Give the number of protons and the number of neutrons in the nucleus of each of the following isotopes Aluminum 25 :13 protons and 12 neutrons

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Explanation:

momentum = mass × velocity

mass = 9.11 × 10^-31

velocity = 0.8725 multiplied by c ( which is the speed of light )

therefore velocity = 0.8725 × 3 × 10^8 = 2.6175 × 10^8 m/s

\(m = 9.11 \times 10 {}^{ - 31} \times 2.6175 \times 10 {}^{8} \)

\(m = 9.11 \times 2.6175 \times 10 {}^{ - 31 + 8} \)

\(m = 23.85 \times 10 {}^{ - 23} kgms {}^{ - 1} \)

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Therefore, the frequency of oscillation when the spring is connected 1/5 of the way from the pivot to the end of the rod is approximately 1.34 Hz.

Since the rod is thin and uniform, its moment of inertia about the pivot point can be approximated as:

I = (1/3)ML^2

When the spring is connected 1/5 of the way from the pivot to the end of the rod, the effective length of the rod becomes:

l_eff = l/5 + (4/5)(l/2) = 9l/10

So, the frequency of oscillation is: 8.42 rad (after calculations)

The frequency of oscillation when the spring is connected 1/5 of the way from the pivot to the end of the rod is approximately 1.34 Hz.

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Answer:

Ionic bond

Explanation:

Hope it helps ya

Answer:

b

Explanation:

electric fields is a vector

Answer:

Elements have a characteristic number of electrons and protons.Both Hydrogen(H) and oxygen(O) are two different elements.

••••••••••••••••

Compounds are chemical substances where the atoms atoms of two different elements are combined together. It is made of .Hydrogen(H) and Oxygen(O) both qr4 naturally gases,but they react to form water(H2O),which is liquid compound.

•••••••••••••••

A mixture is made of atleast two parts》 solid,liquid or gas.The difference is that it's not a chemical substance that's bonded by other elements. 

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Hope it helps...

Have a great day!!!

Answer: Elements have a characteristic number of electrons and protons. Both Hydrogen(H) and oxygen(O) are two different elements. Compounds are chemical substances where the atoms atoms of two different elements are combined together. It is made of.Hydrogen(H) and Oxygen(O) both qr4 naturally gases, but they react to form water(H2O), which is liquid compound. A mixture is made of at least two parts solid, liquid, or gas. The difference is that it's not a chemical substance that's bonded by other elements.

Answer:

1) true 2) true 3) true 4) true 5) false 6) false

Explanation:

Explanation: For some reason, it would not let me click the "ADD YOUR ANWER" button, because it stated that my answer had some sort of "Inappropriate" word or something, so instead I attached two images of the answer that I had written down.

The reading on a scale could be less after leaving the top floor and heading downward due to the effect of gravity on the body.

Gravity is a fundamental force of nature that exists between all objects that have mass or energy. It is the force that pulls two objects towards each other, and it is what keeps objects like planets, stars, and galaxies in their orbits.

The force of gravity is directly proportional to the masses of the objects and inversely proportional to the square of the distance between them. This means that the greater the mass of the objects and the closer they are to each other, the greater the force of gravity between them.

Gravity is responsible for many phenomena that we observe in our daily lives, such as keeping us and other objects on the surface of the Earth, causing tides in the ocean, and making objects fall to the ground when we drop them. It is also a key concept in the fields of astronomy and astrophysics, as it is what allows us to understand the motion and behavior of celestial objects in the universe.

Hence, The reading on a scale could be less after leaving the top floor and heading downward due to the effect of gravity on the body.

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The wavelength of a wave is the distance it travels in the direction of propagation over a period of periodic time.

The distance covered by a point on the wave pattern in one unit of time is referred to as wave speed. It specifies the speed at which the wave is travelling through the medium and is frequently measured in figures like meters/second. The distance an object goes in a certain amount of time determines its speed, whether it be an object or a wave.

A wave is what? A wave is an energetic disturbance in a medium that doesn't include any net particle motion. Elastic deformation, a change in pressure, an electric or magnetic intensity, an electric potential, or a change in temperature are a few examples.

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Gaussian surfaces would be the simplest to use to determine the electric field intensity near a long, straight, charged wire, is a cylinder whose axis coincides with the wire.

The Gaussian surface is known as a closed surface in three-dimensional space such that the flux of a vector field is calculated.

Take a uniformly charged straight wire that has a linear charge density λ and Length (L). Make an assumption of a cylindrical Gaussian surface to calculate the electric field. The electric flux across the end of the cylindrical surface would be zero because of the electric field E s circular in direction.

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Ocean tides are caused by the gravitational pull of the Moon and the Sun. The moon has the strongest effect on the tides. When the Sun, Moon, and Earth are in a straight line, we have spring tides. When the Sun, Moon, and Earth are at right angles, we have neap tides. Spring tides are especially high tides while neap tides are especially low tides.

Ocean tides are caused by the gravitational pull of the moon and the sun on the Earth's oceans. The moon has a greater effect on tides than the sun because it is closer to the Earth.

When the Sun, moon, and Earth are in a straight line, we have higher high tides and lower low tides, which are called spring tides.

When the Sun, moon, and Earth are at right angles, we have less extreme tides, which are called neap tides.

Spring tides occur during a full moon and a new moon, while neap tides occur during a first quarter and a third quarter moon. Spring tides are especially strong tides because the gravitational pull of the moon and the sun are working together to pull the oceans in the same direction. Neap tides are weaker tides because the gravitational pull of the moon and the sun are working against each other, which leads to a lesser tidal range.

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answer -

7 m/s^2

Explanation:

it goes 7m/s 14 / 2 = 7

The deceleration will be calculated by dividing the final velocity minus the initial velocity by the time it takes for the velocity to drop.

When we are in a vehicle and feel like we are moving forward relative to the vehicle, we are decelerating. Deceleration is a subset of acceleration that only applies to objects slowing down. It is thus the rate at which an object slows down.

Because acceleration must be reported as a magnitude with a direction, it is a vector. Negative and positive signs are used to indicate direction in one-dimensional motion. Thus, if the signs are negative, the object is slowing down.

It is calculated as follows:

FinalVelocity-InitialVelocityTimetaken = Deceleration

It is denoted by -a, where an is the rate of acceleration.

If the starting velocity, final velocity, and time taken are provided, the Deceleration Formula is as follows:

a = v−ut

If we have the initial velocity, the final velocity, and the distance traveled, we can calculate deceleration as follows:

a = v2–u22s

Where,

-a Deceleration

u Initial velocity

v Final velocity

s Distance

t Time

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The deceleration will be calculated by dividing the final velocity minus the initial velocity by the time it takes for the velocity to drop.

It is calculated as follows:

FinalVelocity-InitialVelocityTimetaken = Deceleration

It is denoted by -a, where an is the rate of acceleration.

If the starting velocity, final velocity, and time taken are provided, the Deceleration Formula is as follows:

a = v−ut

If we have the initial velocity, the final velocity, and the distance traveled, we can calculate deceleration as follows:

a = v2–u22s

Where,

-a Deceleration

u Initial velocity

v Final velocity

s Distance

t Time

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Answer:

the magnitude of the normal force on the book is 25.78N

Explanation:

The computation of the magnitude of the normal force on the book is shown below

Normal force = N is

= mgcosβ

= 2.70 × 9.8 × cos13°

= 25.78N

hence, the magnitude of the normal force on the book is 25.78N

The above formula should be applied

Answer:

just trace a picture of it.

At height h , potential energy of coaster car  having mass m = mgh .

The car will lose potential energy and gain kinetic energy.

height lost by car when it is at the top of loop of radius R

= h - 2R

potential energy lost = mg ( h - 2R )

kinetic energy gained = mg ( h - 2R )

kinetic energy = 0 + mg ( h - 2R )

= mg ( h - 2R )

b )

For the car to remain in contact with the track , if v be the minimum velocity

centripetal force at top = mg

m v² / R = mg

v² = gR

kinetic energy = 1/2 mv²

= 1/2 m x gR

= mgR /

If h be the minimum height that can give this kinetic energy

mg ( h - 2R ) = mgR / 2

h - 2R = R / 2

h = 2.5 R

Therefore, the height of the roller coaster will be 2.5 R.

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Answer:

0.20 Hz

Explanation:

Period formula:

T = 1 / f

rearrange to solve for T (which is period)

F = 1/T

= 1/5.1

= 0.20 Hz

If you want 3 sig figures it would go up to 0.196, but I just rounded to two to get 0.20.

The airplane will strike the ground at a horizontal distance of 490 meters.

To determine how far the airplane will strike on the ground, we need to consider the horizontal distance traveled by the airplane during its flight.

The horizontal distance traveled by an object can be calculated using the formula:

Distance = Speed × Time

In this case, the speed of the airplane is given as 100 meters per second and the time it takes to cover the distance of 490 meters is unknown. Let's denote the time as t.

Distance = 100 m/s × t

Now, to find the value of time, we can rearrange the equation as follows:

t = Distance / Speed

t = 490 m / 100 m/s

t = 4.9 seconds

Therefore, it takes the airplane 4.9 seconds to cover a horizontal distance of 490 meters.

Now, to calculate the distance on the ground where the airplane will strike, we can use the formula:

Distance = Speed × Time

Distance = 100 m/s × 4.9 s

Distance = 490 meters

It's important to note that this calculation assumes a constant speed and a straight flight path. In reality, various factors such as wind conditions, changes in speed, and maneuvering can affect the actual distance traveled by the airplane.

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Answer:

t = 0.22 s

Explanation:

The rate of curvature can be defined as the ratio of the radius of curvature to the time taken to bend the wire to that radius of curvature. Therefore,

v = r/t

where,

v = rate of curvature

r = radius of wire

t = time taken

Here, in our case:

v = 9 units/s

r = 2 units

t = ?

Therefore,

9 units/s = 2 units/t

t = (2 units)/(9 units/s)

t = 0.22 s

Therefore, it takes 0.22 second to bend a straight wire into a circle of radius 2 units

Energy flows from the Sun to producers, then to primary consumers, secondary consumers, and potentially to tertiary consumers, forming a pyramid-shaped structure that represents the transfer of energy through different trophic levels in an ecosystem.

Energy flows in a specific order through various components of an ecosystem, starting with the Sun and progressing through producers and consumers. This flow of energy is known as the energy pyramid or trophic levels.

At the base of the energy pyramid is the Sun, which is the ultimate source of energy for most ecosystems on Earth. Sunlight provides the energy needed for photosynthesis, a process carried out by plants, algae, and some bacteria, collectively known as producers. These organisms convert solar energy into chemical energy through photosynthesis, using carbon dioxide and water to produce glucose and oxygen. This process captures and stores energy in the form of organic compounds.

The next level in the energy pyramid consists of primary consumers, also known as herbivores. These are animals that feed directly on producers, such as grazing animals or insects that consume plants. Herbivores obtain energy by consuming plant material and breaking down the organic compounds present in the plants into simpler forms, such as sugars and amino acids, through digestion.

Above the primary consumers are the secondary consumers, which are carnivores or omnivores that feed on herbivores. They obtain energy by consuming primary consumers and breaking down the organic compounds in their prey through digestion. This energy transfer continues up the trophic levels, with each level consuming the one below it.

At the top of the energy pyramid are tertiary consumers, which are typically apex predators. They are carnivores that consume other carnivores. Tertiary consumers obtain energy by consuming secondary consumers and breaking down the organic compounds in their prey.

It's important to note that energy is not efficiently transferred between trophic levels. Only a fraction of the energy consumed at each level is converted into biomass and passed on to the next level. This inefficiency is due to processes such as respiration, heat loss, and incomplete digestion.

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The average velocity in the following cases are 1.743m/s and 1.22m/s.

To find the average velocity is given by:

V = \(\frac{total distance (d)}{time taken (t)}\)

(a) From the question we are given:

d1 = 73.2m,

d2 = 73.2m,

v1 = 1.22m/s

v2 = 3.05m/s

We need to calculate the time taken to complete each of the distance using the formula:

t = \(\frac{total distance}{speed}\)

t1 = 73.2/1.22 = 60s

t2 = 73.2/3.05 = 24s

The average velocity is the total distance divided by the total time:

Average velocity (V) = (d1 + d2)  / (t1 + t2)

V = 146.4 m / 84 s

Therefore, V = 1.743 m/s (to 3 significant figures)

(b) From the question we are given:

t1 = 1min = 60s,

t2 = 1min = 60s,

v1 = 1.22m/s

v2 = 3.05m/s

We need to calculate the distance covered for each of the time using the formula:

d1 = velocity * time = v1 * t1 = 1.22 * 60 = 73.2m

d2 = velocity * time = v2 * t2 = 3.05 * 60 = 183m

The average velocity is the total distance divided by the total time:

Average velocity (V) = (d1 + d2)  / (t1 + t2)

V = (73.2 + 183)/ (60 + 60)

V = 256.2/120 = 2.135m/s

Therefore, the average velocity (V) is 2.135m/s (to 3 significant figures)

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The gauge pressure at point B is 11.5 KPa

From continuity equation

Velocity of water at B = (2*pi*3^2)/[2*pi*1^2] =9 m/s

then from Bernoulli equation

v^2 /2  + φ + p/ρ =constant

ρ=1000 kg/m^3

3^2/2 +φ +50000/1000 = 9^2/2 +φ +P/1000

pressure at B = 11.5 KPa

Pressure measured in relation to atmospheric pressure is known as gauge pressure. When the atmospheric pressure is above a certain level, the gauge pressure is positive; when it is below that level, it is negative. In actuality, air pressure raises the pressure in any fluid that isn't contained by a hard container. Pascal's principle. is the reason. why this occurs. In relation to atmospheric or barometric pressure, gauge pressure is referred to. In a perfect vacuum of space, there is no matter, hence the pressure is known as absolute pressure.

The most popular measures for measuring vacuum are torr (millimeter of mercury), micron (micrometer of mercury), and inch of mercury (inHg). While the units of torr, micron, and inHg often denote absolute pressure, inHg typically denotes gauge pressure.

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Answer:

Agricultural Engineer.

Agricultural Food Scientist.

Agricultural Inspector.

Agricultural Manager.

Agricultural Specialist.

They are;

The theories change over time because new information and technology may be developed that influence the theory. Therefore, option B is correct.

As new information and perspectives become available, established theories may be changed or refuted. If a new or modified theory explains all the old theory did and then some, scientists are likely to accept it.

When fresh data emerges that refutes an existing theory, scientific theories can be revised or replaced. All scientific theories are founded on observable, testable data, and they can be changed when new information is found that contradicts the present idea.

When certain features of a hypothesis are refuted by fresh experimental data, a theory might be altered in science.

Thus, option B is correct.

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Answer:

\(\boxed {\boxed {\sf a\approx -0.08 \ m/s^2}}\)

Explanation:

Acceleration can be found by dividing the change in velocity by the time.

\(a=\frac{v_f-v_i}{t}\)

The final velocity is 3 meters per second. The initial velocity is 8 meters per second.

We need to convert the time to seconds.

So, we know that:

\(v_f=3 \ m/s \\v_i= 8 \ m/s\\t= 60 \ s\)

Substitute the values into the formula.

\(a=\frac{3 \ m/s - 8 \ m/s}{60 \ s}\)

Solve the numerator.

\(a=\frac{-5 \ m/s}{60 \ s}\)

Divide.

\(a=-0.0833333333 \ m/s/s\)

Let's round to the nearest hundredth.

The 3 in the thousandth place tells us to leave the 8 in the hundredth place.

\(a\approx -0.08 \ m/s^2\)

The cyclist's acceleration is about \(\boxed {-0.08 m/s^2}\)

The missing square in the given sequence is a large dot without circle.

option C.

A sequence refers to an ordered collection of objects, typically numbers or other mathematical entities, arranged in a specific order according to a well-defined rule. Each object in the sequence is called a term or an element of the sequence.

In the given sequence, we can notice that it alternates between two circles and a circle.

From the first sequence, it has 2 circles and large dot, the second has one circle and a dot.

The third sequence has a small circle and a larger dot, so the next sequence will have no circle and a large dot.

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Answer:The television

Explanation:

With the application of resolution of vectors, the horizontal velocity is 23.99995 m/s

Uniform speed is also known as constant speed. This can be defined when the distance travel by an object per time taken is constant.

Given that a truck travels up a hill with a 6.9" incline. The truck has a constant speed of 24 m/s.

First convert minute to degree.

1 minute = 0.0166667

6.9 minute = 6.9 × 0.016667 = 0.115 degree

The formula for the horizontal component of the truck's velocity will be UcosФ, while the vertical component is UsinФ

Substitute all the parameters into the equation.

Horizontal velocity = 24cos 0.115 = 23.99995 m/s

Therefore, the horizontal component of the truck's velocity will be 23.99995 m/s which can be approximated to 24 m/s

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Answer:

The second chart seems to be correct

Explanation: