at what speed does a clock move if it is measured to run at a rate three-fourths the rate of a clock at rest with respect to an observer?

Answer:

true

Explanation:

according to the Newton's third law

Answer:

it increased by 29 sorry hope this helps

The energy of the pendulum has decreased by a factor of approximately 552.25 in 120 second

The energy of a pendulum is directly proportional to the square of its amplitude. Therefore, if the amplitude of oscillation decreases by a factor of 23.5, the energy will decrease by the square of that factor.

Let's calculate the factor by which the energy has decreased:

Decrease in energy factor = (Decrease in amplitude factor)^2

                         = (23.5)^2

                         ≈ 552.25

Therefore, the energy of the pendulum has decreased by a factor of approximately 552.25 in 120 seconds.

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Copernican heliocentrism was a novel concept that fundamentally altered the geocentric view of the universe.

The father of modern astronomy is Nicolaus Copernicus, a Polish astronomer and mathematician. The heliocentric hypothesis of the solar system, which he initially put forth, states that Earth and other planets rotate around the sun.

Nicolaus Copernicus created the Copernican heliocentrism astronomical theory, which was first presented in print in 1543. This theory put the Sun in the center of the cosmos, stationary, and had Earth and the other planets orbit it at uniform speeds in circular orbits modified by epicycles.

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Extra care should be taken while installing the Liquidtight flexible nonmetallic conduit in such weather conditions. Option(C) is correct.

It is a limit for Liquidtight flexible nonmetallic conduit that it cannot be used in direct sunlight unless marked for this application. Liquidtight flexible nonmetallic conduit can only be used outdoors if it is explicitly marked for outdoor use and is exposed to sunlight without causing damage.

Any exposure to direct sunlight may cause the conduit to degrade, which may result in safety concerns. It can become brittle in extremely cold temperatures: It is a limit of Liquidtight flexible nonmetallic conduit that it can become brittle in extremely cold temperatures. It is a limitation of Liquidtight flexible nonmetallic conduit that, in extremely cold weather, it may become brittle and lose its capacity to flex.

When the temperature drops below a certain level, the material begins to harden, making it vulnerable to cracking or shattering. Therefore, extra care should be taken while installing the Liquidtight flexible nonmetallic conduit in such weather conditions.

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Hank's distance to work is 17.5 kilometers long.He drove at an average speed of 70 km/h on Monday and arrived 11 minutes late.He drove at an average speed of 75 km/h on Tuesday and arrived 11 minutes early.

To find the distance of Hank's route, we can use the concept of average speed and time. Since the time taken to travel on both days is the same (11 minutes), the difference in arrival time can be attributed to the difference in speed. The speed difference is 5 km/h (75 km/h - 70 km/h). Considering that the time difference is 22 minutes (11 minutes late on Monday and 11 minutes early on Tuesday), we can use the formula: Speed = Distance / Time. Solving for the distance, we get 17.5 kilometers (5 km/h * 22 minutes / 60 minutes).

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Answer:

A string vibrates with a particular fundamental frequency. It is possible, however, to produce pitches with different frequencies from the same string. ... When the length of a string is changed, it will vibrate with a different frequency. Shorter strings have higher frequency and therefore higher pitch.

True, As the sound propagates from one place to the other in air ,the air itself is not required to move from one place to the other.

How does sound move from one location to another?

Parts of the medium that a sound is traveling through alternately compress and expand as it does so. According to science, sound is a vibration that moves through a transmission medium like a gas, liquid, or solid as an acoustic wave.

Therefore, only the energy of the moving particles is transferred during the creation of sound, not the actual particles themselves. Therefore, it is true that the air does not necessarily need to shift from one location to another in order for the sound wave to travel from one to the other.

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Answer:

58.5

Explanation: no clue on how to do it but i just got that answer on my accelus✨

To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration. The direction of the boat is northward and its magnitude is 1.633 m/s².

An object is said to be accelerated if there is a change in its velocity. The rate of change of velocity with respect to time is known as the velocity. It is a vector quantity and it has both magnitude and direction. It is the first derivative of velocity with respect to time.

Fx = 2200 [N]

Fa = 1350 [N]

F = √(Fₓ)² + (Fₐ)²

F = √(2200)² + (1350)²

F = 2581.18 N

Now using Newton's second law.

F = m×a

a = F / m

a = 2581.18 / 1580

a = 1.633 m/s²

Thus acceleration is 1.633 m/s² and it is northward direction.

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Answer:

The correct option is;

D. The kinetic energy decreases by 3·m₀·v₀²

Explanation:

The given parameters are;

The mass of object X = m₀

The initial velocity of object X = v₀

The mass of object Y = 2·m₀

The initial velocity of object Y = -2·v₀

By conservation of linear momentum, we have;

The total initial momentum = The total final momentum

Therefore, we have;

The total initial momentum = m₀·v₀ - 2·m₀·2·v₀ = The total final momentum

∴ The total final momentum = -3·m₀·v₀

The total mass of the two object after sticking together = 2·m₀ + m₀ = 3·m₀

Therefore, the velocity of the two objects after collision = (The total final momentum)/(Total mass) = -3·m₀·v₀/(3·m₀) = -v₀

The kinetic energy = 1/2 × Mass × (Velocity)²

Therefore, the kinetic energy after collision = 1/2 × (3·m₀) × v₀² = 3·m₀·v₀²/2

The kinetic energy before collision = 1/2 × m₀ × v₀² + 1/2 × (2·m₀) × (2·v₀)² = (1/2 + 4) × (m₀·v₀²)

∴ The kinetic energy before collision =  9·(m₀·v₀²)/2

The change in kinetic energy = The kinetic energy after collision - The kinetic energy before collision = 3·m₀·v₀²/2 - 9·(m₀·v₀²)/2 = -3·m₀·v₀²

Therefore, the kinetic energy decreases by 3·m₀·v₀².

Answer:

According to the 2010 U.S. Census, there are approximately 8 million people living in Virginia. This is 2.8 million less than 4 times the population of Nevada.

What is the population of Nevada?

The first step is to  on both sides.

The second step is to  on both sides.

The population of Nevada is  million.

Explanation:

A puck moves at 2.35 m/s in a -22° angle.It is pushed for 0.215 seconds by a hockey stick, changing its velocity to 6.42 m/s in a 50.0° direction. The negative sign indicates that the puck has fallen below its initial height.

How to solve the given problem with the help of trigonometry?

To solve the problem, we need to use the equations of motion and trigonometry.

First, let's find the initial velocity components:

\(\mathrm V_{i,x} = v_i cos(\theta_i) = 2.35 cos(-22^\circ) \approx 2.216\text{ m/s}\)

\(\mathrm V_{i,y} = v_i sin(\theta_i) = 2.35 sin(-22^\circ) \approx -0.891\text{ m/s}\)

where \(v_i\) is the initial velocity and \(\theta_i\) is the initial angle in degrees.

Next, we need to find the final velocity components:

\(\mathrm V_{f,x} = v_f cos(\theta_f) = 6.42 cos(50^\circ) \approx 4.121\text{ m/s}\)

\(\mathrm V_{f,y} = v_f sin(\theta_f) = 6.42 sin(50^\circ) \approx 4.936\text{ m/s}\)

where \(v_f\) is the final velocity and \(\theta_f\) is the final angle in degrees.

The change in velocity components are:

\(\Mathrm\Delta V_x = V_{f,x} - V_{i,x} \approx 1.905\text{ m/s}\)

\($\Delta V_y = V_{f,y} - V_{i,y} \approx 5.827\text{ m/s}\)

The time of the push is t = 0.215 s.

Using the equation of motion, we can find the change in position in the y-direction:

\($\Delta y = V_{i,y} t + \frac{1}{2} a_y t^2\)

where a_y is the acceleration in the y-direction.

Since the puck is in flight, the only force acting on it is gravity, which causes an acceleration of \(-9.8 m/s^2\) in the y-direction.

Plugging in the values, we get:

\(\Delta y = (-0.891\text{ m/s})(0.215\text{ s}) + \frac{1}{2} (-9.8\text{ m/s}^2)(0.215\text{ s})^2 \approx -0.139\text{ m}\)

Note that the negative sign indicates that the puck has fallen below its initial height.

Therefore, the change in position in the y-direction is approximately 0.139 m.

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Answer:

0.434

Explanation:

Answer:

Explanation:

We shall take the help of vector form of displacement . Taking east as i and north as j

4.0m N = 4 j

7.5 m E = 7.5 i

6.8 m S = - 6.8 j

3.7 m E, = 3.7 i

3.6 m S = - 3.6 j

5.3 m W = - 5.3 i

3.7 m N, = 3.7 j

5.6 m W = - 5.6 i

4.4 m S = - 4.4 j

4.9 m W = -  4.9 i

Total displacement = 4j +7.5 i -6.8j+3.7i-3.6j-5.3i+3.7j-5.6i-4.4j-4.9i

= -4.6 i -7.1 j

magnitude of displacement = \(\sqrt{(4.6^2+7.1^2)}\)

= 8.46 m

Direction

Tanθ = 7.1/ 4.6

θ = 57⁰ south of west .

distance walked = 4+7.5 +6.8+3.7+3.6+5.3+3.7+5.6+4.4+4.9

= 49.5 m

Answer:

equal to

Explanation:

i got it right hope it helped :)

When the light bulb with a resistance of 10 Ω is replaced by a bulb with 20 Ω of resistance, replacing the light bulb with a higher resistance would result in a decrease in current, brightness, power consumption, and heat generation in the circuit.

Here are the key changes:

1. Current: The current in the circuit would decrease. According to Ohm's Law (I = V/R), as the resistance increases and the voltage (V) remains constant, the current (I) decreases.

2. Brightness: The brightness of the bulb would decrease. Since the current is reduced, less electrical energy is flowing through the bulb, resulting in lower light output.

3. Power: The power consumed by the circuit would decrease. Power is calculated using the formula P = IV, where P is power, I is current, and V is voltage. As the current decreases, the power consumption of the circuit decreases.

4. Heat dissipation: The bulb with a higher resistance would generate less heat compared to the lower resistance bulb. This is because heat dissipation in a circuit is directly proportional to the square of the current (P = I²R), and with reduced current, less heat would be produced.

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The work done by the force on the particle is 39J and  the angle between F and s is 19.7 degree.

An item with mass is pulled or pushed which alters its velocity. A material that has the ability to change a body's rest or motion state is referred to as an external force. It possesses a magnitude and a direction.

Force F = (Fx, Fy)

Displacement S = (Sx,Sy)

Fx=10N

Fy=-1N

Sx=4m

Sy=1m

F=(10,-1)N and S=(4,1)m

Work done is calculated by taking dot product of force and displacement vector:

W=F·S

W=10×4 + (-1)×1

W=40+(-1)=39J

W = 39 J

To find angle between F and s:

\(|F|=\sqrt{10^2+(-1)^2}\)

|F| = √101

|S| = √(4² + 1²)

|S| = √17

W  = |F| |S| cosθ

39 = √101 √17 cosθ

θ = 19.7.

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Answer:

0.5 mL/min

Explanation:

There are 1000 mL in a L, and 60 minutes in an hour.

0.03 L/hr × (1000 mL/L) × (1 hr / 60 min) = 0.5 mL/min

Answer:

1. Schedule your activities

2. Prioritize the more important tasks

3. Avoid procrastination

Explanation:

Time-management techniques are strategies or methods developed by people to help them effectively manage their time. My best friend in the scenario above cannot effectively manage his time because he has a lot of activities crowding up his time.

To get better in his grades, he should strike a balance between school work and extracurricular activities. He should make a workable schedule where only the most important tasks are prioritized. He should also learn to execute these tasks on time without postponing them.

Answer:

Sample Response: He should decide on a study time that works best for him, create a study schedule, and manage his study sessions by using a daily to-do list

Explanation:

got it right on edge 2021

To further stretch the spring from l m to L m, the work done is given by W = 0.5k (L² - l²), where k is the spring constant and l and L are the initial and final lengths respectively.

Given, it requires a force of 18 N to hold a spring stretched l m beyond its natural length.Since the work done is equal to the change in potential energy, therefore, the work required to further stretch the spring from l m to L m is given by:

W = Uf - Ui

= 0.5 k L² - 0.5 k l²

Now, we have k = F / x where F is the force required to stretch the spring by a distance x.So,

k = 18 / l

Also, the force required to stretch the spring to length L is given by:

F' = k (L - l) = 18 (L - l) / l

Therefore, the work done is given by:

W = 0.5 k (L² - l²) = 0.5 x 18 / l x (L² - l²) = 9 (L² - l²) / l

Hence, the work done to further stretch the spring from l m to L m is 9 (L² - l²) / l J.

Therefore, the work required to stretch the spring from l m to L m is given by the equation: W = 9 (L² - l²) / l.

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The magnitude of the complex power measured across the load is 1200VA.

The magnitude of the complex power measured across the load is 1200VA.

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Explanation:

Well it depends on what type of energy all plants produce energy for them to survive but if its a certain energy your looking for make sure to put it in you quesion

Answer:

protons + neutrons

Explain:

Is equivalent to the number of protons and neutrons in the atom

Answer:

The atomic mass of an element is underneath the symbols whereas for Li or Lithium it is 6.94 then for B or Boron it is 10.81.

Explanation:

So in otherwords the atomic mass is right under the symbol of an element.

Answer:

the speed of the wave on the string is 43.16 m/s

Explanation:

Given;

first harmonic of the wave formed by the string, f₀ = 26 Hz

length of the string, L = 0.83 m

The wavelength for first harmonic of the wave is calculated as;

L = N ----> N

L = λ₀/2

λ₀ = 2L

The speed of the wave on the string is calculated as follows;

v = f₀λ₀

v = f₀ x 2L

v = 26 x 2 x 0.83

v = 43.16 m/s

Therefore, the speed of the wave on the string is 43.16 m/s

Your de Broglie wavelength while walking at 1 m/s with a mass of 80 kg is approximately 8.2825 x 10^--37 meters. This is an incredibly small wavelength, which is typical for macroscopic objects like humans

To estimate your de Broglie wavelength while walking at a speed of 1 m/s, we can use the de Broglie wavelength formula:

λ = h / p

where λ is the de Broglie wavelength, h is Planck's constant, and p is the momentum of the object.

The momentum of an object can be calculated as:

p = m * v

where m is the mass of the object and v is its velocity.

Plugging in the given values, we get:

p = 80 kg * 1 m/s = 80 kg m/s

Using Planck's constant h = 6.626 x 10^-34 m^2 kg/s, we can now calculate the de Broglie wavelength:

λ = h / p = 6.626 x 10^-34 m^2 kg/s / 80 kg m/s ≈ 8.3 x 10^-37 meters

However, it's important to note that the de Broglie wavelength is only significant for objects with very small masses or very high velocities, such as electrons or other subatomic particles.

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Answer:

Push or pull

Explanation:

Elastic potential energy is initially at rest, making it move.

Elastic potential energy is what causes a ball to bounce or rebound because it is transformed into kinetic energy and used to raise the ball back up. However, because some of the ball's energy was transferred to the ground or changed into sound (in the noise it makes upon impact) and heat energy, the ball won't go as high as it did at first (friction with the table). Additionally, even though we cannot see it, the ball alters once it strikes the ground or a table, energy is needed to take shape for a brief period of time.

Because of this, each bounce has a slightly lower height than the one before it. The ball has some kinetic energy when it hits the floor, but some of it is changed, so it loses some of it each time it bounces. After a few bounces, the ball has so little kinetic energy remaining that it stops bouncing.

Thus the correct answer is option A.

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The total magnification will be 200x.

It quantifies the comparison of the image's size to that of the object's size. In terms of how big or little the picture is produced, it informs us about the image. The height of the picture divided by the height of the object is known as magnification. m=hiho.

Objective lens - An essential component of the microscope's optics is the objective lens. The sample, specimen, or item being examined is situated close to the microscope's objective. It plays a crucial part in imaging since it creates the initial magnified picture of the sample.

Ocular lens - The component of the microscope known as the eyepiece, or ocular lens, is responsible for enlarging the picture created by the objective so that it can be viewed by the human eye.

20x objective lens was used by specimen

10x ocular lens was also used by him.

we have to find the total magnification.

For calculating the total magnification we 'll simply do multiplication

Total Magnification = 20 × 10x

Total Magnification = 200x

So , the total magnification will be 200x .

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Answer:

TRUE

Explanation:

THERE YOU GOOO!!!!!!!!!!!!!!

(also hi lulu)

Answer:

(d) R>1

Explanation:

Let the wave is passing from the medium \(M_1\) to medium \(M_2\) as shown in the figure.

Given that there is an increase in the speed in the medium \(M_2\) , this is only due to the fact that medium

As when light passes from denser to rare medium, it moves away from the normal as shown in the figure.

So, the angle made by light rays with the normal in the rare medium, angle of refraction \(r\), is more than the angle made by light rays with the normal in the denser medium, angle of incident \(i\).

Hence, r>i

\(\Rightarrow \frac r i >1\)

\(\Rightarrow R >1\)  [as r/i = R]

Hence, option (d) is correct.

1. Using electricity in a lamp is Useful when electrical energy is converted to light energy and wasteful when electrical energy is converted to thermal (heat) energy.

2. Using petrol (gasoline) in a car engine is useful when Chemical energy is converted to mechanical energy and kinetic energy. And wasteful when chemical energy is converted to thermal energy.

3.  Using electricity in a motor is useful when electrical energy is converted to mechanical energy. And wasteful when thermal and sound energy.

Using gasoline in a car engine is all about the convertion of chemical energy that is in the hydrocarbons in gasoline into kinetic energy, so that a car can move.

This process, is not really efficient, because some energy is wasted as heat and noise as a result of friction and other processes.

This is why many automobiles have an energy efficiency rating, that can calculate the amount of gasoline necessary to go a specific distance.

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