Why are earths rocks generally younger than earth itself.

Answer:

a = 1.428 [m/s²]

v₀ = 5 [m/s]

Explanation:

To solve this problem we must use the following equation of kinematics.

\(x=x_{o}+v_{o}*t+\frac{1}{2}*a*t^{2}\)

where:

x = final point [m]

x₀ = initial point [m]

v₀ = initial velocity [m/s]

a = acceleration [m/s²]

t = time [s]

But we need to use this additional equation.

\(v_{f}=v_{o}+a*t\)

where:

vf = final velocity = 15 [m/s]

Now we can use this equation, replacing it, in the first one. We must bear in mind that the difference among x - x₀ is equal to 70 [m]

\(x-x_{o}=v_{o}*t+\frac{1}{2}*a*t^{2} \\x-x_{o}=(v_{f}-a*t)*t+\frac{1}{2} *a*t^{2}\\70=(15-a*t)*t+\frac{1}{2}*a*t^{2}\\70=15*t-a*t^{2} +\frac{1}{2}*a*t^{2} \\70=15*t-\frac{1}{2}*a*t^{2}\\70=15*(7)-\frac{1}{2} *a*(7)^{2}\\105-70=0.5*a*49\\35=24.5*a\\a=1.428[m/s^{2} ]\)

Now replacing this value in the second equation, we can find the initial velocity.

\(15=v_{o}+1.428*7\\v_{o}=5[m/s]\)

Answer: Because there  are more daylight hours in june then december  

The electric field between the plates of an air capacitor of plate area 0.8 m^2 and the Maxwell's displacement current, we need additional information such as the distance between the plates and the voltage applied to the capacitor.

The electric field between the plates of a capacitor is given by the formula E = V/d, where V is the voltage applied to the capacitor and d is the distance between the plates. If we have the value of d and V, we can calculate the electric field.

Maxwell's displacement current, we need to know the rate of change of the electric field in the region between the plates of the capacitor. This can be difficult to determine without additional information about the circuit. However, we can say that the displacement current will be proportional to the rate of change of the electric field and the permittivity of free space. If we have the value of the electric field and the rate of change of the field, we can calculate the displacement current.

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Answer:

O Atoms in gas can move freely

Explanation:

Depends on where it is going please follow me

Answer:

its option C

Explanation:

just took it

Answer:

Jorge wanted to know where the apples were

Explanation:

Ya see, I don't want to explain, cuz I guessed. Also I'm on episode 499 of naruto so yeah

Answer:

B:Jorge wanted to know where the apples were.

Explanation:

Globular clusters include, old, low mass stars with fewer heavy components and hence exist not ideal places for life

Globular clusters exist as stable, tightly bound clusters of tens of thousands to millions of stars. They exist associated with all kinds of galaxies. Globular clusters exist typically much larger than open clusters and stand tightly gravitationally bound.

A globular cluster exists as a spheroidal conglomeration of stars. Globular clusters exist bound together by gravity, with a more increased concentration of stars towards their centers. They can include anywhere from tens of thousands to numerous millions of member stars. Their name exists derived from the Latin globules.

Globular clusters exist discovered in nearly all galaxies. In spiral galaxies like the Milky Way, they are mostly discovered in the outer spheroidal parts of the galaxy – the galactic halo.

The globular cluster stands a large group of old stars that exist closely packed in a symmetrical, somewhat spherical form. Globular clusters, so named because of their spherical appearance, exist as the largest and most massive star clusters.

Hence, Globular clusters include, old, low mass stars with fewer heavy components and hence exist not ideal places for life.

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The critical angle is the angle of incidence at which light traveling from a denser medium to a less dense medium is refracted at an angle of 90 degrees. To find the critical angle, we can use the formula: sin(critical angle) = 1 / refractive index of the medium.


Given refractive indices of air and water, we can find the critical angle for light traveling from water to air:
sin(critical angle) = 1 / 1.33
sin(critical angle) = 0.75
Taking the inverse sine of both sides, we get:
critical angle = sin^-1(0.75)
critical angle = 48.8 degrees
Therefore, the critical angle for light traveling from water to air is approximately 48.8 degrees. This means that if the angle of incidence of light on the water surface is greater than 48.8 degrees, the light will not be refracted into the air, but will be totally reflected back into the water. This phenomenon is called total internal reflection and is used in many optical devices such as fiber optics and prism binoculars.

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Answer:

C

Explanation:

After catching the ball, the boy and skateboard will be moving with a speed of approximately 0.44 m/s.

According to the principle of conservation of momentum, the total momentum before and after an interaction remains constant if no external forces act on the system. In this case, the initial momentum of the ball is equal to the final momentum of the boy and skateboard system.

The initial momentum of the ball can be calculated as the product of its mass (2.0 kg) and velocity (12 m/s), which is 24 kg·m/s.

Since the boy and skateboard are initially at rest, their combined initial momentum is zero.

After catching the ball, the total momentum of the system is still 24 kg·m/s. This momentum is shared between the boy, skateboard, and the ball.

To find the final velocity of the boy and skateboard, we can divide the total momentum by their combined mass: 24 kg·m/s / 55 kg = 0.4364 m/s = 0.44 m/s.

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Answer:

in the nucleus of the atom

Explanation:

a p 3 x

Answer:

hey

Explanation:

hey

To increase power, three factors that can be decreased are sample size, variability, and significance level.

Power refers to the ability of a statistical test to detect a true effect or difference when it exists. Increasing power is desirable as it reduces the chances of committing a Type II error, which is failing to reject a false null hypothesis. To increase power, three factors can be decreased:

1. Sample size: A larger sample size increases the likelihood of detecting a true effect, thereby increasing power. Decreasing the sample size would have the opposite effect.

2. Variability: When the data points in a sample are spread out or have high variability, it becomes more challenging to detect a true effect. By reducing variability through careful study design or controlling confounding factors, power can be increased.

3. Significance level: The significance level, often denoted as alpha (α), represents the threshold for rejecting the null hypothesis. By decreasing the significance level (e.g., from 0.05 to 0.01), the test becomes more stringent, and it requires stronger evidence to reject the null hypothesis, thereby increasing power.

In summary, to increase power in a statistical test, one can decrease the sample size, reduce variability, and lower the significance level. These adjustments enhance the test's ability to detect true effects and improve the reliability of the statistical analysis.

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Answer:

D

Explanation:

this is because the formula for frequency is

f = 1/T

and it is a reciprocal

Answer:

2as = v² - u²

v = √(2as + u²)

v = √(2 x 4 x 400 + 13²)

v = 58 m/s

Explanation:

Answer:

58

Explanation:

correct

The wavelength of the light according to the ship is 600 nm.

1. To determine the velocity of the shuttle relative to Bob, we can use the relativistic velocity addition formula:

v = (v1 + v2) / (1 + (v1*v2) / c^2)

Given:

v1 = 0.6c (velocity of the spaceship)

v2 = 0.7c (velocity of the shuttle relative to the spaceship)

Substituting the values into the formula:

v = (0.6c + 0.7c) / (1 + (0.6c * 0.7c) / c^2)

v = (1.3c) / (1 + 0.42)

v = (1.3c) / 1.42

v ≈ 0.915 c

Therefore, the shuttle is moving at approximately 0.915 times the speed of light (0.915c) relative to Bob.

The answer is not provided in the given options.

2. Since the shuttle is traveling directly away from Bob, the shuttle is moving away from Bob.

The answer is 2. Away from.

3. To determine the wavelength of the light according to the ship, we can use the relativistic Doppler effect formula:

λ_ship = λ_earth * sqrt((1 + β) / (1 - β))

Given:

λ_earth = 300 nm (wavelength detected by Earth)

v = 0.6c (velocity of the spaceship)

Substituting the values into the formula:

λ_ship = 300 nm * sqrt((1 + 0.6c / c) / (1 - 0.6c / c))

λ_ship = 300 nm * sqrt((1 + 0.6) / (1 - 0.6))

λ_ship = 300 nm * sqrt(1.6 / 0.4)

λ_ship = 300 nm * sqrt(4)

λ_ship = 300 nm * 2

λ_ship = 600 nm

Therefore, the wavelength of the light according to the ship is 600 nm.

The answer is 2. 600 nm.

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approximately 2.093 x 10^(-6) cubic meters (or 2.093 milliliters) of coffee has spilled out of the beaker.To calculate the volume of coffee that has spilled out of the beaker, we can use the concept of thermal expansion. The change in volume is given by the formula ΔV = βVΔT, where β is the coefficient of volume expansion, V is the initial volume, and ΔT is the change in temperature.

First, let's convert the initial volume to cubic meters: V = 0.858 x 10^(-3) m^3.
Next, we calculate the change in temperature: ΔT = 90.6 - 18.2 = 72.4 °C.
The coefficient of volume expansion for water (and coffee) is approximately β = 3.4 x 10^(-4) °C^(-1).
Plugging in these values into the formula, we get:
ΔV = (3.4 x 10^(-4) °C^(-1)) * (0.858 x 10^(-3) m^3) * (72.4 °C) = 2.093 x 10^(-6) m^3.

Therefore, approximately 2.093 x 10^(-6) cubic meters (or 2.093 milliliters) of coffee has spilled out of the beaker.

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Answer:

Oblique

Explanation:

I think that's the answer I was told this but forgot if this is the right answer if not then sorry

The visible spectrum is composed of red, orange,yellow,  green, blue, violet, indigo.

The visible spectrum refers to the portion of the electromagnetic spectrum that can be seen with the eyes. All other portions of the electromagnetic spectrum are invisible.

The question is incomplete as the details are missing. The visible spectrum is composed of red, orange,yellow,  green, blue, violet, indigo.

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Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

Answer:

latent heat, also called the heat of vaporization

Answer:theory

Explanation:

Answer:

double Replacement

Explanation:

The mutual replacement of radical and ions between the two compounds or molecules is called double replacement.

General equation : AB+CD = AD +B

The incorrect statement is a. The ball does not accelerate in the horizontal direction.

When the ball is projected horizontally, it moves forward with a constant horizontal velocity. This means that it does not accelerate in the horizontal direction, so statement a is incorrect. However, in the vertical direction, the ball is subject to the force of gravity, which causes it to accelerate downwards at a rate of 9.8 m/s^2. This means that the ball's vertical velocity changes by 9.8 m/s each second. When the ball hits the ground, it has both a horizontal and vertical velocity, so statement c is also incorrect.

The incorrect statement is a. The ball does not accelerate in the horizontal direction. However, in the vertical direction, the ball is subject to the force of gravity, which causes it to accelerate downwards at a rate of 9.8 m/s^2. When the ball hits the ground, it has both a horizontal and vertical velocity, so statement c is also incorrect.

When a ball is projected horizontally from the top of a cliff and free falls to the ground, it does not accelerate in the horizontal direction, but it does accelerate in the vertical direction due to the force of gravity. When the ball hits the ground, it has both a horizontal and vertical velocity.

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Answer:

2 m/s

Explanation:

Given that,

Mass of a man, m₁ = 75 kg

Mass of object, m₂ = 5 kg

Velocity of the object, v₂ = 30 m/s

We need to find the recoil velocity of the man. Let it is v₁. In the whole process, the momentum of the system will remain conserved such that,

\(m_1v_1=m_2v_2\\\\v_1=\dfrac{m_2v_2}{m_1}\\\\v_1=\dfrac{5\times 30}{75}\\\\v_1=2\ m/s\)

So, the recoil velocity of the man is 2 m/s

The frequency of blue light having a wavelength of 425 nm is 6.918 THz.

The frequency of blue light with a wavelength of 425 nm is 6.04 x 10^14 hertz. This frequency is calculated by dividing the speed of light (3 x 10^8 m/s) by the wavelength (425 nm) to get a frequency of 6.04 x 10^14 hertz.

The frequency of a wave is the number of complete cycles that the wave makes per second. The higher the frequency, the shorter the wavelength. This is because the shorter the wavelength, the more cycles there can be in a given amount of time, resulting in a higher frequency.

Wavelength is a measure of the distance between two consecutive points of a wave, usually measured in meters or nanometers (nm). It is used to describe the physical size of a wave and its energy. The wavelength of a wave is related to its frequency, which is the number of waves that pass a given point in a certain amount of time. The shorter the wavelength, the higher the frequency, and the more energy is carried by the wave. In light, different colors have different wavelengths, with blue having the shortest and red having the longest.

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Answer:

v_{f}=21.75[m/s] (velocity just before it lands)

t = 2.98 [s]

Explanation:

The key to solving this problem is the initial velocity since when the camera falls it is moving up, we will take this velocity as negative and the acceleration gravitation down as positive.

We will use the following equation of kinematics to solve this problem.

\(V_{f}^{2} =V_{o}^{2}+2*g*y\)

where:

Vf = final velocity [m/s²]

Vo = initial velocity = 7.5 [m/s]

g = gravity acceleration = 9.81 [m/s²]

y = elevation = 27 [m]

\(v_{f}^{2} = - (7.5)^{2} +(2*9.81*27)\\ v_{f}^{2} = 473.5\\v_{f}=\sqrt{473.5}\\v_{f}=21.75[m/s]\)

Now using the following equation of kinematics, we can calculate the time that the fall lasts.

\(v_{f}=v_{o}+g*t\)

\(21.75 = -7.5 +9.81*t\\9.81*t = 29.25\\t = 2.98[s]\)

Answer:

a) 60kg

Explanation:

mass is not affected by gravity

The mass of Joe on the moon is approximately 60 kg. Hence, option (a) is correct.

Given data:

The weight of Joe is, W = 600 N.

The weight of any object is the product of mass and gravitational acceleration of an object. It is the expressed as,

W = mg

Here,

m is the mass of Joe.

g is the gravitational acceleration.

Solving as,

W = mg

600 = m × 10

m = 60 kg.

Thus, we can conclude that the mass of Joe on the moon is approximately 60 kg. Hence, option (a) is correct.

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17.01 m/s is the car’s velocity .

s=ut+at²/2

s-at²/2=ut

u=s-at²/2÷t

u=312/18.4

u=17.01 m/s

"The rate at which an item changes its location" is described by a vector number called velocity. Imagine someone walking swiftly, one step forward, one step back, and starting each step from the same location. Velocity is a vector quantity. Therefore, velocity is cognizant of direction. The direction must be taken into account when determining an object's velocity. A velocity of 55 miles per hour is not adequate information. It is necessary to account for the direction in order to accurately describe the object's velocity. Simply put, the direction of the velocity vector represents the motion of the object.

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Answer:

a cast is something that holds a item in place weather it be a iron sword or a broken arm. a cast is made by hollowing out the inside and placing your item in it.

Explanation:

Answer: See Explanation

Explanation:

Did the car travel at a constant speed?

This means "Is the speed at each interval the same?"

There are 10 intervals for which to calculate from.

For each one, the speed is the distance traveled divided by the time.

Each interval is 1 meter long (distance).

1st: 1 meter / 2.00 s = 0.5 m/s

2nd: 1 meter / (4.00 - 2.00) s = 0.5 m/s

3rd: 1 meter / (6.2 - 4.0) s = 0.454 m/s

Right here you can see that the speed is different, NO is the answer.

Average Speed = total distance divided by total time

v = d / t     v = (10 m) / (20:00 s) = 0.5 (m/s)

Describe the overall motion: (continue on with step one to see the total motion over the 10 meters)

4th: 0.552

5th: 0.472

6th: 0.5

7th: 0.5

8th: 0.4975

9th: 5.39

10th: 0.55

Overall motion stayed steady from 0-2 meters, slowed for the 3rd meter, sped up for the 4th, slowed down the 5th, stayed steady until slowing down in the 8th meter, then increased speed til the 10th meter.

Races would be practical applications to see where people/cars pace themselves, push themselves, etc.