When Marie sees the red traffic light, Marie brakes to a halt from a speed of 70 m/s in just 2 seconds. What is her deceleration?

Answer:

For an arithmetic progression:

a = 16      first term          distance fallen in 1 sec

d = 32      and L = (n - 1) d      additional distance d in following seconds

S1 = a = 16

S2 = a + 32 = 48

S3 = a + 64 = 80

S10 = 16 + 288 = 304          arithmetic sequence

S = 1/2 n (a + L) = 10 / 2 (16 + 304) total distance in 10 terms

S = 5 * 320 = 1600 ft

Physics formula:

S = V0 t + 1/2 g t^2           V0 = 0 at t = 0

S = 32 / 2 * 100 = 1600 ft

Answer:

C is the answer

Explanation:

Earth is the third planet from the sun

you are cheating on your test, I know

Answer:

C..

Explanation:

I'm not sure about answer...

Answer:

A or D i put a

Explanation:

Answer:  Its Either Mario or Tonya measured the mass of the rock incorrectly on the pan balance.

Explanation: ...

The wave speed of a transverse wave propagating along a stretched uniform string directly depends on the tension in the string and the mass per unit length of the string.

The wave speed in a uniform string is given by the equation v = sqrt(T/μ), where T is the tension in the string and μ is the mass per unit length of the string. Therefore, the wave speed is directly proportional to the square root of the tension in the string and inversely proportional to the square root of the mass per unit length of the string.

The total length of the string and the total mass of the string do not directly affect the wave speed. However, a change in these parameters can indirectly affect the tension and mass per unit length, which will in turn affect the wave speed.

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Answer:

The exploitation of high-value natural resources—oil, gas, minerals, and timber—has often been a key factor in triggering, escalating, or sustaining violent conflicts around the globe. Competition over renewable resources such as land and water is on the rise, and environmental degradation, population growth, and climate change are compounding the challenges. Governments are therefore under increasing pressure to sustainably manage natural resources and resolve conflicts around their ownership, management, allocation, and control.

The flow of electricity in a certain path is the circuit.

2269 × 10-³ m can be written in scientific notation as follows: 2.269 × 10⁰.

Scientific notation is a method of writing, or of displaying real numbers as a decimal number between 1 and 10 followed by an integer power of 10.

It is an alternative format of such a decimal number immediately followed by E and an integer.

According to this question, 2269 × 10-³ metres is to be converted to scientific notation. We do this by shifting the decimal place backwards three times to obtain the following;

2.269 × 10⁰

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Answer:

Uh I'm guessing this isn't the complete question lol.

Explanation:

But I'll give you the data of the only information you gave me. The vi (Initial Velocity) has decreased so the car has decelerated. (opposite of acceleration).

Distance (S)=10 km. convert this to metre.

Speed= 72km/hr.

Vi=0: because the car ran out of gas, therefore it has stopped moving.

Given data

*The given mass of the van is m = 402.89 kg

*The initial speed of the van is u_1 = 20.54 m/s

*The given mass of the compact car is M = 704.44 kg

*The initial speed of the compact car is u_2 = 26.62 m/s

The formula for the new speed of both the vehicles is given by the conservation of momentum as

Substitute the known values in the above expression as

Hence, the new speed of both the vehicles when they stick together is v = 24.40 m/s

Sure, here are 10 questions regarding how physical health affects social media, directed toward Gen Z, Millennials, and Gen X:

Gen Z:

1. How often do you use social media in a day? Do you feel that it has an impact on your physical health?

2. Do you find it difficult to take a break from social media and disconnect from your devices? How does this affect your sleep patterns?

3. Have you ever experienced any physical symptoms such as headaches, eye strain, or neck pain due to excessive social media use? If so, how did you manage these symptoms?

4. How do you balance your time between physical activity and social media use? Do you think you spend more time on social media than being physically active?

5. Do you think that social media contributes to the pressure to maintain a certain physical appearance? How do you deal with this pressure?

Millennials:

1. How has your physical health been impacted by the use of social media? Do you feel that you spend too much time on your devices?

2. Have you ever felt overwhelmed or stressed due to the constant barrage of social media notifications and updates? How did you deal with these feelings?

3. Do you think that social media can contribute to a sedentary lifestyle? How do you combat this potential issue?

4. Have you ever experienced any physical symptoms such as carpal tunnel or back pain due to excessive social media use? How did you manage these symptoms?

5. How do you maintain a healthy balance between social media use and physical activity? Do you think you need to make changes to this balance?

Gen X:

1. How has social media affected your physical health? Have you noticed any changes in your physical activity levels or sleep patterns due to social media use?

2. Have you ever experienced any physical symptoms such as eye strain, headaches, or neck pain due to excessive social media use? How did you manage these symptoms?

3. Do you think that social media contributes to a sedentary lifestyle? How do you combat this potential issue?

4. How do you balance your time between social media use and physical activity? Do you feel that you need to make changes to this balance?

5. Do you feel that social media contributes to the pressure to maintain a certain physical appearance? How do you deal with this pressure?

The French train in a sample problem is traveling 301 km/h. When it is 360m from a road crossing, the engineer blows the whistle. If the speed of sound is 330 m/s, how many seconds after the whistle is heard at the crossing will the train cross there 0.57 sec

The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

Total velocity of the sound coming towards 631 m/sec. Time taken to reach is 360/631 = 0.57 sec

The French train in a sample problem is traveling 301 km/h. When it is 360m from a road crossing, the engineer blows the whistle. If the speed of sound is 330 m/s, how many seconds after the whistle is heard at the crossing will the train cross there 0.57 sec

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The current is 3.33A, the resistance is 36.03 Ohm, and the peak voltage is 169.68V.

Given information:

The power rating of the resistive element (P) = 400 W

Voltage supplied by the outlet (V) = 120 VAC (RMS)

a) To find the current flowing through the element, the formula:

Power (P) = Voltage (V) × Current (I)

Current (I) = Power (P) / Voltage (V)

Substituting the given values:

Current (I) = 400 W / 120 VAC

= 3.33 A

b) To find the resistance of the element, Ohm's Law can be used :

Resistance (R) = Voltage (V) / Current (I)

Resistance (R) = 120 VAC / 3.33A

= 36.03 Ohm

c) To find the peak voltage, it is required to convert the RMS voltage to peak voltage. For an AC voltage, the relationship between RMS voltage (\(V_{rms\)) and peak voltage (\(V_{peak\)) is given by:

\(V_{peak} = V_{rms} \times \sqrt2\)

Substituting the given RMS voltage:

Peak voltage  = \(120 \times \sqrt2\)

= 169.68 V

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From the calculation, there is a net force that acts on the car and then the acceleration that is produced by the net force is 0.296 m/s^2.

The term net force refers to the force that is acting on an object that makes it to move. We have to recall that the force of friction is the force the limits the motion of an object. In other words, it is the force of friction that makes a body not to be able to move and this must be overcome by the forward force when it is greater than the friction force.

Now;

Mass of the car = 1352 kg

Forward force = 7820 N

Coefficient of friction = 0.56

Frictional force = μmg

= 0.56 * 1352 kg * 9.8 m/s^2

= 7419.8 N

Net force = Forward force - Frictional force

= 7820 N -  7419.8 N

= 400.2 N

Then;

Net force = ma

m = mass

a = acceleration

a = Net force/m

a = 400.2 N/ 1352 kg

a = 0.296 m/s^2

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Answer: Newton's third law of motion is naturally applied to collisions between two objects. In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction.

Explanation: So it is #2

The rotational kinetic energy of the object having a moment of inertia of 21 kg.m² and angular speed of 122 radians/s is 156,282 Joules.

To find the rotational kinetic energy of an object, you can use the following formula:

Rotational Kinetic Energy (K) = 0.5 × Moment of Inertia (I) × Angular Speed² (ω²)

In this case, the moment of inertia (I) is 21 kg·m² and the angular speed (ω) is 122 radians/s. Plugging these values into the formula, we get:

K = 0.5 × 21 kg·m² × (122 radians/s)²

Now, let's calculate the rotational kinetic energy:

K = 0.5 × 21 kg·m² × 14884 (radians/s)²
K = 10.5 kg·m² × 14884 (radians/s)²
K = 156,282 kg·m²/s²

Therefore, the rotational kinetic energy of the object is 156,282 Joules.

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The terminal speed of the rod is approximately 0.346 m/s, given mass m=3.6 grams, length l=18 cm, resistance R=0.0013 Ω, and magnetic field B=0.060 T.

To find the terminal speed of the rod, we'll use the equation v_terminal = (mgR) / (Bl^2), where m is the mass, g is the gravitational acceleration, R is the resistance, B is the magnetic field, and l is the length of the rod.
1. Convert mass to kg and length to meters: m = 0.0036 kg and l = 0.18 m.
2. Calculate the force due to gravity: F_gravity = mg = 0.0036 kg * 9.81 m/s² = 0.0353 N.
3. Calculate the denominator: (Bl^2) = (0.060 T) * (0.18 m)² = 0.001944 Tm².
4. Calculate terminal speed: v_terminal = (mgR) / (Bl^2) = (0.0353 N * 0.0013 Ω) / 0.001944 Tm² ≈ 0.346 m/s.

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Passive solar heating utilizes design and natural processes to capture and distribute solar energy without mechanical devices, while active solar heating uses mechanical systems to collect and distribute solar heat, requiring external energy inputs.

Passive solar heating and active solar heating are two different approaches to utilizing solar energy for heating purposes. Here's a brief explanation of each:

1. Passive Solar Heating:

Passive solar heating refers to the design and use of building materials to capture, store, and distribute solar energy without the use of mechanical or electrical devices. It relies on natural processes and elements to maximize solar gain and heat transfer. Some common passive solar heating techniques include:

Passive solar heating systems do not require active mechanical components like pumps or fans and are generally considered more energy-efficient and cost-effective.

2. Active Solar Heating:

Active solar heating involves the use of mechanical and electrical devices to collect, store, and distribute solar energy for heating purposes. It typically utilizes solar collectors, such as solar panels or solar thermal systems, to capture sunlight and convert it into heat energy. The collected heat is then transferred to a heat storage system or directly used to provide space heating or water heating. Active solar heating systems may involve pumps, fans, and controls to circulate the heated fluid or air throughout the building.

Active solar heating systems require external energy inputs, such as electricity for powering pumps or fans, and often involve more complex installation and maintenance compared to passive solar heating. However, they can offer greater control and efficiency in heating applications, especially in larger or more demanding spaces.

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Answer:

The oxygen goes to the respiratory system and goes to the cells of the body. The food has glucose and that goes into the heart and blood vessels. Some of the glucose goes to the cells of the body.

Explanation:

The glucose contained in the food that enters the body enters the blood and heart through the blood vessels while the oxygen from air enters the body cells through the respiratory system.

Although there is a missing image a general answer is provided within the concept of your question

       A healthy simulation body represents a real healthy human body, therefore when food is consumed the food is broken down in the digestive system.  and

The glucose from the food will be absorbed into the blood stream of the individual, while the oxygen breathed in by the body will be absorbed into the body cells of the human.    

Also some glucose from the consumed food will also be absorbed into the body cells to provide the necessary energy required by the body.

Hence we can conclude that The glucose contained in the food that enters the body enters the blood and heart through the blood vessels while the oxygen from air enters the body cells through the respiratory system.

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The correct answer is A. an increase in Earth's average surface temperature.

While all of these are aspects of global warming, option A best summarizes it.

Galaxy #2 belongs to  spiral. This is because it has a bulge at the centre, a disk as well as the curved arms. Contains both Young and Old stars - contains gas and dust - contains more red giants and red supergiant's than disk - some regular rotation about centre.

Dark matter is a form of matter thought to account for approximately 85% of the matter in the world. Dark matter consists of particles that do not absorb, reflect or emit light, so they cannot be detected by observing electromagnetic radiation. Dark matter is material that cannot be directly seen. We know  dark matter exists because  it affects objects  we can directly observe.

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Answer:

3N

Explanation:

From the analysis, it can be concluded that planet A has the strongest gravitational field, followed by planet C, and planets B and D have the same gravitational field strength.

The gravitational force acting on various masses is measured on different planets. The table shows the measured values for the forces acting on the corresponding masses:Planet Force (N) Mass (kg)A 8.0 0.50B 30 3.0C 45 3.0D 60 6.0

Method for comparing the gravitational field strengths on the different planets:First, we can use the formula for calculating gravitational force: \(`F = G (m_1m_2 / r^2)`\)where G is the universal gravitational constant `\(6.67 * 10^{-11 }Nm^2/kg^2\), m1 and m2 are the masses of the two objects in kg, and r is the distance between the centers of the objects in meters.

We know that the force is proportional to mass (F = ma). So we can calculate the acceleration due to gravity (g) on each planet by dividing the force by the mass. Therefore, we can use the formula: `g = F / m`.

Comparing the gravitational field strengths on the different planets:We will calculate the acceleration due to gravity (g) on each planet.

For planet A: `

g = F / m

= 8.0 N / 0.50 kg

= 16 \(m/s^2\)`

For planet B: `g = F / m

= 30 N / 3.0 kg

= 10 \(m/s^2\)

For planet C: `g = F / m

= 45 N / 3.0 kg

= 15 \(m/s^2\)

For planet D: `g = F / m

= 60 N / 6.0 kg

= 10 \(m/s^2\)

`So we see that planet A has the strongest gravitational field, followed by planet C, then planet B and planet D have the same gravitational field strength.

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Explanation:

3 atoms are in the compound

Answer:

the reaserch I have says that thermal pollution

(1) The moment of 20N about the wheel is 30 Nm. (2) The distance of the wheel to the center of mass of the wheelbarrow is 1.2m.

1. The moment of 20N about the wheel can be calculated using the formula:

Moment = Force x Distance

Moment = 20N x 1.5m

Moment = 30 Nm

2. To find the distance of the wheel to the center of mass of the wheelbarrow, we can use the principle of moments, which states that the sum of the clockwise moments about a point is equal to the sum of the anticlockwise moments about the same point. Let the distance from the wheel to the center of mass be x.

Clockwise moment = Weight x Distance

Clockwise moment = 80N x (1.5m - x)

Anticlockwise moment = Upforce x Distance

Anticlockwise moment = 20N x x

Using the principle of moments:

80N x (1.5m - x) = 20N x x

Simplifying and solving for x:

120m = 100x

x = 1.2m

Therefore, the distance of the wheel to the center of mass of the wheelbarrow is 1.2m.

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Answer:

The fireworks give off heat.

Explanation:

The resultant momentum of the object is 13 meters per second.

A moving body's amount of motion is referred to as momentum. In general, it is more difficult to stop a moving object the more momentum it has. For this reason, the term is frequently used in a metaphorical sense, as in the sports team example.

It indicates that the team is having success (usually a winning streak) and is growing as a result. The other teams will find it more difficult to prevent the team from picking up steam.

Given that an object has an x–the momentum of 8.5 kilograms meters/second and a y–the momentum of 9.8 kilograms ·meters/second.

The resultant momentum will be calculated as:-

R = √ ( 9.8² + 8.5²)

R = √168.29

R = 13 meters per second

Therefore, the resultant momentum of the object will be 13 meters per second.

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The fact that Earth's interior is differentiated suggests that the planet has undergone a process of separation and segregation of different materials during its formation.

This process of differentiation occurred due to the intense heat and pressure that existed in the early Earth, which caused the denser materials to sink towards the center while the lighter materials rose towards the surface.

The Earth's interior is made up of several distinct layers: the solid inner core, the liquid outer core, the mantle, and the crust. Each layer has a different composition and physical properties that result from the differentiation process. For example, the core is mainly composed of iron and nickel, while the mantle is composed of silicate minerals.

The differentiation of Earth's interior has important implications for the planet's geological and biological history. The distribution of different elements and minerals in the layers of the Earth affects the planet's magnetic field, plate tectonics, and the formation of resources such as minerals and fuels.

It also plays a crucial role in the development of life on Earth, as the conditions within the mantle and core are believed to have influenced the evolution of the planet's atmosphere and the emergence of life.

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Answer:

Current =voltage /resistance.

1. The spring is storing

1/2 (240 N/m) (0.40 m)² = 19.2 J ≈ 19 J

of potential energy.

2. When the spring is compressed by 0.30 m, it is storing

1/2 (240 N/m) (0.30 m)² = 10.8 J

so there was a loss of 19.2 J - 10.8 J = 8.4 J.

3. The spring is storing

1/2 (150 N/m) (0.80 m)² = 48 J

of potential energy.

4. Stretching the spring by 0.20 m more has it storing

1/2 (150 N/m) (1.0 m)² = 75 J

so that the extra weight adds 75 J - 48 J = 27 J of energy.