4
(a) Which arrow shows the amplitude of the wave?
(1 mark)​

Potential energy is the energy that an object has based on its position is true .

What is the name for the potential energy created when an item contracts or expands?

Elastic potential energy is the potential energy resulting from an object's form. When a force stretches or compresses an elastic substance, this energy is produced. The potential energy of an item increases with the amount it is compressed or stretched.

Potential energy is a form of accumulated energy that is dependent on the relationship between different system components. When a spring is compressed or expanded, its potential energy increases. If a steel ball is raised above the earth as opposed to falling to the ground, it has more potential energy.

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I do not know

hi I thinks the answer is Tralse

Answer:

a + b = c      where a and b and c are vector quantities

Since c is the result of adding vector b to vector a (to add two vectors the vectors are connected head to tail)

a^2 + b^2 - 2 ab cos θ = c^2 is an expression of such a relationship

Note that a^2 + b^2 = c^2 if a and b are at right angles to one another

Another way to express this is:

a x + b x = c x    where a and b are the x-components of a and b

a y + b y = c y      describes the y -components of a and b

The above two equations will provide the x and y components of vector c

To find:

Which of the planets has the highest density.

Explanation:

Neptune is known as the ice planet. It has a higher density than gas giants but a lower density than rocky planets. The density of the Neptune is 1638 kg/m³.

Jupiter is known as a gas giant. Gas giants has the lowest densities. The density of Jupiter is 1326 kg/m³.

The Earth and the Mercury are rocky planets. The densities of rocky planets are more than that of the gas giants and ice giants. The density of the Earth is 5514 kg/m³ and the density of the Mercury is 5429 kg/m³.

Final answer:

On comparing the densities of the planets, the Earth has the highest density.

Thus the correct answer is option C.

Answer:

25

Explanation:

sin(30) = x/50

x = 25

Explanation:

Given data

velocity v= 25m/s

The time it takes to put on brake t= 0.3s

the distance covered when the  brake was put on is

v=s/t

s= v*t

s= 25*0.3s

s= 7.5m

hence the distance covered is 7.5m

Also the rate of decrease in aceleration is 5m/s^2

we can also calculate the distance covered at this rate

v^2=u^2+2as

25^2= 0+2*5*s

625=10s

divide both sides by 10

s=625/10

s= 62.5m

The total  distance covered between putting on the brakes and decelareation is  7.5+62.5= 70m

Given that the tree is 75m ahead, the car would not hit the tree

Answer:

c. postive

Explanation:

All physical objects are made up of atoms. Inside an atom are protons, electrons and neutrons. The protons are positively charged, the electrons are negatively charged, and the neutrons are neutral.

Therefore, all things are made up of charges. Opposite charges attract each other (negative to positive). Like charges repel each other (positive to positive or negative to negative). Most of the time positive and negative charges are balanced in an object, which makes that object neutral.

Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. One way to discharge them is through a circuit.

Hope this helps, have a nice day/night! :D

Answer:

C

Explanation:

C because if you build anything up it remains the same.

The x-component of the dog's velocity at time t2 = 23.8 s is 0.42 m/s.

The x-component of the dog's velocity at time t2 = 23.8 s can be calculated using the formula Vx = Δx / Δt, where Vx is the x-component of the dog's velocity, Δx is the change in the dog's x-position, and Δt is the change in time. To calculate the x-component of the dog's velocity at time t2 = 23.8 s, we need to know the dog's x-position at time t1 and time t2. Once we have this information, we can plug it into the formula to calculate the x-component of the dog's velocity.
For example, if the dog's x-position at time t1 = 0 s is 0 m and the dog's x-position at time t2 = 23.8 s is 10 m, then the change in the dog's x-position (Δx) is 10 m - 0 m = 10 m. The change in time (Δt) is 23.8 s - 0 s = 23.8 s.

Plugging these values into the formula gives us:

Vx = Δx / Δt = 10 m / 23.8 s = 0.42 m/s

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When two charged plates are separated by a distance, the potential difference between the plates is 54 Volts.

The electric field intensity which does not increase or decrease with time or remain constant is called the uniform electric field.

Given is the plates separated by distance d = 15 cm =0.15 m, electric field E= 360 N/C.

The relation between the electric field and voltage is

E=V/d

Substitute the values into the expression to get the potential difference V,

V = 360 x 0.15

V = 54 Volts

Thus, the potential difference between the plates is 54 Volts.

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The food substance being used which turned Fehling's solution to brick red is a reducing sugar.

This is an indicator which is used to test for the presence of reducing sugar or aldehydes in a solution.

Brick red precipitate of copper(I) oxide is formed when it tests positive to compounds such as glucose etc.

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Answer:

\(t=20\:sec\)

Explanation:

\(1 \:Watt\:=\:\frac{1\:Joule}{sec}\\\\sec\:=\:\frac{No.\:of\:Joules}{No.\:of\:Watts}\\\\t=\frac{600}{30}\\\\t=20\:sec\)

Best Regards!

The period of time would be 20 seconds during which the 600 Joules  is provided to the 30 Watts light bulb .

The rate of doing work is known as power . The Si unit of power is the watt .

Power on light bulb = work done / time period in seconds

As given in the problem statement we have to find the period of time , in seconds , during which the 600 Joules  is provided to the 30 Watts light bulb,

The Time period = The work done by the bulb / power used by the bulb .

                            = 600 Joules / 30 watts

                            = 20 seconds

Thus, the 600 Joules would be given to the 30 Watts light bulb during a 20 second period of time .

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Dalton's first theory states, that all matter is made up of atoms (which cannot be divided). Continuing with this theory in mind, Dalton also states that all atoms of an element are identical in MASS and PROPERTIES. Lastly, compounds are combinations of TWO or MORE different types of atoms.

With Dalton's reasoning, water contains two atoms of hydrogen and one atom of oxygen; All water molecules are exactly like every other water molecule, and have the same 2:1 ratio.

Hope this helps!

-Moiselle

According to the conservation of angular momentum, if an ice-skater starts spinning with her arms out wide, and then slowly pulls them close to her body, this will cause her to spin faster. The conservation of angular momentum states that the total angular momentum of a system remains constant as long as no external torque acts on it. This means that if a spinning object pulls its arms closer to its body, its rotational speed will increase.

This is because the moment of inertia of the system is reduced as the mass is brought closer to the axis of rotation. Since the angular momentum of the system must remain constant, an increase in rotational speed must occur to compensate for the decrease in moment of inertia. The principle of conservation of angular momentum can be observed in many physical systems, such as figure skating, where an ice skater spinning with her arms extended can increase her rotational speed by pulling her arms closer to her body. This is because the total angular momentum of the skater is conserved, and the decrease in moment of inertia is compensated by an increase in rotational speed.

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Answer:

the time with the force combined divided by time times the force

Answer:

Explanation:

In this problem, we are expected to solve for the total distance covered by the person, and the person's displacement.

a) what is his distance?

this can be gotten by summing up all the individual distances covered by the person

total distance= 15+10

total diastance= 25 km

b) what is the person's displacement?​

the displacement is the distance measured away from a point

this can be gotten by subtraction the final distance/point from the initial distance/point

displacement= 25-10

displacement= 15km

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The correct answer is centripetal force keeps electrons in orbit around the nucleus.

What is Rutherford model?

Rutherford Atomic Model - J. J. Thomson's "plum pudding" model was unable to account for some experimental findings related to the atomic structure of elements. British scientist Ernest Rutherford carried out an experiment, and using the results of this experiment, he proposed Rutherford's Atomic Model and explained the atomic structure of the elements.

Thus, in the Rutherford model, the centripetal force that maintains the electron in orbit is produced by the electrostatic attraction between the (positive) nucleus and the (negative) electron.

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Centripetal refers to “center-seeking” Quantifies the change in directionof the velocity The acceleration is directed toward the center of the circle of motion.

The magnitude of the centripetal acceleration is given by V^2/r, the direction is toward the center of the circle. The tangential component of the acceleration is due to changing speed. The centripetal component of the acceleration is due to changing direction.

When an object is rotating at a constant angular velocity, the whole object has a constant angular velocity. Therefore, every mint on the turntable has the same, constant angular velocity.

The acceleration which causes the tangential velocity to change direction is called Centripetal acceleration. Centripetal acceleration is always in toward the center of the circle.

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Answer:

The amount of energy in a wave and the amplitude depends on the force applied.

Explanation:

The amount of energy in a wave is directly related to the amplitude means if the the amount of energy in a wave increases, the amplitude of that wave also increases whereas if the the amount of energy in a wave decreases the amplitude of the wave also decreases. If you jump into the pool from a higher elevation, increase occur in the amount of energy in a wave and also higher the amplitude while on the other hand, slower movement in the pool leads to smaller wave energy and lower amplitude.

When you remove the lid from a food container that has been left in a freezer for several months, the cold air inside the container causes the moisture inside the container to freeze onto the underside of the lid.

Food container that has been left in a freezer for several months we  discover a large collection of ice crystals on the underside of the lid this is due to the formation of a layer of ice crystals as the water vapor in the container condenses and freezes onto the cold surface of the lid. This process is known as sublimation and is why you find a layer of ice crystals on the underside of the lid.

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That depends on what word you skipped at the beginning of the question.

If it's supposed to be "Potential" energy, then the statement is false.**

If It's supposed to be "Kinetic" energy, then the statement is true.

** It's also false if the missing word is "Chemical", "Mechanical", "Thermal", "Nuclear", "Electrical", "Electromagnetic", or "Nervous".)

Answer:0

Explanation:

0

The angle of refraction θ₂ is 73.3°. Since θ₂ is less than 90 degrees, the ray will refract.

To determine whether the ray will reflect internally or refract into the air at the boundary between flint glass (n = 1.61) and glycerol (n = 1.47), we can use Snell's law. Snell's law relates the angles of incidence and refraction at an interface between two different media.

Snell's Law is given as;

n₁ × sin(θ₁) = n₂ × sin(θ₂)

where:

n₁ and n₂ are refractive indices of two media,

θ₁ is the angle of incidence, and

θ₂ is the angle of refraction.

In this case, the ray is traveling from flint glass (n₁ = 1.61) to glycerol (n₂ = 1.47). The incident angle is given as 68.9 degrees.

To determine whether the ray will reflect or refract, we need to compare the angle of refraction (θ₂) to 90 degrees. If θ₂ is greater than 90 degrees, the ray will reflect internally. If θ₂ is less than 90 degrees, the ray will refract.

Let's calculate the angle of refraction (θ₂) using Snell's law:

n₁ × sin(θ₁) = n₂ × sin(θ₂)

1.61 × sin(68.9°) = 1.47 × sin(θ₂)

0.996 = 1.47 × sin(θ₂)

sin(θ₂) = 0.996 / 1.47

θ₂ ≈ 73.3°

Since θ₂ is less than 90 degrees, the ray will refract.

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Answer:

17.3 m/s  (1 d.p.)

Explanation:

Kinetic Energy

\(E_k=\sf \dfrac{1}{2}mv^2\)

where:

Gravitational potential energy

\(E_p=\sf mgh\)

where:

Principle of Conservation of Energy

Gravitational potential energy at the top = kinetic energy at the bottom

\(\implies \large \text{$ E_{p \sf (top)}=E_{k \sf(bottom)} $}\)

Given:

The gravitational field strength of the Earth is 10 N/kg (10 newtons per kilogram), therefore:

Substituting the values into the formula and solving for v:

\(\implies \large \text{$ E_{p \sf (top)}=E_{k \sf(bottom)} $}\)

\(\implies \sf mgh=\dfrac{1}{2}mv^2\)

\(\implies \sf (5.0)(10)(15)=\dfrac{1}{2}(5.0)v^2\)

\(\implies \sf 750=\dfrac{5}{2}v^2\)

\(\implies \sf v^2=300\)

\(\implies \sf v=\sqrt{300}\)

\(\implies \sf v=17.3\:\: m/s \:\: (1\:d.p.)\)

Apply law of conservation of energy

Complete Question:

The length, breadth and height of an object are 20 cm, 15 cm and 25 cm respectively. Its mass is 7 kg. Find its volume and density

Answer:

a. Volume of cuboid = 7500 cm³

b. Density = 0.000933 Kg/cm³

Explanation:

Given the following data;

a. To find the volume of the object.

An object that has a length, breadth and height is a cuboid.

Mathematically, the volume of a cuboid is given by the formula;

Volume of cuboid = length * breadth * height

Substituting into the formula, we have;

Volume of cuboid = 20 * 15 * 25

Volume of cuboid = 7500 cm³

b. To find the density of the object;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the formula;

\( Density = \frac {mass}{volume} \)

Substituting into the formula, we have;

\( Density = \frac {7}{7500} \)

Density = 0.000933 Kg/cm³

Answer:

c

Explanation:

becaz its motion and without motion u cant get friction

Answer:

A

Explanation:

hope this helps

The resulting amplitude when they meet is 4 units.

Amplitude is a term used in various fields including physics, engineering, and audio technology, with different meanings in each context. In physics and engineering, amplitude refers to the maximum displacement or magnitude of a wave or oscillation from its rest position. For example, in a sound wave, the amplitude is the maximum displacement of the air molecules from their average position, and it determines the loudness of the sound. In light waves, amplitude refers to the maximum intensity of the light wave, which determines its brightness. In audio technology, amplitude refers to the strength or volume of a sound wave. In digital audio, amplitude is typically represented by a numerical value and is used to control the volume of a sound.

As both are amplitude and one overlaps each other, the amplitude formula doesn't apply, we can simply multiply the waves

2 × 2

= 4

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Answer:

which class or course

Explanation:

please tell