The Doppler shift involves a shift in the ___________________. Check all that apply. Group of answer choices actual intensity produced by the source of sound actual frequency produced by the source of sound the perceived pitch of sound observed by a listener the loudness of sound observed by a listener none of these

The reason is that: In a concave mirror, a ray of light coming from infinity will be reflected back towards the center of curvature of the mirror, as shown in your diagram. The center of curvature is the point on the axis of the mirror that is equidistant from the mirror and the focus of the mirror.

A ray of light coming from the focus of the mirror (point 'F2' in your diagram) will be reflected back along itself. This is because the focus of the mirror is the point at which all rays of light coming from infinity and reflecting off the mirror will converge.

Similarly, in a convex mirror, a ray of light coming from infinity will be reflected away from the center of curvature of the mirror. The center of curvature is the point on the axis of the mirror that is equidistant from the mirror and the focus of the mirror.

A ray of light coming from the focus of the mirror (point 'F2' in your diagram) will also be reflected away from the mirror, but at a greater angle than the ray coming from infinity.

The difference in the reflection of these rays is due to the curvature of the mirror. In a concave mirror, the surface of the mirror is curved inward, causing the rays of light to converge at the focus of the mirror. In a convex mirror, the surface of the mirror is curved outward, causing the rays of light to diverge.

Therefore, As for the points 'A', 'B', and 'C' in your diagram, these points represent the locations where the reflected rays intersect the mirror's axis. The locations of these points depend on the angle at which the rays are incident on the mirror and the curvature of the mirror.

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The illusion of movement that results from two or more stationary, adjacent lights blinking on and off in quick succession is called the stroboscopic effect.

This effect creates the illusion of continuous motion, even though the lights are actually stationary. The blinking lights create a series of still images that the brain interprets as movement. This effect is often used in dance clubs and stage performances to create a dynamic atmosphere. However, it is important to note that the stroboscopic effect can also cause discomfort and seizures in individuals with photosensitive epilepsy.

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Answer:

300m

Explanation:

step one

given data

initial speed u= 15m/s

final speed v= 45m/s

time taken to attain final speed= 10seconds

Step two:

Let us first solve for the acceleration

a= Δv/t

a= 45-15/10

a=30/10

a= 3m/s

applying the equation of motion

\(v^2=u^2+2as\)

substituting our given data

\(45^2+15^2+2*3*s\\\\2025=225+6s\\\\\)

collect like terms

2025-225=6s

1800=6s

divide both sides by 6

s=1800/6

s=300m

The height of the image formed by the convex spherical mirror is approximately 0.64 cm.

To find the height of the image, we can use the mirror formula and magnification formula. The mirror formula is 1/f = 1/u + 1/v, where f is the focal length, u is the object distance, and v is the image distance. Using the given values, we can calculate v.

After finding v, we can use the magnification formula, M = -(v/u), to find the magnification (M). Finally, to find the height of the image (h'), we can multiply the object height (h) by the magnification: h' = M * h. In this case, h' = M * 2.0 cm, which gives us approximately 0.64 cm as the height of the image.

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At the bottom of its swing, where its potential energy is minimum, a pendulum's KE reaches its maximum value. When a pendulum reaches the top of its swing and momentarily stops, its PE is at its maximum and its KE is zero.

At equilibrium, the velocity is at its highest point, and at the extreme, it is at its lowest. As a result, the mean position has the highest kinetic energy.

Position C has the highest kinetic energy; the lowest position has the highest kinetic energy. All of the potential energy from the beginning has been converted into kinetic energy by the time the bob reaches C.

The extreme position of a pendulum causes its velocity to become zero. The extreme position therefore has no kinetic energy.

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Answer: San diego

Because it is closer to the ocean

Answer:3.0m/s

Explanation:

Answer

Newton's law of gravitation, statement that any particle of matter in the universe attracts any other with the force varying directly the product of the masses and inversely as the square of the distance between them. ...

The sun is Yellow, red, orange, and blue. Therefore option B is correct.

The star is moving toward an observer. Therefore option B is correct.

39. The type of radioactive decay represented by the equation provided Gamma. Therefore option A is correct.

40. The statement is completed correctly by the information which states that the coal in Alberta has a lower carbon content than coal in other parts of Canada, resulting in reduced greenhouse gas emissions.

29. graph B depicts the relationship between gravitational field strength and the mass of the International Space Station orbiting Earth.

30. The correct sequence of colors representing the changing temperature from the surface to the atmosphere of the sun is Yellow, red, orange, and blue. Therefore option B is correct.

1. When a star undergoes a blue shift, it indicates that the star is moving toward an observer. Therefore option B is correct.

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Answer:

Explanation:

Volume = Length x width x height

Multiply the length, width and, height to get the volume of the question.

Answer:

A circuit with only one path for electrons is a series circuit.

Explanation:

An electric circuit consists of a completer closed path (or paths) for electric current. A "series" circuit has only one path for the electricity to follow. A "parallel" circuit has two or more paths for the electricity.

The final speed of the bike is 5 m/s.

Speed is  measured as the ratio of distance to the time in which the distance was covered.

To calculate the final velocity, we use the formula below.

Formula:

v = u+at................ Equation 1

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the final speed of the bike is 5 m/s.

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A 1600 watt heater draws 13.3 amperes of current from a 120-volt source. This is determined by using Ohm's Law, which states that current is equal to voltage divided by resistance.

Given the power of a heater =  1600 w/120 v.

The voltage across the heater = 120V

Let the current the heater draws = I

the resistance of the heater is equal to the power rating divided by the voltage, or 1600 watts divided by 120 volts, which equals = 13.3 ohms.

According to Ohms law V = IR

Therefore, the current drawn by the heater is = 120 v/13.3 ohms = 13.3A

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A car of mass 1850 kg is traveling at 22.5 m/s in a straight line. A truck of mass 3170 kg has the same momentum as a car. The speed of the truck is 13.43 m/s.

Momentum and speed-related problems can be solved by using the formula, p= mv. The momentum of an object is defined as the product of its mass and velocity.

The formula for the speed of an object is given by,

speed = distance/time.

To solve this problem, we will equate the momentum of the car with the momentum of the truck.

the momentum of car = momentum of truck

                            m₁v₁ = m₂v₂

where m₁ = 1850 kg, v₁ = 22.5 m/s, m₂ = 3170 kg and v₂ = speed of truck

Substituting the given values in the above equation, we get

1850 × 22.5 = 3170 × v₂

v₂ = 41250/3170

v₂ = 13.43 m/s

Therefore, the speed of the truck is 13.43 m/s.

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Answer:

100 L

Explanation:

10 dL =  1 L

The acceleration of the car at the top of the hill is 6.6 m/s²

acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.

The third kinematic equation is applied to determine the car's tangential acceleration, as illustrated below: v2 = u2 + 2as, where a represents the vehicle's acceleration.

2x50 a = -5.25 m/s²;

2as = v² - u² a

= v²-u² / 2s

a = 102 - 252

At the summit of the hill, the car's centripetal acceleration is given as ac=v²/r

ac=10²/25

ac=4 m/s2.

At the summit of the hill, the car's net acceleration is computed as follows: a net = a2 + ac

a net = (-5.25)2 + 42

a net = 6.6 m/s2.

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Complete Question -

A 1600 kg car is traveling over a hill that has a radius of curvature of 25 m. The car is slowing down as it goes over the hill. It slows down at a constant rate from a speed of 25 m/s to a speed of 10 m/s over a distance of 50 m ending at the top of the hill. The net acceleration of the car at the top of the hill is most nearly

A proton and an antiproton are moving toward each other in a head-on collision. If each has a speed of 0.8c with respect to the collision point, they are moving with respect to each other is: 4.44c

When a proton and an antiproton move toward each other in a head-on collision, if each has a speed of 0.8c with respect to the collision point. The formula that can be used to calculate the relative velocity of the proton and antiproton is:

\(v= (u1+u2) / (1+(u1 * u2) / c^2)\)

Here,v is the relative velocity of the proton and antiprotonu1 is the velocity of the protonu2 is the velocity of the antiproton is the speed of light. The given velocity of the proton and antiproton are u1=0.8c and u2= -0.8c.

The negative sign of antiproton is because the velocity is in the opposite direction. So substituting the given values in the above formula, we get

\(v = (0.8c + (-0.8c)) / (1 + (0.8c * (-0.8c)) / c^2)\)

\(v= 1.6c / (1 - 0.64)\)

\(v= 1.6c / 0.36v= 4.44cc\)  is the speed of light

So the relative velocity of proton and antiproton is 4.44 times the speed of light. Therefore, the relative velocity of the proton and antiproton with respect to each other is 4.44c.

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Answer:

The most likely form of precipitation that may occur when the clouds are very grey and the temperature outside is -3°C is snow.

Explanation:

Answer:

To show that magnets repel, you must place the strong and weak magnets to another magnet with their poles being both south or both north facing eachother.

To show they attract, place opposite poles near eachother.

The two examples of bernoulli’s principle in action are Airplane Wing Lift and Venturi Effect

Example 1: Airplane Wing Lift

Bernoulli's principle can be observed in the phenomenon of lift generated by an airplane wing. The shape of the wing is designed to create a difference in air pressure, resulting in an upward force that counteracts gravity and allows the airplane to fly. As the airplane moves through the air, the air flowing over the curved upper surface of the wing travels faster than the air flowing beneath the wing. According to Bernoulli's principle, the air pressure decreases as the velocity of a fluid increases. Therefore, the faster-moving air above the wing exerts less pressure compared to the slower-moving air beneath the wing. This pressure difference creates lift, pulling the airplane upward.

Example 2: Venturi Effect

The Venturi effect is another application of Bernoulli's principle. It can be observed in systems such as water pipes or carburetors. In a Venturi tube or pipe, the cross-sectional area narrows at a certain point, causing the fluid (liquid or gas) to flow faster at that narrowed section. According to Bernoulli's principle, as the fluid's velocity increases, the pressure decreases. In this case, the narrowing of the pipe creates a region of higher fluid velocity, resulting in lower pressure in that area. This pressure difference can be used to perform tasks like drawing in air into a carburetor or facilitating the flow of water through pipes.

In both examples, Bernoulli's principle explains how the relationship between fluid velocity and pressure creates the observed effects. The principle states that an increase in fluid velocity leads to a decrease in pressure, and vice versa. These principles find applications in various fields, including aviation, fluid dynamics, and engineering.

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Cognitive interview or the way of interviewing eye witnesses is the possible solution for the problems of bias which are associated with blind administration.

Blind administration includes the use of an officer, who is other than the officer, the individual who is constructing the photographic lineup and also the one who does not know the identity of the true suspect, to present the lineup to the eyewitness for the incidence.

Implementing the blind administration, where the officer who is constructing photographic lineup is unaware of who the actual suspect is, can prevent these unconscious actions and also can significantly reduce the likelihood of misidentification.

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This question is very complicated.

You see to determine wether an object's velocity changes, we would look at if that object is accelerating or not, that is the literal definition of acceleration.

Newton's second Law of motion suggests that:

\(f = ma\)

where f and a are vectors, meaning that a change in direction could mean that the velocity of an object has changed.

If an object is not subjected to friction, it could be subjected to other forces like drag,air resistance,ect... these are called resistive forces.

To make this simpler for you, if you mean that will no friction imply that the speed will minimally change then YES absolutely.

But if you mean that if the object is subjected to no friction (not resistive forces), will that object maintain a constant velocity (speed+direction), probably NOT.

The energy difference for a transition in the Paschen series from the higher energy shell n = 4 is approximately -0.66 eV.

In the hydrogen atom, the energy levels of electrons are quantized, meaning they can only exist in certain discrete energy levels. The Paschen series refers to the transitions of electrons between these energy levels.

The energy difference for a transition in the Paschen series can be calculated using the formula:

ΔE = E_final - E_initial

For a transition from the higher energy shell n = 4, the initial energy level is E_initial = -13.6 eV/n^2 = -13.6 eV/4^2 = -0.85 eV. Here, -13.6 eV is the ionization energy of hydrogen and n^2 represents the energy level.

To calculate the final energy level, we need to identify which energy level the electron is transitioning to in the Paschen series. The Paschen series corresponds to electron transitions to the n = 3 energy level.

Therefore, the final energy level is E_final = -13.6 eV/n^2 = -13.6 eV/3^2 = -1.51 eV.

Now we can calculate the energy difference:

ΔE = E_final - E_initial = -1.51 eV - (-0.85 eV) = -0.66 eV.

Hence, the energy difference for a transition in the Paschen series from the higher energy shell n = 4 is approximately -0.66 eV. This represents the energy change associated with the electron moving from the higher energy level to the lower energy level.

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Answer:

7m/s^2

Explanation:

using v=u+at

since the car started from rest, u=0 , v=14m/s t=2s

a =acceleration.

14=0+a×2

14=0+2a

14=2a

a= 14/2 =7

a=7m/s^2

Answer:

Explanation:

According to newton's second law:

Force = mass * acceleration

Given

Mass = 873kg

acceleration = 44.66m/s²

Magnitude of the force is expressed as;

F = ma

F = 873 * 44.6

F = 38,673.9N

Hence the magnitude of the net force exerted on the dragster during this time is 38,673.9N

Answer:

Explanation:

1 meters per second, centimeters per second

2 meters per second, kilometers per hour, knots

3 minutes, seconds

4 meters, feet, inches

5 meters per second squared, kilometers per hour squared

6 kilometers, miles

7 meters per second, miles per hour, feet per second

8 hours, minutes

9 meters per second, kilometers per hour, knots

10 meters, kilometers

11 meters per second squared, kilometers per hour squared

12 kilometers per hour, miles per hour

According to the Newtons third law of motion, the collision between the bumper car and the rider will affect both of them as both the systems have mass and are moving with certain velocities.

Collision is a case where one moving object or person violently collides with another.

The law of interaction or the Newton's third law of motion, says that if one body exerts a force on a second body, the second body exerts a force equal in magnitude and opposite in direction on the first body.

As we know momentum is P = m*v i.e. momentum (P) is directly proportional to the mass and velocity.

Heavier bodies have more mass, therefore have more momentum.

here, the bumper car is the heavy system and hence, it will exerts more impact on the rider.

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Answer:

The answer would be B) The Same

Explanation:

Not gonna lie I checked my class notes but I figured this would help :)

Good luck!!!

The flux of a uniform electric field of magnitude 350 N/C through a square, whose sides have a length of 2.0 m and is oriented at 30° with respect to the electric field, is 1,414 N·m²/C.

The flux of an electric field through a surface is given by the equation Φ = E⋅A⋅cos(θ), where E is the magnitude of the electric field, A is the area of the surface, and θ is the angle between the electric field and the normal vector of the surface.

In this case, the magnitude of the electric field is 350 N/C, and the area of the square is calculated by A = (side length)² = (2.0 m)² = 4.0 m².

To find the flux, we need to consider the component of the electric field that is perpendicular to the surface. The angle between the electric field and the surface is 30°. Taking the cosine of 30°, we have cos(30°) = √3/2.

Plugging in the values into the flux equation, we have Φ = (350 N/C) ⋅ (4.0 m²) ⋅ (√3/2) ≈ 1,414 N·m²/C.

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Answer:

fossils found on Earth

Explanation:

i just did the test 100%

Answer:

Fossils on Earth

Explanation:

Fossils can show that the continents were all together by putting them together on a map you can see the fit. and when you look where fossils were, they would be right next to each other.