When white light strikes a prism, what happens and why?
The white light emerges with the colors separated, with the red light bending the least.

have a higher intensity in the red part of the spectrum

Because of the Doppler effect, the spectra of most galaxies show redshifts. This means that their spectral lines Group of answer choices always are in the red part of the visible spectrum

Most galaxies' spectra have been redshifted, which means that their spectral lines are now pushed away from their normal or rest wavelengths and towards longer wavelengths. When an object travels away from an observer, the Doppler effect causes the shift phenomenon.

The Big Bang hypothesis and the concept of the expanding universe, show that galaxies are moving away from us, observed from the redshift lines.

The waves' apparent wavelengths shift as a result, changing the color of light waves or the pitch of sound waves.

Hence, because of the Doppler effect, the spectra of most galaxies show redshifts. This means that their spectral lines Group of answer choices always are in the red part of the visible spectrum.

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Answer:

Vf = 11.04 m/s

Explanation:

First, we consider free fall motion with zero initial velocity. Using 2nd equation of motion:

h = Vi t + (1/2)gt²

where,

h = height of bridge = ?

Vi = Initial  Speed  = 0 m/s

t = time taken = 4.5 s

g = 9.8 m/s²

Therefore,

h = (0 m/s)(4.5 s) + (1/2)(9.8 m/s²)(4.5 s)²

Therefore,

h = 99.225 m

Now, we consider the forced motion when the youth throws the ball with some negative initial energy:

Vi = - Vi

t = 3 s

h = 99.225 m

Therefore,

99.225 m = - Vi(3 s) + (1/2)(9.8 m/s²)(3 s)²

Vi = (- 99.225 m + 44.145 m)/3 s

Vi = - 18.36 m/s

Now, we use this in 1st equation of motion for final velocity:

Vf = Vi + gt

Vf = -18.36 m/s + (9.8 m/s²)(3 s)

Therefore,

Vf = 11.04 m/s

Answer:

Displacement = velocity x time.

=4×3

=12m/s

a)The tension in each cable forms a triangle as shown below

The triangle formed is a right triangle.

AC represents the inclined cable

AB represents the horizontal cable

BC represents the vertical cable

The tension is the force acting on the vertical table. Given that the force is 512N,

the tension on the vertical table is 512N

To find the tension on the inclined cable, we would apply the Sine trigonometric ratio which is expressed as

Sinθ = opposite side/hypotenuse

From the triangle,

θ = 33

opposite side = BC = 512

hypotenuse = AC

Thus,

Sin 33 = 512/AC

By crossmultiplying,

512 = ACSin33

AC = 512/Sin33

AC = 940.1 N

The tension on the inclined cable is 940.1 N

To find the tension on the horizontal cable, we would apply the tangent trigonometric ratio which is expressed as

Tanθ = opposite side/adjacent side

adjacent side = AB

tan 33 = 512/AB

By crossmultiplying,

ABtan33 = 512

Dividing both sides of the equation by tan 33, we have

AB = 512/tan33

AB = 788.4

The tension on the horizontal cable is N788.4

None of the options listed is a negative externality. A negative externality is an unintended consequence of an economic activity that affects a third party who is not directly involved in the activity.

If I were to choose: Businesses would not necessarily increase hiring rates.

This could be considered a negative externality because the grant funding is intended to fund job training in order to increase employment opportunities, but if businesses do not increase their hiring rates despite having a pool of trained workers, then the intended benefit of the grant may not be fully realized. This could result in a loss of resources and a missed opportunity to address unemployment in the community.

Answer:

F'=708.53 N

Explanation:

We have,

The lifting force, F, exerted on an airplane wing varies jointly as the area, A, of the wing's surface and the square of the plane's velocity, v. It means tat,

\(F=kAv^2\)

k is constant

If, A = 190 Ft², v = 220 mph, F = 950 pounds

Let's find k first from above data. So,

\(k=\dfrac{F}{Av^2}\\\\k=\dfrac{950}{190\times 220^2}\\\\k=0.0001033\)

It is required to find the lifting force on the wing if the plane slows down to 190 miles per hour. Let F' is the new force. So,

\(F'=0.0001033\times 190\times (190)^2\\\\F'=708.53\ \text{pounds}\)

So, the lifting force is 708.53 pounds if the plane slows down to 190 miles per hour.

The lifting force on the wing if the plane slows down to 190 miles per hour F'=708.53 N

The force is an external agent applied to the body to displace it from its position .The force can be of different types lifting force, Frictional force, viscous force etc.

We have,

The lifting force, F, exerted on an airplane wing varies jointly as the area, A, of the wing's surface and the square of the plane's velocity, v. It means  that,

\(F=kAv^2\)

k is constant

If, A = 190 Ft², v = 220 mph, F = 950 pounds

Let's find k first from above data. So,

\(k=\dfrac{F}{Av^2}\)

k=950/190*220^2

k=0.0001033

It is required to find the lifting force on the wing if the plane slows down to 190 miles per hour. Let F' is the new force. So,

F'=0.0001033×190×190^2

F'=708.53 pounds

So, the lifting force is 708.53 pounds if the plane slows down to 190 miles per hour.

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99.16 Newtons is the new force of attraction between the particles.

The forces that hold atoms together to create molecules and solids are referred to as chemical bonds. The attraction between the electrons of one atom and the nuclei of another atom as a result of this electric force is what is known as a chemical bond.

\(F = (kq1q2)/r^2\)

\(9,916 = (kq1q2)/r^2\)

\(F = (k*(q1/5)*(q2/5))/(2r)^2\)

\(F = (1/100)((kq1*q2)/(r^2))\)

So, the new force of attraction is:

\(F = (1/100)*9,916 = 99.16\)Newtons (rounded to 4 decimal places)

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The driver takes 1.43s in air. the horizontal range is 2.86m .the final vertical velocity is -14.014m/s.

It is the distance travelled by the projectile in the horizontal direction.

it is defined as the rate of change of displacement in a unit second.

unit of velocity is m/s.

mathematically,

v=s/t

Given,

A driver jumps off the 10 meter platform at a swim competition.

They are moving 2 m/s horizontally as they leave the diving platform.

Thus, Height = h = 10 m

initial velocity = u = 2m/s

Thus, according to the formula of time of descent if projectile fired horizontally,

t =√(2h/g)

t = √ {(2×10)/9.8}

t= 1.428 s

t = 1.43s

According to the formula of horizontal range,

x = u×√(2h/g)

x = u×t

x = 2×1.43 = 2.86m

According to the formula of vertical velocity,

v = -gt

v= -(9.8×1.43)

v = -14.014m/s

Hence, the driver takes 1.43s in air. the horizontal range is 2.86m .the final vertical velocity is -14.014m/s.

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Answer:

R = 240 Ω

Explanation:

The resistance created by the light bulb can be calculated by using Ohm's Law:

\(V = IR\\\\R =\frac{V}{I}\)

where,

R = Resistance created by the light bulb = ?

V = Voltage across the bulb = 120 volts

I = current passing through the light bulb = 0.5 A

Therefore,

\(R = \frac{120\ volts}{0.5\ A}\)

R = 240 Ω

For the projectile motion of the stone a) The time taken T = 9.04s b) the angle of the projectile = 62.31° c) the Range attained R = 209.923m

A stone propelled from a catapult is an example of projectile motion.

Given, the initial velocity of the stone u = 50 m/s; This initial velocity with which the stone is thrown has two components 1) vertical \(u_{y}\) = u sinθ along the Y axis and 2) horizontal \(u_{x}\)=u cosθ along the X axis

where θ is the angle of projection

maximum vertical displacement or height attained by stone = H

(Use sign convention +ve for upwards and -ve for downwards)

a) equation for the maximum vertical height reached by a body during projectile motion   \(H=\frac{u^{2} sin^{2}\theta }{2g}\)      (1)

equation for the time of flight of projectile motion \(T=\frac{2usin\theta}{g}\)           (2)

Given H = displacement in the y direction = height attained = 100m

u =  initial velocity = 50m/s ; acceleration due to gravity g =9.8 m/\(s^{2}\)

using equation (1)

\(100=\frac{50^{2}sin^{2}\theta }{2*9.8}\)

⇒\(sin^{2} \theta= \frac{100*2*9.8}{50^{2} }\)

⇒sinθ\(=\sqrt{\frac{10*2*9.8}{50^{2} } }\)

⇒sinθ = 0.885437

⇒θ = \(sin^{-1} (0.885437)\)

⇒θ = 62.31°

Hence  from equation (2) time of flight

\(T=\frac{2*50*sin\theta}{9.8}\)

⇒\(T=\frac{2*50*0.885437}{9.8}\)

⇒T = 9.04 s

Time is taken T =9.04s

b) Angle of projectile θ = 62.31°

c) The range attained \(R=\frac{u^{2}sin2\theta }{g}\)

⇒\(R = \frac{50^{2}sin(2*62.31)}{9.8}\)

⇒R = \(\frac{50^{2}*0.8229}{9.8}\)

⇒R= 209.923m

horizontal range attained R= 209.923m

Components of a projectile motion:

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Answer:

C

Explanation:

I got it right on the test !!

The student that is correct is C. Student B is correct because Newton’s 1st Law of Motion states that if the chair were to be exerting a force on the student, her motion would change.

According to Newton's third law of motion, there's an equal and opposite reaction force for every action force. It should be noted that when an individual sits on a chair, the chair is actually exerting a force back on her in reaction to the force exerted upon the chair.

Student A is incorrect because when she sits down on a chair, the force that she's exerting on the chair is not the only thing that happens because the chair exerts a force back. Therefore, as the chair were to be exerting a force on the student, her motion would change.

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Answer:

Answer:

If the velocity is constant, then there is no acceleration. That is, the value of the acceleration is 0.

Explanation:

Several atmospheric factors can contribute to fatal injuries caused by excessive heat. These factors include:

1. Temperature: High ambient temperatures are a key factor in heat-related fatalities. Prolonged exposure to extreme heat can lead to heatstroke and other severe heat-related illnesses.

2. Humidity: Humidity affects the body's ability to cool itself through sweating. High humidity levels impede the evaporation of sweat, making it harder for the body to dissipate heat. This can result in a higher risk of heat exhaustion and heatstroke.

3. Heat index: The heat index takes into account both temperature and humidity to determine how hot it feels to the human body. Higher heat index values indicate an increased risk of heat-related injuries and fatalities.

4. Air quality: Poor air quality, such as high levels of pollutants or airborne particles, can exacerbate the effects of heat on the body. It can contribute to respiratory distress and other health complications, especially in individuals with pre-existing respiratory conditions.

5. Urban heat island effect: Urban areas tend to retain more heat due to the abundance of concrete, asphalt, and buildings. This can lead to higher temperatures in cities compared to surrounding rural areas, increasing the risk of heat-related injuries and fatalities.

6. Heatwave duration: The length of a heatwave can impact the severity of its effects. Prolonged exposure to extreme heat without relief or adequate cooling opportunities can escalate the risk of heat-related injuries and deaths.

It is important to monitor these atmospheric factors and take necessary precautions, such as staying hydrated, seeking shade or air-conditioned environments, and avoiding strenuous activities during periods of excessive heat, to mitigate the risks associated with fatal heat injuries.

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When two people each exert a force of 300N, pulling a car by a separate ropes in the east direction. the first person pulls at an angle of 20° N of E and the second person pulls at an angle of 20° S of E. then the work done on the car by each worker is 1578 J if the the car moves 0.5 m/s for 5.6s.

Given,

x component of Force F₁  = Fcos20° = 300cos20° = 281.9 N

y component of Force F₂  = Fcos20° = 300cos20° = 281.9 N

The actual force acting on the car is,

F₁(x) + F₂(x) = 281.9 N + 281.9 N = 563.8 N.

The distance travelled by the car,

d = v×t = = 0.5 × 5.6 = 2.8 m

The work W is force times distance

W = F.s = 563.8 N.× 2.8 m = 1578 J

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Explanation:

hope this may help you

have a nice day

Answer:

Solids

Explanation:

Particles are most orderly in solids.

Answer:

B. A well-tested explanation for a widely accepted hypothesis

Explanation:

This is true about a scientific theory going by the fact of it being a well tested explanation. For example, in one of the Newtons law of motion which he stated to be "To every action, there is equal and opposite reaction", the hypothesis has been known till he was able to offer a well tested explanations with calculations showing that, it was actually true.

Starburst galaxies is simply known as the rate at which the galaxy is now converting gas into stars. The statement that is not a general characteristic of starburst galaxies is that The "starburst" is thought to be caused by the presence of a supermassive black hole in the galaxy's center.

They are known to be rare. A starburst is known to be an astrophysical process. It is the process of star formation happening at a rate that is large when compared to the rate that is often observed.

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Which is not a general characteristic of starburst galaxies?

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The capture theory contends that the Moon was once an errant body (similar to an asteroid) that formed somewhere else in the solar system and was drawn in by the gravity of Earth as it passed close by.

The Moon, on the other hand, was generated alongside Earth during its formation, according to the accretion theory.The theory behind fusion: According to this idea, the Moon was once a component of the Earth and somehow became apart from it early in the development of the solar system. The current Pacific Ocean basin is the most well-liked location for the region of Earth from which the Moon originated. The huge impact hypothesis, which is the most widely accepted idea and is backed by the scientific community, contends that the moon formed when something slammed into the early Earth. comparable to other worlds.The Fission Theory: According to this idea, the Moon was originally a part of the Earth and was somehow split apart from the planet early in the solar system's history. The current Pacific Ocean basin is the most well-liked location for the region of Earth from which the Moon originated.

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,Paige does 182.9 J of work on the crate as it slides 3.3 m down the ramp.

To determine the work done by Paige on the crate as it slides down the ramp, we need to calculate the component of Paige's force that is parallel to the direction of motion of the crate. This component will do work on the crate by exerting a force in the same direction as the crate's displacement.

We can first calculate the weight of the crate, which is given by

W = mg

where m is the mass of the crate and g is the acceleration due to gravity. We can assume that the crate is on a frictionless surface, so the force of friction is zero. Therefore, the weight of the crate is the only force acting on it parallel to the ramp. Using the angle of the ramp, we can calculate the component of the weight that is parallel to the ramp:

F_parallel = mg sin θ

where θ is the angle of the ramp, which is 20∘. We can also calculate th

m = W/g

where g is the acceleration due to gravity, which is 9.81 m/s^2.

Substituting the values, we get:

m = (F_parallel/sin θ)/g

m = (mg sin θ/sin θ)/g

m = g

Therefore, the mass of the crate is equal to g.

Next, we can calculate the force applied by Paige, which is given by:

F_applied = 69 N

Since Paige is pushing back on the crate, her force is in the opposite direction of the crate's motion, so we need to calculate the negative of F_parallel. Therefore, the net force acting on the crate is:

F_net = F_applied - F_parallel

F_net = 69 N - g sin θ

Finally, we can calculate the work done by Paige on the crate using the formula:

W = F_net d

where d is the distance traveled by the crate, which is 3.3 m. Substituting the values, we get:

W = (69 N - g sin θ) x 3.3 m

Using the value for g and θ, we get:

W = (69 N - 9.81\(m/s^2\)x sin 20∘) x 3.3 m

W = 182.9 J

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The speed as the stone hits the ground is 29.4 m/s

The distance at which the stone fell is 44.1 m.

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.

An example of an amphetamine is speed. It is a central nervous system stimulant that releases significant amounts of dopamine. Dopamine is a neurotransmitter in the brain linked to reward and pleasure.

Although it is occasionally used to refer to other amphetamines, speed is the street name for amphetamine sulphate. It typically appears as an off-white or pinkish powder and occasionally as crystals. It can also be found in the form of a paste, which is often white, grey, or brown in color and can be grippy and wet.

Speed can be defined as the ratio of distance to time.

(a) To calculate the speed at which the stone hit the ground, we use the formula below.

Formula:

v = u+gt............ Equation 1

Where:

v = Final speed of the stone

u = Initial speed of the stone = 0 m/s

t = time = 3 seconds

g = acceleration due to gravity = 9.8 m/s²

Substitute the values above into equation 1

v = 0+3×9.8

v = 29.4 m/s

(b) To calculate the distance the stone fell, we use the formula below.

S = ut+gt²/2........... Equation 2

Where:

S = Distance

Solving for S by substituting into equation 2

S = (0×3)+(9.8×3²)/2

S = 44.1 m

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Answer:

An interval is a distinct measure of time or the physical or temporal distance between two things.

Explanation:

The volume of the triangular shape is 10.35 km³.

In geometry, volume is the amount of space enclosed by a three-dimensional object. It is measured in cubic units, such as cubic meters or cubic centimeters. The volume of a regular object can be calculated using a formula, while the volume of an irregular object can be calculated by dividing it into smaller regular objects and adding up their volumes.

For example, the volume of a cube with a side length of 1 meter is 1 cubic meter. The volume of a sphere with a radius of 1 meter is 4/3π cubic meters. The volume of a cylinder with a radius of 1 meter and height of 2 meters is 2π cubic meters.

The formula gives the volume of a triangular shape:

V = 1/2 * b * h * t

where:

b is the base of the triangle

h is the height of the triangle

t is the thickness of the triangle

In this case, we have:

b = 7 km

h = 1.9 km

t = 3 km

So now, the volume of the triangular shape is:

V = 1/2 * 7 km * 1.9 km * 3 km = 10.35 km³

Therefore, the volume of the triangular shale is 10.35 km³.

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Answer:

A. It is made of tissues that can conduct electricity, a required function in a system.

Explanation:

The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages.

Answer:

D

Explanation:

it is D because a system needs to manage a large organism like us to allow us to live, therefore, needs to work with other systems to keep us alive