In the figure calculates the acceleration of the block friction not today

In The Figure Calculates The Acceleration Of The Block Friction Not Today

Answers

Answer 1

Answer:

A fan pushes hot air out of a vent and into a room. The hot air displaces cold air in the room, causing the cold air to move closer to the floor.

The hot air displacing the cold air is an example of  transfer by

Explanation:


Related Questions

An object has a mass of 5 kg. What force is needed to accelerate it at 6 m/s?

Answers

Answer:30N

Explanation:

Mass=5kg

Acceleration=6m/s^2

Force=mass x acceleration

Force=5 x 6

Force=30N

Answer:

30n

Explanation:

Mass=5kg

Acceleration=6m/s^2

Force=mass x acceleration

Force=5 x 6

Force=30N

What happens if you move a magnet near a could of wire

Answers

Answer:

The wire would stick to the magnet????????????????????????

Explanation:

A fisherman fishing from a pier observes that the float on his line bobs up and down, taking 2.4 s to move from its highest point to its lowest point. He also estimates that the distance between adjacent wave crests is 48 m. What is the speed of the waves going past the pier?Immersive Reader

Answers

Answer:

  v = 10 m / s

Explanation:

For this exercise we will use the relationship between the speed of a wave and its frequency and wavelength

         v = λ f

the wavelength is the distance at which the wave repeats, in this case the distance between the two ridges λ = 48 m.

the frequency is the number of oscillations per unit of time, it is also the inverse of the period which is the time in a complete oscillation, in this case they give us the time of half a period, ½ T = 2.4 s

   T = 4.8 s

the frequency is

        f = 1 / T

        f = 1 / 4.8

        f = 0.2083 Hz

let's calculate

        v = 0.2083 48

        v = 10 m / s

Q8.(10 points) a)When you cough,the radius of your trachea (windpipe) decreases,affecting the speed of the air in the trachea. If 0 r is the normal radius of the trachea, the relationship between the speed S of the air and the radius r of the trachea during a cough is given by a function of the form 2 0 S r ar r r ( ) ( ) = − , where a is positive constant. Find the radius r for which the speed of the air is greatest

Answers

Answer:

[tex]\bf{r=\frac{2r_o}{3}}[/tex] is greatest

Explanation:

Given:

[tex]S(r)=ar^2(r_{o}-r)[/tex]

[tex]\frac{ds}{dr}=2ar(r_{o}-r)+ar^2(-1)[/tex]

[tex]\frac{ds}{dr}=2ar_{o}-2ar^2-ar^2[/tex]

[tex]\frac{ds}{dr}=2ar_{o}-3ar^2[/tex]

Substitute [tex]\frac{ds}{dr} = 0[/tex], so

[tex]2ar_{o}-3ar^2=0[/tex]

Then, get the common value from the equation.

[tex]ra(2r_{o}-3r) = 0[/tex]

[tex]\bf{r=0}\\r=\frac{2r_{o}}{3}[/tex]

[tex](\frac{d^2s}{dr^2})_{r=0}=2ar_{o}-6ar[/tex]

[tex](\frac{d^2s}{dr^2})_{r=0}=2ar_{o} >0\;and, \\(\frac{d^2s}{dr^2})_{r}=\frac{2r_o}{3} <0[/tex]

So, the speed of the air is greatest.

[tex]\bf{r=\frac{2r_o}{3}}\;is\;greatest[/tex]

A landscaper is shopping for landscaping materials. She wants to use materials through which water flows easily.
Which materials should she choose? Select three options.
clay
gravel
granite
rocks with cracks
loosely packed soil
Next
Mark this and retum
Save and Exit
Submit

Answers

Answer:

He needs clay gravel and rocks with cracks

7. A light source has two spectral components, one with unknown wavelength and the other with wavelength 620 nm. When light from the source is incident to a thin rectangular slit, a screen behind the slit shows the second diffraction minimum from the 620 nm component at the exact same location as the third diffraction minimum from the unknown wavelength component. What is the unknown wavelength?

Answers

Answer:

Explanation:

Problem relates to diffraction of light . Location for 2 nd diffraction minima is

[tex]x=2\times\frac{\lambda D}{d}[/tex]  where λ is wavelength of light , D is distance of screen , d is slit width .

Puting the values

[tex]x=2\times\frac{620D}{d}[/tex]

for unknown wavelength , position of third diffraction is

[tex]x=3\times\frac{\lambda D}{d}[/tex]

from these two equations

[tex]x=2\times\frac{620D}{d}[/tex][tex]=3\times\frac{\lambda D}{d}[/tex]

λ = 413.33 nm .

A piston with stops containing water goes through an expansion process through the addition of heat. State 1 the pressure is 200 kPa and the volume is 2 m3. After half of the heat has been delivered the piston hits the stops corresponding to a volume of 5 m3. After all the heat has been delivered, state 2, the pressure is 1000 kPa with the piston resting on the stops. What is the work?

Answers

Answer:

The work will be "600 kJ/kg".

Explanation:

(1-a) ⇒ Constant Pressure

(a-2) ⇒ Constant Volume

The given values are:

In state 1,

Pressure, P₁ = 200 kPa

Volume, V₁ = 2m³

In state 2,

Pressure, P₂ = 1000 kPa

Volume, V₁ = 5m³

Now,

In process (1-a), work will be:

W₁₋ₐ = P₁(Vₐ - V₁)

On putting the values, we get

⇒ W₁₋ₐ = 200(5-2)

⇒         = 200(3)

⇒         = 600 kJ/kg

In process (a-2), work will be:

Wₐ₋₂ = 0

∴ (The change in the volume will be zero.)

So,

Total work = (W₁₋ₐ) + (Wₐ₋₂)

⇒                    = 600 + 0

⇒                    = 600 kJ/kg

In a double-slit interference experiment, which of the following actions (perhaps more than one) would cause the fringe spacing to increase? (a) Increasing the wavelength of the light. (b) Increasing the slit spacing. (c) Increasing the distance to the viewing screen. (d) Submerging the entire experiment in water

Answers

Answer:

The correct option is a , c

Explanation:

Generally the  fringe spacing is mathematically defined as

        [tex]y = \frac{m \lambda D}{d}[/tex]

Where y is the fringe spacing

           m is the order of the fringe

           [tex]\lambda[/tex] is the wavelength

           D is the distance between the slit and the screen

           d is the distance between the slit

Now in order to increase the fringe spacing can do the following

Increase the wavelength increase the distance from the slit to the screen Decrease the distance between the slit          

The following action would increase the fringe spacing because the from the question these parameters are directly proportional to the fringe spacing

3. The current in a flashlight powered by 4.5 Volts is 0.5 A. What is the power delivered to the flashlight?
4.If the flashlight in the previous problem is left on for 3 minutes, how much electric energy is delivered to the bulb?

Answers

Answer:

Question 3: 2.25 watts

Question 4: 405 joules

Explanation:

question 3:

Current =0.5 amps

Voltage =4.5 volts

Power= current x voltage

Power=0.5 x 4.5

power=2.25 watts

Question 4

Current =0.5 amps

Voltage =4.5v

Time=3 minutes

Time =3x60

Time =180 seconds

Energy=current x voltage x time

Energy =0.5 x 4.5 x 180

Energy =405 joules

very thin 15.0 cm copper bar is aligned horizontally a l ong the east - west direction. If it moves horizontally from south to north at 11.5 m/s in a vertically upward magnetic field of 1.22 T, A) what potential difference is induced across its ends, and B) which end (east or west) is at a higher potential

Answers

Answer:

2.10 V

Explanation:

To find the potential difference across the ends of the bar, you take into account that when the bar moves with speed v, in a constant magnetic field, the charges in the wire feels a magnetic force that separate the opposite charges, generating an induced potential difference given by the following formula:

[tex]\epsilon=vBL[/tex]   (1)

v: speed of the bar = 11.5 m/s

B: magnitude of the magnetic field = 1.22 T

L: length of the bar = 15.0cm = 0.15m

You replace the values of v, B and L in the equation (1):

[tex]\epsilon=(11.5m/s)(1.22T)(0.15m)=2.10\ V[/tex]

hence, the induced potential difference is 2.10 V

Consider a disk, having mass and radius , that spins rapidly about an axle at its center, spinning with an angular velocity . The disk's axle is connected by a thin, massless rod of length to a central pivot. The end of the massless rod is fixed in place at that pivot, but it can freely rotate in all directions. 1) If the disk's mass and radius were each doubled, while keeping the other quantities (, , and ) fixed, by what factor would the rate of precession change? I.e., what is ?

Answers

Answer:

1/2

Explanation:

Solution:-

- The torque ( T ) induced at the pivotal point of the massless rod-disk assembly is given by:

                           T = M*g*r*sin ( θ )

Where,

              M: The mass of the disk

              r: the radius of the disk

              θ: The precession angle

- The rate of change in angular momentum of the disk ( dL / dt ) is due to the induced torque ( T ) given by:

                          dL / dt = M*g*r*sin ( θ )

Hence,

                          dL = M*g*r*sin ( θ ). dt  ... Eq1

- The change in precession angle ( dθ ) is a orthogonal component of change in angular momentum ( dL ) :

                         dθ = dL / ( L*sin ( θ ) ) ... Eq2

- Combine Eq1 and Eq2:

                         dθ = M*g*r*sin ( θ ). dt / ( L*sin ( θ ) )

                         dθ/dt = M*g*r / L   ... Eq3

Where,

- The angular momentum of the disk is given by the product of moment of inertia ( I ) and angular velocity ( w ):

                     

                      [tex]L = I*w\\\\L = \frac{1}{2}*M*r^2*w[/tex]

- Substitute the relationship of angular momentum of disk ( L ) into Eq3:

                      dθ/dt = M*g*r / 0.5*M*r^2*w                

- Hence, the rate of change of precession ( dθ/dt ) is given by:

                      dθ/dt = 2*g / r*w  

- If we double the mass ( M to 2M ) there is no effect on the rate of change of precession ( dθ/dt ). However, if we double the radius of the disk the rate of precession ( dθ/dt ) is halved due to the inverse relationship between the rate of precession ( dθ/dt ) and radius of the disk.

Answer:The factor of change would be ( 1 / 2 ) of the initial rate of change in precession.

                     

                         

The spaceship Lilac, based on the Purple Planet, is 721 m long when measured at rest. When the Lilac passes Earth, observers there measure its length to be 661 m. At what speed v is the Lilac moving with respect to Earth? Express your answer as a multiple of the speed of light c.

Answers

Answer:

The speed of Lilac is 0.399c.

Explanation:

The size of spaceship Lilac measured at the rest position = 721 m  

The length of  Lilac when it passes Earth = 661 m

Below is the calculation for speed at which Lilac is moving.

Here, L, is the length of spaceship when it passes the earth.

[tex]L_{0}[/tex] is the length of spaceship measured at rest.

V is the speed.

[tex]L = L_{0}\sqrt{1-\frac{v^{2}}{c^{2}}} \\[/tex]

[tex]1-\frac{v^{2}}{c^{2}} = \left ( \frac{L}{L_{0}} \right )^{2} \\[/tex]

[tex]\frac{v}{c} = \sqrt{1-\left ( \frac{L}{L_{0}} \right )^{2}} \\[/tex]

[tex]\frac{v}{c} = \sqrt{1-\left ( \frac{661}{721} \right )^{2}} \\[/tex]

[tex]v = 0.399c[/tex]

Minority group

A shared identity based on

cultural elements such as

heritage, language, and

religion

Ethnicity

A socially constructed

group of people who share

physical characteristics

that are considered

significant by a society

and that are used to

distinguish them from

other groups

Majority group

People who are singled

out for unequal treatment

and who regard

themselves as objects of

collective discrimination

Race

A group's subset that

consists of more than half

of the entire group's

members

Answers

Answer:

Minority group - People who are singled  out for unequal treatment  and who regard  themselves as objects of  collective discrimination.

Ethnicity - A shared identity based on  cultural elements such as  heritage, language, and  religion.

Majority group - A group's subset that  consists of more than half  of the entire group's  members.

Race - A socially constructed  group of people who share  physical characteristics  that are considered  significant by a society  and that are used to  distinguish them from  other groups.

Explanation:

To better understand the above-mentioned definitions we would use some examples:

Elder people can be considered as a minority group in the United States because of their reduced status as a consequence of popular discrimination and prejudice against them. In contrast to them, young men consisting of more than half the population in the age category is an example of the majority group.

Groups of people like Hispanic Americans, Jews, Italian America, Irish are some examples of people belonging to different ethnic backgrounds residing in the U.S.

African Americans who are distinguished based on their skin color is an example of race.

A firearms company is testing a new model of rifle by firing a 7.50-g lead bullet into a block of wood having a mass of 17.5 kg. The bullet embeds into the block and the collision generates heat. As a consequence, the temperature rises by 0.040°C, as measured with a high-precision thermometer. Assuming that all the kinetic energy of the bullet goes into heating the system, what is the bullet’s speed when it enters the block? The initial temperatures of bullet and wooden block can be considered identical and the specific heats of lead and wood are cPb = 130 J/(kg ⋅ C°) and c wood = 1700 J/(kg ⋅ C°), respectively.

Answers

Answer:

Explanation:

Let the bullets speed be V .

Kinetic energy = 1/2 mV² where m is mass of bullet

This energy is converted into heat Q which raises the temperature of target by Δ T .

Q = mc Δ T  , m is mass , c is specific heat and Δ T is rise in temperature .

heat absobed by bullet

= .0075 x 130 x .040

= .039 J

heat absorbed by block of wood

= 17.5 x 1700 x .04

= 1190 J

Total heat absorbed

= 1190.039 J

So kinetic energy = heat absobed

= 1/2 x .0075 x V² = 1190.039

V² = 317343.73

V  = 563.33 m /s

What is the major difference between herbal and conventional medicines

Answers

Most importantly, the main difference between herbal medicines and conventional medicines is that herbal medicines each contain a combination of chemicals, as opposed to a single pharmacologically active substance.

use the formula P=IV to detine how much current is a 120-watt light bulb is connected to a 120-V outlet

Answers

Answer:

1 A

Explanation:

P = IV

120 W = I (120 V)

I = 1 A

(20) A rocket is launched vertically. At time t = 0 seconds, the rocket’s engine shuts down. At the time, the rocket has reached an altitude of 500m and is rising at a velocity of 125 m/s. Gravity then takes over. The height of the rocket as a function of time is h(t)=-9.8/2 t^2+125t+500,t>0. Using your function file from HW2A: Generate a plot of height (vertical axis) vs. time (horizontal axis) from 0 to 30 seconds. Include proper axis labels. Find the maximum height and the time at which it occurs: Analytically, showing your steps and equations. This part should be done entirely in the write-up: no coding Using the data cursor on the plot. Using the MAX function on your data from part (a) Using FMINSEARCH on your m file Comment on the differences between the methods. How closely does each method match the "true" (analytical) value? Find the time when the rocket hits the ground: Analytically, showing your equations. This part should be done entirely in the write-up: no coding Using the data cursor on the plot. Using FZERO on your m file Comment on the differences between the methods in each of part (B) and (C). How closely does each method match the "true" (analytical) value? Use a quantitative comparison to make your argument.

Answers

Answer:

Explanation:

Given that,

h(t) = -9.8t² / 2 + 125t + 500

for t > 0.

At t = 0, the rocket is at height h = 500m, at a velocity of Vo = 125m/s.

We want to find the maximum height reached by rocket

Using mathematics maxima and minima

let find the turning point when dh/dt = 0

dh/dt = -9.8t + 125

dh / dt = 0 = -9.8t + 125

9.8t = 125

t = 125 / 9.8

t = 12.76s

Let find the turning point to know if this time t = 12.76 is maximum or minimum point

Let find d²h / dt²

d²h / dt² = -9.8

Since, d²h/dt² < 0, then, at t = 12.76s is the maximum points.

Then, the maximum height reached is

h =  -9.8t² / 2 + 125t + 500

h =  -9.8(12.76)² / 2 + 125(12.76) + 500

h = -797.80 + 1595 + 500

h = 1297.2 m

The maximum height reached is 1297.2 m

From the attachment, the maximum height is 1297.2m at t = 12.76sec.

Comment, the result are the same for both the analysis aspect and the graphical aspect.

Geologists have divided rocks into three different categories based on ______

Answers

How they are formed

A skydiver just after leaping out of an airplane is it isinertial frames of reference or not?

Answers

Answer:

He starts accelerating until he reaches terminal speed. (Or the maximum velocity attainable by an object)

Explanation:

A brick is dropped from a high scaffold. a. What is its velocity after 4.0s ?

b. How far does the brick fall during this time ?

Answers

Answer:

A: 1.962

B: 3.924

Explanation:

g = G *M /R^2

g = 9.807*M/R^2 the gravitational constant of ground level on earth is about 9.807

g = 9.807*5lbs/R^2 the average brick is about 5 pounds.

g = 9.807*5*10^2.   I'm assuming the height is around ten feet to help you out.

with these numbers plugged in you get an acceleration of 0.4905 a final velocity after 4 seconds 1.962. It's height fallen after 4 seconds is 3.924.

( M = whatever the brick weighs it's not specified in the question)

(R = the distance from the ground or how high the scaffold is)

(hopefully you can just plug your numbers in there hope this helps)

Visible light travels in air, which has an index of refraction of 1.0. It is incident on plastic which is covered by a coating (such that light hits the coating before the plastic). The coating has an index of refraction of 1.6 and is 0.50 microns thick. The ray reflected off the air-coating interface and the ray reflected off the coating-plastic interface experience interference. What frequencies could the light be

Answers

Answer:

  λ = 0.64 10⁻⁶ m = 640 nm

Explanation:

The two reflected rays experience constructive interference, if we can see them, so we can one condition for interference, but let's see two phenomena that occur

* A ray when it is reflected by a surface of major spare part index has a phase change of 180º, these passes at the air-plastic interface

* A ray when passing a material with a refractive index changes its wavelength

       λ= λ₀ / n

taking into account these facts the condition in constructive interference is

             2 n t = (m + ½) λ

             λ= 2 n t / (m + ½)

if we suppose that we have the first inference m = 0

            λ = 2 1.6 0.5 10⁻⁶ (0 + ½)

            λ = 3.2 10⁻⁶ m

this wavelength is in the infrared

suppose an interference of m = 1

          λ = 1.6 10⁻⁶ / (1 + 1/2)

          λ = 1.06 10-6 m

m = 2

         λ = 1.6 10⁻⁶ / (2 + 1.5)

         λ = 0.64 10⁻⁶ m

this wavelength corresponds to the visible range (640 nm) orange

Which is a characteristic of diatoms?
A)whip-like tail
B)heterotrophic
C)multicellular
D)glass-ive cell wall

Answers

Answer:

b

Explanation:

Answer:

The correct answer is D, diatoms have glass-like cell walls.

Explain how an electrical current is produced.

Answers

Electric current can be generated by moving a metal wire through a magnetic field It is also different than static electricity, which is the accumulation of charges on a surface. Electric generators rotate a coil of wires through a magnetic field.

Answer:electric current can be generated by moving a metal wire through a magnetic field .electric current can also be produced by batteries

Explanation:

electric current can be generated by moving a metal wire through a magnetic field.this method is applicable in electric generators.

Electric current can also be generated by connecting metal wires to batteries.

The Palo Verde nuclear power generator of Arizona has three reactors that have a combined generating capacity of 3.937×109 W . How many years would it take the Palo Verde nuclear power generator to produce the same amount of energy as the Sun does in one day? The energy generation rate, or luminosity, of the Sun is 3.839×1026 W

Answers

Answer:

t = 2.68 x 10¹⁴ years

Explanation:

First we need to find the amount of energy that Sun produce in one day.

Energy = Power * Time

Energy of Sun in 1 day = (3.839 x 10²⁶ W)(1 day)(24 hr/1 day)(3600 s/ 1 hr)

Energy of Sun in 1 day = 3.32 x 10³¹ J

Now, the time required by the nuclear power generator, in years, will be:

Energy of power generator = Energy Sun in 1 day = 3.32 x 10³¹ J

3.32 x 10³¹ J = Power * Time

3.32 x 10³¹ J = (3.937 x 10⁹ W)(t years)(365 days/1 year)(24 hr/1 day)(3600 s/ 1 hr)

t = 3.32 x 10³¹ /1.24 x 10¹⁷

t = 2.68 x 10¹⁴ years

The greater the distance between two objects in space, the _______ their gravitational

Answers

Answer is Weaker. If it is talking about the objects' gravitational forces.

19
Which gas is the most abundant greenhouse gas?
A.
ozone
B.
chlorofluorocarbon
C.
carbon dioxide
OD.
methane
E.
water vapor
Reset
Next

Answers

Carbon dioxide is the most abundant greenhouse gas in the atmosphere.

Answer:C

Explanation:

Carbon dioxide is the most abundance greenhouse gas in The atmosphere.

Under electrostatic conditions, the electric field just outside the surface of any charged conductor

A. is always zero because the electric field is zero inside conductors
B. can have non zero components perpendicular to and parallel to the surface of the conductor
C. is always perpendicular to the surface of the conductor
D. is always parallel to the surface
E. is perpendicular to the surface of the conductor only if it is a sphere, a cylinder, or a flat sheet.

Answers

Answer:

C. is always perpendicular to the surface of the conductor

Explanation:

On a charged conductor , electric charge is uniformly distributed on its surface . The lines of forces are also uniformly  distributed on all directions . They repel each other so they emerge perpendicular to the surface so that they do nor cut each other and at the same time they remain at maximum distance from each other.

A cylindrical specimen of some metal alloy having an elastic modulus of 108 GPa and an original cross-sectional diameter of 3.7 mm will experience only elastic deformation when a tensile load of 1890 N is applied. Calculate the maximum length of the specimen before deformation if the maximum allowable elongation is 0.45 mm.

Answers

Answer:

L= 276.4 mm

Explanation:

Given that

E= 180 GPa

d= 3.7 mm

F= 1890 N

ΔL= 0.45 mm

We know that ,elongation due to load F in a cylindrical bar is given as follows

[tex]\Delta L =\dfrac{FL}{AE}[/tex]

[tex]L=\dfrac{\Delta L\times AE}{F}[/tex]

Now by putting the values in the above equation we get

[tex]L=\dfrac{0.45\times 10^{-3}\times \dfrac{\pi}{4}\times (3.7\times 10^{-3})^2\times 108\times 10^9}{1890}\ m[/tex]

L=0.2764 m

L= 276.4 mm

Therefore the length of the specimen will be 276.4 mm

In later years, motors improved and could be run directly from a 60 Hz power supply. As a result, 25 Hz power systems shrank and disappeared. However, there were many perfectly-good working 25 Hz motors in factories around the country that owners were not ready to discard. To keep them running, some users created their own 25 Hz power in the plant using motor-generator sets. A motor generator set consists of two machines connected on a common shaft, one acting as a motor and the other acting as a generator. If the two machines have different numbers of poles but exactly the same shaft speed, then the electrical frequency of the two machines will be different due to Equation (3-34). What combination of poles on the two machines could convert 60 Hz power to 25 Hz power?

Answers

Answer:

as in motor generaror are connected to same shaft then both machines are working with same speed

but number of poles are different with same speed means both machines are working with different frequencies

we know

frequency F = N*P/120

speed N = 82120F/P

given

motor speed = generator speed

120F1/P1 = 120F2/P2

F1/P1 = F2/P2

output frequency is 25 which is obtained from generator so F2=25

input frequency is 60 which is given to motor soF1=60

60/P1 = 25/P2

60/25 = P!/P2

P1/P2 = 12/5

multiply and divided by 2 becuase poles are even

P1/P2 = 12*2/5*2

=24/10

P1= 24 poles a

P2 =10 poles we get 25 hz frequency from 60 hz frequency

Two astronomers are discussing supernovas. Dr. Frank says, "Research has established that if a supernova occurs within ten light-years of the Earth, then life on Earth will be destroyed." Dr. Harris says, "Research has also established that either a supernova will not occur within ten light-years of the Earth or life on Earth will not be destroyed." Is it possible that both astronomers are correct? If so, what can we determine about the occurrence of a supernova?

Answers

Answer:

Supernovae produce intense flashes of light that can last from several weeks to several months. They are characterized by a rapid increase in light intensity until reaching an absolute magnitude greater than the rest of the galaxy. Subsequently, its brightness decreases more or less smoothly until it disappears completely.

Explanation:

A team of international astronomers discovered that if the supernovae were found at a distance of 50 light years from Earth, they could cause the mass extinction of living things, according to an article published in the Astrophysical Journal.

"Until recently, our colleagues believed that the 'range' of supernovae was about 25 light years. We were of the opinion that they did not take into account a number of factors and that it is actually about 50 light years," Adrian said. Melott, from the University of Kansas at Lawrence (USA).

 The unusually high power of cosmic rays in the atmosphere, according to Melott, results in an increase in the "damage radius" of supernovae. According to the researcher, supernova explosions are capable of destroying life within a radius of 50 light years and not 10 or 25 light years, as previously thought.

Other Questions
Which items are found only in plant cells?1, chlorophyll2, chloroplasts3, nucleus4, cytoplasm5, cell membrane6,cell wall7, cellulose Es el valor que est intimamente ligado con la paz Which of the following is the healthiest type of carbohydrate?A Bread made with white flour B Rice made with whole grains C Cereal made with refined grains D White rice How to do the problem and what the answer is this thing is due today(30 points!) Everybody in the United States has heard the song about the star-spangled banner. Nearly everybody has sung it. It was written by Francis Scott Key.Key was a young lawyer. In the War of 1812 he fought with the American army. The British landed soldiers in Maryland. At Bladensburg they fought and beat the Americans. Key was in this battle on the American side.After the battle the British army took Washington, and burned the public buildings. Key had a friend who was taken prisoner by the British. He was on one of the British ships. Key went to the ships with a flag of truce. A flag of truce is a white flag. It is carried in war when one side sends a message to the other.When Key got to the British ships, they were sailing to Baltimore. They were going to try to take Baltimore. The British commander would not let Key go back. He was afraid that he would let the Americans know where the ships were going.Key was kept a kind of prisoner while the ships attacked Baltimore. The ships tried to take the city by firing at it from the water. The British army tried to take the city on the land side.The ships did their worst firing at night. They tried to take the little fort near the city.Key could see the battle. He watched the little fort. He was afraid that the men in it would give up. He was afraid that the fort would be broken down by the cannon balls.The British fired bomb-shells and rockets at the fort. When these burst, they made a light. By this light Key could see that the little fort was still standing. He could see the flag still waving over it. He tells this in his song in these words:"And the rocket's red glare, the bombs bursting in airGave proof through the night that our flag was still there."But after many hours of fighting the British became discouraged. They found that they could not take the city. The ships almost ceased to fire.Key did not know whether the fort had been knocked down or not. He could not see whether the flag was still flying or not. He thought that the Americans might have given up. He felt what he wrote in the song:"Oh! say, does that star-spangled banner yet waveO'er the land of the free, and the home of the brave?"When the break of day came, Key looked toward the fort. It was still standing. There was a flag flying over it. It grew lighter. He could see that it was the American flag. His feelings are told in two lines of the song:"Tis the star spangled banner, oh, long may it waveO'er the land of the free, and the home of the brave!"Key was full of joy. He took an old letter from his pocket. The back of this letter had no writing on it. Here he wrote the song about the star-spangled banner.Which is the best summary statement for this passage?A)Francis Scott Key was kept as a kind of prisoner on a British ship bombing Baltimore.B)Francis Scott Key was a young lawyer who fought in the War of 1812 with the American army.C)The British soldiers became discouraged when they were unable to take the city of Baltimore.D)Francis Scott Key used the battle for Baltimore as inspiration for writing "The Star-Spangled Banner. WILL GIVE BRANLIEST!!!! 20 POINTS!!!! BLESS YOUR GRADES!!3. Which two substances move through an ecosystem in sedimentary cycles?A) phosphorous and oxygenB) phosphorous and sulfurC) sulfur and carbon Que es lo que critica cadalso de los falsos eruditos? How might geographical features impact the way a government is organized? A. Culture can spread throughout the country via geographical features. B. The frequency of geographic features determines the style of government. C. Natural features can serve as borders between political units. D. The differences in natural features can create an unstable government. What could Congress NOT do under the Articles? for a special 16 sided die, what is the theoretical probability for rolling a number less than 9? What was the impact of disarming the Iraqi Army by the U.S.?It led to many professional soldiers joining the insurgency and ISISIt created a sense of security for the Iraqi people because the army was brutalIt led to a civil war in SyriaIt led to an economic depression in Iraq What are the zeros of the quadratic function represented by this graph? Language Arts Help Please!I need 2 actions that increase the conflict from the charecters Scout and Bob Ewell from the book "To KIll A Mocking Bird" If Quadrilateral JKLM is a square, where points J(-6, 0), K(?, ?), L(9, -1) and M(2, 7) are known. Find the coordinates of point K.Group of answer choices(-1, -8)(5, -15)(1,8)(1, -8) Factorise 2y^2 + y + 6xy + 9x - 3 Could someone please help Three gel cubes similar to those from the previousscreens have been placed in a colored solution thatseeps into the gel much like nutrients enter a cell.Use the slider to see how the solution affected thegel cubes after some period of time.2. How does this model support the conclusion thatcells need to have a high amount of surface arearelative to their total volume? Circle O has a circumference of approximately 28.3 cm. What is the approximatelength of the radius? Which of these locations is most likely to experience moderate climate throughout the year? 877+100=__+258help me