An athlete competing in long jump leaves the ground with a speed of 9.14 m/s at an angle of 35.00 above the horizontal. What is the length of the athlete's jump?

Answer:

The correct solution is option A "10 meters".

Explanation:

The given values are:

Wave X,

Frequency,

\(F_x=200 \ H_z\)

Wavelength

\(\lambda_x=35 \ m\)

Wave Y,

Frequency,

\(F_y=700 \ Hz\)

Let its wavelength = \(\lambda_y\)

As we know,

⇒  \(v=f \lambda\)

For both waves, medium is same then

⇒  \(v_x=v_y\)

⇒  \(f_x \lambda_x=f_y \lambda_y\)

then,

⇒  \(\lambda_y=\frac{f_x \lambda_x}{f_y}\)

On substituting the estimated values in the above equation, we get

⇒      \(=\frac{200\times 35}{700}\)

⇒      \(=\frac{7000}{700}\)

⇒      \(=10 \ m\)

Wycleff is on block 1, Lilly is on block 4, Emilia is on block 12, and Quincy is on block 17 is the correct statement about each person standing at block.

As a source and observer move closer or farther apart, the Doppler effect, which is a phenomenon in physics, causes the frequency of sound, light, or other waves to rise or fall. When a source emits waves, those waves are compressed as they approach the observer.

Wycleff could hear a low-pitched sound the entire time, indicating that the police car was relocating away from him. He was thus in block 1.

A Doppler effect (change in pitch) was the first thing Lilly noticed. She was at block 4, so the car must have passed her first.

After Lilly, Emilia noticed a Doppler effect. She was at block 12 when the car passed Lilly before passing her.

The entire time, Quincy heard a high-pitched sound, which indicated that the police car was approaching. He was thus in block 17.

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In a nuclear reaction, to calculate the amount of energy it will produce, you must know the difference between the total nuclear mass before and after the reaction.

option A is the correct answer.

Mass defect is the difference between the predicted mass and the actual mass of an atom's nucleus.

In this scenario the actual atomic mass is less than the predicted mass which is calculated by adding the masses of nucleons.

The mass defect represents the energy that was released when the nucleus of an atom is  formed.

The amount of energy released in a nuclear reaction is calculated as;

E = Δmc²

where;

The above equation is known as Einstein binding energy equation.

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The box accelerates to the right due to the applied force of 35 N in the +x direction.

Newton's second law states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. In this case, the net force acting on the box is 35 N in the +x direction, and its mass is 15 kg. Therefore, we can calculate the acceleration using the formula:

acceleration = net force / mass

acceleration = 35 N / 15 kg = 2.33 m/s² (rounded to two decimal places)

Since the box is not accelerating up or down, we can conclude that the force applied is only causing the box to accelerate in the horizontal direction.

Other forces such as gravity and friction are not considered in this scenario. Thus, the 15 kg box will experience an acceleration of approximately 2.33 m/s² in the +x direction due to the applied force of 35 N.

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Answer:

281.25 J

Explanation:

We are told that the two objects with masses m and 3m.

Also that energy stored in the spring is 375 joules.

Now, initially the centre of mass of the system took place at rest, it means v1 = v and v2 = v/3

Thus, from principle of conservation of energy, we have;

½mv² + ½(3m)(v/3)² = 375J

(m + 3m/9)½v² = 375

(4/3)m × ½v² = 375

Multiply both sides by ¾ to get;

½mv² = 375 × ¾

½mv² = 281.25 J

Therefore, energy of lighter body is 281.25 J

The intensity of the circuit is 2 amps (option c).  (B) V =12 volts, R= 6 ohms.

To determine the intensity of the circuit, we can use Ohm's law, which states that the current (I) flowing through a circuit is equal to the voltage (V) divided by the resistance (R).

Given:

Voltage (E) = 12 volts

Resistance (R) = 6 ohms

Applying Ohm's law, we can calculate the intensity (I) using the formula I = V/R:

I = 12 volts / 6 ohms

I = 2 amps

In electrical circuits, intensity refers to the current flowing through the circuit. In this case, with a voltage of 12 volts and a resistance of 6 ohms, the circuit has an intensity of 2 amps, meaning that 2 amperes of current flow through the circuit. (option c).

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Using the formula for the Doppler effect:

f' = (v + vr) / (v + vs) * f

Given:

Source frequency (horn): f = 625 Hz

Speed of sound: v = 343 m/s (approximate value at room temperature)

The velocity of the receiver, vr, is zero because the person waiting at the crosswalk is stationary.

The velocity of the source, vs, is the speed of the car, which is given as 9.0 m/s.

Thus:

f' = (v + vr) / (v + vs) * f

= (343 m/s + 0) / (343 m/s + 9.0 m/s) * 625 Hz

= (343 m/s) / (352 m/s) * 625 Hz

≈ 609 Hz

Therefore, the person waiting at the crosswalk hears a frequency of approximately 609 Hz.

(2)Using the same Doppler effect formula:

f' = (v - vr) / (v - vs) * f

In this case, the velocity of the receiver, vr, is still zero because the person remains stationary.

The velocity of the source, vs, is now negative, indicating that the car is moving away from the person.

Thus:

f' = (v - vr) / (v - vs) * f

= (343 m/s + 0) / (343 m/s - (-9.0 m/s)) * 625 Hz

= (343 m/s) / (352 m/s) * 625 Hz

≈ 609 Hz

In other words, as the car moves away from the person, they would still hear a frequency of approximately 609 Hz.

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Answer:

8 is c and 9 is b it is shown though the practice as god lol

Question 8

The net force acting on the cart is:

F = 150 N - 90 N

F = 60 N

Question 9

By the Newtons second law:

F = ma

Solving for a:

a = F/m

a = 60 N / 30 kg

a = 2 m/s²

Answer:

vpg = 0.064 N

Explanation:

Upthrust = Volume of fluid displaced

upthrust liquid on the cube g=10ms−2

vpg =0.2 x 0.2 x 0.2 x0.8 x 10= 0.064N

vpg = 0.064 N

hope it helps.

The final velocity of a truck is 74.0 ft/s, if it accelerates at a range of 3.00 ft/\(s^2\) from an initial velocity of 5.00 ft/s, then it will take the truck 23.67 seconds to attain its final velocity of 74.0 ft/s.

v = u + at

Here, v =the final velocity, u =the initial velocity, a =the acceleration, and t =the time taken.

Substituting the given values, one can get,

74.0 ft/s = 5.00 ft/s + 3.00 ft/\(s^2\) × t

Solving for t, one gets,

t = (74.0 ft/s - 5.00 ft/s) / (3.00 ft/\(s^2\)) = 23.67 s (that is  23.67 seconds is needed to attain final velocity of 74.0 ft/s)

Hence, a truck needs 23.67 seconds time to attain its final velocity of 74.0 ft/s and this is the final velocity.

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3.0cm

For lenses in an achromatic combination, the following condition holds, assuming the two lenses are of the same materials;

d = \(\frac{f_1 + f_2}{2}\)     ---------(i)

Where;

d= distance between lenses

f₁ = focal length of the first lens

f₂ = focal length of the second lens

From the question;

f₁ = 4.5cm

f₂ = 1.5cm

Substitute these values into equation (i) as follows;

d = \(\frac{4.5+1.5}{2}\)

d = \(\frac{6.0}{2}\)

d = 3.0cm

Therefore, the distance between the two lenses is 3.0cm

Answer:

What Is Moral Subjectivism? Moral subjectivism is based on an individual person's perspective of what is right or wrong. An individual can decide for themselves that they approve or disapprove of a certain behavior, and that is what determines if the behavior is right or wrong.

The definition of horsepower is . A. the amount of force used to cover the length of an English associated activities track B. the practical benefit of utilizing a standard horse

Who developed the horsepower?

James Watt, an engineer, is credited with creating the term horsepower. According to legend, Watt wanted to find a method to describe the power that one of those animals could produce while he was dealing with ponies in a coal mine. An engine is connected to a dynamometer in order to determine its horsepower.

What is the power of a horse?

The most prevalent unit of power is horsepower , which measures how quickly work is completed. According to the British Imperial Units, a horsepower is equivalent to 33,000 walking of work per minute, or the force required to elevate a mass of 3 million pounds one foot in a minute.

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The weight of the Mars Rover Curiosity on Earth and on Mars is 8820 N and 3330 N respectively.

The weight of an object is given by the product of its mass and the gravitational field strength at its location.

On Earth:

On Mars:

Therefore, the weight of the Mars Rover Curiosity on Earth and on Mars are 8820 N and 3330 N respectively.

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The magnetic field that forms when a wire carries an electric current is a circular field that is strongest at the ends of the wire and weakest in the middle.

A current-carrying wire's magnetic field looks like a series of concentric circles that extend outward from the wire in both directions.

The magnitude of the magnetic field is greatest at the center of the wire and decreases as you move away from it.

The direction of the magnetic field is determined by the direction of the current flow: if the current is flowing clockwise around the wire, then the magnetic field will be pointing outward from the wire.

The magnetic field also has a north and south pole, so the direction of the field also depends on which direction around the wire the current is flowing.

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Answer:

Gravity

Explanation:

Gravity pulls things down to earth and it is a force

An electromagnet consists of a conductive wire wrapped around a magnetic core, creating a magnetic field when an electrical current is passed through it.

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Answer:

Kindly check explanation

Explanation:

Change in momentum:

m(v - u)

M = mass = 1500kg

v = final velocity = 0 m/s

u = initial velocity = 8m/s

Momentum = 1500(8 - 0)

Momentum = 1500 * 8

Momentum = 12000 kgm/s

B.) impulse that acts on the car

Impulse = Force * time

Impulse = change in momentum with time

Impulse = m(v - u)

Hence, impulse = 12000Ns

C.) Average force action on the car during collision

Impulse = Force * time

12000 = force * 0.6

12000/ 0.6 = force

Force = 20000 N

D.) Workdone by haystack in stopping the car :

Workdone = Force * Distance

Distance = speed * time

Distance = 8 * 0.6

Distance = 4.8m

Hence,

Workdone = 20,000 * 4.8 = 96000 J

X, Y, and Z components of the vector are 398, 384 and 279 resp.

Vector is a physical quantity which has both magnitude and direction. Vector A can be written as A = a₁i + a₂j + a₃k where a₁, a₂, a₃ are components along X, Y, Z axis resp. and i,j,k, are the unit vectors along X,Y,Z axis resp.

In this figure

vector F is at angle 36° from y axis, hence

x = Fcos33 = 475cos33 = 398 N

y = Fcos36 = 475cos36 = 384 N

z = Fsin36 =  475sin36 = 279 N

The vector can be written as

F = 398i + 384j + 279k

Hence x, y and z components of this force is 398, 384 and 279 resp.

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The velocity, if the satellite moves to an orbital radius of 4r is V/√4

We know that,

V = √ ( G M / r )

where,

V = Orbital velocity

G = Gravitational constant

M = Mass of the satellite

r = Radius of the orbit

Given that,

r' = 4r

V' = √ ( G M / r' )

V' = √ ( G M / 4r )

V' = ( 1 / √ 4 ) ( √ ( G M / r ) )

v' = v / √ 4

Orbital Velocity is the velocity at which one object revolves around another object in a orbit in uniform circular motion

Therefore, the velocity of the satellite that moved to an orbital radius of 4r is V/√4

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Answer:

Whats the question here?

Answer:

b. throw it against a net i think

Answer:

concave shape of the waverock

Explanation:

The wave rock is formed by the weathering of the surrounding area. This helps in proving the deposition part, as the wave rock was below the ground, occurred due to deposition of rock years over the years. It is made from very tough material from its surroundings. The weathering reduces the surrounding terrain, while the bedrock remains to witness for the history.  Also, volcanic eruptions have been changing earth for a long time. (first of all, the theory that a volcanic eruption helped in making dinos go extinct.) Real world examples include: Ash and sulfur went pretty high into Earth's atmosphere because of the Tambora eruption which in turn dimmed incoming sunlight, and lowered global temperatures by about 3°F. The Mount Pinatubo eruption in the Philippines in 1991 cooled the planet by about 1°F.

Since the car is accelerating at a constant rate, the distance it travels during each second of its motion will be directly proportional to the time it has been accelerating.

In the first second, the car moved a distance of 2 meters, and in the second second, it will move twice the distance of the first second, so the car will move additional distance of 2*2 = 4 meters during the second second of its motion.

The distance traveled during the second second of its motion is 1/2 * 2 = 1 meters.

A car that accelerates at a constant rate will move a distance equal to the initial velocity multiplied by time plus 1/2 the acceleration multiplied by the square of time. Since the car starts from rest, the initial velocity is zero.

Therefore, the distance traveled during the second second is 1/2 * acceleration \(* (time)^2 = 1/2 * a * t^2 = 1/2 * a * 1^2 = 1/2 * a\) Since the car moved 2.0 meters in the first second, it means the acceleration is\(2m/s^2\), and the distance traveled during the second second is 1/2 * 2 = 1 meters.

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Answer:

If two bumper cars collide with a certain force, then they will move away from each other in opposite directions with the same force. This demonstrates Newton's third law, which states that for every action, there is an equal and opposite reaction.

Explanation:

The resistance of the copper wire at 80°C is r = 5.952 ohms

Given copper cable length is 1.2 km

The area of cross section given is 5 mm^2

Thus the equation for resistivity is:

p (t) = p (0) × ( 1 + a × ( change in temperature )

p(t) = 0.02 × 10^-6 × ( 1 + 0.004 × 60 )

p (t) = 2.48 × \(10^-^8\) ohm m

r = ( p × l ) ÷ a

r = (  2.48 × \(10^-^8\) × 1200 ) ÷ 5 × \(10^-^6\)

r = 5.952 ohms

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Answer:

no entiendo tu pregunta

Sarah uses an inclined plant to load a chest into her truck. If she does 84 Joules of work, and the inclined plane is 3 meters long, she expend the amount of force is (F)= 252N.

Force is a physical phenomena. When some mass is affected by the external phenomena and moved a distance that means the phenomena is called the force. It can be measured in Newton, Dyne.

To calculate the amount of force we are using the formula here,

F= wd

Here we are given,

w= The work done by Sarah. = 84J

d= The distance of inclined plane.= 3m.

We have to calculate the amount force.= F N

Now we are going to put the values in above equation,

F= wd

Or, F= 84*3

Or, F=252N

Now we can say that, she expend the amount of force is (F)= 252N.

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The speed of the car in terms of the average velocity is \(\frac{v(a+ b) }{\sqrt{a^2 + b^2} }\)

The given parameters;

The average velocity of the car is defined as the rate of change of displacement.

\(average \ velocity = \frac{displacement}{time}\)

The displacement of the car along the rectangle is obtained by applying Pythagoras theorem to calculate the diagonal of the rectangle ;

c² = a² + b²

\(c = \sqrt{a^2 + b^2}\)

\(v= \frac{\sqrt{a^2 + b^2} }{t} \\\\t = \frac{\sqrt{a^2 + b^2} }{v}\)

The speed of the car is defined as the rate of change of distance.

\(speed = \frac{distance}{time}\)

The distance around the 2 sides of the rectangle is calculated as;

Distance =  a + b

\(speed = \frac{a+b}{t}\)

\(speed = \frac{v(a+ b)}{\sqrt{a^2 + b^2} }\)

Thus, the speed of the car is \(\frac{v(a+ b) }{\sqrt{a^2 + b^2} }\)

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