18. [-/1 Points] DETAILS If the half-life of nickel-63 is 92 years, approximately how much time will be required to reduce a 1 kg sample to about 1g? years Submit Answer O DELL Q Your best submission

Answer:60 W

Explanation:

In this case, the compression of the spring when the bullet-mass system comes to rest is 1.12 cm.

The initial momentum of the bullet-mass system is given by p = mv.

After the collision, the system comes to rest, so the final momentum is zero.

By the law of conservation of momentum, the initial momentum must equal the final momentum:

mv = 0

Therefore, v = 0, and the bullet-mass system is at rest after the collision.

The kinetic energy of the system before the collision is given by KE = (1/2)mv^2. A

fter the collision, all of this energy is transferred to the spring as potential energy.

The potential energy stored in a spring with spring constant k and compression distance x is given by PE = (1/2)kx^2.

So, we can set the initial kinetic energy equal to the final potential energy:

(1/2)mv^2 = (1/2)kx^2

Solving for x, we get:

x = sqrt((mv^2)/k)

Plugging in the given values for m, v, and k, we get:

x = sqrt((m(5.00e2 m/s)^2)/k) = 1.12e-2 m or 1.12 cm (rounded to 2 decimal points)

Therefore, the compression of the spring when the bullet-mass system comes to rest is 1.12 cm.

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1. The resistance of the coil is 20 Ω

2. The new resistance of will be 200 Ω

3. The resistance of wire will be 2000 Ω

4. The current through the remote control is 0.33 A

5. The potential difference is 100 V

The resistance of the coil can be obtain as follow:

Voltage (V) = Current (I) × resistance (R)

120 = 6 × resistance

Divide both sides by 6

Resistance = 120 / 6

Resistance = 20 Ω

The new resistance can be obtain as follow:

L₁ / R₁ = L₂ / R₂

Inputting the given parameters, we have:

L / 100 = 2L / R₂

Cross multiply

L × R₂ = 100 × 2 L

L × R₂ = 200L

Divide both sides by L

R₂ = 200L / L

New resistance = 200 Ω

The new resistance can be obtain as follow:

R₁r₁² = R₂r₂²

Inputting the given parameters, we have:

500 × r² = R₂ × (0.5r)²

500 × r² = R₂ × 0.25r²

Divide both sides by 0.25r²

R₂ = (500 × r²) / 0.25r²

New resistance = 2000 Ω

The current can be obtained as follow:

Voltage (V) = Current (I) × resistance (R)

3 = I × 9

Divide both sides by 9

I = 3 / 9

Current = 0.33 A

The potential difference can be obtained as follow:

Potential difference (V) = Current (I) × resistance (R)

Potential difference = 2 × 50

Potential difference = 100 V

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Answer:

0.10 g/cm3

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The marble travel from the top of the ramp is  56.25 m.

Ramp is can be understand in physics, such as the inclined planes, also referred to as ramps . That means,ramp is a type of simple machine which manipulate the direction and magnitude of a force. It is very useful machine by which we can understand the problems in mechenics .

We are given that,

The marble rolls down from the ramp in time = t = 5s

Acceleration of the marble due to gravity = a = 4.5 m/s²

Therefore , for getting the distance (s) of the marble which travelled from the top of the ramp by using the equation of motion i.e. given as,

s = ut + (1/2) at²

Here the marble released from thew rest at the top of the ramp so that initial velocity u = 0 , therefore after putting the value above equation can be written as,

s = (1/2)× 4.5 m/s²×5s × 5s

s = 56.25 m

Hence, the marble travel from the top of the ramp 56.25 m after 5 seconds.

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The frequency of the waves is 0.88 Hz.

It is given to us that -

Ocean waves crash on the beach at a velocity of 3. 5 m/s

The distance between the crests of each wave is 4 m

We have to find the frequency of the waves.

We know that the velocity of the ocean waves can be represented by the formula as -

v = f * λ ---- (1)

where,

f = frequency of the ocean waves

λ = distance between the crests of each wave

According to the given information, we have -

velocity, v = 3.5 m/s

and, distance between the crests of each wave, λ = 4 m

Substituting these values in equation (1), we can find out the frequency of the ocean waves as -

v = f * λ

=> 3.5 = f * 4

=> f = 3.5/4

=> f = 0.88 Hz

Thus, the frequency of the waves is 0.88 Hz.

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Answer:

B. Conductivity.

Explanation:

Conductivity is the quantity of heat passing per second through a slab of unit cross-sectional area when the temperature gradient between the two faces is unity when put in heat.

The component form of the vector - u + w is determined as  -2i + 3j.

The component vector V is calculated from the summation of vector U and vector W.

v = -u + w

Given;

v = -(2i - j) + i + 2j

v = -2i + j + 2j

v = -2i + 3j

                                     y - axis        

                                        ↑  

                                        ↑  

                                        ↑ 3j

                                        ↑

x - axis  ←    ←    ←    ←    ←

                      2i

The complete question is below:

if u = 2i - j  and w = i + 2j, find the component form of ~v = -u + w~ and sketch the specified vector operations geometrically.

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Answer:

KE=1/2mv^2

135.5=1/2*14*v^2

v=4.39 m/s

Explanation:

Racial Formations essay reading, race is defined as a socio historical concept.

According to the authors of the "Racial Formations" essay, race is a socio-historical concept that is constantly being constructed and reconstructed by society. This means that race is not a fixed biological category but a product of social, cultural, and historical processes that shape our understanding and interpretation of human differences. The authors argue that the concept of race is not based on any objective biological criteria, but rather on socially constructed ideas about physical and cultural differences that are used to justify power relations and social inequalities.

I agree with this definition of race as a socio-historical concept because it acknowledges that race is not a natural or biological phenomenon, but rather a product of human history and social relations. It recognizes that race is not something that is fixed or immutable, but rather something that is constantly being constructed and reconstructed by society through processes of racialization and racial formation. This perspective challenges the traditional biological concept of race, which assumes that human differences are based on fixed and immutable categories such as skin color, facial features, or genetic makeup.

In reality, race is socially constructed and can change over time and across different societies. For example, what is considered "black" or "white" in one society may be different in another, and what is considered "racial" in one context may not be in another. The social construction of race is also reflected in the way that racial categories are used to justify power relations and social inequalities, such as in the case of racial discrimination or racial profiling. In summary, race is a socio-historical concept that is shaped by society and culture, and it is important to recognize this in order to challenge racial discrimination and promote social justice.

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Answer:

Heat of vaporization

Explanation:

When water is at high levels of temperature heat is move as an energy source into the air.    

Answer:

\(\boxed {\boxed {\sf Heat \ of \ vaporization}}\)

Explanation:

There are two options for this answer: heat of fusion or heat of vaporization.

Let's define both of the terms.

Heat of fusion:

Heat of vaporization:

The question asks us which type of heat provides the energy for the phase change of a liquid to a gas. Therefore, the correct answer is heat of vaporization.

Answer:

The earth has more gravity so that means if you jump out of a plane without a parachute u will die. But the moon has less gravity so u will not die when hit ground. But someone can probally explain it better than me.

More gravity equals more speed in some cases like falling

The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.

Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.

The distance traveled with the wind in 3 hours is 408 miles.

Therefore, we can write the equation as:

3(x + y) = 408

Divide both sides by 3:

x + y = 136  .... (1)

The distance traveled against the wind in 4 hours is also 408 miles.

Therefore, the equation can be written as:

4(x - y) = 408

Divide both sides by 4:

x - y = 102  .... (2)

Now we can solve these two equations using the elimination method.

Add equations (1) and (2):

x + y + x - y = 136 + 1022x = 238x = 119 mph

Therefore, the speed of the plane in still air is 119 mph.

Now, substitute this value of x in equation (1):

119 + y = 136y = 17 mph

Therefore, the speed of the wind is 17 mph.

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The correct question is:

A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?

The latitude and longitude coordinates for Location C are given as 50S, 68W. Therefore, the correct answer is 4) Cannot discern from the information provided.

Latitude and longitudinal lines are shown on a globe of Earth as parallel and vertical lines. To determine which distance is farther, we need to compare the distance between Location B and the Equator with the distance between Location C and the Equator.

However, the latitude and longitude coordinates for Location B and the specific direction or coordinates of the Equator are not provided. Without this information, it is not possible to determine which distance is farther between Location B and the Equator or Location C and the Equator.

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It will take 43.075 seconds for the shell to reach the distance of 6.00*10^2 m.

Use the equation of motion y(t) = y₀ + v₀t + ½at² -----(1)    for finding the time taken to reach a particular height, Which is 6.00*10^2 = 600 meters. The motion of the shell will be projectile as g(gravitational) pull will be acting against the motion.

So

✦ Plug in the values of the equation.

✦ 600 = 225t - 4.9t² .................... Putting the values in Equation 1

✦ Reorder the equation to form it into the quadratic formula.

✦ 4.9t² - 225t + 600 = 0

✦ Solve for t

✦ t = 43.075

It will take 43 seconds for the shell above the ground.

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When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation).

If the liquid is a mixture, as the more volatile components boil off, the boiling point rises, so adding energy causes the temperature to go up. If you add enough energy, all the liquid evaporates, so there is no liquid temperature

Answer:

e search mo sa utak mo kasi di mo alam

The maximum height H to which she rises above the end of the track that is slanted upward by 48° above the horizontal at its end is 1.11 m

KE = 1 / 2 m v²

PE = m g h

According to law of conservation of energy,

KE ( Initial )  + PE ( Initial ) = KE ( Final ) + PE ( Final )

h ( Initial ) = 0

v ( Initial ) = 6.9 m / s

g = 9.8 m / s²

h = 0.4 m

1 / 2 m vi² + m g hi = 1 / 2 m v² + m g h

1 / 2 m vi² = 1 / 2 m v² + m g h

vi² = v² + 2 g h

6.9² = v² + ( 2 * 9.8 * 0.4 )

v² = 47.61 - 7.84

v² = 39.77 m / s

H = vi² sin²θ / 2 g

θ = 48°

H = 39.77 * sin²48° / ( 2 * 9.8 )

H = 21.78 / 19.6

H = 1.11 m

Therefore, the maximum height H to which she rises above the end of the track is 1.11 m

The given question is incomplete. The complete question is;

The drawing shows a skateboarder moving at 6.9 m/s along a horizontal section of a track that is slanted upward by 48° above the horizontal at its end, which is 0.40 m above the ground. When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find the maximum height H to which she rises above the end of the track.

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The answers for question numbers 3 and 4 is correct. For question number 9, the average speed is 2.5 mi /hr and for question number 10 the speed is 5 yards / s.

We know that,

v = d / t

where,

v = Speed

d = Distance

t = Time

1 ) v = 360 / 6 = 60 km / h

2 ) v = 120 / 3 = 40 mi / h

3 ) v = 18 / 6 = 3 m / s

4 ) v = 1000 / 20 = 50 m / min

5 ) t = 6pm - 5 pm = 1 hr

    v = 2.5 / 1 = 2.5 mi / hr

6 ) v = 1.5 / 0.33 = 4.5 mi / hr ( Since 20 min = 20 / 60 = 0.33 hr )

   d = 4.5 * 1 = 4.5 mi

7 ) d = 20 * 1 = 20 mi ( Since 60 min = 1 hr )

8 ) d = 60 * 2 = 120 mi

9 ) Distance per lap = 0.5 mi

     Total laps = 10

     Total distance = 10 * 0.5 = 5 mi

     v = 5 / 2 = 2.5 mi / hr

10 ) v = 100 / 20 = 5 yards / s

Therefore, the answer for:

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In the open sea, the movement of water particles in a wave becomes negligible at a depth equal to about half the distance from wave crest to wave crest.

Water molecules flow in waves in a cycle that is characterized by oscillations. The route taken by the particles as a wave travels through the water is circular or elliptical, and this motion is frequently referred to as orbital motion. The movement of water molecules is an energy transfer rather than a net transport of water. Water molecules move in circular motion when waves travel through the water, but molecules further below the surface move in smaller circles. The movement of the water atoms is brought on by the energy that is transferred from one atom to the next through the medium of the water. The wave's amplitude, frequency, and water depth are only a few examples of the variables that affect the magnitude and shape of the orbital motion.

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Answer:

you are going 1 mile per hour depending on how fast

Explanation:

Answer:

your answer is 11

Explanation:

Answer:

v = 34.128 km/hr

Explanation:

Given that,

The initial speed of a truck, u = 0

Acceleration of the truck, a = 0.3 m/s²

Distance moved, d = 150 m

Let the final speed of the truck is v. Using third equation of motion i.e.

\(v^2-u^2=2ad\\\\v=\sqrt{u^2+2ad}\)

Put all the values,

\(v=\sqrt{0^2+2\times 0.3\times 150}\\\\v=9.48\ m/s\)

or

v = 34.128 km/h

So, the final speed of the truck is equal to 34.128 km/h.

Answer:

1000m=1km

simple :) . . .

The  is that the velocity of water flow in the pipe on the second floor is 13.6 m/s.

To calculate the velocity of water flow on the second floor, we can use Bernoulli’s principle which states that the pressure and speed of a fluid are inversely proportional to each other. Pressure + (1/2) * Density * Velocity^2 + Density * g * Height

= Constant (where g = acceleration due to gravity)In this problem, since the pressure remains unchanged, we can eliminate the first term on both sides of the equation for both positions. Using Bernoulli’s principle for position 1 and 2 as:

(1/2) * Density * Velocity1^2 + Density * g * H1 = ConstantPosition 2:

(1/2) * Density * Velocity2^2 + Density * g * H2

= ConstantConstant

= (1/2) * Density * Velocity1^2 + Density * g *

H1Taking the difference of the above equations we get:1/2 * ρ * (V2^2 - V1^2)

= -ρghV2^2 - V1^2

= -2ghV2^2 = V1^2 - 2ghV2

= √(V1^2 - 2gh)

The negative sign is ignored as it represents the direction of flow. Putting the values we get:

V2 = √(15^2 - 2 × 9.81 × 3)

= 13.6 m/s

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Answer:

electrical- mechanical

Explanation:

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False. While there are known long-term effects of radiation exposure, the specific effects on an individual can vary depending on factors such as the type and amount of radiation exposure, age, health status, and genetics.

Some known long-term effects of radiation exposure include an increased risk of cancer, genetic mutations, and damage to organs such as the thyroid and reproductive organs. However, the severity and timing of these effects can vary widely among individuals. Additionally, exposure to radiation can also have immediate effects such as skin burns and radiation sickness. It is important to note that the long-term effects of radiation exposure can be reduced through measures such as limiting exposure time, using protective equipment, and following proper safety protocols.
b. False

Long-term effects of radiation on an individual are not entirely predictable. While it is true that exposure to high levels of radiation can lead to an increased risk of certain health issues such as cancer and genetic mutations, the specific outcome for an individual depends on various factors. These factors include the type and amount of radiation, duration of exposure, age, and individual genetic makeup. Additionally, the latent period between radiation exposure and the onset of health issues can vary significantly, making it challenging to predict the exact long-term effects for a particular individual.

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The given statement "The sound source of a synthesizer is an oscillator" is true because sound is created through the manipulation of electrical signals using various modules and filters present and one of them is an oscillator.

A synthesizer is an electronic musical instrument that produces audio signals. This sound is created through the manipulation of electrical signals using various modules and filters present within the synthesizer. Oscillators are one of the sound-generating modules used in synthesizers.

In the context of synthesizers, an oscillator is the sound generator that produces the original sound waves. These waves are then processed by the other modules present in the synthesizer to create the final sound that we hear. Oscillators generate a variety of waveforms including sine, square, triangle, and sawtooth waves that are used to create different types of sounds in a synthesizer.Hence, it is true that the sound source of a synthesizer is an oscillator.

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True, an oscillator is the main sound source of a synthesizer, generating repetitive waveforms which can then be modified by other elements of the device to produce different sounds.

The statement 'the sound source of a synthesizer is an oscillator' is True.

In a synthesizer, an oscillator is the primary source of sound. It generates repetitive waveforms like sine waves, sawtooth waves, and square waves which are then molded and shaped into various sounds by other components of the synthesizer. The different waves produced by the oscillator are what give the synthesizer its ability to generate a wide range of sounds.

One analogy often used to understand this concept is of painting. Consider the oscillator as the 'paint', providing the raw material (i.e., basic waveforms), which is then shaped and moulded into a 'picture' (or a sound) utilizing different 'brushes' (i.e., other synthesizer components).

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The magnitude of the acceleration of the elevator is approximately 3.51 \(m/s^2\).

(a) The scale reading when the elevator is at rest gives the normal force acting on the person, which is equal in magnitude to the person's weight. Thus, the weight of the person is 598 N when the elevator is at rest.

(b) The weight of an object is given by the product of its mass and the acceleration due to gravity.

weight = mass x acceleration due to gravity

598 N = mass x 9.81 \(m/s^2\)

mass = 60.9 kg

Therefore, the person's mass is approximately 60.9 kg.

(c) We can use Newton's second law (F = ma) to find the acceleration of the elevator. The net force acting on the person is given by:

net force = final force - initial force

net force = 384 N - 598 N

net force = -214 N

net force = mass x acceleration

-214 N = 60.9 kg x acceleration

acceleration = -3.51 \(m/s^2\)

Therefore, the magnitude of the acceleration of the elevator is approximately 3.51 \(m/s^2\).

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