explanation:

objects are conductors with unbalanced charges

Answer:

D & A

Explanation:

Answer:

From the poem Black woman what does it mean by Savannah stretching to clear horizons, Savannah shuddering beneath the East wind's eager caresses.​

Explanation:

Answer:

False

Explanation:

Electromagnetic waves are transverse waves. That means that the electric and magnetic fields oscillate in a plane that is perpendicular to the direction of wave propagation.

Answer:

false electromagnetic waves are not classified as longitudinal waves

Answer:

[tex]h_m=5 \ m[/tex]

Explanation:

Projectile Motion

It's the type of motion that experiences an object projected near the Earth's surface and moves along a curved path under the action of gravity.

The maximum height hm is reached when the vertical component of the velocity is 0. It can be calculated as follows:

[tex]\displaystyle h_m=\frac{v_o^2\cdot \sin^2\theta}{2g}[/tex]

Where:

vo = initial speed of the object

θ   = initial launch angle

g   = acceleration of gravity ([tex]10\ m/s^2[/tex])

The object is projected with an angle of θ=30° and an initial speed of vo=20 m/s. The maximum height is:

[tex]\displaystyle h_m=\frac{20^2\cdot \sin^2 30^\circ}{2*10}[/tex]

[tex]\displaystyle h_m=\frac{400\cdot 0.5^2}{20}[/tex]

[tex]\boxed{h_m=5 \ m}[/tex]

Answer:

Chemical energy is converted to thermal energy and electrical energy.

Explanation:

Answer:

Which identifies the energy transformations that take place in Anna’s body as this process takes place?

Mechanical energy is converted to kinetic energy, which is then converted to potential energy.

*******Chemical energy is converted to thermal energy and electrical energy. *******CORRECT*******

Electrical energy is converted to chemical energy and thermal energy.

Mechanical energy is converted to potential energy which is then converted to kinetic energy.

Explanation:

Feb 2021 Edge 100% test

Answer:

Answer:

50 Mph.

Explanation:

According to the National Severe Storms Laboratory, winds can really begin to cause damage when they reach 50 mph. But here’s what happens before and after they reach that threshold, according to the Beaufort Wind Scale (showing estimated wind speeds): - at 19 to 24 mph, smaller trees begin to sway.