When a pitcher throws a baseball, it reaches a top speed of 39 m/s. if the
baseball takes 1.5 seconds to travel from the pitcher to the catcher, what is
its acceleration? (assume the ball is moving at 0 m/s right before it leaves
the pitcher's hand.)
a. 17 m/s2
b. 23 m/s2
o c. 11 m/s2
d. 26 m/s2

1. The wavelength of the wave is 0.4 m

2. The frequency is 10 Hertz

3. The wavelength will be half the original wavelength.

4. The frequency of the wave is 0.05 Hertz

The wavelength of the wave can be obtain as follow:

Velocity (v) = wavelength (λ) × frequency (f)

800 = wavelength × 2000

Divide both sides by 2000

Wavelength = 800 / 2000

Wavelength = 0.4 m

The frequency of the wave can be obtain as illustrated below:

Velocity (v) = wavelength (λ) × frequency (f)

10 = 1 × frequency

Frequency = 10 Hertz

The wavelength of the wave can be obtain as shown below:

v = fλ

Since v is constant, we have

f₁λ₁ = f₂λ₂

Thus, we have:

f × λ = 2f × λ₂

Divide both sides by 2f

λ₂ = fλ / 2f

λ₂ = λ / 2

Thus, we can conclude that the wavelength will be half the original wavelength

The frequency of the wave can be obtain as shown below:

Frequency = Number of wave / time taken

Frequency = 6 / 120

Frequency = 0.05 Hertz

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Answer:

1. The wavelength of the wave is 0.4 m

2. The frequency is 10 Hertz

3. The wavelength will be half the original wavelength.

4. The frequency of the wave is 0.05 Hertz

1. How do i determine the wavelength?

The wavelength of the wave can be obtain as follow:

Frequency of wave (f) = 2.0 KHz = 2.0 × 1000 = 200- Hz

Speed of wave (c) of = 800 m/s

Wavelength (λ) = ?

Velocity (v) = wavelength (λ) × frequency (f)

800 = wavelength × 2000

Divide both sides by 2000

Wavelength = 800 / 2000

Wavelength = 0.4 m

2. How do i determine the frequency?

The frequency of the wave can be obtain as illustrated below:

Speed of wave (v) = 10 m/s

Wavelength of wave (λ) = 1 m

Frequency of wave (f) =?

Velocity (v) = wavelength (λ) × frequency (f)

10 = 1 × frequency

Frequency = 10 Hertz

3. How do i determine the wavelength?

The wavelength of the wave can be obtain as shown below:

Initial frequency (f₁) = f

Initial wavelength  (λ₁) = λ

Speed = Constant

New frequency (f₂) = 2f

New wavelength (λ₂) =?

v = fλ

Since v is constant, we have

f₁λ₁ = f₂λ₂

Thus, we have:

f × λ = 2f × λ₂

Divide both sides by 2f

λ₂ = fλ / 2f

λ₂ = λ / 2

Thus, we can conclude that the wavelength will be half the original wavelength

4. How do i determine the frequency?

The frequency of the wave can be obtain as shown below:

Time taken = 2 minutes = 2 × 60 = 120 seconds

Number of wave = 6 complete waves

Frequency =?

Frequency = Number of wave / time taken

Frequency = 6 / 120

Frequency = 0.05 Hertz

Explanation:

Among the options given, "Forestry" is not considered one of the three most anthropogenic sources of greenhouse gas emissions. The correct answer is C. Forestry.

Greenhouse gas emissions refer to the release of gases into the atmosphere that contribute to the greenhouse effect and global warming. While all of the options mentioned - Industry, Transportation, and Energy - are major anthropogenic sources of greenhouse gas emissions, "Forestry" is not typically included among them.

The three primary sources of greenhouse gas emissions are generally recognized as Industry, Transportation, and Energy.

1. Industry: Industrial activities, such as manufacturing, construction, and chemical production, can release significant amounts of greenhouse gases into the atmosphere. These emissions are often associated with the burning of fossil fuels for energy, as well as industrial processes that produce emissions as byproducts.

2. Transportation: The transportation sector, including cars, trucks, airplanes, ships, and trains, is a significant contributor to greenhouse gas emissions. The combustion of fossil fuels in vehicles releases carbon dioxide (CO2) and other greenhouse gases into the atmosphere.

3. Energy: The energy sector, particularly the burning of fossil fuels for electricity generation, is a major source of greenhouse gas emissions. Power plants that rely on coal, oil, and natural gas release CO2 and other greenhouse gases when these fuels are burned.

While forestry can have an impact on the carbon cycle and the sequestration of carbon dioxide through deforestation and forest degradation, it is not typically included among the three most anthropogenic sources of greenhouse gas emissions.

However, it is important to note that land-use changes associated with deforestation can contribute to greenhouse gas emissions indirectly.

In conclusion, among the options provided, "Forestry" is not considered one of the three most anthropogenic sources of greenhouse gas emissions. The primary sources are Industry, Transportation, and Energy.

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Explanation: Research highlights the individuals with ASDS are nutritionally vulnerable because they exhibit a selective or pick eating pattern and sensory sensitivity that predisposes them to restricted intakes.

I hope this helps!

If we treat an electron in a hydrogen atom as a wave and require an integer number of wavelengths in a circular path around the nucleus, then we can show that the electron can only orbit at a limited number of radii. The first option is correct.

This is because the circumference of each orbit must be an integer multiple of the wavelength of the electron wave. Therefore, the allowed radii of the electron's orbit are quantized, and the electron can only exist in certain discrete energy levels.

Furthermore, we can show that the electron can have a continuum of binding energies. This is because the energy of the electron in an atom is determined by its wave function, which can take on a range of values.

The wave function depends on the position of the electron in the atom, so the energy levels can be seen as a continuum rather than as discrete values.

However, it is not true that the electron will eventually merge with the nucleus, making a neutron.

The formation of a neutron requires the combination of a proton and an electron to produce a neutron, which is not a natural process in an isolated hydrogen atom.

Additionally, we can show that the electron will be bound to the nucleus due to the electrostatic attraction between the positively charged nucleus and the negatively charged electron. The first option is correct.

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Answer:

20 m/s

Explanation:

Use the position/displacement formula to find out how long the ball is in the air:

(distance) = (initial velocity)*(time) + (1/2)*(acceleration)*(time)^2

20 = 0*t + 1/2*10*t^2

t^2 = 4

t = 2 seconds

Use the velocity formula:

(final velocity) = (initial velocity) + (acceleration)*(time)

Vf = 0 + 10*2

Vf = 20 m/s

Answer:

D. Wavelength

Explanation:

Explanation: the colour of visible light depends on the wavelength of the wave. The visible light spectrum goes approximately from wavelength of 380 nm (corresponding to violet light) to 750 nm (corresponding to red light), and the different colours in between correspond to different wavelengths.

Answer:

A

Explanation:

Positive slope lines have a left to right ascent. A negative slope is present on lines that descend from left to right. Consequently, a diagonal line with a positive slope (/) would be to the right. Thus, option A is correct.

The height difference between two tile corners that is on the diagonal. A hidden value is used to determine if a tile can be seeded on, passed by a cart, or have the corner of the pavement tile lowered.

When two variables have a positive slope, it means that they are positively correlated; that is, when x rises, y rises as well, and when x falls, y falls as well.

A line on a line graph that has a positive slope rises as the line advances from left to right.

Be aware that a line's positive slope causes it to slope upward from left to right. Remember that a line with a negative slope descends from left to right. Keep in mind that a line has no slope when it is horizontal.

Therefore, positively sloping diagonal general shape of the graph line.

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Answer:

Friction is caused in roller coasters by the rubbing of the car wheels on the track and by the rubbing of air (and sometimes water!) against the cars.

Explanation:

Answer:

2. increase

3. stay the same

4. Decrease

Explanation:

(let me know if im wrong on any we learned this last year so I might be a little rusty on this subject)

The force of gravity increases with increase in the size of the Sun and with decrease in the distance between the earth and the Sun. However, it decreases with decrease in the size of the earth.

Gravity is the force of attraction that exists between two bodies separated by a given distance.

The force of gravity increases with increase in the size of the bodies as well as with a decrease in the distance of separation.

However, the force of gravity decreases with decrease in the size of the bodies as well as with a increase in the distance of separation.

Thus, for the force of gravity between the earth and the Sun;

Therefore, the force of gravity is affected by size of the bodies as well as the distance separating the bodies.

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Answer:

Equivalent

A conversion factor is a ratio of equivalent measures

Answer:

Sonic boom.

When something breaks the sound barrier. (Moves faster than sound, like lighting)

Explanation:

Try flying a plane.

Answer:

w

Explanation:

they are equal and opposite forces (the Fg or w and the Ft)

The tension in the cord is equal to the weight of the suspended object W.

(option C is the correct answer)

The tension in cord is obtained from the resultant of the tension in cord A and cord B.

The sum of the vertical component of the forces of A and B is calculated as;

Y = w sin ( 30 )  +  w sin ( 45 )

Y = 0.5 w + 0.71 w

Y = 1.21 w

The sum of the horizontal component of the forces of A and B is calculated as;

X = w cos ( 30 )  +  w cos ( 45 )

X = - 0.866 w  + 0.71 w

X = -0.16 w

The resultant of the forces is calculated as;

F = √ (0.16² + 1.21²)

F = 1.22 w

The tension in the cord C is calculated as follows;

C sin (90) = F

C = F

C = 1.22 w

C ≈ w

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Answer: 1) Mass is a scalar quantity while weight is a vector quantity

2) Mass is measured in Gramma and kilogram while weight is measured in Newton.

Explanation:

Mass can be defined as the amount of matter that comprises an object. It is a scalar quantity, that is, it has magnitude. It is measured in kilogram with its unit in Kg. Mass is measured using an ordinary weighing scale.

Weight can be defined as the force acted upon an object due to gravity. Weight is a vector quantity, that is, it has both magnitude and direction towards the center of the earth. Weight can be measured with the use of a spring balance. Its unit is in Newton.

The main reason for building large optical telescopes on the Earth's surface is to collect as much light as possible from faint objects.

Option B is the correct choice. Large optical telescopes are constructed on the Earth's surface primarily to maximize the collection of light from distant and faint celestial objects. By having a larger aperture, these telescopes can gather more photons, increasing the sensitivity and resolution of the observations.

The Earth's atmosphere also plays a significant role in the operation of optical telescopes. While it can introduce some challenges due to atmospheric turbulence, advancements in adaptive optics have helped mitigate these effects. The presence of an atmosphere also offers the advantage of filtering certain wavelengths, allowing astronomers to conduct observations in specific ranges of the electromagnetic spectrum.

Options A, C, and D are not accurate explanations for why large optical telescopes are built on the Earth's surface. The motivation behind constructing such telescopes is primarily driven by scientific goals and the desire to enhance our understanding of the universe through improved light collection capabilities

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Answer:

Radiator

Explanation:

Black bodies are good absorbers of heat, because heat is absorbed by the color black. But they are bad radiators of heat because white radiates heat.

The electric flux through a spherical surface is given by the equation:

Φ = q/ε0 * A, where q is the total charge enclosed by the surface, ε0 is the permittivity of free space (8.85 x 10^-12 F/m), and A is the surface area of the sphere.

Therefore, if r > d (where r is the radius of the sphere, and d is the distance from the charge to the center of the sphere),

If the radius of the sphere is larger than the distance d, then the integral can be calculated as follows:

E flux = ∫ E · dA = ∫ E · (r2 sinθdθdφ) = E · (4πr2)

then the electric flux through the spherical surface would be q/ε0 * 4πr^2, since the surface area of a sphere is 4πr^2.

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Answer:

Friction (traction) is the resistance between things. There's friction between your shoes and the ground. Without enough friction, you can slip and fall.

When you push a heavy box, it pushes back at you with an equal and opposite force (Third Law) so that the harder the force of your action, the greater the force of reaction until you apply a force great enough to cause the box to begin sliding.

When a person trips over a heavy box and falls to the floor, it's due to a combination of factors related to the laws of physics. Here's what happens:

1. Inertia: Every object tends to remain at rest or in uniform motion unless acted upon by an external force. This is Newton's first law of motion. When you're walking and suddenly trip over a heavy box, your body's forward motion is abruptly interrupted by the box. Your lower body and legs might still have forward momentum, causing you to stumble or fall.

2. Force of Gravity:The heavy box you trip over exerts a force of gravity on your body. When you collide with the box, this force pulls you downward, accelerating your fall towards the ground.

3. Friction and Contact Forces: When you trip over the box, there are contact forces and frictional forces involved. Your foot might get caught on the box, and the friction between your foot and the surface of the box can cause your body to tilt forward. As a result, you lose your balance.

4. Center of Mass: Your body's center of mass is the point around which your weight is evenly distributed. When you trip and lose your balance, your center of mass might shift outside your base of support (your feet), causing you to tip over and fall.

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Answer:

YOP

Explanation:

Caught that boy lacking aint no capping had to stand on business

The average power developed by the boy during the climb is approximately 29.4 W.

In physics, the amount of energy transferred or converted per unit time is called power.

total height = number of steps x height of each step

total height = 30 x 0.15 m = 4.5 m

Given, time = 60 s

As power = work done / time

work done = force x distance

force = mass x gravity

mass is boy's mass (40 kg) and gravity is acceleration due to gravity (9.81 m/s²).

force = 40 kg x 9.81 m/s² = 392.4 N

The distance that the boy moves is equal to the total height that he has climbed: distance = total height = 4.5 m

work done = force x distance

work done = 392.4 N x 4.5 m = 1765.8 J

power = work done / time

power = 1765.8 J / 60 s

power ≈ 29.4 W

Therefore, the average power developed by the boy during the climb is approximately 29.4 W.

As for the anomalous behavior of water, water has a higher boiling point and melting point as compared to other substances with similar molecular weight. This is due to the strong hydrogen bonding between water molecules, which requires more energy to break the bonds and change the state of water from solid to liquid to gas.

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Answer:

because the bowling ball has a heavier mass, it will have more energy on the decent

Explanation:

If a block is moving to the left at a constant velocity, one can conclude that the net force applied to the block is zero. Thus, the correct option for this question is C.

Net force may be defined as the addition of all those forces that are significantly acting on an object. It can accelerate a mass. Some other force acts on a body either at rest or in motion.

The principle of the net force is utilized in a system when there is a significant number of forces are applied to the object. If an object is moving with constant velocity, then its acceleration must be zero. This can best be revealed, then look at Newton's second law. If the acceleration is zero, then the net force must also be zero.

Therefore, if a block is moving to the left at a constant velocity, one can conclude that the net force applied to the block is zero. Thus, the correct option for this question is C.

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The outermost energy shell of the atom, where the electrons are situated in relation to the nucleus. the energy levels are-  1 (only"s"), 2 ("s","p"), 3 ("s","p","d"), 4 ("s", "p", "d", "f").

An atom's energy level is the set distance between its nucleus and any potential location for electrons. Additionally, energy levels might be compared to a staircase's steps.

Most major diseases, including heart disease, many types of cancer, autoimmune diseases like lupus and multiple sclerosis, and anemia, commonly manifest with a lack of energy (too few red blood cells). Another typical indicator of depression and anxiety is fatigue. Additionally, a side effect of several drugs is weariness.

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Answer:

A. The angle with which the light passes from glass into water is approximately 31.97°

B. The image formed is, real, inverted, and smaller than the object

C. The image distance is 53.2\(\overline 6\) cm

The image is real

D. The magnification is approximately 0.182

E. The type of lens required is a concave lens which corrects the focus of a powerful eye lens or a long eyeball

Explanation:

The given parameters for the light wave are;

The refractive index of the glass medium, n₁ = 1.5

The angle of incidence of the light, θ₁ = 28°

The refractive index of water, n₂ = 1.33

A. Let θ₂ represent the angle with which the light passes from glass into water

Snell's law is mathematically stated as follows;

n₁·sin(θ₁) = n₂·sin(θ₂)

According to Snell's law, we have;

1.5 × sin(28°) = 1.33 × sin(θ₂)

sin(θ) = (1.5 × sin(28°))/1.33 = 0.52947920615

∴ θ₂ = arcsin(0.52947920615) ≈ 31.97°

The angle with which the light passes from glass into water, θ₂ ≈ 31.97°

B. Please find attached the drawing of the image created with Microsoft Visio

From the drawing, we have that the image formed is real inverted smaller than the object and between the focus and radius of curvature

C. The location of the object from the mirror, u = 94.0 cm

The focal length of the mirror, f = +34.0 cm

The mirror formula for a concave mirror is given as follows;

\(\dfrac{1}{f} = \dfrac{1}{u} + \dfrac{1}{v}\)

Therefore, we have;

\(\dfrac{1}{34.0} = \dfrac{1}{94.0} + \dfrac{1}{v}\)

\(\dfrac{1}{v} = \dfrac{1}{34.0} - \dfrac{1}{94.0} = \dfrac{15}{799}\)

\(\therefore \dfrac{v}{1} = v =\dfrac{799}{15} = 56.2\overline 6\)

The image distance, v = 799/15 = 53.2\(\overline 6\) cm

Therefore the image is in front of the mirror, which is a real image

The image is real

D. The given parameters of the object and lens are;

The distance of the object from the lens, u = 65.0 cm

The distance of the image formed from the lens, i = -18 cm

The magnification, M, is given as follows;

\(M = \dfrac{-v}{u}\)

Therefore;

\(M = \dfrac{-(-11.8)}{65.0} = \dfrac{59}{325} \approx 0.18153846153\)

The magnification, M ≈ 0.182

E. For a person who is near sighted, the light from objects from distant location are almost parallel and are brought to a focus in front of the retina and therefore, they appear blurred

The use of a concave lens is required to correct nearsightedness as it causes the light to appear come from a point before the focus such that the divergent rays of the object refracted through the concave lens comes to a focus at the.

Answer:

200km

Explanation:

Use the formula Distance = speed × time ( transpose the speed formula )

Also remember to converted the minutes into hour because the answer asked for it in Km do this by dividing by 60

Answer:

The answer to that is false

Answer:

False

Explanation:

Answer:

D !!!

Explanation:

Answer:

D

Explanation:

Answer:

The sun and other stars consist of plasma. Plasma is also found naturally in lightning and the northern and southern lights. Human-made plasma is found in fluorescent lights, plasma TV screens, and plasma spheres

Explanation:

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The steel wire that forces the edge of the tire against the rim is called the bead.

The steel wire that forces the edge of the tire against the rim is called the bead. The bead is a critical component of the tire and plays a vital role in ensuring safe and reliable performance. The bead is located at the inner edge of the tire and consists of multiple strands of high-strength steel wire that are coated with rubber.

When a tire is mounted on a rim, the bead is forced against the rim by the inflation pressure inside the tire. This creates an airtight seal that allows the tire to hold air pressure and carry the weight of the vehicle. The strength and durability of the bead are crucial to maintaining this seal and preventing air leakage or blowouts.

The design and manufacture of the bead must meet strict standards and specifications to ensure safe and reliable performance. The wire used in the bead must be of high quality and strength, and the rubber coating must be uniform and resistant to wear, heat, and chemical degradation. Any defects or flaws in the bead can compromise the integrity of the tire and lead to catastrophic failure.

In conclusion, the bead is a critical component of the tire that enables it to maintain inflation pressure and support the weight of the vehicle. Its design and manufacture must meet exacting standards to ensure safe and reliable performance.

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Answer:

B. Time

Explanation:

Answer:

i don`t get it

Explanation: