NEED HELP PLEASE 50 POINTS
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Take the "Healthy Lifestyle Questionnaire" on page 413 in your PE textbook. Share the following information. What was your score and how you feel about your score?

(Answer in 2-4 complete sentences for full credit)

Answer:

C. \(6.9\times 10^2\ \text{N}\)

Explanation:

\(\text{Supplied force}=2\times 10^2\ \text{N}\)

M = Mechanical advantage = 3.43

Mechanical advantage is given by

\(M=\dfrac{\text{Weigh of crate}}{\text{Supplied force}}\\\Rightarrow \text{Weigh of crate}=M\times \text{Supplied force}\\\Rightarrow \text{Weigh of crate}=3.43\times 2\times 10^{2}\\\Rightarrow \text{Weigh of crate}=6.86\times 10^2\ \text{N}\approx 6.9\times 10^2\ \text{N}\)

The weight of the crate is \(6.9\times 10^2\ \text{N}\).

The 0.83 Amperes of current will be produced when 100 W lamp is connected to 120 voltage source.

Current is defined as the flow of charge per unit time. It is related with power and voltage. The formula to be used for current calculation is -

P = VI, where P is power, V is voltage and I refers to current.

Keep the values in formula to find the value of current.

I = 100/120

Performing division on Right Hand Side of the equation to calculate current

I = 0.83 Amperes

Thus, the generated current will be 0.83 Amperes.

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Given

mj = 65 kg

mc = 78 kg

voj = 5.75 m/s

after collision

vfj = vfc = 0 m/s

Procedure

The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

The velocity before the collision would be 4.8m/s

Higher high water
Lower high water
Higher low water
Lower low water

In a mixed-tide system, the water levels exhibit two high tides and two low tides within a tidal cycle. The ranking of the water levels according to height is as follows:

Higher high water: This is the highest water level observed during the tidal cycle. It occurs when the gravitational forces of the Moon and the Sun align to produce a stronger tidal bulge. It typically happens around the time of a new moon or a full moon.

Lower high water: This is the second-highest water level observed during the tidal cycle. It occurs when the gravitational forces of the Moon and the Sun are not aligned, resulting in a weaker tidal bulge. It typically happens around the time of the first quarter and third quarter moon phases.

Higher low water: This is the higher of the two low water levels observed during the tidal cycle. It occurs when the gravitational forces of the Moon and the Sun produce a weaker tidal trough. It typically happens between the two high tides.

Lower low water: This is the lowest water level observed during the tidal cycle. It occurs when the gravitational forces of the Moon and the Sun are not aligned, resulting in a stronger tidal trough. It typically happens between the higher low water and the next high tide.

The ranking of water levels in a mixed-tide system, from highest to lowest, is: higher high water, lower high water, higher low water, lower low water

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Answer: Ham radio

Explanation:

Answer:

C

Explanation:

The definition of velocity and the graphical analysis allows to find the correct answer for the velocity of a body moving in the negative direction is:  

     c) A downward-sloping line segment

Kinematics studies the movement of bodies, establishes relationships between position, velocity and acceleration.

Velocity is defined as the change of position in the time interval.

      \(v= \frac{\Delta x}{\Delta t}\)  

In a graph of this expression, time is placed on the x-axis and the position on the y-axis.

In general, if the final position is greater than the initial position, the speed is positive and the slope must be upward sloping.

If the final position is less than the initial position, the velocity is negative and the slope of the graph is downward sloping, in the attachment we can be this type of graph.

Let's review the different answers:

a) False. This velocity is positive.

b) False. In this case the speed is vertical.

c) True. The final position is less than the initial position, therefore the velocity is negative.

d) False. In that case there is no change in position, therefore the velocity is zero

In conclusion, using the definition of velocity and graphical analysis we can find the correct answer for the velocity of a body moving in the negative direction is:

     c)  A downward-sloping line segment

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Answer:

15 g

Explanation:

Given,

Plutonium-244 = 30 g

We have to find the gram of Plutonium-244 left after 1 half-life.

We know that the half-life of a radioactive isotope is constant. The half-life of a Radioactive isotope does not depend on the initial amount of isotope.

Now,

After 1 half-life

Plutonium-244 left = \(\dfrac{30}{2}\)

                               = 15 g

Hence, 15 g of the Plutonium-244 will be left after 1 half-life.

Yes, mushrooms do give off CO2 (carbon dioxide) as part of their metabolic processes. Like all living organisms, mushrooms consume oxygen and release carbon dioxide as a waste product during respiration. This process occurs continuously in mushrooms, just as it does in other organisms, meaning that they will always be releasing some amount of CO2 into their environment. However, the amount of CO2 released by mushrooms is generally quite small compared to that released by larger organisms like humans or animals. Additionally, mushrooms are also capable of absorbing some of the CO2 in their environment through a process called photosynthesis, which can help to offset their own CO2 emissions to a certain extent. Overall, while mushrooms do release some amount of CO2, they are not a major source of greenhouse gas emissions compared to other sources like fossil fuels or industrial processes.

B.Warmer air molecules move faster and get farther apart. As they get farther apart, they become less dense and rise.

The spacecraft's acceleration can be found using the equation: a = (v-u)/t = 4.50 x 10^2 m / 4.0 s = 11.25 m/s^2.

Uniformly accelerating motion refers to an object that is moving at a constant rate of acceleration. This means that the velocity of the object is changing at a constant rate, but the acceleration remains the same throughout the motion. An example of this type of motion is an object that is accelerating from rest at a constant rate. The motion of the object can be described mathematically by the equations of motion, such as distance = initial velocity * time + 1/2 * acceleration * time^2. The graph of uniformly accelerating motion is a parabola, with velocity on the y-axis and time on the x-axis. This type of motion is different from non-uniform acceleration, where the acceleration changes during the motion.

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A spacecraft that is uniformly accelerating straight upward from rest reaches an altitude of 4. 50 X 102 m [up) with acceleration of 11.25 m/s².

The spacecraft's acceleration can be found using the equation:

                      a = (v-u)/t

             = 4.50 x 10² m / 4.0 s

                  = 11.25 m/s².

Uniformly accelerating motion refers to an object that is moving at a constant rate of acceleration. This means that the velocity of the object is changing at a constant rate, but the acceleration remains the same throughout the motion. An example of this type of motion is an object that is accelerating from rest at a constant rate.

The motion of the object can be described mathematically by the equations of motion, such as distance = initial velocity × time + 1/2 * acceleration × time². The graph of uniformly accelerating motion is a parabola, with velocity on the y-axis and time on the x-axis. This type of motion is different from non-uniform acceleration, where the acceleration changes during the motion.

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The applied force (P) required to achieve a speed of 10 m/s in 5 seconds, considering a coefficient of kinetic friction of 0.2, is 198 N.

To analyze the situation, we can break it down into several components;

Determine the acceleration of the crate;

Using the formula v = u + at, where v is the final velocity, u is the initial velocity (which is 0 in this case), and t is the time taken, we can solve for acceleration (a);

10 m/s = 0 + a × 5 s

a = 10 m/s / 5 s = 2 m/s²

Calculate the force of kinetic friction;

The force of kinetic friction can be calculated using the formula kinetic friction = μk × N, where μk is the coefficient of kinetic friction and N is the normal force. The normal force is equal to the weight of the crate, which can be calculated as N = m × g, where m will be the mass of the crate and g is the acceleration due to gravity (approximately 9.8 m/s²).

N = m × g = 50 kg × 9.8 m/s² = 490 N

kinetic friction = μk × N = 0.2 × 490 N = 98 N

Determine the applied force;

Since the crate is accelerating, there must be a net force acting on it. The net force is the difference between the applied force (P) and the force of kinetic friction;

Net force = P - kinetic friction

Calculate the net force;

The net force can be determined using Newton's second law, which states that the net force is equal to the mass of the object multiplied by its acceleration;

Net force = m × a = 50 kg × 2 m/s² = 100 N

Determine the applied force (P);

Substituting the values into the equation from step 3, we can solve for the applied force;

Net force = P - kinetic friction

100 N = P - 98 N

P = 100 N + 98 N = 198 N

Therefore, the applied forcerequired to achieve a speed of 10 m/s in 5 seconds, considering a coefficient of kinetic friction of 0.2, is 198 N.

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Correct answer is blue-purple.

Let's discuss it further below.

To find the wavelength most strongly reflected at the center of the outer surface when a soap bubble with a thickness of 120 nm is illuminated by white light, you should use the formula for constructive interference. Assuming the refractive index n = 1.34, follow these steps:

1. Calculate the optical path difference: The path difference is twice the thickness of the soap film multiplied by the refractive index (n). In this case, it is 2 × 120 nm × 1.34 = 321.6 nm.

2. Determine the wavelength of constructive interference: For constructive interference, the optical path difference must be equal to an integer multiple of the wavelength. Since the optical path difference is 321.6 nm, you can approximate the reflected wavelength to be around 321.6 nm.

3. Identify the color: A wavelength of approximately 321.6 nm corresponds to the blue-purple range of the visible light spectrum.

So, when a soap bubble with a thickness of 120 nm and refractive index of 1.34 is illuminated normally by white light, the wavelength most strongly reflected at the center of the outer surface is blue-purple.

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Negative reinforcement increases the likelihood of a behavior by removing an aversive stimulus, while punishment decreases the likelihood of a behavior by applying an aversive stimulus. Both techniques can influence behavior, but negative reinforcement focuses on increasing desired behaviors, while punishment aims to decrease unwanted behaviors.

In instrumental conditioning, negative reinforcement and punishment are two different consequences that can influence behavior.

Negative reinforcement involves the removal or avoidance of an unpleasant stimulus to increase the likelihood of a desired behavior. This means that when a behavior is followed by the removal of something aversive, the behavior is more likely to be repeated in the future. For example, if a student completes their homework to avoid the negative consequence of receiving a detention, negative reinforcement is at play.

Punishment, on the other hand, involves the application of an aversive stimulus to decrease the likelihood of an unwanted behavior. It aims to decrease the frequency of a behavior by making it less appealing or reinforcing.

For instance, if a student is scolded by their teacher for talking during class, this punishment is intended to discourage the student from engaging in that behavior again.



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Answer:

virtual

Explanation:

because the light rays do not meet at the image position

the other options are definitely wrong because

characteristics of a plane mirror images are that,

it is the same size as the object

it is upright

Answer:

B - Virtual

Explanation:

Answer:

Explanation:

For refraction , the formula is

sin i / sin r = μ₂ / μ₁

where light is travelling from medium 1 to 2 having refractive index of μ₁ and μ₂ . Angle of incidence in medium 1 is i and angle of refraction in medium 2 is r .

Here i = 70°, r = 37°

μ₁ = 1.8 ,μ₂ = ?

sin70 / sin 37 = μ₂ / 1.8

.939 / .602 = μ₂ / 1.8

1.56 =  μ₂ / 1.8

μ₂ = 2.81 .

The value of refraction index for the second medium will be  \(\mu_2=2.16\)

Every material has a different refractive index. The refracted index of any material shows that the light is refracted by how much angle.

So like for water its value will be different also for glass its value will be different.

Now it is given in the question that

Angle of incidence \(i=70^o\)

Refractive index of the first medium \(\mu_1=1.8\)

Angle of refraction \(r=37^o\)

Now from snells law

\(\dfrac{Sin \ i}{Sin \ r} = \dfrac{\mu_2}{\mu_1}\)

\(\dfrac{Sin70}{Sin37} = \dfrac{\mu_2}{1.8}\)

\(\mu_2= \dfrac{Sin70\times1.8}{Sin37}\)

\(\mu_2=2.16\)

Thus the value of the refraction index for the second medium will be  \(\mu_2=2.16\)

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Answer:

Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?

A. Materials that are insulators and conductors have a high

resistance to electricity.

Part B

Which sentence from "Energy Story" best supports the answer in Part A?

B. "Its resistance measures how well something conducts

electricity."

Explanation:

Answer:

B released when a nucleaus splits

The final kinetic energy of the combined objects in a completely inelastic two-body collision is the same as the kinetic energy of the less massive body before the collision.

In a completely inelastic collision, the two objects stick together after the collision and move as a single object. During the collision, some kinetic energy is lost, typically converted into other forms of energy such as heat or deformation. The final kinetic energy of the combined objects is equal to the kinetic energy of the less massive body before the collision.

The reason for this can be understood by considering the conservation of momentum in the collision. While the kinetic energy is not conserved in a completely inelastic collision, the total momentum of the system is still conserved. As the objects stick together and move as one, the total mass of the combined objects is the sum of the individual masses. Therefore, the velocity of the center of mass before the collision remains the same after the collision. Since the kinetic energy is proportional to the mass and the square of the velocity, the final kinetic energy will be determined by the less massive body before the collision.

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False. The distinctive eye of a hurricane forms at wind speeds higher than 119 km/hr (74 mph).

The given statement is false. The distinctive eye of a hurricane does not form at wind speeds of about 119 km/hr (74 mph). In fact, the eye of a hurricane typically forms at higher wind speeds. The eye of a hurricane is a calm and clear area at the centre of the storm, surrounded by intense winds and rain. It is a result of the storm's structure and dynamics.

A hurricane begins as a tropical storm, which develops over warm ocean waters with sustained wind speeds of 63 km/hr (39 mph) or higher. As the storm intensifies, the wind speeds increase, and if it reaches a sustained wind speed of 119 km/hr (74 mph) or higher, it is classified as a hurricane. The formation of the eye occurs as the hurricane strengthens and organizes.

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The complete question is:

Because the distinctive eye forms at wind speeds of about 119 km/hr (74 mph), this wind speed defines the threshold where a tropical storm has grown strong enough to be called a hurricane.TRUE/ FALSE

This question can be solved using the concept of friction energy.

The thermal energy change is b "258.4 J".

The change in thermal energy will be equal to the friction energy produced during the motion of the box.

\(Change\ In\ Thermal\ Energy = E = Friction\ Energy\\\\E = \mu fd\)

where,

μ = coefficient of kinetic friction = 0.4

f = force applied = 38 N

d = distance traveled by the box = 17 m

Therefore,

\(E = (0.4)(38\ N)(17\ m)\)

E = 258.4 J

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Answer:

There are following two activities which affect heart rate and respiratory rate.

1-Exercise

2-Hiking

Explanation:

when we are exercising or hiking our heart rate and respiratory rate affected. This is because during hiking and exercising our body may need three or four time your normal cardiac output. This is because our body consuming energy during the workout and our muscles needs more oxygen. To meet the need of energy and oxygen respiration rate become fast and heart rate also increase.

Speed, distance, and position are scalar quantities, while velocity, displacement, average velocity, and acceleration are vector quantities.

Speed refers to how fast an object is moving and is a scalar quantity, with only magnitude, without direction. Distance is a scalar quantity that refers to the amount of space between two points, also having only magnitude.

Position is a scalar quantity that refers to the location of an object in space and also has only magnitude.

Velocity, on the other hand, is a vector quantity, as it has both magnitude and direction. It is the rate of change of an object's position over time.

Displacement is another vector quantity, and it refers to the change in position of an object from its starting point.

Average velocity is a vector quantity that is the average of all velocity changes during a certain time interval.

Acceleration is also a vector quantity and refers to the rate of change of velocity. It measures how quickly the velocity of an object changes, and like velocity, it has both magnitude and direction.

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Answer:

The real answer is C : organize the data in a chart or a table.

Answer:

11. 6700L

12. 0.0000238

13. 1805

14. 3800

15. 1400

16. 0.01428

17. 0.0003585

18. 0.0415

19. 4060.0

20.0.105

Answer:

monochromator

Explanation:

Answer:

,

Explanation:

Answer:

Is

• speeding up while moving forward

Answer:

In this lab, we used a virtual spectrometer to analyze the elements present in unknown astronomical objects. We observed that Moon One had hydrogen, helium, and carbon present, while Moon Two had hydrogen, helium, lithium, sodium, carbon, and nitrogen present. Planet One had hydrogen, helium, lithium, sodium, and carbon present, while Planet Two had hydrogen, helium, lithium, sodium, carbon, and nitrogen present.

It is essential to use many types of equipment when studying space because the electromagnetic spectrum is made up of many different wavelengths and frequencies, and each one provides different information. If carbon was the most common element found in the moons and planets, oxygen would be missing, which is necessary for the carbon cycle to occur. The electromagnetic spectrum helps us find out the make-up of stars by allowing us to detect the different wavelengths and frequencies of light they emit, which can tell us the elements they are composed of.

It is useful to determine the elements that a planet or moon is made up of because it can provide insight into the planet's atmosphere, climate, and potential for life. Knowing the elements present can also help us understand the history of the planet or moon, such as how it was formed and how it has evolved over time.

Speed of the wave will be = 129 m/s

given

mass = 60 g = 0.06 kg

length = 2 m

wave speed  = v = \(\sqrt{\frac{T}{mu} }\)

T = Tension of the rope = 500 N

mu = linear mass density

mu = mass / length

     = 0.06 / 2 = 0.03 kg/m

v = \(\sqrt{\frac{500}{0.03} }\) = 129 m/s

speed of the wave will be = 129 m/s

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