Rotation curves for spiral galaxies show? they are slowing down. most of the mass lies in the nucleus. no relation to mass. most have dark halos. rotation speed drops off further from the nucleus.

Option c) 1.5 ml of volume will be given for each dose.

The prescription drug Vistaril is used as preoperative sedation, to treat anxiety symptoms, and to cure skin hives or itching. Vistaril may be taken either on its own or along with other drugs.

The class of medications that includes Vistaril includes antiemetic agents, first-generation antihistamines, and piperazine derivative antihistamines.

Serious adverse reactions to Vistaril include:

Heartbeats that are rapid or hammering, headaches accompanied by chest pain, extreme dizziness, fainting, and convulsions (seizures)

Immediately seek medical attention if you experience any of the above symptoms.

The most typical Vistaril side effects include:

Fatigue, headache, dry mouth, and rash on the skin

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No, there is no range of angles for total internal reflection(TIR).

Total internal reflection (TIR) is an optical phenomenon when waves arriving at the interface (boundary) of two media, such as water and air, are entirely reflected back into the first (internal) medium rather than being refracted into the second (external). It happens when the waves are incident on the interface at a suitably oblique angle and the second medium has a higher wave speed (i.e., lower refractive index) than the first. TIR occurs not only with electromagnetic waves like light and microwaves but also with other types of waves, including sound and water waves. For instance, the water-to-air surface in a typical fish tank, when viewed obliquely from below, reflects the underwater scene like a mirror with no loss of brightness.

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The time taken for the  car to reach 120 mph speed is 12 seconds.

The acceleration of the car is the rate of change of velocity of the car with time.

a = Δv/t

where;

a = (60 mph) / (6 s)

The time of motion at the given constant speed is calculated as follows;

t = v/a

t = (120 mph) / (60 mph / 6s)

t = (120 mph x 6 s) / (60 mph)

t = 2 x 6 s

t = 12 seconds

Thus, the time taken for the  car to reach 120 mph speed is 12 seconds.

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When a solution's pH increases from 6.40 to 8.40. is 100 times smaller.

In chemistry, a solution is a homogeneous mixture of two or more compounds in their relative proportions, which can be constantly changed up to what is known as the limit of solubility. Although solutions of gases and solids are possible, the term "solution" is most frequently used to refer to the liquid condition of matter.

Solutions that are isotonic, hypotonic, and hypertonic (tonicity).

Any of the phases of matter can dissolve in another phase in a solution, which is a homogenous mixture of molecules. Solution chemistry is crucial because the majority of chemical reactions, whether they occur in a lab or in nature, take place in solutions, whether they involve solids, liquids, or gases.

pH = -log [H+]

6.4 = -log [H+]

[H+] = 3.981*10^-7 M

pH = -log [H+]

8.4 = -log [H+]

[H+] = 3.981*10^-9 M

We can see that [H+] at 8.40 is lower by 100 times as compared to [H+] at pH = 6.40.

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Answer:

4.6 s, because that is the time for the object to reach the top of the incline.

Explanation:
that at the top of the incline, the horizontal velocity will be equal to the launch velocity, because there is no longer any force acting on the object in the horizontal direction. The only force acting on the object is gravity, which is acting in the vertical direction. So the only velocity that will be changing is the vertical velocity. The vertical velocity will be changing because of the force of gravity, which is 9.8 m/s2. The equation for the vertical velocity is: vf = vi + a*t, where vf is the final velocity, vi is the initial velocity, a is the acceleration and t is the time. The final velocity in this case is 0 m/s, because the object has reached the top of the incline and is no longer moving in the vertical direction. The initial velocity is 10 m/s, because that is the launch velocity. The acceleration is 9.8 m/s2, because that is the force of gravity. So when you plug all of those values into the equation, you get: 0 = 10 + 9.8*t and you solve for t and you get t = 4.6 s.

Answer:

daughter has the greater speed

Explanation:

hopefully this helps

If you exert force on an inanimate item, you will also be able to calculate the force that the object will apply to you, which will be opposing and equal to your own.

In order to accelerate a heavier (more massive) item in motion, more force must be exerted. When two objects are subjected to the same force, the smaller mass item will change speeds more quickly.

An item can alter its size or shape, begin moving, stop moving, accelerate, or decelerate as a result of a force acting on it. When two things contact, they exert pressures on one another that are identical in size but directed in the opposite direction

The action-reaction law is another name for this rule.

When just one body decides the strength and direction of the force, the force that body exerts is referred to as the "action," and the force that the other body exerts in a similar but opposite direction is referred to as the "reaction."

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The maximum speed of the donkey is 10.72m/s

The question is based on the principle of motion in one dimension and hence formulas of motion in one dimension can be applied.

It is given that donkey attains an acceleration of 1.6 m/s^2

The time taken to accelerate  to given speed is 6.7 seconds

We use the formula v=u + at to find the fastest speed

v is the final or maximum speed

u is the initial speed which in this case is 0 as the donkey is at rest

a is the acceleration of the donkey

t is  the time taken in seconds

v = u + at

v= 0 + 1.6 x 6.7

 = 10.72 m/s

Hence the donkey obtains the speed of 10.72 m/s

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The correct option is (d) 100 feet

Signal at least 100 feet before making a turn.

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For customer arrivals, the random number interval assigned to the time between arrivals of 2 minutes is 0.0500-0.19999.

Time is the continued sequence of the existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. It is a component quantity of the various measurements used to sequence events, to compare the duration of events or the intervals between them, and to quantify rates of change of quantities in material reality or in the conscious experience. Time is often referred to as a fourth dimension, along with the three spatial dimensions.

Time has long been an important subject of the study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars. Nevertheless, diverse fields such as the business, industry, sports, the sciences, and the performing arts all incorporate some notion of time into their respective measuring systems.

Time in physics is operationally defined as the "what a clock reads".

The physical nature of the time is addressed by general relativity with respect to events in spacetime. Examples of events are collision of two particles, the explosion of a supernova, or the arrival of a rocket ship. Every event can be assigned the four numbers representing its time and position (the event's coordinates).

However, the numerical values are different for the different observers. In general relativity, question of what time it is now only has meaning relative to a particular observer. Distance and the time are intimately related, and the time required for light to travel a specific distance is the same for all observers, as first publicly demonstrated by Michelson and Morley. General relativity does not address nature of time for extremely small intervals where quantum mechanics holds. At this time, there is no generally accepted theory of the quantum general relativity.

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You should depress the accelerator if the gasoline in your engine is flooded to the ground and maintain for five seconds.

An internal combustion engine, in particular, is a form of heat engine that is fueled by gasoline. The most popular means of propulsion for motorized vehicles are these engines. While gasoline can be used to power turbines, the term "gasoline engine" only applies to piston-driven gasoline engines.

Is a gasoline engine a diesel engine?

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The time needed to take off is 0.8s

Acceleration can be defined as the rate of change of velocity. It is a vector quantity.

Given that a plane accelerates from rest at a constant rate of 5.0 m/s² along a runway that is 1800 mm long. Assume that the plane reaches the required takeoff velocity at the end of the runway.

The takeoff velocity V will be

V² = U² + 2aS

Where

Substitute all the parameters into the formula above

V² = 0 + 2 × 5 × 1.8

V² = 18

V = √18

V = 4.24 m/s

The time t needed to take off will be

V = U + at

4.24 = 0 + 5t

5t = 4.24

t = 4.24 / 5

t = 0.8 s

Therefore, the time needed to take off is 0.8s

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Momentum of the elephant is 69.3 kg-m/s

Momentum is a property of a moving body by the virtue of its motion and is a product of mass and velocity.

As per Newton's second law of motion,

momentum= mass x velocity

Mass of the elephant is given as 6300kg

Velocity of elephant is given as 0.11 m/s

Therefore,

momentum = 6300 x 0.11

                      69.3 kg -m /s

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Answer:

See below

Explanation:

Each parallel row = 50 v   so there is 25 cells in each  (2 v each)

  200 cells / 25 cells / row = 8 rows  of 25 cells each

    the equivalent resistance is

          each row has resistance = 25 ohms

               equivalent resistance =

                            1 / ( 8 * 1/25) = 3.125 ohms

Ines of latitude run from East to West and measure angular distances North or South of the equator.

The latitude defines a geographical coordinate of a location on the earth's surface and is the angular distance of that point (north or south of the equator) measured with respect to the Earth's Center. It is zero at the equator and 90 degrees at the poles. Latitude lines, often known as parallels, are imaginary lines that divide the Earth. They go east to west, although you may measure north or south. The most well-known parallel is the equator. It splits the Earth into Northern and Southern hemispheres at 0 degrees latitude. Latitude increases as you move north or south from the equator, reaching 90 degrees at either pole.

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Life has been found on Earth in a lake deep under the Antarctic ice pack. This resembles europa environment in the solar system which has been considered a possible location for life.

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Answer:

White with black lettering

Explanation:

Generally they are yellow with black lettering but that's for highways at least the state I live in.

Hope this helps!

The potential difference of 2.7 x [tex]10^{4}[/tex] volts is needed.

We have an X - Ray tube to produce X - Rays.

We have to determine what potential difference to produce X-rays with a minimum wavelength of 45.0 pm ?

An X - Ray is an electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light.

According to the question, we have -

λ = 45 pm = 4.5 x [tex]10^{-11}[/tex] meter

h = 6.63 × [tex]10^{-34}[/tex]Js

c = 3 x [tex]10^{8}[/tex] m/s

We know -

E = hv

where v is frequency.

E = [tex]$\frac{hc}{\lambda}[/tex]

When accelerated through a potential difference of say V volts, then -

E = E(k) = eV

Therefore -

eV =  [tex]$\frac{hc}{\lambda}[/tex]

V = [tex]$\frac{hc}{e\lambda }= \frac{6.63\times 10^{-34} \times 3\times 10^{8} }{1.6\times 10^{-19} \times 4.5 \times 10^{-11} }[/tex] = 2.7 x [tex]10^{4}[/tex] volts

Hence, the potential difference of 2.7 x [tex]10^{4}[/tex] volts is needed.

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The statement is True.  

Neurons have a net negative charge when it is at rest. This means that when they are well active, they must have a positive charge.

At rest, neurons have a net negative charge; the inside of neurons is approximately 70 millivolts more negative than the outside. When neurons are active, they must be positively charged in order to generate an action potential.

Neurons have a strong negative charge within them, as opposed to a positive charge outside. This is due to the presence of other molecules known as anions. They are negatively charged but far too large to escape through any available channel. They remain in place and give the cell a negative charge on the inside.

Because of an unequal distribution of positive ions across the membrane, the resting potential is negative; 3 Na+ is pumped out of the cell for every 2 K+ that enters, so the inside of the cell is less negative (less positive) than its surroundings.

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The normal force exerted on the rover when it rests on the surface of the planet be greater is 3,125.22 N.

A normal force is defined as the force that a surface exerts on an object.

N = W

N = mg

where;

Normal force is proportional to the weight of an object be considered.

N = mg

N = 1,063 kg x 0.3(9.8 m/s²)

N = 3,125.22 N

Thus, the normal force exerted on the rover when it rests on the surface of the planet be greater is 3,125.22 N.

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The lung volume that represents the maximum amount of exchangeable air is the: vital capacity

The vital capacity is the volume of air that can be taken into the lungs by inhaling and expelling air by inspiration and expiration. it is also known as (VC).

The value of the VC is around 4800 mL and it varies according to the age and body size. The formula to calculate the vital capacity is:

VC = TV+IRV+ERV

Where:

The lungs are one of the largest organs of the body and are in charge of the respiratory function. They have a spongy appearance and are located in the thorax, protected by the ribs, one on each side of the heart.

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Integrating the velocity equation, we will see that the position equation is:

[tex]$f(t)=\frac{\cos ^3(\omega t)-1}{3}[/tex]

Let the velocity of the particle is:

[tex]$v(t)=\sin (\omega t) * \cos ^2(\omega t)[/tex]

To get the position equation we just need to integrate the above equation:

[tex]$f(t)=\int \sin (\omega t) * \cos ^2(\omega t) d t[/tex]

[tex]$\mathrm{u}=\cos (\omega \mathrm{t})[/tex]

Then:

[tex]$d u=-\sin (\omega t) d t[/tex]

[tex]\Rightarrow d t=-d u / \sin (\omega t)[/tex]

Replacing that in our integral we get:

[tex]$\int \sin (\omega t) * \cos ^2(\omega t) d t$[/tex]

[tex]$-\int \frac{\sin (\omega t) * u^2 d u}{\sin (\omega t)}-\int u^2 d t=-\frac{u^3}{3}+c$[/tex]

Where C is a constant of integration.

Now we remember that [tex]$u=\cos (\omega t)$[/tex]

Then we have:

[tex]$f(t)=\frac{\cos ^3(\omega t)}{3}+C[/tex]

To find the value of C, we use the fact that f(0) = 0.

[tex]$f(t)=\frac{\cos ^3(\omega * 0)}{3}+C=\frac{1}{3}+C=0[/tex]

C = -1 / 3

Then the position function is:

[tex]$f(t)=\frac{\cos ^3(\omega t)-1}{3}[/tex]

Integrating the velocity equation, we will see that the position equation is:

[tex]$f(t)=\frac{\cos ^3(\omega t)-1}{3}[/tex]

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The average acceleration of the car as it accelerates from 15 m/s to 25 m/s will be 2.5 m/s².

Average acceleration is the average rate of change of velocity with respect to time. Mathematically -

a = Δv/Δt

Given that a car is traveling at 15 m/s in north direction and in 4 seconds it accelerates to 25 m/s in the north direction only. Therefore, we can write -

initial velocity [u] = 15 m/s

final velocity [v] = 25 m/s

time taken [Δt] = 4 s

The magnitude of the average acceleration can be calculated as follows-

a = Δv/Δt

Δv = v - u = 25 - 15

Δv = 10 m/s

Therefore -

a = 10/4

a = 2.5 m/s².

Therefore, the average acceleration of the car will be 2.5 m/s².

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During the resting phase,  −80 mV is the electric potential energy of a typical Na ion outside of the cell

The power required to move a charge in opposition to an electric field is known as electric potential energy. A charge must be moved through a stronger electric field with more energy, but it also must be moved through a weaker electric field with more energy.

You cannot see the charge that is waiting to pass through the wires when a light switch is off. That is but one illustration of electric potential energy. Other instances include: a switched-off incandescent light bulb.

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Answer:

P = W / t         work / time = power

P = F * S / t

F = P t / S       force required

F = P / (S / t)            since given .075 meters / sec

F = 340 J/sec / .075 m/sec = 4530 J / m = 4530 Newtons

Your blue receptors will become fatigued if you stare at a blue image for too long, and the afterimage will be the opposite colour: orange.

A yellowing of the optical medium of the eye causes Xanthopsia, a colour vision impairment in which blue dominates in perception. Digoxin's inhibition of the sodium pump as well as cataract formation, which can have the effect of a yellow filter, are the most frequent causes.

A blue-green, or cyan, afterimage of the same size and form can be seen if you stare at a red item and then look at a white region shortly after.

Digibind or Digifab, also known as digoxin-specific antibody antigen-binding fragments (DSFab), are a potent antidote that binds digoxin directly.

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The level (n) of the final state of the electron n₂ = 6

a photon, also known as a light quantum, is a very small energy package of electromagnetic radiation. When explaining the photoelectric effect in 1905, Albert Einstein proposed the potential of energy levels packets during the transmission of light.

A negatively charged subatomic component called an electron can be either attached to or detached from an atom (not bound). Protons, neutrons, and electron that is bonded to the atom make up the three basic types of particles that make up an atom. Protons, neutrons, and electrons make up the nucleus of an atom.

An atom of hydrogen has a value of 1.0952 x 10-6 m

starting at level 1, the electron n = 3

what is the electron's final state level (n).

[tex]\frac{1}{\lambda}=\bar{v}=R_H\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)[/tex]

λ =   1.0952 x 10⁻⁶m

  = 1.0952 x 10⁻⁴cm

R[tex]_H[/tex] = 109677cm⁻¹

n₁ = 3

n₂ = ?

Putting the value in the formula:

we get,

1/1.0952 x 10⁻⁴ = 109677cm⁻¹[tex]\left(\frac{1}{3^2}-\frac{1}{n_2^2}\right)[/tex]

0.0833 = 1/9 - 1/(n₂)²

(n₂)² = 1/0.0278

n₂ = 6

The level (n) of the final state of the electron n₂ = 6

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Ratio of the no. of turns in primary coil to the no. of turns in the secondary coil is 1:2

Transformer -

A device used in the power transmission of electric power.

It is commonly used  to increase or decrease the supply voltage without changing the frequency of AC b/w circuit.

In simple word transformer is a thing that steps up or steps down voltage.

In step up transformer-

The output voltage is increased.

The secondary output voltage is higher that primary voltage.

In step down transformer-

The output voltage is decreased.

These are used to convert the high voltage primary supply to low voltage secondary output.

In step up transformer

N₁/N₂= V2/V₁= I₁/I₂ (equation 1.)

A ideal step up transformer double the primary voltage

Then Vs = 2 Vp

Using in equation 1. We get

Vp/Vs = N1/N2

Vp/2Vp = N1/N2

N1/N2 = 1/2

N1 : N2 = 1:2

Ratio of the no. of turns in primary coil to the no. of turns in the secondary coil is 1:2

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Answer:

mass of water = 98.44 - 35.00 = 63.44g

water has a density of 1000g/L

Volume of bottle = 63.44/1000 = .06344L

mass of other liquid = 88.78-35 = 53.78g

density of other liquid = 53.78g/0.06344L = 847.73g/L

Since water has a specific gravity of 1, set up a relation 1000/847.73 =1/sg

sg=.85