what principle is responsible for the fact that certain sunglasses can reduce glare from reflected surfaces?

Answer:

It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface

If no external forces act on a moving object, it will continue moving at the same speed. This is known as Newton's First Law of Motion, also called the law of inertia.                                                                                                                                            

In the absence of any external forces, an object in motion will continue moving with a constant velocity. This means that the object will not slow down or speed up unless acted upon by an external force.
If no external forces act on a moving object, it will follow Newton's first law of motion, also known as the law of inertia. According to this law, an object in motion will continue moving at the same speed and in the same direction unless acted upon by an external force. Therefore, the correct answer to your question is option (a): the object will continue moving at the same speed. This law explains the natural tendency of objects to maintain their current state of motion, whether at rest or in motion.

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The statement itself is true. But to be completely and compulsively correct, that's Newton's FIRST law of motion, not the third.

Answer:

a. 15,000J

b. .76m

Explanation:

KE = (1/2)m*v²

KE = .5*1000kg*30m/s

KE = 15000J

PE = m*g*h

7500J = 1000kg*9.81m/s²*h

7500J = 9810*h

h = .76m

Answer:

Energy is: the ability to do work

The formula for energy is: power x time = energy

Explanation:

Hope this helps (there isn't really an explanation)

Answer:

i took a screenshot of the answer

Explanation:

Hope this helps! :)

To find the pressure when the gas is pumped into a 5.00 L vessel, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

According to Boyle's Law, the product of the initial pressure (P1) and initial volume (V1) is equal to the product of the final pressure (P2) and final volume (V2). Mathematically, it can be represented as P1 * V1 = P2 * V2.

Given:

Initial pressure (P1) = 1200 mmHg

Initial volume (V1) = 10.0 L

Final volume (V2) = 5.00 L

Using the formula, we can solve for the final pressure (P2):

P2 = (P1 * V1) / V2

P2 = (1200 mmHg * 10.0 L) / 5.00 L

P2 = 2400 mmHg

Therefore, the pressure when the gas is pumped into the 5.00 L vessel is approximately 2400 mmHg.

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Answer:

V = 49.05 [m/s]

Explanation:

We can easily find the result using kinematics equations, first, we will find the distance traveled during the 5 seconds.

\(y =y_{o}+(v_{o}*t)+(\frac{1}{2}*g*t^{2} )\)

where:

Yo = initial position = 0

y = final position [m]

Vo = initial velocity = 0

t = time = 5 [s]

g = gravity aceleration = 9.81 [m/s^2]

The initial speed is zero, as the body drops without imparting an initial speed. Therefore:

y = 0 + (0*5) + (0.5*9.81*5^2)

y = 122.625[m]

Now using the following equation we can find the speed it reaches during the 5 seconds.

\(v_{f} ^{2}= v_{i} ^{2}+(2*g*y)\\v_{f}=\sqrt{2*9.81*122.625} \\v_{f}=49.05 [m/s]\)

Explanation:

Nasa picture po ang answer

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Explanation:

Uppercase B is the brown eyed gene. It's dominant over the recessive gene lowercase b, which is for blue eyes. Convention has the uppercase letter always dominate over the lowercase recessive gene.

Note the genotypes of the offspring are all Bb. This tells us we have nothing but brown eye offspring. The visual indicator also shows four brown eyes, which backs up each Bb genotype. The phenotype is the observed brown eyes that others can see, while the genotype deals with the gene pairings.

Since four offspring out of four total have brown eyes, this means the percent of brown-eyed offspring is 4/4 = 1.00 = 100%

The subject of the painting is a seascape, with a storm raging in the background. The turbulent waves and dark clouds reflect the turbulence of the time.

Waves are a type of energy that moves in a periodic pattern and is created when a force is applied to a medium. Waves are characterized by their amplitude, frequency, and wavelength. They can propagate through different mediums such as air, water, and solids. Examples of waves include sound, light, and seismic. Waves are used in various scientific fields, such as physics and engineering, as well as in everyday life. For example, sound waves are used to communicate, and light waves are used for vision. Waves can also be used to measure distances, such as in radar and sonar.

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a small cart is rolling at constant velocity on a flat track. it fires a ball straight up into the air as it moves. after it is fired, happens to the ball it falls right back into the cart.

The ball's velocity only has a vertical component in the cart's frame of reference. Thus, it rises and then descends. The ball nevertheless returns inside the cart because, to a ground observer, both the cart and the ball have the same horizontal velocity.You drop a cargo from an aircraft that is travelling straight ahead at a steady pace. If air resistance is absent, the package will,At the time of release, both the plane and the package have the same horizontal velocity.They will continue to move at this speed in the x-direction to preserve alignment.

Correct question:a small cart is rolling at constant velocity on a flat track. it fires a ball straight up into the air as it moves. after it is fired, what happens to the ball?

1) it depends on how fast the cart is moving

2)it falls behind the cart

3) it falls in front of the cart

4) it falls right back into the cart

5)it remains at rest

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The statement its acceleration is positive from 0 seconds to 60 seconds about the object represented in the graph is TRUE (Option B).

Positive acceleration occurs when an object increases its velocity or speed in a measurement that includes not only velocity as vector but also direction (the same sense) in order to produce a movement as a positive value.

Therefore, with this data, we can see that positive acceleration refers to the increase of velocity in a given unit of time having the same direction during this process.

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Answer:

Frequency of wave = 2.16 Hz (Approx)

Explanation:

Given:

Speed of tsunami = 970 km/h

Wavelength = 450 km

Find:

Frequency of wave

Computation:

Frequency = Speed / Wavelength

Frequency of wave = Speed of tsunami / Wavelength

Frequency of wave = 970 / 450

Frequency of wave = 2.16 Hz (Approx)

If the width of the slit is narrowed, the band of light will become wider. thus option B is the answer.

When light passes through a narrow slit, it undergoes diffraction, which causes it to spread out and produce a pattern on a screen placed behind the slit. The width of the slit determines the size of the diffraction pattern, with narrower slits producing wider patterns. Therefore, if the width of the slit is narrowed, the diffraction pattern will become wider. This is because the narrower slit causes the light passing through it to spread out more, resulting in a wider pattern on the screen. As a result, the band of light observed on the screen will become wider

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Energy from the sun sets in motion extraordinary interactions between the atmosphere, In option C In conclusion, organisms and minerals, energy from the earth's core profoundly affects the shape of the ground we walk on.

C In conclusion is the best option to use in this sentence. This is because the sentence presents a summary or conclusion of the information that has been presented in the paragraph or passage. The phrase "In conclusion" signals to the reader that the author is wrapping up their thoughts on the topic and is a common way to signal the end of a presentation or discussion.

Option A "Consequently" could also be a good choice if the preceding information discussed the consequences or results of the interactions between the atmosphere, organisms, minerals, and energy from the earth's core.

Option B "Meanwhile" would not be a good choice because it suggests that there is some kind of parallel or contrasting action occurring at the same time, which is not the case in this sentence.

Lastly, Option D "For example" would not be a good choice because it introduces an example to illustrate a point, but the sentence does not present an example.

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The two key factors that affect the strength of the gravitational force between objects are their mass and the distance between them.

The factors that affect the strength of the gravitational force between objects are:
1. Mass of the objects: The strength of the gravitational force increases with the increase in mass of the objects involved.
2. Distance between the objects: The strength of the gravitational force decreases with the increase in distance between the objects.
In summary, the strength of the gravitational force between objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This relationship is described by Newton's law of universal gravitation.

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The distance covered by the object is given as,

Plug in the known values,

Thus, the distance covered by the object is 81 m.

The universal law of gravitation says that the gravitational force between the two masses is

F₁ = G m₁ m₂ / r ² = 6.0 × 10⁻⁶ N

where r = 12 m. When the distance between the two masses is reduced to R = 4 m, i.e. 1/3 of the original distance r, we have

F₂ = G m₁ m₂ / R ² = G m₁ m₂ / (r/3)² = 1/9 G m₁ m₂ / r ² = 1/9 F₁

so that the resulting gravitational force has 1/9 the first magnitude, or

F₂ = 1/9 (6.0 × 10⁻⁶ N) ≈ 6.7 × 10⁻⁷ N

Explanation:

the answerer is visible

Genetic material is known to absorb UV light. Given what we know, we can confirm that genetic material is not known to absorb light originating from an infrared or microwave radio source.

Genetic material is the hereditary substance in the cell. It carries all information specific to an organism. It is known as DNA (deoxyribonucleic acid) or RNA (ribonucleic acid)

UV light is electromagnetic radiation, and the primary source of UV light that we are exposed to is the sun.

Therefore, given that the only form of light listed that genetic material is known to absorb is that of Ultraviolet or UV light, we can confirm that the answer to the question proposed is infrared and microwave radio light.

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Answer:

Explanation:

The momentum of an object can be found by using the formula

momentum = mass × velocity

From the question we have

momentum = 10 × 15

We have the final answer as

Hope this helps you

Michelson used a technique called the interferometer to measure the time that light took to make the round-trip to the distant mountain.

The interferometer is an optical instrument that splits a beam of light into two separate beams, which then travel different paths before being recombined to produce an interference pattern.

In Michelson's experiment, one of the beams of light was directed towards a mirror located at the top of the mountain, while the other beam was reflected back to a detector. The two beams of light were then recombined and the resulting interference pattern was analyzed to determine the time difference between the two paths.

By measuring the time difference between the two paths, Michelson was able to calculate the distance between the mountain and his laboratory. He then used this distance to determine the speed of light, which allowed him to calculate the time it took for the light to make the round-trip.

Overall, Michelson's use of the interferometer was a groundbreaking achievement in the field of physics, and his measurements of the speed of light have become a cornerstone of modern physics.

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Answer:

(a) 0.6 m/s^2

Explanation:

The coiled spring has elastic potential energy when the door is open.

You have chemical potential energy (energy stored within you), and the motion of pushing the door with your hands had kinetic energy as well (energy in the motion of your hands). Your kinetic and potential energy were converted into mechanical energy when you pushed the door, which resulted in work being done (door opened).

Springs are constructed from substances like spring steel, which, when compressed, stretched, or twisted, reverts to its original shape. Elastic potential energy, which the spring stores when it is bent from its free state and then releases when the spring is unwound, is stored in the deformed state.

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Alpha and beta rays are deflected in opposite directions in a magnetic field because they have opposite charges.

Alpha particles are positively charged while beta particles are negatively charged. When they enter a magnetic field, they experience a force that is perpendicular to their direction of motion and to the direction of the magnetic field. The direction of this force depends on the charge of the particle. Since alpha and beta particles have opposite charges, they experience opposite forces and are deflected in opposite directions.

The magnitude of the force also depends on the velocity of the particle, which is why particles with different energies will be deflected differently. This property of magnetic fields is used in many applications, including in particle accelerators and in medical imaging techniques such as magnetic resonance imaging (MRI). The other options listed in the question are not correct, as the direction of the magnetic force does not depend on the spin of the particle or on the presence of nucleons.

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If a 60 Newton-second impulse is given to an object, the change in momentum  is 60 kg-m/s.

In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion. It is often stated in Newton-seconds or kilograms per second and is denoted by the symbol J.

Impulse of force is = force applied × time interval = change in momentum.

Mass of the object is =  10 kg

Applied impulse is = 60 Newton-second.

Hence,  change in momentum is = 60 kg-m/s, if a 60 Newton-second impulse is given to an object,

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Ultraviolet light exhibits shorter wavelengths compared to visible light, infrared waves, or radio waves.

A wavelength is a measure of the distance between two corresponding points on a wave. Ultraviolet light is a type of electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays. Visible light is the portion of the electromagnetic spectrum that is visible to the human eye and has wavelengths between approximately 400 and 700 nanometers. Infrared waves are longer than visible light and have wavelengths between approximately 700 nanometers and 1 millimeter. Radio waves have the longest wavelengths in the electromagnetic spectrum, ranging from about 1 millimeter to more than 100 kilometers.

Visible light is the portion of the electromagnetic spectrum that is visible to the human eye. It ranges in wavelength from approximately 400 to 700 nanometers and is responsible for the colors we see in the world around us. When white light passes through a prism or water droplets, it is separated into the various colors of the visible spectrum: red, orange, yellow, green, blue, indigo, and violet.

Therefore, Compared to radio waves, infrared waves, or visible light, ultraviolet light has shorter wavelengths.

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If the second player moved horizontally, the speed he must maintain to catch the ball is 27.67 m/s.

The range of the projectile is the maximum horizontal distance travelled by the ball.

R = (u²sin(2θ)) / (g)

where;

R = (32² x sin(2 x 30) ) / (9.8)

R = 90.49 m

The time of motion of the ball is calculated as follows;

R = uₓt

where;

R = ucosθ(t)

t = R/ucosθ

t = (90.49) / (32 cos30)

t = 3.27 seconds

If the second player moved horizontally, the speed he must maintain to catch the ball is calculated as;

R = Ut

U = R/t

U = (90.49) / (3.27)

U = 27.67 m/s

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The average density of the full gas can can be calculated by dividing the total mass of the can (2.00 kg) by the total volume (20.0 l).

Density is a measure of the mass of a substance per unit volume. It is an intensive property, which means it is independent of the amount of the substance present.

This gives an average density of 0.100 kg/m3, taking into account both the volume occupied by the steel and the gasoline.

To further break this down, the steel can itself has a density of 7.85 kg/m3 and the gasoline has a density of 690 kg/m3. Therefore, the proportion of the can's volume occupied by the steel is 0.00785 m3 and the proportion of the can's volume occupied by the gasoline is 0.19915 m3. When these proportions are multiplied by their respective densities, it gives the total mass of the steel (0.01553 kg) and the total mass of the gasoline (1.98447 kg). When added together, these two components give the total mass of the full gas can (2.00 kg).

Therefore, the average density of the full gas can (2.00 kg/20.0 l) is 0.100 kg/m3, taking into account both the volume occupied by the steel and the gasoline.

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