if a ray of light strikes mirror 1 with an angle of incidence of 52 ∘ , find the angle of reflection of the ray when it leaves mirror 2.

The function of the mass block in an experiment can vary depending on the specific context and setup of the experiment. Here are a few possible functions of a mass block in an experiment:Manipulating Variables, Calibration, Stability and Balance, Control Group etc.

The function of the mass block in an experiment can vary depending on the specific context and setup of the experiment. However, in general, the mass block is used to introduce a controlled amount of mass into the system being studied. Here are a few possible functions of a mass block in an experiment:

Manipulating Variables: The mass block can be used to manipulate and study the effect of mass on the system under investigation. By adding or removing the mass block, researchers can observe how the system responds to changes in mass and understand the relationship between mass and other variables.

Calibration: The mass block can serve as a calibration tool, ensuring that measurements and instruments used in the experiment are accurate. It provides a known and standardized mass that can be used as a reference point for comparison and calibration purposes.

Stability and Balance: In some experiments, the mass block may be used to provide stability and balance to the apparatus or setup. By adjusting the mass distribution, researchers can ensure that the system remains stable and that forces acting on the system are balanced.

Load or Resistance: The mass block can be used to apply a load or resistance to the system, allowing researchers to investigate the response of the system under different loads. This is particularly relevant in studies related to structures, materials, or mechanical systems.

Control Group: In experimental designs, the mass block may serve as part of a control group, providing a baseline or reference condition for comparison with other experimental conditions. By including a mass block in the control group, researchers can isolate the effect of other variables under investigation.

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Answer:

Hope it's help you !!!!! :)

The speed of the plane is given as 44.3 m/s

The time required to make the turn is given as 28.5 s

A) To find the speed of the plane, we can use the formula for centripetal acceleration:

a = v^2/r

where a is the centripetal acceleration, v is the speed of the plane, and r is the radius of the circle. We are given that the centripetal acceleration is 1g, which is equal to 9.8 m/s^2. The radius is given as 200 m. So, we can solve for v:

v^2 = a*r

v^2 = 9.8 m/s^2 * 200 m

v^2 = 1960

v = sqrt(1960)

v ≈ 44.3 m/s

Therefore, the speed of the plane is approximately 44.3 m/s.

B) To find the time required to make the turn, we can use the formula for the period of uniform circular motion:

T = 2pir/v

where T is the period, pi is the mathematical constant pi (approximately 3.14), r is the radius of the circle, and v is the speed of the plane. We have already calculated v as approximately 44.3 m/s, and the radius is given as 200 m. So, we can solve for T:

T = 2pi200 m / 44.3 m/s

T = 28.5 s

Therefore, the time required for the plane to make the turn is approximately 28.5 seconds.

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Answer:

I think the answer is gamma or x ray

In order to form a hypothesis that would illustrate the relationship between mass and kinetic energy, we first need to understand what kinetic energy and mass are and how they are related. Kinetic energy is the energy that an object possesses due to its motion, and is given by the formula KE = 0.5mv², where m is the mass of the object and v is its velocity. Mass, on the other hand, is a measure of the amount of matter in an object.

The relationship between mass and kinetic energy is direct, meaning that as mass increases, so does kinetic energy, provided that velocity remains constant. Similarly, if velocity increases, then kinetic energy will increase as well, provided that mass remains constant.

The hypothesis that illustrates this relationship can be stated as follows:If the mass of an object is increased, then the kinetic energy of the object will also increase, because kinetic energy is directly proportional to mass, assuming velocity remains constant.In other words, if the mass of an object is doubled, then its kinetic energy will also double, assuming that its velocity remains constant. This hypothesis can be tested through experiments that involve measuring the kinetic energy of objects with different masses, but with the same velocity.

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If the mass of an object increases, then its kinetic energy will increase proportionally because mass and kinetic energy have a linear relationship when graphed.

The statement "Electromagnetic waves in free space has frequency 7.24 × 10¹⁴ Hz" is true.

Electric and magnetic fields oscillate while traveling over space to form an electromagnetic wave. The number of oscillations or cycles that take place within a certain period of time is represented by an electromagnetic wave's frequency. In this instance, a frequency of 7.24 × 10¹⁴ Hz indicates that the wave cycles 7.24 × 10¹⁴ times in a second.

Electromagnetic waves can move freely in empty space without interference from other objects or media. Because of this characteristic of free space, electromagnetic waves can move at the same speed as light or about 3 × 10⁸ meters per second.

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Answer:

Explanation:

b )

Normal force R = mgcosθ

= 76.6 x 9.8 x cos 38

R = 591.5 N

c )

Force of friction

= μ R

μ is coefficient of friction .

= .15 x 591.5

= 88.73 N

d )

Net force

= mg sinθ - friction

= 76.6 x 9.8 x sin 38 - 88.73

= 462.16 - 88.73

= 373.43 N

Acceleration = 373.43 / 76.6

a = 4.87 m / s²

e )

v² = u² + 2 a s

s = 40.5 m

a = 4.87

u = 0

v² = 0 +2 x 4.87 x 40.5

= 394.5

v = 19.86 m /s

f )

v = u + a t

19.86 = 0 + 4.87 t

t = 4 .07 s

An electron (charge -e) is at rest in a region of electric potential that varies as a function of position. When released it will move A. into a region of lower potential.

Since the electric potential varies as a function of position, there will be regions of higher and lower potential energy. The electron will move from a region of higher potential energy to a region of lower potential energy. Therefore, the electron will move into a region of lower potential The direction of the electric field is perpendicular to the equipotential lines. Therefore, the electron will move in the direction of the electric field if the equipotential lines are not parallel to the electric field.

If the equipotential lines are parallel to the electric field, the electron will move perpendicular to the electric field. In summary, the electron will move into a region of lower potential while following the direction of the electric field or moving perpendicular to it depending on the orientation of the equipotential lines. So therefore the correct answer is An electron (charge -e) is at rest in a region of electric potential that varies as a function of position. When released it will move A. into a region of lower potential.

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At 12,000 feet above sea level, the temperature is 38°F if the air temperatures at sea level is 80°F.

Daniel Gabriel Fahrenheit, a scientist, initially suggested the temperature measure known as the Fahrenheit scale in 1724. (1686–1736).

The sign for the unit is indeed the letter °F, which stands for degrees Fahrenheit. There are several stories about how he first developed his scale, but according to the first publication, the lower defining point, 0 °F, was chosen as the freezing point of a brine solution that was formed by mixing water, snow, and ammonium chloride (a salt).

His best guess for the normal temperature of a person, which was initially put at 90 °F and later adjusted to 96 °F (around 2.6 °F),The other limit established was lower than the actual value (due to a subsequent revision of the scale).

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The electric field amplitude at the surface of the 7.0-cm-diameter, 90 W light bulb can be estimated, as well as the magnetic field amplitude is 1.19 μT. The electric field amplitude at the surface of the bulb is 60.05KV/m

To estimate the electric field amplitude at the surface of the light bulb, we can use the equation that relates power to electric field amplitude:

\(Power = (Electric field amplitude)^2 * (Surface area of the bulb)\)

=(7×7)(12.25)

=60.05KV/m

First, we need to find the surface area of the bulb. The surface area of a sphere is given by the formula:

\(Surface area = 4\pi r^{2}\)

=4×π×3.5²

=12.25

Using the given diameter of 7.0 cm, we can calculate the radius as half of the diameter. Once we have the surface area, we can rearrange the power equation to solve for the electric field amplitude.

B=√2μоπr²

B=1.19 μT

For the magnetic field amplitude at the surface of the bulb, we can use the relationship between electric and magnetic fields in an electromagnetic wave. In vacuum, the ratio of the electric field amplitude to the magnetic field amplitude is equal to the speed of light.

By performing these calculations, we can estimate the electric and magnetic field amplitudes at the surface of the light bulb, considering the given power and dimensions.

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The magnification of the image of Julitha Barber produced by the converging mirror is 0.0979

To find the magnification of the image, we need to use the formula:

magnification = -v/u,

where v is the distance of the image from the mirror, and u is the distance of the object from the mirror. Since the object is Julitha Barber standing at a distance of 553 m, we can take u as -553 m (negative because the object is on the same side as the mirror).
Now, we need to find the distance of the image from the mirror (v). For this, we can use the mirror formula: 1/v + 1/u = 1/f, where f is the focal length of the mirror, and is equal to half the radius of curvature (f = R/2). So, in this case, f = 1.20 × 102 m/2 = 60 m. Substituting the values in the formula, we get:
1/v + 1/-553 = 1/60
Solving for v, we get v = -54.12 m. (Note that the negative sign indicates that the image is virtual and upright.)
Now, we can use the magnification formula to find the magnification of the image:
magnification = -v/u = -(-55.6)/553 = 0.0979  (rounded to one decimal place)
Therefore, the magnification of the image of Julitha Barber produced by the converging mirror is 0.0.0979. This means that the image is 10 times smaller than the actual object and is virtual and upright.

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Answer:

Radio waves can be considered a form of light waves since both are transverse waves (vibrate perpendicular to direction of travel).

Sound waves are longitudinal waves and require a medium (such as air) for propagation.

The pitch of sound affects the basilar membrane in the cochlea. As sound waves travel through the ear, they cause the basilar membrane to vibrate. This vibration is responsible for stimulating the hair cells that convert sound into electrical signals sent to the brain.

The basilar membrane is an important structure within the cochlea, a spiral-shaped, fluid-filled organ in the inner ear. It is lined with sensory hair cells that are tuned to different frequencies. When a sound wave enters the ear, it causes the basilar membrane to vibrate at a specific frequency. The specific location along the membrane that vibrates depends on the frequency of the sound wave. Higher-pitched sounds with higher frequencies cause vibrations near the base of the cochlea, while lower-pitched sounds with lower frequencies cause vibrations closer to the apex.

The varying pitch of sound causes different regions of the basilar membrane to move, which in turn stimulates the hair cells located along the membrane. These hair cells are connected to nerve fibers that transmit the electrical signals generated by their movement to the brain. The brain interprets these signals as different pitches of sound. In this way, the basilar membrane acts as a frequency analyzer, enabling us to perceive and distinguish between different pitches of sound.

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B. Engineers come up with scientific questions when they are

developing their design, and scientists do research to answer

them

Answer:

Yeah that's right

Explanation:

David Popenoe's research suggests that the weakest families on earth may be found in Western, industrialized nations.

Industrialized countries such as America, France, the United Kingdom, and other Western nations have weaker family values and structures than developing nations, according to David Popenoe's research. The family's crucial role in society's economic, social, and emotional stability has long been recognized by social scientists.

Popenoe's research supports the notion that Western, industrialized societies may be experiencing a family crisis.Popenoe says that family disintegration and weakening is a serious social problem in the Western world. Popenoe's studies found that Western societies, which place a high value on independence, individualism, and personal satisfaction, are at odds with the family's objectives of commitment, obligation, and selflessness.

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Answer:

1.16 m/s

Explanation:

Mass of first ice; m1 = 26 kg

Mass of second ice; m2 = 12 kg

Velocity of first ice; v1 = 1.7 m/s

Velocity of second ice; v2 = 0 m/s

From inelastic collision, the formula we will use is;

m1•v1 + m2•v2 = (m1 + m2)v'

Where v' is the final velocity of the combined ice chunks

Plugging in the relevant values gives;

(26 × 1.7) + (12 × 0) = (26 + 12)v'

44.2 = 38v'

v' = 44.2/38

v' ≈ 1.16 m/s

Displacement at 10s

\(\\ \bull\tt\dashrightarrow Velocity\times Time\)

\(\\ \bull\tt\dashrightarrow 5(10)=50m\)

Displacement at next 5s

\(\\ \bull\tt\dashrightarrow -8(5)=-40m\)

Now

Total displacement=50-40=10m

The value that we get by solving the equation is 3. This we get by solving the equation and with the help of given values of u and t.

In mathematical formulas, the equals sign is used to indicate that two expressions are equal. The meaning of the word equation and its cognates might vary slightly depending on the language. For example, an equation in English is defined as any properly expressed formula that consists of two expressions connected by the equals sign, whereas an equation in French is defined as having one or more variables.

According to the question, the given values are :

u = 11 and,

t = 9.

The given equation is :

3 + 11 t - 9 u

Substitute the given values of u and t in the equation :

3 + 11 (9) - 9 (11)

= 3

Hence, after solving the equation, the value we get is 3.

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The wall of the bulb of a thermometer is made thin beause allow the heat from sample being measured to reach the liquid quickly for fast response and quick reading (improves the quickness of response by the thermometer). ... — has a vacuum above the liquid column so there is no resistance to the expanding liquid.

If a book is drops from a height of 1.4 m, then the speed with which book hits the ground is 5.2 m/s.

Given,

Initial velocity = 0m/s

Height = h = 1.4m

Acceleration due to gravity = 9.8 m/s2.

This can be calculated by using third equation of motion,

v2 - u2 = 2gh

where,

v is the final velocity

u is the initial velocity

h is the height

and g is the acceleration due to gravity.

By substituting all the values, we get

v2 = 2 × 1.4 × 9.8

v2 = 27.44

v = 5.2 m/s

Thus, we concluded that if a book is drops

from a height of 1.4 m, then the speed with which book hits the ground is 5.2 m/s.

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The efficiency of moving the box is 60%.

Given in the question

Force exerted by peter = 500 N

Force due to friction on box = 200 N

Distance Traveled by box = 3 meters

Now work done by the force is given by

Work Done = (Magnitude of Force) × (Distance traveled)

Let us find work done by each force,

Work done by peter

Work Done = (Magnitude of Force) × (Distance traveled)

Put in the value, we get

Work Done =500 × 3

Work Done by peter = 1500 J

Similarly, Work done by friction

Work Done = (Magnitude of Force) × (Distance traveled)

Put in the value, we get

Work Done =200 × 3

Work Done by Friction = 600 J

As we know the work done by friction force is always negative,

Work Done by Friction = -600 J

So, net Work done = Work Done by peter + Work Done by Friction

net Work done = 1500 - 600

Net Work done = 900 J

Now Efficiency = (Net work done/work done by peter) × 100

Put in the values, we get

Efficiency = (900/1500) × 100

Efficiency = (3/5) × 100

Efficiency = 300/5

Efficiency = 60 %

So, the efficiency of moving the box is 60%.

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Answer:

A fish that lives near the surface of the ocean most likely has a swim bladder (or body cavity) that is full of oxygen

Explanation:

The swim bladder is the organ present in the majority of bony fishes that provides buoyancy. The swim bladder is a bladder filled with oxygen and found in the in the body of the fish

The function of the swim bladder is to provide adequate ballast or hydrostatic balance to enable a fish to keep to a certain depth in a body of water thereby the fish does not float to the surface or sinks further

The swim bladder is also used as a sound communicating organ.

( True ) Pluto is the farthest planet from the sun in our solar system. Its average distance from the sun is about 3.7 billion miles. Due to this vast distance, the intensity of sunlight reaching Pluto is significantly weaker than on Earth. From Pluto's perspective, the sun appears as a very bright star in the sky, rather than a massive glowing ball.

The sun's apparent magnitude, which is a measure of its brightness as seen from Earth, is about -26.7. However, when viewed from Pluto, the sun's apparent magnitude drops to about -19.5, which is more than a thousand times fainter. This is because the intensity of sunlight decreases with distance, following the inverse-square law. Therefore, the sun would appear much dimmer to an observer on Pluto than on Earth.

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Answer:

The correct answer will be "0.022 kg/s".

Explanation:

The given values are:

Initial amplitude,

A₁ = 0.3 m

Final amplitude,

A₂ = 0.1 m

Mass of a egg,

m = 50.0 g i.e., 0.050 kg

Time,

t = 5 sec

As we know,

⇒  \(A_{2}=A_{1}e^{(-\frac{b}{2m})t}\)

So that, the damping constant will be:

⇒  \(b=\frac{2m}{t} log \frac{A_{1}}{A_{2}}\)

On putting the estimated values, we get

⇒  \(b=\frac{2\times 0.050}{5}log \frac{0.3}{0.1}\)

⇒     \(=\frac{0.1}{5} log \frac{0.3}{0.1}\)

⇒     \(=0.02 \ log 3\)

⇒     \(=0.0219 \ kg/sec \ or \ 0.022 \ kg/s\)

Inelastic collision and a host of other factors causes the loss of energy.

Kinetic energy of an object is the energy that it possesses due to motion.

It can be defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. When it has gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.

In an inelastic collision which is the case of ball X and Y, the kinetic energy of the system is not conserved. The energy that you find lost has been dissipated as other forms of energy. This can be heat, friction, vibrational energy transferred to atoms of the colliding particles, energy lost to deform the atomic structure etc.

In conclusion, the inelastic collision nature of the two balls results in the loss of energy through different forms.

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Answer:

KE=1/2*m*v^2

KE=1/2*15*2.7^2

KE=54.675 J

Explanation:

Answer:

c) those caused by parasites

Answer:

F = m × a = 50 kg × 0.8 m/s2 = 40 kg • m/s2, or 40 N

Explanation: