The sun gives off every wavelength of the EM Spectrum Knowing that some of the waves carry high energy that could be harmful to life on Earth Why are we not harmed by the sun's energy ? (sorry no option for science)​

Answer:

True

Explanation:

Modulation waves(schemes) can be analog or digital. An analog modulation scheme has an input wave that varies continuously like a sine wave.

Part A :The position of the particle in vector form is given by\(r⃗ (t)=R[cos(ωt)i^+sin(ωt)j^]\)where R is the radius of the circle and ω is the angular velocity.The velocity of the particle is given by taking the derivative of the position vector with respect to time.

Taking derivative with respect to time on both side we get \(v⃗ (t)=d/dt R[cos(ωt)i^+sin(ωt)j^]= R[-in(ωt)ωi^+cos(ωt)ωj^]=ωR[-sin(ωt)i^+cos(ωt)j^]v⃗ (t)=ωR[-sin(ωt)i^+cos(ωt)j^]\)Thus the velocity of the mass at a time t is given by \(v⃗ (t)=ωR[-sin(ωt)i^+cos(ωt)j^]\).

Part B :

We have to find the velocity at time -t. The velocity of the particle is given by taking the derivative of the position vector with respect to time. Thus the velocity of the mass at a time -t is given by \(v⃗ (-t) = ωR[sin(ωt)i^ - cos(ωt)j^]\)

\(v⃗ (-t) = ωR[sin(ωt)i^ - cos(ωt)j^]\)Part C :

The average acceleration of the particle can be computed using the formulaa = \(Δv/Δt\)The velocity at time t is given by\(v⃗ (t) = ωR[-sin(ωt)i^+cos(ωt)j^]\)

The velocity at time -t is given by \(v⃗ (-t) = ωR[sin(ωt)i^ - cos(ωt)j^]\)

\(v⃗ (-t) = ωR[sin(ωt)i^ - cos(ωt)j^]\)The change in velocity over the interval from -t to t is therefore

\(Δv = v(t) - v(-t) = 2ωR[sin(ωt)i^ + cos(ωt)j^]\)

The time interval over which this change occurs is\(Δt = 2t\)Thus the average acceleration of the particle is given by a = \(Δv/Δt = ω^2R[sin(ωt)i^ + cos(ωt)j^]/t\)

\(a = Δv/Δt = ω^2R[sin(ωt)i^ + cos(ωt)j^]/t\)

The acceleration can be expressed in terms of R, ω, t, and the unit vectors \(i^ and j^\) as \(a = ω^2R[sin(ωt)i^ + cos(ωt)j^]/t\).

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The magnitude of the magnetic field at point P, located on the y-axis, due to a point charge q moving along the positive x-axis with speed v when the charge is at the origin, can be determined using the Biot-Savart law.

The Biot-Savart law describes the magnetic field produced by a current-carrying wire. In this case, we can consider the point charge q as a moving point source of current. The Biot-Savart law states that the magnetic field at a point P due to a current element dl is given by:

\(\[\vec{B} = \frac{\mu_0}{4\pi} \frac{q\vec{v} \times \vec{r}}{r^3}\]\)

where \(\(\vec{B}\)\) is the magnetic field,\(\(\mu_0\)\) is the permeability of free space, q is the charge, \(\(\vec{v}\)\) is the velocity of the charge,  \(\(\vec{r}\)\)  is the position vector from the charge to the point P, and r is the magnitude of  \(\(\vec{r}\)\) . In this scenario, the charge q is at the origin (x = 0) and moves along the positive x-axis. The position vector \(\(\vec{r}\)\) from the charge to point P is given by \(\(\vec{r} = y\hat{j}\)\), where y is the distance of point P from the origin. The velocity of the charge is \(\(\vec{v} = v\hat{i}\)\), where v is the speed of the charge. Plugging these values into the Biot-Savart law, we get:

\(\[\vec{B} = \frac{\mu_0}{4\pi} \frac{qv(y\hat{j}) \times (y\hat{j})}{(y^2)^{3/2}}\]\)

Simplifying the expression, we find that the magnitude of the magnetic field at point P is given by:

\(\[B = \frac{\mu_0qv}{4\pi y^2}\]\)

Therefore, the magnitude of the magnetic field at point P, as the charge moves through the origin, is inversely proportional to the square of the distance y from the origin.

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Answer:

5.5 rad/sec

Explanation:

Answer:

5.47 rad/s

Explanation:

We can solve this problem using the principle of conservation of energy and angular momentum.

First, let's find the initial kinetic energy of the projectile:

K1 = (1/2) * m * v1^2

= (1/2) * 0.2 kg * (50 m/s)^2

= 250 J

where v1 is the initial velocity of the projectile.

Next, let's find the final kinetic energy of the projectile:

K2 = (1/2) * m * v2^2

= (1/2) * 0.2 kg * (-25 m/s)^2

= 67.5 J

where v2 is the final velocity of the projectile after the collision.

The loss of energy in the collision is:

ΔK = K1 - K2

= 187.5 J

This energy is transferred to the blades, causing them to spin. Let's assume that all of this energy is converted to rotational kinetic energy of the turbine.

The final rotational kinetic energy of the turbine is:

K_rot = (1/2) * I * ω^2

where I is the moment of inertia of the turbine and ω is the final rotational velocity of the turbine.

Using the conservation of energy, we can equate the loss of kinetic energy in the collision to the gain in rotational kinetic energy of the turbine:

ΔK = K_rot

187.5 J = (1/2) * 12.5 kg m^2 * ω^2

ω^2 = (2 * 187.5 J) / (12.5 kg m^2)

ω^2 = 30

ω = 5.47 rad/s

Therefore, the rotational velocity of the turbine after the collision is 5.47 rad/s.

The least buoyant force on a rock is when it is submerged near the bottom. The correct answer is option C, near the bottom. Why is the least buoyant force on a rock when it is submerged near the bottom?

Explanation:

The buoyant force is the upward force that acts on an object when it is placed in a fluid, such as water. The amount of buoyant force is dependent on the weight of the fluid displaced by the object.

When an object is submerged in a fluid, the buoyant force acts upwards, opposing the force of gravity acting downwards on the object.

The buoyant force is the greatest when the object is submerged near the surface of the fluid. This is because the weight of fluid displaced is more at the surface than it is at the bottom of the fluid. As a result, the buoyant force is less when the object is submerged near the bottom of the fluid.

Therefore, the least buoyant force on a rock is when it is submerged near the bottom.

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Answer:

im confused what do you need us to answer

Explanation:

From the calculation, the speed of sound at 10 K is 63.5 m/s.

We know that the speed of sound is directly proportional to the temperature of the body thus we can write;

V1/V2 = √T1/T2

Then;

T1 = 0 degrees or 273 K

T2 = 10 K

V1 = 330 m/s

V2 = ?

330/T2 = √273/10

330/T2 = 5.2

330 = 5.2T2

V2 = 330/5.2

V2 = 63.5 m/s

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Yes, the faster person will lap the slower person by the time the slower person completes one lap.

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The average acceleration of the car in the first scenario is zero since the velocity remains constant and the average acceleration of the car in the second scenario is -15 m/s² as the car changes direction and its velocity decreases respectively.

The average acceleration of the NASCAR race car in both scenarios can be calculated using the formula:
average acceleration = (final velocity - initial velocity) / time

(a) In the first scenario, the car is moving to the right with a constant velocity of +90 m/s. Since the velocity is constant, there is no change in velocity over time. Therefore, the average acceleration of the car is zero.

(b) In the second scenario, the car is halfway around the track and traveling in the opposite direction with the same speed of 90 m/s. Here, the initial velocity is +90 m/s and the final velocity is -90 m/s. The time taken for the car to travel halfway around the track is 12 seconds.

Using the formula for average acceleration, we can calculate:

average acceleration = (-90 m/s - 90 m/s) / 12 s = -180 m/s / 12 s = -15 m/s²

Thus, the average acceleration of the car in the first scenario is zero since the velocity remains constant and the average acceleration of the car in the second scenario is -15 m/s² as the car changes direction and its velocity decreases respectively.

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King tide happens during a king tide when the moon is between the earth and the sun. When the Moon's orbit around Earth is at its first and last quarter phases, neap tides happen.

Turns it so that it is parallel to the Sun. Extremely high or extremely low tides can occur when Earth, the Moon's orbit, and the Sun line up because of the combined gravitational effect. Moderate tides occur when the Sun and the Moon are at a straight angle. Its gravitational pull causes the Earth's tides and somewhat lengthens the day as it orbits the planet at a distance of 384,400 km (238,900 mi), or about 30 times the diameter of the planet. A sidereal period of 27.3 days characterizes the Moon's orbit of the Earth.

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Answer:

through the vibration of particles

Explanation:

Energy is transferred in waves through the vibration of particles, but the particles themselves move in a perpendicular fashion to the horizontal movement of the wave.

You can say anything you want to about them without fear of contradiction. There's no information here to prove you wrong.

Answer:

B

Explanation:

Water is essential to most bodily functions.

The rate at which an angle's displacement changes is known as its angular velocity, and the rate at which its angular velocity changes is known as its angular acceleration.

The displacement will include both magnitude and direction information. The direction will be shown by a circular arrow extending from the starting point to the ending location. The direction might either be clockwise or counterclockwise.

The displacement is only the difference between the locations of the two marks and is unrelated to the route used to get there. The total length of the path between the two markings, however, is the distance traveled.

Therefore, In non-uniform circular motion, the rate of change of angular velocity (i.e., angular acceleration) isn't equal to the rate of change of velocity over time.

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When both resistors are linked in series, the voltage across R1 is 0.8V and the voltage across R2 is 0.2V.

When series resistors are linked, the overall resistance equals the sum of the individual resistances. The voltage across each resistor may be calculated using Ohm's equation (V = IR).

Given:

R1 = 480 ohms

R2 = 120 ohms

Assume V is the entire voltage across the series circuit.

The current flowing through both resistors is the same since they are linked in series. Let's call this current I.

The voltage across each resistor may be computed using Ohm's law as follows:

V1 = IR1 = voltage across R1

V2 = IR2 = Voltage across R2

We may write: since the current passing through both resistors is the same:

V = V1 + V2

Let us now swap the values:

V = IR1 + IR2

We may rewrite the equation using Ohm's law (V = IR) as:

V = I(R1 + R2)

We may rewrite the equation to find the current (I):

I = V / (R1 + R2)

We can now plug this number back into the V1 and V2 equations:

V1 = I * R1 V2 = I * R2

By changing the value of I, we get:

V1 = (V / (R1 + R2)) * R1 V2 = (V / (R1 + R2)) * R2

Let's compute the voltage across each resistor separately:

V1 = (V / (R1 + R2)) * R1 = (V / (480 + 120)) * 480 = (V / 600) * 480 = 0.8V

V2 = (V/(R1 + R2)) * R2 = (V/(480 + 120)) * 120 = (V/600) * 120 = 0.2V

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Answer:

The angle of the Sun's rays:

At about June 21 the sun is directly overhead at about 23 deg north of the equator

On about Dec 21 the sun is directly overhead at about 23 deg south of the equator

It is this tilt 23 deg to the ecliptic (path of earth about sun) that causes the major temperature changes on earth

Explanation:

there are 8 atoms of oxygen

Answer: Option B

Explanation:

A experiment has many factors in it. It has a dependent variable, independent variable, control variable et cetera.

The independent variable as its name signifies is not dependent on any factors and is directly controlled by the experimenter.

The dependent variable is dependent on the change in the independent variable.

The dependent variable is actually the result of the experiment and is not manipulated.

Answer:

geocentric

i hope this helps!!!!

Explanation:

The resulting equation of motion for the system is given by m × x''(t) + k × x(t) = f(t), which is 2 × x''(t) + 18 * x(t) = 2 * sin(2t).

What is  equation of motion?

The equations of motion are a set of mathematical relationships that describe the motion of objects under the influence of forces. There are different sets of equations of motion, depending on the specific scenario and the type of motion being considered (linear motion, projectile motion, circular motion, etc.). The equations of motion for linear motion, also known as the equations of uniformly accelerated motion.

To find the equation of motion for the system, we start with Newton's second law of motion, which states that the sum of forces acting on an object is equal to the mass of the object multiplied by its acceleration. In this case, the object is the 2-kg mass attached to the spring.

The force exerted by the spring is proportional to the displacement of the mass from its equilibrium position, and it can be expressed as F_spring = -k× x(t), where k is the spring constant and x(t) is the displacement of the mass at time t.

In addition to the force exerted by the spring, there is an external force f(t) = 2 ×sin(2t) acting on the mass.

Applying Newton's second law, we have the equation of motion: m ×x''(t) + k ×x(t) = f(t).

Substituting the given values, m = 2 kg and k = 18 N/m, we obtain 2 ×x''(t) + 18 × x(t) = 2 ×sin(2t).

Therefore, the resulting equation of motion for the system is 2 × x''(t) + 18 × x(t) = 2 × sin(2t).

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Katy slows from 6.7 m/s to 2.3 m/s in 2.2 seconds. The acceleration will be 2 \(m/s^{2}\)

initial speed = 6.7 m/s

final speed = 2.3 m/s

time = 2.2 seconds

acceleration = change in speed / time interval

                      = 2.3 - 6.7 / 2.2

                      = -2 \(m/s^{2}\)

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Vector A= 180m/s towards x-axis and vector B= 120m/s towards y-axis. 33.69° is the resultant vector using suitable scale, coordinates and using head-to-tail method.

To find the resultant vector of vector A (180m/s towards x-axis) and vector B (120m/s towards y-axis) using the head-to-tail method, follow these steps:

Let's say we use a scale of 1cm=30m/s. We draw Vector A of length 6cm towards the positive x-axis, and Vector B of length 4cm towards the positive y-axis, as shown in the figure below.
1. Draw vector A on the x-axis with a length representing 180 units.
2. Draw vector B on the y-axis with a length representing 120 units, starting from the head (end) of vector A.
3. The resultant vector, denoted as vector R, is the vector connecting the tail of vector A to the head of vector B.
To calculate the magnitude and direction of vector R, we can use the Pythagorean theorem and trigonometry:
Magnitude: R = √(A² + B²) = √(180² + 120²) = √(32,400 + 14,400) = √(46,800) ≈ 216.33 m/s
Direction: θ = tan⁻¹(B/A) = tan⁻¹(120/180) = tan⁻¹(2/3) ≈ 33.69° above the x-axis
So, the resultant vector R has a magnitude of approximately 216.33 m/s and is directed at an angle of 33.69° above the x-axis.

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Answer:

Bohr Model

Explanation:

Answer:

c. Y

Explanation:

Newton's third law of motion states that action and reaction are equal and opposite. Hence for every action, there is an equal and opposite reaction.

Considering the system of forces shown in the image, W and Y are  opposite forces. When the driver slams on the brakes, he will be pushed forward towards the windscreen. The force Y exerted by the seat belt keeps him on the drivers seat by moving him backwards towards the seat.

A tennis player hits a 56.0 g ball vertically with her racket to warm up for a match.

In this scenario, the tennis player is using the vertical hitting of the ball as a warm-up exercise before the match.

This helps to increase blood flow to the muscles, improve coordination, and prepare the body for the more intense activity of a tennis match.

The mass of the ball, 56.0 g, is given as part of the problem, but there is no information provided about the force or velocity of the hit.

Summary: A tennis player warms up by hitting a 56.0 g ball vertically with her racket, which aids in preparing her body for the match. However, information regarding the force or velocity of the hit is not provided.

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The expression for the direction of the car's average acceleration in terms of x and y coordinates is given by a = \((a_x^2 + a_y^2)^{1/2}\).

The direction of the car's average acceleration can be calculated in terms of x and y coordinates. To calculate the magnitude of the car's acceleration, the Pythagorean theorem is used, which states that \(a^2 = a_x^2 + a_y^2\). In this case, \(a_x\) represents the acceleration in the x direction, while \(a_y\) represents the acceleration in the y direction. Therefore, the magnitude of the car's acceleration can be expressed as follows: a = \((a_x^2 + a_y^2)^{1/2}\)

The direction of the car's average acceleration can be calculated in terms of x and y coordinates. The acceleration in the x and y directions can be calculated by taking the derivatives of the velocity components in those directions with respect to time. Once these components are known, they can be used to calculate the magnitude and direction of the car's acceleration. To calculate the magnitude of the car's acceleration, the Pythagorean theorem is used, which states that \(a^2 = a_x^2 + a_y^2\).

In this case, a_x represents the acceleration in the x direction, while \(a_y\) represents the acceleration in the y direction. Therefore, the magnitude of the car's acceleration can be expressed as follows:

a = \((a_x^2 + a_y^2)^{1/2}\)

The direction of the car's average acceleration is given by the angle θ, where \(tan(\theta) = a_y / a_x\). This angle can be calculated using the inverse tangent function, or arctan. Once the angle is known, it can be used to determine the direction of the acceleration in relation to the x and y axes. If the angle is positive, the acceleration is in the first or third quadrant of the coordinate plane, while if it is negative, the acceleration is in the second or fourth quadrant.

The direction of the car's average acceleration can be calculated in terms of x and y coordinates by finding the magnitude of the acceleration using the Pythagorean theorem and then calculating the angle using the inverse tangent function. The angle can be used to determine the direction of the acceleration in relation to the x and y axes.

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Static equilibrium means that all forces are equal, so to make this easiest you want to break F1 into it's horizontal and vertical components. As there are no other forces acting in the horizontal, we know the horizontal component of F1 is 40N.

Dynamic equilibrium is a state in which bodies are moving at a constant speed as opposed to static equilibrium, which is a state in which bodies are at rest (rectilinear motion). The total amount of forces exerted on them in both situations is zero.

When two forces are acting on an object that is in static equilibrium, it indicates that their sum is zero, which makes static equilibrium a useful analytical tool. You may create an equation to figure out the direction and strength of the unknown force if you know the direction and strength of one of the forces.

Thus, Static equilibrium means that all forces are equal, so to make this easiest you want to break F1 into it's horizontal and vertical components.

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Answer:

magenicts   sshbsunuwi

Explanation:

Option B (Sound) is the appropriate choice.

There are surface and groundwater vibrations that cause individual eardrums to vibrate, causing the sensory organ to be felt, which is considered as a Sound.

The other given alternatives such as:

Gravity - A force that seeks to bring two items together, is gravity. Gravitational influence is a property of all objects with weight.

Magnetism - Magnetism seems to be the force that magnetically exerts whenever they approach as well as repelled each other.

Matter - Material or materials from which a thing is usually made, is a matter.

These three choices are not related to the given question. Thus the above is the right answer.

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