Julie is cycling at a speed of 3.4 meters/second. If the combined mass of the bicycle and Julie is 30 kilograms, what is the kinetic energy?

A.
1.7 × 102 joules
B.
1.5 × 102 joules
C.
2.0 × 102 joules
D.
2.2 × 102 joules

Answer:

4 weight loss

Explanation:

\( \boxed{ \mathrm{Kinetic \: Energy = \frac{1}{2} m {v}^{2} }}\)

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A piece of steel sinks in water because steel is denser than water. However, a steel ship is a hollow object made of steel and contains a lot of air in it. Due to presence of a lot of air in it, the average density of the ship becomes less than the density of water. Hence a ship floats in water.

Answer:

Cause its a steel block

Explanation:

thats like putting a brick in the water and expecting it to float

According to Erik Erickson, people who are most likely to suffer from loneliness are those who have not successfully completed the intimacy versus isolation stage of psycho social development. This stage occurs during young adulthood and involves the development of close, intimate relationships with others. If someone is unable to successfully navigate this stage, they may experience feelings of loneliness and isolation throughout their lives.

There are a number of factors that can contribute to loneliness, including:

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A horizontal dart launch with just an initial velocity of 2. 3 m/s accelerates upwards at a rate of -9.8 m/s2.

acceleration is the rate of change in both speed and distance of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated.

An object has positive acceleration when it is going faster than it was previously. Positive acceleration was demonstrated by the moving car in the first scenario. The acceleration is in a direction that is consistent with the way that the vehicle is moving forward and speeding up.

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Any of the pieces of hard whitish tissue making up the skeleton in humans and other vertebrates.

The calcified material of which bones consist

a) The frequency of the wave emitted by the cellular phone is approximately 8.69×10⁸ Hz.

The frequency (f) of a wave is the number of complete cycles that occur per unit of time. In this case, the wavelength (λ) of the wave is given as 34.5 cm. The speed of light (c) in a vacuum is approximately 3.00×10⁸ m/s.

The relationship between frequency, wavelength, and speed of light is given by the equation c = fλ.

Rearranging the equation, we have f = c/λ.

Plugging in the values, we find f ≈ (3.00×10⁸ m/s)/(34.5×10⁻² m) ≈ 8.69×10⁸ Hz.

b) The magnetic-field amplitude of the wave is approximately 2.06×10⁻¹⁰ T.

The electric-field amplitude (E) and magnetic-field amplitude (B) of an electromagnetic wave are related by the equation B = E/c, where c is the speed of light.

Given the electric-field amplitude as 6.20×10⁻² V/m,

we can calculate the magnetic-field amplitude as B ≈ (6.20×10⁻² V/m)/(3.00×10⁸ m/s) ≈ 2.06×10⁻¹⁰ T.

c) The intensity of the wave is approximately 8.79×10⁻¹⁰ W/m².

The intensity (I) of an electromagnetic wave is the power per unit area carried by the wave. It is given by the equation I = (1/2)ε₀cE², where ε₀ is the vacuum permittivity and E is the electric-field amplitude.

Plugging in the values, we have I ≈ (1/2)(8.85×10⁻¹² C²/N·m²)(3.00×10⁸ m/s)(6.20×10⁻² V/m)² ≈ 8.79×10⁻¹⁰ W/m².

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Answer:

It is A when the firework explodes it creates heat and which makes different colors

Explanation:

The normalization constant A can be determined by integrating the absolute value squared of the wave function over the entire domain and setting it equal to 1, which represents the normalization condition. In this case, the wave function is given by:

ψ(x) = A cos (2πx/L) for -L/4 ≤ x ≤ L/4, and ψ(x) = 0 everywhere else.

To find A, we integrate the absolute value squared of the wave function:

∫ |ψ(x)|^2 dx = ∫ |A cos (2πx/L)|^2 dx

Since the wave function is zero outside the range -L/4 ≤ x ≤ L/4, the integral can be written as:

∫ |ψ(x)|^2 dx = ∫ A^2 cos^2 (2πx/L) dx

The integral of cos^2 (2πx/L) over the range -L/4 ≤ x ≤ L/4 is L/8.

Thus, we have:

∫ |ψ(x)|^2 dx = A^2 * L/8 = 1

Solving for A, we find:

A = √(8/L)

The probability of finding the particle in a specific region can be calculated by integrating the absolute value squared of the wave function over that region. In this case, if we want to find the probability of finding the particle in the region -L/4 ≤ x ≤ L/4, we integrate |ψ(x)|^2 over that range:

P = ∫ |ψ(x)|^2 dx from -L/4 to L/4

Substituting the wave function ψ(x) = A cos (2πx/L), we have:

P = ∫ A^2 cos^2 (2πx/L) dx from -L/4 to L/4

Since cos^2 (2πx/L) has an average value of 1/2 over a full period, the integral simplifies to:

P = ∫ A^2/2 dx from -L/4 to L/4

= (A^2/2) * (L/2)

Substituting the value of A = √(8/L) obtained in part (a), we have:

P = (√(8/L)^2/2) * (L/2)

= 8/4

= 2

Therefore, the probability of finding the particle in the region -L/4 ≤ x ≤ L/4 is 2.

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In order to determine the energy delivered in the given time, first calculate the electric power of the starter, by using the following formula:

where,

I: current = 210 A

V: voltage = 12 V

Replace the previous values of the parameters into the formula for P:

where W means watts.

Now, consider that power is the energy delivered per second. Then, for

10.0 s the energy delivered is:

Hence, the energy delivered by the starter is approximately 2.5*10^4 J

The stunt coordinator needs to collect a variety of measurements in order to determine if the car will hit its target or not. He needs the height of the cliff, the mass of the car, and the speed of the car.

Correct option is 2.

These measurements are essential in order to accurately calculate the trajectory of the car when it is dropped from the cliff. The car's mass will affect its speed, while the speed will affect how far the car can travel. The height of the cliff will determine the starting point of the car's trajectory and the amount of time it will take for the car to reach the bottom.

If any of these measurements are incorrect, the stunt coordinator will not be able to accurately predict the path that the car will take. Therefore, it is necessary for the stunt coordinator to collect all of these measurements in order to know if the car will hit its target.

Correct option is 2.

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The stunt coordinator needs more measurements besides just the speed of the car, the mass of the car, and the height of the cliff. These factors also include the angle of launch, the trajectory of the stunt and various environmental factors.

The question involves understanding whether the stunt coordinator has collected all necessary measurements. The answer is 4) No, he needs to collect more measurements. Understanding whether a car will hit its target in a stunt involves various factors: the speed of the car, the angle of launch, the mass of the car, the height of the cliff, the trajectory of the stunt, and environmental factors like air resistance and wind. It's not just about the height of the cliff and the mass of the car or just the speed of the car. Therefore, more measurements and considerations are necessary to ensure the stunt's success.

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A 600-kg satellite is in a circular orbit about earth at a height above earth equal to earth’s mean radius. find (a) the satellite’s orbital speed.  

T = 39.8hr

mass of the satellite = 600 Kg

mass of earth = 5.98 x 10²⁴ Kg

height of the satellite

  r = 2 R_e

R_e is radius of earth = 6.38 x 10⁶ m

Assuming orbital velocity of the satellite

       v = 5.59 x 10³ m/s

      time period = 2 pi r/v

      time period = 2pi*2*6.38*10^6/5.59*10^3

       T = 14342.3 s

     T = 14342.3/60*60 Hr

     T = 3.98 Hr

An orbit is a regular, repeating course that one object in area takes around any other one. An item in an orbit is called a satellite tv for pc. A satellite can be herbal, like Earth or the moon. Many planets have moons that orbit them. A satellite tv for pc can also be guy-made, just like the global space Station.

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Answer:

A. Millimeters

Explanation:

C. is a unit of weight-wrong

D. is a unit of volume-wrong

B .kilometers are too large

Answer: A. Millimeters

Explanation:

Because it is more reasonable

The given acceleration of a point moving along a straight line is a = -cv", where c is a constant.

We can integrate this acceleration to obtain the velocity v as a function of displacement s: a = d²s/dt² = dv/dt * ds/dv. Integrating both sides with respect to v and s, we get: ∫vo^v [1/v * dv] = -c/2 ∫0^s [1/v² * ds], ln(v/v0) = c/2 * (1/vs - 1/vo), v = vo * exp(-c/2 * (s - s0)), where s0 is the initial displacement when v = vo. Now, we want to find the distance the point moves before its velocity decreases to vs/2. This means we need to solve for s when v = vs/2: vs/2 = vo * exp(-c/2 * (s - s0)). Taking the natural logarithm of both sides, we get: ln(vs/2) = ln(vo) - c/2 * (s - s0). Rearranging, we get: s - s0 = (2/c) * [ln(vo) - ln(vs/2)], s - s0 = (2/c) * ln(2vo/vs). Therefore, the distance the point moves before its velocity decreases to vs/2 is given by s - s0, which is (2/c) * ln(2vo/vs).

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Answer: yes

Explanation:

lifting an object is doing work

Explanation:

Kinetic energy of an object is given by :

\(E=\dfrac{1}{2}mv^2\)

Where

m is mass and v is velocity of the object

A. Mass, m = 300 kg.

Speed, v = 60 km/h = 16.67 m/s

\(E=\dfrac{1}{2}\times 300\times 16.67^2\\\\=41683.33\ J\)

B. Mass, m = 1100 kg.

Speed, v = 60 km/h = 16.67 m/s

\(E=\dfrac{1}{2}\times 1100\times 16.67^2\\\\=152838.89\ J\)

C. Mass, m = 900 kg.

Speed, v = 80 km/h = 22.22 m/s

\(E=\dfrac{1}{2}\times 900\times 22.22^2\\\\=222177.78\ J\)

D. Mass, m = 2000 kg.

Speed, v = 50 km/h = 13.88 m/s

\(E=\dfrac{1}{2}\times 2000\times 13.88^2\\\\=192654.4\ J\)

The kinetic energy in case C is maximum.

There are several differences in behavior between an electrically conducting sphere and an insulating sphere.
Firstly, a conducting sphere can be charged by friction, whereas an insulating sphere cannot. This is because the conducting sphere allows electrons.

Secondly, an uncharged object can be charged by touching it to a charged conducting sphere, but not by touching it to a charged insulating sphere. This is because the conducting sphere allows charge to flow easily between objects, while an insulating sphere does not.

Excess charge placed on a conducting sphere becomes distributed over the entire surface of the sphere. Excess charge placed on an insulating sphere can remain where it is placed. conducting spheres have mobile electrons that can move freely, allowing the charge to distribute evenly over the surface  Insulating spheres have electrons that are not as mobile, which means the charge cannot move as freely and tends to remain where it was placed. the fact that polarization occurs in conducting spheres when brought near a charged object, while insulating spheres do not experience this effect.

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Answer:

D

Explanation:

Memory, CPUs, and drives are three components of configuration best practices. Device configuration is crucial because when done correctly, it allows for the best usage of the cloud environment from the device.

Processor configuration is crucial since improper configuration might lead to a decline in performance. For instance, CPU Affinity comes into play when certain apps are not intended to run simultaneously on several processors. Wilson & Vanderburg state that "CPU affinity is the relationship between threads from a given VM and a certain processor, wherein all ensuing requests from that process are processed by the same processor" (CPU Affinity, p. 237). There is a warning in the text that suggests it could be preferable to let the hypervisor choose the best processor based on the job. Different configurations would be necessary in response to shifting data needs, such as when a cloud system processes more or less data.

A Service Level Agreement (SLA) governs all resources a Cloud Service Provider (CSP) offers (SLA). Quotas are specified with a minimum and maximum, making them a useful resource for CSPs. Due to the limited resources that CSPs have, they must make sure that customers only receive the services that they are entitled to under their SLAs. They would never turn a profit, in my opinion, if they offered all of their clients infinite resources

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Answer:

Most pneumonia occurs when a breakdown in your body's natural defenses allows germs to invade and multiply within your lungs.

Explanation:

The Spring constant of the trampoline when a branch of mass 0.35 kg falls on it is 910 N/m.

Spring constant is the as force constant, and it is defined as the ratio of the force to extension of an elastic material.

To calculate the spring constant of the trampoline, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the spring constant of the trapoline is 910 N/m.

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The value of the mean of all values of d (Hd) is -0.04.

As per data the following temperatures,

Temperature (°F) at 8 AM 98.3

Temperature (°F) at 12 AM 99.1 98.8 99.2 97.1 97.4 97.8 97.2

Temperature (F) at 8 AM 99.3 98.8 97.6 97.7 97.1

Temperature (°F) at 12 AM 99.1 99.2 97.8 972 97.4

Let the temperature at 8 AM be the first sample, and the temperature at 12 AM be the second sample. Then,

d = x₂ - x₁

Now, we need to find the values of d for all five subjects.

Therefore, d is as follows:

d₁ = 99.3 - 99.1

   = 0.2

d₂ = 98.8 - 99.2

    = -0.4

d₃ = 97.6 - 97.8

    = -0.2

d₄ = 97.7 - 97.2

   = 0.5

d₅ = 97.1 - 97.4

    = -0.3

In general, Hd represents the mean of all values of d.

Thus, the value of Hd is:

Hd = (0.2 + -0.4 + -0.2 + 0.5 + -0.3) / 5

     = -0.04

Thus, the value of Hd is -0.04.

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Answer:

The friction of braking heats up the tire and the road. The temperature is so high that it reaches the melting point of the rubber in the tire. The melting rubber is what leaves a mark on the road.

Explanation:

Answer:

the friction of braking heats up the tires and the road. then the temperature gets even hotter to the point where it melts the rubber.

Explanation:

this is my answer so be careful how you copy it, but you've got this guys schools is almost out stay strong an have fun and be safe this summer keep pushing <33.

remember you're loved by many

- Jason Edwards 5/15/23

The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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Answer:

It can help take your mind off of it. and help you get outside and in the world.

Explanation:

Answer:

1 it could have been the way he put them in and 2it could be the directions there in.