Answer question in the photo

The force required to lift the whale shark is given as 25000 N, and its acceleration is 1.25 m/s^2. We can use Newton's second law of motion, which states that the force (F) applied on an object is equal to the product of its mass (m) and acceleration (a), i.e. F = ma.

Rearranging the equation to solve for the mass, we get:

m = F/a

Substituting the given values, we get:

m = 25000 N / 1.25 m/s^2

m = 20000 kg

Therefore, the mass of the whale shark is approximately 20,000 kg.

Answer:

Explanation:

Before the collision, the lorry has a momentum of:

p1 = m1v1 = 8000 kg * 20 m/s = 160000 kgm/s

where m1 is the mass of the lorry and v1 is its velocity.

The car is initially at rest, so its momentum is:

p2 = m2*v2 = 0

where m2 is the mass of the car and v2 is its velocity.

After the collision, the two vehicles move together with a common velocity v. The total momentum of the system after the collision is:

p = (m1 + m2)*v

where m1 + m2 is the total mass of the system.

By the law of conservation of momentum, the total momentum before and after the collision is the same. So we have:

p1 + p2 = p

Substituting the values we have:

160000 kg*m/s + 0 = (8000 kg + 1000 kg)*v

Simplifying:

v = (160000 kg*m/s) / (9000 kg)

v = 17.78 m/s

Therefore, the velocity of the lorry and car together after the collision is 17.78 m/s.

1) The wavelength of the sound wave is 11cm.

2) The frequency of the sound wave is 3118.18.

3) The length of the air column is 35.75cm.

What is frequency and its unit?

The quantity of full oscillations made by any wave element in a unit of time is known as the frequency of a sinusoidal wave. A parameter that describes the rate of oscillation and vibration is called frequency. Hertz is the SI unit for frequency. One full oscillation per second corresponds to one hertz (Hz).

Therefore, The wavelength of the sound wave is 11cm, The frequency of the sound wave is 3118.18 and The length of the air column is 35.75c

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Farming or agriculture by humans had great impact on the population in certain areas. Farming created a facile environment for people get into a developing life and the areas feasible for cultivation were populated more.

Human populations have frequently rebuilt their subsistence niches, altering both their food sources and living environments. For instance, most human populations changed from foraging to engaging in various forms of agriculture over the past 12,000 years.

It is well known that the transition to agriculture had an impact on a number of areas of human biology and demography, including mortality risk, population growth, adult body size, and physical indicators of health.

The reasons why populations tended to grow in size at times when indices of health declined are poorly understood since these tendencies have not been included in a comprehensive conceptual framework. All these are significant changes after the generation of an agricultural society.

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The refractive index of the liquid, given that the depth is 4 cm and the coin appears to be 3. 5 cm is 1.2

Refractive index is related to real depth and apparent depth according to the following formula:

Refractive index = Real depth / Apparent depth

With the above formula, we can obtain the refractive index as illustrated below:

Refractive index = Real depth / Apparent depth

Refractive index = 4.2/ 3.5

Refractive index = 1.2

Thus, the refractive index is 1.2

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Answer:

a yellow book

Explanation:

red has the longest wavelength so most wavelength to least wavelength goes in the order- red, orange, yellow, green, blue, indigo, violet

yellow has the longest wavelength in the gvn options thus its the answer

Answer:

hi

Explanation:

there is the answer

hope it helps

good luck

Answer:

V = 2 π R / T        speed V where T is period

T = 2 π R / V     = 2 π * .2 m / 1.5E5 m/s = 8.38E-6 sec

Period = 8.36 * 10-6 sec

Using Coulomb's Law, the force between two charges is given by:

F = k * q1 * q2 / r^2

Where k is Coulomb's constant (9.0 x 10^9 N*m^2/C^2), q1 and q2 are the charges, and r is the distance between the charges.

Substituting the given values, we have:

F = (9.0 x 10^9 N*m^2/C^2) * (8.0 x 10^-9 C) * (2.0 x 10^-3 C) / (0.80 m)^2

F = 36 N

Therefore, the force between the two charges is 36 N.

What is Coulomb's law?

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The swimmer will cover a distance of 818.4 meters in 372 seconds, swimming at speed of 2.2 m/s.

The magnitude of change of its position over time or the magnitude of change of its position per unit of time is called speed.

We use this formula: distance = speed x time

speed is the swimmer's speed, and time is the time she swims for.

Substituting the given values, we get: distance = 2.2 m/s x 372 s

Calculating the product, we obtain:

distance = 818.4 meters

Therefore, the swimmer will cover a distance of 818.4 meters in 372 seconds, swimming at a speed of 2.2 m/s.

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The weight of the crate moved vertically is 40.9 Newton.

To solve this problem, we can use the formula for work done, which is:

Work done = force × displacement

Where force is the weight of the crate, distance is the vertical distance moved.

We can rearrange the formula to solve for the weight of the crate:

Force = work / displacement

Given that;

Plugging in the values, we get:

Force = work / displacement

Force = 450 J / (11 m )

Force = 40.9 N

Therefore, the weight of the crate is 40.9 N.

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Force is the influence that causes the stir of an object with mass to change speed, i.e. accelerate.

The equations τ = r Fsinθ show that the torque can be written in three ways. It can be the product of the force, the switch arm and the sine of the angle between them.

Can be the product of the force and the element of the switch arm vertical to the force. It can also be written as the product of the switch arm and the force vertical to the switch arm.

The computation shows that the three dyads are equal. Expressions include

80N)(5.0 m)( sin 37 ∘)).

48N)(5.0 m).

80N)(3.0 m).

Force is an external factor that can change a body's state of rest or motion. It has size and direction. The direction in which the force is applied is known as the force direction, and the force impact is where the force is applied.

Question

Consider the force F = 80N applied to the ray as shown in the figure below. The length of the ray is ℓ = 5.0 m and θ = 37 ∘, so x = 3.0 m and y = 4.0m.

Which of the following statements gives the correct moment generated by the force F → about the point P?

Which of the following expressions gives the correct torque produced by a force about a point?

80 N)(5.0 m).

48 N)(5.0 m)( sin 37 ∘).

80 N.

80 N)(5.0 m)( sin 37 ∘)).

48 N)(5.0 m).

80 N)(4.0 m).

80 N)(3.0 m).

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Answer:

Explanation:

Given :

We need to find the frequency of the wave

Using formula:

Where,

On substituting the required values, we get:

[tex] \dashrightarrow \sf \: F = \dfrac{80}{0.3} \\ \\ \dashrightarrow \sf \: F = 266.6 \: Hz[/tex]

Therefore,

Greater in size than that of the second star is the first star. If Chaya looks at the information for two stars. They are both the same hue, yet the first star is brighter overall than the second.

A star's absolute magnitude, M, is the magnitude it would have if it were situated 10 parsecs away from Earth. Astronomers might compare the true (intrinsic) brightness of various stars by taking into account stars at a given distance.

More powerful (or greater wattage) stars will glow brighter than less powerful ones (lower wattage). Nevertheless, that because a star appears brighter doesn't always imply it is. The brilliance of a star is also influenced by how close to us it is. An thing seems darker the further it is away.

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The pith balls are having same charge and that is why they are held apart by the force of repulsion. When they both touched by the experimenter's finger they both gets attracted to the finger and comes in contact as in B.

Electrostatic force between two charges are arise when the charged bodies comes in contact. There are both force of attraction and repulsion. The electrostatic force of attraction results from the two unlike charges and the force of repulsion arise between two like charges.

Here, the pith balls are charged alike, hence they will get repelled. Ig they are negatively charged, the electrons will flow from them to the other body in touch.

When the experimenter touch his finger on the charged ball, the finger gets polarized and attracted to the ball , they gets in contact as in figure B.

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Answer:

its because the modern model of our solar system is much more updated to the Ptolemy's model

The metric units with these measurements is force: Newton

Metric units are a type of measurement system based on the meter, kilogram, and second. It is the most widely used system of measurement in the world and is used by most countries. Metric units are based on a decimal system, which means that each unit is a multiple or fraction of 10, and is defined in relation to a basic unit. For example, the meter is defined as the distance traveled by light in a vacuum in 1/299,792,458 of a second. Other metric units, such as the liter, are defined as multiples of the basic unit.

distance: meter

work: joule

power: Watt

energy: joule

time: second

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Governments assist in enhancing the infrastructure necessary for companies to flourish and helps business provide the goods and services that people need and want.

What is economics?

Economics is the study of how limited resources are used to create outputs, such as commodities and services, that are then distributed among individuals. Resources serve as the resources for creating outputs. Products and services are created by combining resources. The necessary raw ingredients are provided by land and natural resources. Raw materials are turned into finished products and services by labor.

Businesses perform better when they can effectively transport raw materials to factories and deliver finished goods to plants and markets. Governments assist in enhancing the infrastructure necessary for companies to flourish. Roads, bridges, rail lines, airports, seaports, energy transmission lines, and telecommunications networks are all included in this.

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In Maths finding the square root of a number is the opposite of squaring a number. The square root of the square of a positive number gives the original number. The Square root of 2.56 is 1.6.

The square root of a number can be defined as the factor which we can multiply by itself to get that number. The symbol used to represent the square root is √.

The square root of any number can be found out without using calculator by using long division method. Here the square root of 2.56 is 1.6. Divide, multiply, subtract, bring the next number and repeat. These are the steps of it.

√2.56 = 1.6

The long division method of 2.56 is attached here.

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Answer:

the answer is decreases,decreases

Vector diagram B will result in the largest resultant vector. Correct option is B.

Vector is a mathematical quantity which has both magnitude as well as direction. Force, displacement, velocity & acceleration etc. are the examples of vectors. Vectors are denoted by a standard letter and an arrow upon it.

The resultant(R) of two vectors R1 and R2 having angle θ between them are given by,

R² = R₁² + R₂² + 2R₁R₂cosθ

A) in this diagram single vector is there,

so R = R₁

B) in this diagram two vectors are in same direction with zero angle between them. (Cos0 = 1)

R² = R₁² + R₂² + 2R₁R₂

C) & D) In these diagrams two vectors are in opposite direction with zero angle between them. (Cos180 = -1)

R² = R₁² + R₂² - 2R₁R₂

Looking at B Two vectors will be added each other and give largest resultant vector.

Hence Option B is correct.

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An atom is said to be electrically neutral when the number of protons and the number of electrons is equal.

Protons are positively charged particles and electrons are negatively charged particles. If atom losses or gains one more electron then it is said to become an ion. Atoms may gain or lose electrons to increase their stability. A neutral atom has no charge. The positive and negative charges cancel out each out and create a balance. Basically for an atom to be electrically neutral it must have exactly one electron for every proton. Protons are present in the nucleus of an atom and electrons revolve around the center of the nucleus.

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Answer:

The answer is definitely A

Answer:

a. time of flight = 4.285 s

b. horizontal distance reached = 214.25m

c. final velocity = 65.3m/s, at 40° downwards

Explanation:

This is a projectile motion question.

Things to note, in all projectile motion questions:

In projectile motion questions, we will use the three equations of motion:

[tex]v=u+at\\v^2=u^2+2as\\s=ut+\frac{1}{2}at^2[/tex]

Thus we can adjust our equations for the x - component:

[tex]v=u\\s=ut[/tex], since acceleration = 0

For the y - component:

[tex]v=u-gt\\v^2=u^2-2gs\\s=ut-\frac{1}{2}gt^2[/tex], since acceleration = gravity (9.8 m/s²), downwards.

Now, with our question, we can note: u(x) = 50m/s, and u(y) = 0, since, initially, only horizontal motion. Also, s(y) = - 90m.

(a) After how many seconds will it strike the plain at the foot of the cliff?

In this question, we are asked to find time of flight, 't'. As we have s(y), u(y), and g, we can use the third equation, [tex]s=ut-\frac{1}{2}gt^2[/tex] to find t.

Since u=0, thus, - 90 = -1/2×9.8×t². solving this algebraically, therefore, time of flight = 4.285 s.

(b) At what distance from the foot of the cliff will it strike?

Now, we need to find the horizontal distance or range. All we can use to do this is s = ut. Since we know that u=50m/s, and t=4.285s, this will be easy. s = (50)(4.285) = 214.25 m.

Therefore, horizontal distance reached = 214.25m.

(c) With what velocity will it strike the ground?

In this part, we need to find final velocity. Final velocity = the resultant vector of both the x and y velocity components. [tex]v=\sqrt{(v_x)^2+(v_y)^2}[/tex].

Since horizontal velocity is constant, u = v, and therefore, v(x) = 50m/s.

For vertical velocity, we can use [tex]v^2=u^2-2gs[/tex]. u(x) = 0, and s(y) = -90m.

Therefore, v² = -2(9.8)(-90). final vertical velocity is thus 42m/s.

Now final velocity = √(50² + 42²) ≈ 65.3 m/s.

Lastly, we need to remember to calculate direction, since velocity is a vector quantity. the direction of velocity (θ) [tex]=tan^{-1}(\frac{v_y}{v_x})[/tex]

Therefore, θ = 40°.

Therefore, final velocity = 65.3m/s, at 40° downwards.

Explanation:

If both charges are positive, the force will be positive; similarly, if both charges are negative, the force will be positive.

If one charge is positive and another is negative, the force will be negative.

The correct answer is "positive; negative". According to Coulomb's Law, the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. The force is attractive if the charges are of opposite sign (one positive and one negative), and repulsive if the charges are of the same sign (both positive or both negative). Therefore, when one charge is positive and another is negative, the force between them is attractive, while when both charges are positive or both are negative, the force between them is repulsive.