A 4.0-cm-tall object is 16 cm in front of a diverging lens that has a -20 cm focal length.a. Calculate the image position.b. Calculate the image height.

Physical effects refer to the changes or alterations that occur in the physical properties of an object or system, as a result of a physical force or interaction.

Physical effects are the modifications or changes that take place in an object's or system's physical characteristics as a result of a physical force or interaction.

These effects can be observed and measured through various physical phenomena, such as temperature, pressure, density, electric fields, and magnetic fields, among others.

Examples of physical effects include the deformation of a material under stress, the heating or cooling of an object when it is exposed to a heat source or cold environment, the change in pressure of a gas when it is compressed or expanded, the flow of electric current through a conductor, and the generation of magnetic fields around a magnet or current-carrying wire.

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Answer:

Associations Clusters

Explanation:

There is three basic type of clusters, globular clusters, open clusters, associations clusters. Associations cluster consist of younger stars that is younger than globular and open clusters stars.

To discover the youngest stars you could find in some grouping of stars in the Galaxy, type of star group would be the best to search is Associations Clusters.

A galaxy is a massive cluster of gas, dust, billions of stars, and their solar systems that are all bound together by gravity. Earth is a planet in our solar system where we call home.

A galaxy cluster, also known as a cluster of galaxies, is a formation made up of hundreds to thousands of galaxies that are gravitationally coupled to one another.

There is three basic type of clusters, globular clusters, open clusters, associations clusters. Associations cluster consist of younger stars that is younger than globular and open clusters stars.

To discover the youngest stars in the galaxy the best group is Associations cluster.  

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Answer:

Star trails reflect Earth's rotation, or spin, around its axis. The Earth makes a complete rotation relative to the backdrop stars in a period of about 23 hours and 56 minutes.

The proper time interval between the two events is 0.435 s. Hence, the correct option is (b) 0.435 s.

Given that an observer flying over the stadium at a speed of 0.75c, measures 0.658 s as the time between the two events (hitting and catching the ball).

To find the proper time interval between the two events.

The time interval measured by the observer is called the "dilated" time interval (t').

The proper time interval (Δt) is found using the formula,

Δt = t' / γ

where

γ = 1 / √[1 - (v/c)²] is the Lorentz factor, v is the velocity of the observer, and c is the speed of light.

Given:

v = 0.75c, t' = 0.658 s, and

c = speed of light = 3 × 10⁸ m/s

Thus,

γ = 1 / √[1 - (v/c)²]

= 1 / √[1 - (0.75)²]

= 1 / √(0.4375)

= 1 / 0.6614

= 1.5126

Therefore, Δt = t' / γ

= 0.658 / 1.5126

≈ 0.435 s

Therefore, the proper time interval between the two events is 0.435 s. Hence, the correct option is (b) 0.435 s.

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Answer:

a=2 m/s²

Explanation:

v=u+at

25=15 +5a

5a=10

a=2 m/s²

Answer:

no change

Explanation:

The Newton's Second Law of motion states that when an unbalanced force is applied to an object, it causes an accelerated motion in the object, in the direction of the unbalanced force. So, if there is no unbalanced force, then there is no motion. In this case both the forces have same magnitude and opposite direction. Therefore, the unbalanced force will be zero:

Unbalanced Force = Upthrust - Weight

Unbalanced Force = 2448 N - 2448 N

Unbalanced Force = 0 N

hence, there will be no motion in the vertical direction. Therefore, the correct option is:

no change

Answer:

73.1 m/s

Explanation:

Given:

Δx = 160 m

v = 6.9 m/s

t = 4 s

Find: v₀

Δx = ½ (v + v₀) t

160 m = ½ (6.9 m/s + v₀) (4 s)

v₀ = 73.1 m/s

The heat required to melt all the ice is Q = 2204.49 kJ

Mass = Density * Volume and Volume = Area * Width

The area of the ice is 1.2m² and the width is 0.80cm

Then volume of ice = 1.2 m² * 0.008 m = 0.0096 m³

So there is a mass of ice on the windshield

Mass (m) = 917 kg/m³ * 0.0096 m³ = 0.9312kg

The heat that must be reached in order for ice to melt

Q sen is the sensible heat up to melting temperature (T m = 0°C , assuming pressure =1 atm as windshield is exposed to atmosphere)

Let Q lat be the latent heat of melting ice at its melting temperature

1) Q sen = m ice * c ice * ( T final - T initial) = 0.9312 kg * 2.108 kJ / Kg °C ( 0°C - (-7°C)) = 13.74 kJ

2) Q lat = m ice * L ice = (0.9312 kg * 335 kJ/kg ) = 311.952kJ

Thus Q sum = Q sen + Q lat = 13.74 kJ + 311.952 kJ = 325.692 kJ

This is the minimum amount of heat required, since we have not considered heat losses to the surroundings.

The specific heat of ice (c ice) is 2.108KJ/Kg°C and the latent heat of ice and snow (L ice) is 335KJ/Kg

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Answer: D

Explanation:

Frank’s Furniture trains all of its employees to use computers is an example of an improvement in human capital.

A square wave can be synthesized as a series of odd harmonics, where the amplitude of each harmonic is given by the formula an = 1/(na). In this case, the amplitude of the fundamental frequency (a) is 10^-3 m.

We are asked to find the amplitudes of the first five harmonics in the series.

1. For the first harmonic (n = 1), the amplitude is:
  a1 = 1/(1 * 10^-3) = 1000 m
2. For the second harmonic, since n = 2 is not an odd integer, we skip it.
3. For the third harmonic (n = 3), the amplitude is:
  a3 = 1/(3 * 10^-3) = 333.33 m
4. For the fourth harmonic, again n = 4 is not odd, so we skip it.
5. For the fifth harmonic (n = 5), the amplitude is:
  a5 = 1/(5 * 10^-3) = 200 m
To summarize, the amplitudes of the first five harmonics in the square wave series are as follows: a1 = 1000 m, a3 = 333.33 m, and a5 = 200 m. Note that only odd harmonics contribute to the square wave, and even harmonics are not included in this analysis. The string vibrates at twice the fundamental frequency, which is the lowest possible standing wave. A wave is the vibration of a string. A vibrating string produces a sound with a constant frequency, or pitch, due to resonance. If the length or tension of the string is properly adjusted, a melodic tone will be created.

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Answer:

The penguins are gliding foward without stopping because there is no external force changing their state.

Explanation:

Newtons first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

Answer:

d. decomposer

Explanation:

they play a critical role in the flow of energythrough an ecosystem. They break apart dead organisms into simpler inorganic materials, making nutrients available to primary producers

Answer:

it is very hard but i am trying to help you.

Explanation:

Answer:

The crust in Item A is found partially below sea level as compared to the crust in Item B.

Explanation:

You're welcome!

Answer: c. The crust in Item A is found partially below sea level as compared to the crust in Item B.

Explanation:

By following these steps, you will find the hydrostatic force acting against the horizontal square at the bottom of the 3ft pool with the given liquid density.

To calculate the hydrostatic force against a horizontal square (2ft x 2ft) at the bottom of a 3ft pool, you can follow these steps:
Step 1: Find the pressure at the bottom of the pool.
Hydrostatic pressure (P) can be calculated using the formula:
P = ρgh
where ρ (rho) is the liquid density, g is the acceleration due to gravity (32.2 ft/s²), and h is the depth of the pool (3ft).
Step 2: Calculate the hydrostatic pressure.
Use the given liquid density (ρ) and plug in the values into the formula:
P = ρ * 32.2 * 3
Step 3: Find the area of the horizontal square.
Area (A) = length × width = 2ft × 2ft = 4ft²
Step 4: Calculate the hydrostatic force.
Hydrostatic force (F) can be calculated using the formula:
F = PA
Substitute the calculated pressure (P) and area (A) into the formula:
F = P * 4
By following these steps, you will find the hydrostatic force acting against the horizontal square at the bottom of the 3ft pool with the given liquid density.

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The essential safety function that is most troubled by the additional heat produced from post-fission radioactive decays, which continues even after the reactor has been shut off, is called decay heat removal. Decay heat is the heat that is produced as a result of nuclear fission and radioactive decay of the nuclear fuel inside the reactor even after the reactor has been shut down and the control rods have been inserted into the core to stop the nuclear reaction.

Therefore, the decay heat removal function is one of the most important safety functions of a nuclear power plant. This is because, if the decay heat is not removed from the reactor core, the core can overheat and cause a nuclear meltdown, which can have catastrophic consequences. Several cooling systems are used to remove decay heat from the reactor core, such as the primary coolant system, the secondary coolant system, and the emergency cooling system.

These systems remove heat from the reactor core and transfer it to the environment outside the power plant through a series of heat exchangers. It is essential to keep these cooling systems working in case of an emergency shutdown. If they fail, the reactor core will become too hot and could melt, releasing radioactive material into the environment, and leading to serious health risks and environmental damage.

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Answer:

  a = 7.5 m / s²

Explanation:

For this exercise let's use Newton's second law, let's create a coordinate system with the x axis parallel to the plane and the y axis perpendicular to the plane

Y axis

       N - W cos θ = 0

       N = mg cos θ

X axis

       W sin θ = m a

       mg sin θ = m a

        a = g sin θ

let's calculate

        a = 9.8 cos 40

        a = 7.5 m / s²

A force is an effect that changes, or accelerates, the velocity of a mass-moving object (such as one that is traveling from a state of rest).

Thus, It is a vector quantity since it can be a push or a pull and always has magnitude and direction. It is denoted by the letter F (formerly P) and is measured in newtons (N), the SI unit of force.

The net force acting on an object is equal to the rate at which its momentum varies over time, according to Newton's second law in its original formulation.

According to this equation, the acceleration of an item is directly proportional to the net force acting on it, is in the direction of, and has a constant mass.

Thus, A force is an effect that changes, or accelerates, the velocity of a mass-moving object (such as one that is traveling from a state of rest).

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The centripetal force acting on the stone, during the circular motion is 314.07 N.

Length of the string, L = 0.5 m

Mass of the stone attached to the string, m = 1 kg

Velocity with which the stone is moving through the vertical circlr, v = 5 m/s

Length, L = 2πr

Therefore, the radius of the circular path,

r = L/2π

r = 0.5/(2 x 3.14)

r = 0.0796 m

The expression for the centripetal force acting on the stone, during the circular motion is given by,

F = mv²/r

F = 1 x 5 x 5/0.0796

F = 25/0.0796

F = 314.07 N

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Answer:

317.52 mi/hr

Explanation:

First convert Meters into miles as the answer is required in miles/ h

1000m = 0.62 mi

Now, convert second into hours

7.45s = 0.0001 hr

The speed of the boat would be

v = 0.62/0.0001

=317.52 mi/hr

The person gets 34 million excess electrons but her mass does not increase.

Mass is a measure of the amount of matter in an object. It is typically measured in kilograms (kg), though other units like grams (g) and pounds (lbs) are also used. Mass is different from weight, which is a measure of the force of gravity on an object. Mass is constant in all gravitational fields, while weight changes depending on the strength of the gravitational field.

The person scuffing her feet on the wool rug is accumulating a net charge of -34 mc (microcoulombs). This means that she is gaining 34 million electrons. However, this does not increase her mass, since electrons have a very small mass compared to the overall mass of a person.

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The student should avoid using yellow light if they want to measure activity at different wavelengths.

Yellow light should not be used since it lacks the pigment necessary to absorb wavelengths between 550 and 580 that will cause it to be completely ineffective.

Color  Wavelength (nm)

Red         650 - 800

Orange   590 - 640

Yellow    550 - 580

Blue       460 - 480

Indigo    440 - 450

Violet     390 - 430

In physics, a periodic wave's wavelength is the length over which its form repeats. It is a characteristic of other spatial wave patterns as well as traveling and standing waves.

It is the separation between two consecutive positions on a wave that correspond to the same phase, such as two close-by crests, troughs, or zero crossings. The reciprocal of wavelength is the spatial frequency. Wavelength is usually denoted by the Greek letter lambda ().

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Answer:(D.)

Explanation:

Answer:

Speed of  cannonball just before it hits the ground is  90.77 m/s

Explanation:

Complete Question

A small cannon is placed on top of a fortification. the cannonball leaves the muzzle of the cannon with a speed of 85 m/s at an angle of 25°c above the horizontal. just before the cannonball hits the ground, the vertical component of velocity is 48 m/s downward. what is the speed of the cannonball just before it hits the ground? ignore air resistance.

Solution

Given  

Speed = 85 m/s

The angle = 25 degrees

When it will hit the ground, then vertical velocity = 48 m/s

However, in the projectile motion, the horizontal component will not change  

Vr = V cos (theta) = 85 * cos25

Speed of  cannonball just before it hits the ground is  

V’ = Sqrt (48^2 + (85 * cos 25)^2) = 90.77 m/s

Metals have shiny apperances

Balanced forces are forces that do not result to change in motion while unbalanced forces are forces that result to change in motion.

Force is defined as the product of mass and acceleration of an object. That is Force = mass × acceleration.

Balanced force is a type of force that do not result to change because the forces are equal in size and opposite.

Unbalanced force is a type of force that result to change because forces on the opposite sides are not equal.

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Answer:

1.89*10⁶J

Explanation:

because 4500kg * 42m*10m/s² is 1890000J

Given data

*The given veloicty of the rock is u = 27 m/s

*The given height of the cliff is h = 35 m

*The given height of the Rick from the ground level is s = 5 m

*The value of the acceleration doue to gravity is g = 9.8 m/s^2

The formukla for the time taken by the Rick at 5 meters from the ground level is given as

Substitute the known values in the above expression as

Hence, the time taken by the Ric at 5 meters above the ground lel is t = 6.45 s

Answer:

6.45 s

Explanation:

df = final position = 5 m              a = accel of gravity = -9.81 m/s^2

do = original position = 35 m         vo = original velocity  = 27m/s

df = do + vot + 1/2 at^2

5 = 35 + 27t - (1/2)9.81t^2  

-4.905 t^2+ 27t +30 = 0  

               Use quadratic formula  a = -4.905    b = 27     c = 30

                                            to find t = 6.45 s

(Ignore the negative value found with the Quadratic Formula)