According to Newton's Second Law of Motion, an object will accelerate if you apply what kind of force? Question 1 options: Frictional force Inertial force Balanced force Unbalanced force.

The following options are types of electromagnetic waves:

Visible light, X-rays, and TV signals

The correct options are A, B & C.

Electromagnetic waves are a type of energy that travels through space, carrying energy from one place to another without requiring a medium to travel through. These waves are composed of oscillating electric and magnetic fields that propagate at the speed of light.

A. Visible light: This is the portion of the electromagnetic spectrum that is visible to the human eye. It ranges from approximately 400 to 700 nanometers in wavelength and includes colors such as red, orange, yellow, green, blue, indigo, and violet.

B. X-rays: X-rays are a high-energy form of electromagnetic radiation with wavelengths shorter than ultraviolet light. They are commonly used in medical imaging, as they can penetrate through soft tissue and produce images of bones.

C. TV signals: These are electromagnetic waves that are used to transmit television signals from one place to another. They have wavelengths in the range of several meters to several centimeters.

D. Electric fields: Electric fields are not electromagnetic waves themselves, but they can be produced by electromagnetic waves. An electric field is a force field that surrounds an electric charge and exerts a force on other charges in its vicinity.

In conclusion, visible light, X-rays, and TV signals are all examples of electromagnetic waves, while electric fields are not waves themselves but can be produced by them. Electromagnetic waves have a wide range of applications in fields such as medicine, communications, and energy production.

Thus, A, B & C are correct options.

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The correct statement of Newton's Second Law is: An object's acceleration is inversely proportional to its mass and proportional to the net force acting on it.

Newton's Second Law of Motion states that the force acting on an object is directly proportional to the mass of the object and its acceleration. In other words, the greater the force applied to an object, the greater its acceleration, and the greater the object's mass, the less it will accelerate for a given force.

This law is often expressed mathematically as F = ma, where F is the force applied to an object, m is the object's mass, and a is its acceleration.

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Explanation:

In a battery-operated radio, energy is transformed from chemical energy stored in the batteries to electrical energy, which is then used to power the radio's electronic components and produce sound through the speakers. The electrical energy from the batteries is used to power the radio's circuits and drive the movement of the speakers' diaphragm, which produces sound waves. This process is known as electro-mechanical energy transformation.

Answer:

from mechanical to sound energy

The planet with the highest wind speeds in its atmosphere is Jupiter.

A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighboring region of planetesimals. The eight planets in our Solar System are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. There are also several dwarf planets, such as Pluto, Ceres and Eris.

The winds on Jupiter can reach speeds of up to 1,500 miles per hour, and are the fastest in the solar system. These winds are caused by the planet's incredibly strong gravity, and can create storms that can last for years. The winds are also believed to be responsible for the planet's iconic stripes, which are created by the swirls of clouds created by the winds. The wind speeds on Jupiter are about five times the speed of Earth's strongest hurricanes.

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Answer:

The sound waves from a radio speakers

Explanation:

Adding the same amount of electrons to two positively charged objects would result in a decrease in the electric force between them.

This is because electrons have a negative charge, and adding electrons to the positively charged objects would neutralize some of their positive charge. As a result, the net positive charge on each object would decrease, leading to a weaker electric force between them.

In the case of two negatively charged objects, adding the same amount of electrons to each object would actually increase the electric force between them. This is because electrons repel each other due to their like charges. By adding more electrons to each object, the negative charges would intensify, leading to a stronger repulsive force between the objects.

For two objects that have no charge, adding electrons to each object would also result in an increase in the electric force. This is because the electrons would introduce a negative charge to each object, leading to a repulsive force between them.

Only for two objects that have opposite charges would adding the same amount of electrons to each object result in a decrease in the electric force. By adding electrons to one object, its negative charge would increase while the positive charge on the other object remains the same. The increased repulsive force due to the greater negative charge would outweigh the attractive force between the opposite charges, resulting in a net decrease in the electric force between the objects.

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To calculate the underwater angles of refraction for the red and blue light, we can use Snell's law, which states:

n1 * sin(theta1) = n2 * sin(theta2),

where n1 and n2 are the indices of refraction of the initial medium and the final medium, respectively, and theta1 and theta2 are the angles of incidence and refraction, respectively.

Let's calculate the underwater angles of refraction for the red and blue light separately:

For red light:

n1 (air) = 1 (approximate value)

n2 (water) = 1.331 (given)

theta1 (angle of incidence) = 83.0 degrees

Using Snell's law:

1 * sin(83.0 degrees) = 1.331 * sin(theta2_red).

Rearranging the equation:

sin(theta2_red) = (1 * sin(83.0 degrees)) / 1.331,

Taking the inverse sine:

theta2_red = arcsin((1 * sin(83.0 degrees)) / 1.331).

Calculating theta2_red:

theta2_red ≈ arcsin(0.856) ≈ 58.83 degrees.

So, the underwater angle of refraction for red light is approximately 58.83 degrees.

For blue light:

n1 (air) = 1 (approximate value)

n2 (water) = 1.340 (given)

theta1 (angle of incidence) = 83.0 degrees

Using Snell's law:

1 * sin(83.0 degrees) = 1.340 * sin(theta2_blue).

Rearranging the equation:

sin(theta2_blue) = (1 * sin(83.0 degrees)) / 1.340,

Taking the inverse sine:

theta2_blue = arcsin((1 * sin(83.0 degrees)) / 1.340).

Calculating theta2_blue:

theta2_blue ≈ arcsin(0.828) ≈ 56.62 degrees.

So, the underwater angle of refraction for blue light is approximately 56.62 degrees.

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Answer:

Initial: bring ek, eg and ech all to 2, in the end bring ek, eg up to 3 each

Explanation:

The initial state of the ball, the effect the ball might have on the Earth, and the balls final state. Ek stands for kinetic energy, Eg stands for gravitational potential energy, and Ech stands for chemical change (stored energy in food/fuel), Eint stands for internal energy change.

Kinetic energy is the type of energy present in a body due to the property of its motion and potential energy is the kind of energy present in a body due to the property of its state.

Kinetic energy can be easily transferred from one body to another but potential energy is not transferable. Kinetic energy is relative with respect to nature and potential energy is non-relative with respect to nature.

As the ball is rolling down a ramp, its potential energy decreases and kinetic energy increases.  The ball has the maximum potential energy when it is at the top, and this potential energy is transformed into both translational and rotational kinetic energy as it rolls down.

When the ball is at the topmost height, its gravitational potential energy is maximum and zero kinetic energy. When a ball reaches the bottom of the ramp, it will have zero potential energy and maximum kinetic energy.

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It will take an additional 7.33 minutes for the cake to cool from 200 degrees F to 90 degrees F after the initial 10 minutes of cooling.

To calculate how much longer it will take for the cake to cool to 90 degrees F, we need to first determine the rate at which the cake is cooling. We can do this by calculating the temperature difference between the cake and the room and dividing it by the time it takes for that temperature difference to occur.
In this case, the temperature difference between the cake and the room is 280 degrees F (350-70=280) when the cake is removed from the oven. After 10 minutes, the temperature difference is 130 degrees F (200-70=130). Therefore, the cake is cooling at a rate of 15 degrees F per minute (280-130=150 degrees F in 10 minutes; 150/10=15).
To determine how much longer it will take for the cake to cool to 90 degrees F, we need to calculate the time it takes for the temperature to drop from 200 degrees F to 90 degrees F. This is a temperature difference of 110 degrees F (200-90=110), so it will take approximately 7.33 minutes (110/15=7.33) for the cake to cool from 200 degrees F to 90 degrees F.

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Answer:

FN=-Fg -> Fg=mg -> Fg = 238 kg*9.8 m/s^2 ->

Fg = -2432.4 so FN = 2432.4 -> FF = μs*FN ->

FF = 0.22*2332.4 N -> FF = 513.128 ->

Fapplied > 513.128 N

Explanation:

...

Distance = (30+40+50) = 120 km

It's back where it started, so displacement = zero

The distance traveled by truck is equal to 70 km and its displacement is 50 km.

The distance of an object can be described as the total path traveled by an object. It is a scalar quantity as it has only magnitude, not direction. The distance is always positive, it can never be zero.

The displacement can be described as the shortest distance between two points. The displacement is a vector quantity with both direction and magnitude. The displacement of an object can be positive, negative, or zero and can increase or decrease with time.

Given, a truck moves 30 km along AB in the West as shown in the attached figure below, and then 40 km North along BC.

The distance of the truck will be = AB + BC = 30 + 40 = 70Km

The displacement (AC) can be calculated by using Pythagoras' theorem:

AC² = AB² + BC²

AC² = (30)² + (40)²

AC² = 2500

AC = 50 Km

Therefore, the distance is 70 Km and the displacement of the truck is 50 Km.

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This is an application of Newton's second law to the forces felt in an elevator.

The use of elevators in public places is a sample of rectilinear motion. If you are accelerating uphill you feel heavier, and if you are accelerating downward you feel lighter. In free fall mode, the elevator's acceleration is the same as the acceleration due to gravity. The enormity of the acceleration due to gravity is 9,8 m/s2,

Since your true weight remains the same, the net force appears because the elevator exerts a smaller normal force on you which is complemented by Newton's Third Law by an equal force downwards on the elevator

So we can conclude that an elevator going up shows constant linear motion, as the elevator will move in a linear line with a constant speed.

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Answer:

i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii)  Find the value of k first: F = 400 + k(15^2)                                              k = 28/9    F = 400 +(28/9)(30^2) = 320

Explanation:

Answer:

0.16 rad /s

Explanation:

Given that :

Time, t = 9.46 s

Quarter turn = 1/4 rev

θ = wt

w = angular speed `. ; t = time in second

1 rev = 2 pi

θ = 2pi

1/4 θ = 1/4 * 2pi = pi/2

θ = wt

pi/2 = w * 9.62

3.14 = w * 9.62 * 2

3.14 = 19.24w

w = 3.14 / 19.24

w = 0.1602040

w = 0.16 rad /s

Answer:

easeaseaseas

Explanation:

Answer:

5.93 m/s (2 d.p.)

Explanation:

When a body is projected through the air with initial speed u, at an angle of θ to the horizontal, it will move along a curved path.

Therefore, trigonometry can be used to resolve the body's initial velocity into its vertical and horizontal components:

As the projectile is modeled as moving only under the influence of gravity, the only acceleration the projectile will experience will be acceleration due to gravity.

Constant Acceleration Equations (SUVAT)

\(\boxed{\begin{array}{c}\begin{aligned}v&=u+at\\\\s&=ut+\dfrac{1}{2}at^2\\\\ s&=\left(\dfrac{u+v}{2}\right)t\\\\v^2&=u^2+2as\\\\s&=vt-\dfrac{1}{2}at^2\end{aligned}\end{array}} \quad \boxed{\begin{minipage}{4.6 cm}$s$ = displacement in m\\\\$u$ = initial velocity in ms$^{-1}$\\\\$v$ = final velocity in ms$^{-1}$\\\\$a$ = acceleration in ms$^{-2}$\\\\$t$ = time in s (seconds)\end{minipage}}\)

When using SUVAT, assume the object is modeled as a particle and that acceleration is constant.

If the salmon jumps at an angle of 36.2° then:

The horizontal component of velocity is constant, as there is no acceleration horizontally.

Resolving horizontally, taking → as positive:

\(s=3.02 \quad u=u \cos 36.2^{\circ} \quad v=u \cos 36.2^{\circ} \quad a=0\)

\(\begin{aligned}\textsf{Using} \quad s & =ut+\dfrac{1}{2}at^2\\\\3.02 & = (u \cos 36.2^{\circ})t+\dfrac{1}{2}(0)t^2\\3.02 & = (u \cos 36.2^{\circ})t\\\implies t&=\dfrac{3.02}{u \cos 36.2^{\circ}}\end{aligned}\)

Acceleration due to gravity = 9.81 ms⁻²

Resolving vertically, taking ↑ as positive and using the found expression for t:

\(s=0.258 \quad u=u \sin 36.2^{\circ} \quad a=-9.81 \quad t=\dfrac{3.02}{u \cos 36.2^{\circ}}\)

\(\begin{aligned}\textsf{Using} \quad s & =ut+\dfrac{1}{2}at^2\\\\0.258 & = (u \sin 36.2^{\circ})\left(\dfrac{3.02}{u \cos 36.2^{\circ}}\right)+\dfrac{1}{2}(-9.81)\left(\dfrac{3.02}{u \cos 36.2^{\circ}}\right)^2\\0.258&=3.02 \tan36.2^{\circ}-4.905\left(\dfrac{9.1204}{u^2 \cos^2 36.2^{\circ}}\right)\\0.258-3.02 \tan36.2^{\circ}&=-\dfrac{44.735562}{u^2 \cos^2 36.2^{\circ}}\\u^2&=-\dfrac{44.735562}{(0.258-3.02 \tan36.2^{\circ})(\cos^2 36.2^{\circ})}\\u^2&=35.18849443\\ u&=5.931989079\end{aligned}\)

Therefore, the minimum speed at which the salmon should leave the water is 5.93 m/s (2 d.p.).

The energy needed to heat the water and the copper tank to 55°C is 25,083,080 J.

Q = mCΔT

m = 150 kg (mass of water)

C = 4.18 J/g°C (specific heat capacity of water)

ΔT = 55°C - 15°C = 40°C (change in temperature)

Using the formula, we get:

\(Q_{water}\) = mCΔT

\(Q_{water}\) = (150 kg) x (4.18 J/g°C) x (40°C)

\(Q_{water}\) = 25,080,000 J

m = 20 kg (mass of tank)

C = 0.385 J/g°C (specific heat capacity of copper)

ΔT = 55°C - 15°C = 40°C (change in temperature)

Using the formula, we get:

\(Q_{tank}\) = mCΔT

\(Q_{tank}\) = (20 kg) x (0.385 J/g°C) x (40°C)

\(Q_{tank}\)= 3080 J

Finally, we can add the two energies together to get the total energy needed:

\(Q_{total}\) = \(Q_{water}\) \(+\) \(Q_{tank}\)

\(Q_{total}\) \(= 25,080,000 J + 3080 J\)

\(Q_{total}\) \(= 25,083,080 J\)

Energy is a fundamental concept that refers to the ability of a physical system to do work or cause a change. It is a scalar quantity that is measured in units of joules (J) in the International System of Units (SI). According to the law of conservation of energy, energy cannot be created or destroyed, but it can be transformed from one form to another. This means that the total amount of energy in a closed system remains constant.

Energy is a crucial concept in many areas of physics, including mechanics, thermodynamics, and electromagnetism. Understanding energy is essential for understanding how the physical world works, and it has numerous applications in technology and everyday life, from powering our homes and vehicles to the production of food and the functioning of our bodies.

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Answer:

b one is correct........I wish u give me mark as brainlliest

The percentage of adhesions measured in use that are higher than 0.40 is approximately 22.66%.

For finding the percentage of adhesions that are higher than 0.40, need to calculate the area under the normal distribution curve to the right of 0.40. First, need to standardize the value of 0.40 using the Z-score formula:

Z = (X - μ) / σ

Where X is the value (0.40), μ is the mean (0.37), and σ is the standard deviation (0.04).

Z = (0.40 - 0.37) / 0.04 = 0.03 / 0.04 = 0.75

Next, look up the Z-score of 0.75 in the standard normal distribution table for finding the corresponding cumulative probability. The Z-table tells that the cumulative probability to the left of 0.75 is approximately 0.7734.

Since want the percentage to the right of 0.40, subtract the cumulative probability from 1:

1 - 0.7734 = 0.2266

Therefore, the percentage of adhesions measured in use that are higher than 0.40 is approximately 22.66%.

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The initial total kinetic energy of the system can be calculated by summing the individual kinetic energies of the two masses.

The final speed of the system can be found using the principle of conservation of momentum. The final total kinetic energy is determined by calculating the kinetic energy of the combined mass. The increase in internal energy can be obtained by subtracting the final total kinetic energy from the initial total kinetic energy.

(a) The initial total kinetic energy (K) is the sum of the individual kinetic energies of the two masses. Since both masses have the same mass (7 kg) and the same speed (12 m/s), their individual kinetic energies are equal. Therefore, the initial total kinetic energy is:

K = 2 * (1/2 * m * v^2) = 2 * (1/2 * 7 kg * (12 m/s)^2) = 1008 J.

(b) The final speed (Vf) of the system can be found using the principle of conservation of momentum. The momentum before the collision is zero since one mass is stationary and the other has a velocity of 12 m/s. After the collision, the two masses stick together, so their combined momentum is zero. Therefore, the final speed of the system is zero.

(c) The final total kinetic energy (Kp) is the kinetic energy of the combined mass. Since the final speed is zero, the final total kinetic energy is also zero.

(d) The increase in internal energy is the difference between the initial and final total kinetic energies:

Increase in internal energy = K - Kp = 1008 J - 0 J = 1008 J.

Therefore, the increase in internal energy of the two masses is 1008 J

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The given problem involves calculating the definite integral of a function f(x) over a specific range. The function f(x) is defined differently for different values of x, and the final result of the definite integral \(1^2\)₁ f(x) dx, where x ≤ n, is -cos(n) - (-cos(1)) + 3cos(T) - 3cos(n) + infinity.

To calculate the definite integral 1²₁ f(x) dx, where x ≤ n, we need to evaluate the integral of the given function f(x) over the specified range. The function f(x) has different definitions depending on the value of x. For x ≤ n, the function is sin(x), and for x > n, the function is -3sin(x). Additionally, the function is defined as 2x for values of x greater than a certain threshold T.

To solve this problem, we need to consider the different intervals of the range separately. First, we integrate sin(x) over the interval 1 to n. The integral of sin(x) is -cos(x), so the value of this part of the integral becomes -cos(n) - (-cos(1)).

Next, we need to integrate -3sin(x) over the interval n to T. The integral of -3sin(x) is 3cos(x), so this part of the integral becomes 3cos(T) - 3cos(n).

Lastly, we integrate 2x over the interval T to infinity. The integral of 2x is \(x^2\), so this part of the integral becomes infinity.

Combining these three parts, the final result of the definite integral \(1^2\)₁ f(x) dx, where x ≤ n, is -cos(n) - (-cos(1)) + 3cos(T) - 3cos(n) + infinity.

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Answer:

Place the object on the disk and measure the distance from the center of the disk to the center of mass of the object by using a meterstick. Slowly increase the rate the disk rotates until the object begins to slide off the disk. Record the time in which the object makes one revolution around the center of the disk.

Explanation:

Draw a free body diagram.  There are three forces:

Weight force mg pulling down,

Normal force N pushing up,

Friction force Nμ pushing towards the center.

Sum of forces in the vertical direction:

∑F = ma

N − mg = 0

N = mg

Sum of forces in the centripetal direction:

∑F = ma

Nμ = m v²/r

mgμ = m v²/r

gμ = v²/r

μ = v² / (gr)

It takes T seconds for the object to move 2πr meters.

v = 2πr / T

Substituting:

μ = (2πr / T)² / (gr)

μ = 4π²r / (gT²)

The measurements you need are the distance between the object and the center of the disk (r) and the time it takes for one revolution (T).

Gamma rays have various practical applications, but the most significant among the provided options is (d) treating cancerous tissues. Gamma rays are high-energy electromagnetic radiation with short wavelengths and high penetration capabilities.

In cancer treatment, a process called radiotherapy is employed, where gamma rays are directed towards cancerous cells in a controlled manner.
These high-energy rays destroy cancerous cells by damaging their DNA, thus inhibiting their ability to grow and reproduce. This treatment method can be used alone or in combination with other therapies, such as chemotherapy and surgery. The precision of gamma rays allows them to target specific areas, reducing the damage to healthy tissues surrounding the cancerous cells.
Although gamma rays have other applications, they are not commonly used for the options (a), (b), (c), or (e). Detecting the speed of a traveling car is typically done using radar or lidar technology, while controlling destructive interference involves manipulating sound or light waves. Cooking food is accomplished with lower energy radiation like microwaves, and carrying radio signals is primarily the domain of lower-frequency radio waves.

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Answer:

31. Respiratory System

32. Excretory System

33. Nervous System

34. Reproductive system

35. Skeleton System

Explanation:

Hope it helps you.^_^

Answer:

31. Respiratory System

32. Excretory System

33. Circulatory System

34. Reproductive System

35. Muscular and Skeletal System

Explanation:

In 35. you should write both systems since only one of them may give you half the marks.

Also do put your questions on the health section

Answer:

you change the direction of the magnetic field.

Explanation:

Because the magnetic field created by the electric current in the wire is changing directions around the wire, it will repel both poles of the magnet by bending away from the wire.

When the resistor in the circuit has a larger resistance value, it will lower the total current that flows in the circuit.

In an electric circuit, resistance is the opposition that an electrical circuit exhibits to the flow of electric current. In general, resistance is measured in ohms (Ω).

When large resistance used:

When large resistor added:

As a result, adding a larger resistor to a circuit would lower the total current that flows in the circuit.

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Answer: static electricity

Explanation: The movement of charged particles through a wire or other medium is called current or electricity. There is also static electricity, which results from an imbalance or separation of the positive and negative charges on an object. Static electricity is a form of electrical potential energy