what does 1N equal? It happens to be one of the questions on my "Newton's Laws of Motion Exercises" paper. ​

(a) Yes, our velocity changes because the direction is changing. (b) No, we do not accelerate.

(a) Velocity is a vector quantity that includes both magnitude (speed) and direction. When we round a curve and drive east, the direction of our motion changes.

Therefore, even if our speed remains constant, the velocity vector changes because it now points in the eastward direction instead of the previous direction.

(b) When the magnitude of the direction of the velocity is changed, we say that acceleration has occurred. In this scenario, although the direction of your velocity changes, your speed remains constant.

Since the rate at which velocity changes determines acceleration, there cannot be acceleration without a change in velocity.

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The total work done on the crate of bananas is 4800 J (the work done to move it horizontally).

Work done is defined as the product of displacement and force, w = FS.

Here,

There are two parts to the work done on the crate of bananas: the work done to move it horizontally and the work done to lift it vertically.

First, let's calculate the work done to move the crate horizontally. The formula for work is,

Work = Force x Distance x cos(Ф)

where theta is the angle between the force and the displacement. In this case, the force is the tension in the rope, and it is pulling horizontally. So, theta is 0 degrees, and cos(Ф) is 1.

The distance the crate is moved horizontally is 5 meters, and the force applied by the motor is,

Force = Power / Velocity = 40 W / (5 m / 120 s) = 960 N

So, the work done to move the crate horizontally is:

Work = 960 N x 5 m x cos(0) = 4800 J

The distance the crate is lifted vertically is not given in the problem, so we cannot calculate the work done to lift the crate without this information.

Therefore, the total work done on the crate of bananas is 4800 J (the work done to move it horizontally).

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The gymnastic tumbler has a total kinetic energy of 0.9375 J, and 38.46% of that total kinetic energy is due to rotational motion.

What is kinetic energy?

Kinetic energy is the energy possessed by an object due to its motion. It is defined as the work required to accelerate an object of a certain mass from rest to its current velocity.

Given:

Mass of the tumbler (m) = 75 kg

Diameter of the tumbler (d) = 1.0 m

Angular velocity (ω) = 0.50 rev/s

The radius (r) of the tumbler is half of its diameter, so r = d/2 = 0.5 m.

Linear velocity (v) = ω * r

v = (0.50 rev/s) * (0.5 m)

v = 0.25 m/s

a) Total kinetic energy (K_total) of the tumbler consists of both translational and rotational kinetic energy. The translational kinetic energy (K_trans) can be calculated using the formula:

K_trans = (1/2) * m * v^2

K_trans = (1/2) * (75 kg) * (0.25 m/s)^2

K_trans = 0.9375 J

b) The rotational kinetic energy (K_rot) can be calculated using the formula:

K_rot = (1/2) * I * ω^2

I = (1/2) * m * r^2

I = (1/2) * (75 kg) * (0.5 m)^2

I = 4.6875 kg·m²

K_rot = (1/2) * (4.6875 kg·m²) * (0.50 rev/s)^2

K_rot = 0.5859 J

Percentage of rotational kinetic energy = (K_rot / K_total) * 100

Percentage of rotational kinetic energy = (0.5859 J / (0.9375 J + 0.5859 J)) * 100

Percentage of rotational kinetic energy ≈ 38.46%

Therefore, the gymnastic tumbler has a total kinetic energy of approximately 0.9375 J, and approximately 38.46% of that total kinetic energy is due to rotational motion.

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Answer:

(a) 1320 W

(b) 480 W

(c) E':E ≈ 11:2

Explanation:

(a) Applying,

P' = VI'................. Equation 1

Where P' = Power of the blow-dryer, V = Voltage, I = current rating of the blow-dryer.

From the question,

Given: V = 120 V, I' = 11 A

Substitute these values into equation 1

P = (120×11)

P = 1320 W

(b) Similarly,

P = VI................... Equation 2

Where P = Power of the vacuum cleaner. I = current rating of the vacuum cleaner.

Also Given: I = 4 A,

Therefore

P = 4(120)

P = 480 W

(c)

E' = P'/t'............. Equation 3

E = P/t................ Equation 4

Where E' = Energy of the blow-dryer, t' = time of use of the blow-dryer, E = Energy of the vacuum cleaner, t = time of use of the vacuum cleaner

From the question,

Given: t' = 15 minutes = (15×60) = 900 seconds, t = 30 minutes = (30×60) = 1800 seconds

Substitute these values into equation 3 and 4

E' = 1320/900

E' = 1.47 J,

E = 480/1800

E = 0.267

Therefore,

E':E = 1.47:0.267

E':E ≈ 11:2

Answer:

Explanation:

Specific heat capacity of a body is expressed as H = mcΔt

H = heat energy released by the body

m = mass of the body

c = specific heat capacity of the body

Δt  = change in temperature of the body

Given H = 2000J, m = 0.5 kg, c = 4,186 J/kg° C.

Δt = H/mc

On substituting the given value;

Δt  = 2000/4,186*0.5

Δt   = 2000/2093

Δt = 0.96°C

The temperature difference between when the blood arrives at the body surface and returns back to the Interior of the body is 0.96°C

The sound intensity level would increase by 20 decibels if 100 people shout instead of one. Hence option B is correct.

The sound intensity level (SIL) increases by 10*log(N), where N is the number of people shouting. With the help of this equation, we can determine the rise in SIL as follows: N₁ = 1 (one person shouting) and N₂ = 100 (100 people shouting) simultaneously,

ΔSIL = 10log(N₂/N₁)

ΔSIL = 10log(100/1)

ΔSIL = 10*2

ΔSIL = 20 dB

Therefore, the answer is B that says "The sound is 20 decibels higher".

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Answer:

714.285s

Explanation:

use relative velocity

8-4.5 = 3.5m/s

x = 2500m

2500/3.5 = 714.285s = 700s (with sig figs)

As the plates separate from one another, the transform boundary is described. Assume that two crusts are present and that they exactly line up from east to west. A plate drifts north, away from another plate.

The transform fault, a third type of plate boundary, allows plates to slide past one another without creating or destroying crust. Rocks facing each other on two sides of the fault are typically of different type and age because they are cut and displaced by movement in the opposite direction.

Two plates collide at the transform plate boundary when they slide past one another horizontally. The San Andreas Fault, which causes a large number of earthquakes in California, is a well-known transform plate boundary.

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Answer:

Alveoli

The bronchioles end in tiny air sacs called alveoli, where oxygen is transferred from the inhaled air to the blood.

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the package will travel a horizontal distance of 1500 m/sec x 10.1 sec = 15,150 meters before hitting the ground. Assuming there is no air resistance, the package will travel horizontally at the same speed as the airplane, which is 1500 m/sec. The time it takes for the package to hit the ground can be calculated using the formula t = √(2h/g), where h is the initial height (500 m) and g is the acceleration due to gravity (9.8 m/s²). t = √(2(500)/9.8) = √102.04 ≈ 10.1 sec


To determine how far the package travels horizontally before hitting the ground, we need to find the time it takes for the package to fall 500 meters vertically and then use that time to calculate the horizontal distance traveled.
Step 1: Find the time it takes for the package to fall.
We'll use the free fall equation: h = 0.5 * g * t^2, where h is the height, g is the acceleration due to gravity (approximately 9.8 m/s^2), and t is the time.
500 = 0.5 * 9.8 * t^2
Solve for t:
t^2 = (500 * 2) / 9.8
t^2 ≈ 102.04
t ≈ √102.04
t ≈ 10.1 seconds
Step 2: Calculate the horizontal distance traveled.
Since the airplane is flying horizontally at 1500 m/s, we can multiply its speed by the time it takes for the package to fall:
Horizontal distance = speed * time
Horizontal distance = 1500 m/s * 10.1 s
Horizontal distance ≈ 15,150 meters
The package travels approximately 15,150 meters horizontally before hitting the ground.

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Answer:

300,000,000

Explanation:

Use the speed formula

Speed= wavelength x frequency

In Star Wars, John Williams used the Leitmotif concept of romantic opera in which a character is assigned a short melody.

It is used for famous characters like Darth Vader, Princess Leia, and Han Solo all have their melody.

Leitmotif is generally described as a recurring theme shown or appears over musical or literary composition.

Leitmotif is more common in operas and symphonic poems. It is attributed to a specific person, idea, or situation.

Hence, in this case, it is concluded that in the movie Star Wars, John Williams used the Leitmotif concept of romantic opera.

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The speed of the second bowling ball after collision is 1.55 m/s

Speed can be defined as the ratio of distance to time of a body.

To calculate the speed of the second bowling ball after collision, we use the formula below

Formula:

v = mu/m'................ Equation 1

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the second bowling ball is 1.55 m/s fast.

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The final speeds of the spheres are 3.47 m/s and 3.08 m/s.

We can use conservation of momentum to solve this problem since there are no external forces acting on the system.

The initial momentum of the system is:

p_initial = m₁ * v₁ + m₂ * v₂

where m₁ and m₂ are the masses of the spheres, and v₁ and v₂ are their initial velocities (4.00 m/s and 0 m/s, respectively).

After the collision, the momentum of the system is:

p_final = m₁ * v1' + m₂ * v₂'

where v₁' and v₂' are the final velocities of the spheres. We also know that the angle between the first sphere's final path and its initial path is 60 degrees, which means that the angle between the two spheres after the collision is 150 degrees (90 + 60).

Using conservation of momentum, we can set the initial and final momenta equal to each other:

m₁ * v₁ + m₂ * v₂ = m₁ * v₁' + m₂ * v₂'

We can also break down the final velocities into their x and y components using trigonometry. Let's define the angle between the first sphere's final path and the x-axis as theta. Now we can use conservation of momentum to solve for the final velocities:

m₁ * v₁ + m₂ * v₂ = m₁ * v₁' * cos(theta) + m₂ * v₂' * cos(150 degrees)

0 = m₁ * v₁' * sin(theta) + m₂ * v₂' * sin(150 degrees)

Solving the first equation for v₂', we get:

v₂' = (m₁ * v₁ + m₂ * v₂ - m₁ * v₁' * cos(theta)) / (m₂ * cos(150 degrees))

Substituting this expression into the second equation and solving for v₁', we get:

v₁' = (m₂ * sin(150 degrees) * v₁ + m₂ * sin(150 degrees) * v₂ + m₁ * sin(theta) * v₁' - m₁ * sin(theta) * m₂ * v₁ * cos(theta) / cos(150 degrees)) / (m₁ * sin(theta))

Plugging in the given values and solving, we get:

v₁' = 3.47 m/s

v₂' = 3.08 m/s

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The air pressure was increased and then the can had to burst.

There is a direct relationship between temperature and air pressure, known as the "ideal gas law." According to this law, the pressure of a gas is directly proportional to its temperature when the volume and the number of particles of the gas are constant.

Specifically, the ideal gas law states that PV = nRT, where P is the pressure of the gas, V is its volume, n is the number of particles of the gas, R is the gas constant, and T is the temperature of the gas measured in Kelvin.

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Answer:   By squeezing the balloon, you reduce the space the gas particles can occupy. As the particles are pushed a bit closer together, they collide with more, so the pressure from the moving gas particles increases. If the volume increases, its pressure decreases.

It is the same everywhere between the plates if any edge effect is ignored statements is true concerning the strength of the electric field between two oppositely charged parallel plates. The correct answer is Option A.

When two oppositely charged parallel plates are connected to a power source, an electric field is established between them. The electric field represents the force experienced by a positive test charge placed in the field. The correct answer is Option A.

In this case, the electric field between the plates is uniform, meaning it has the same magnitude and direction at all points between the plates. This is true if we ignore any edge effects, which can occur near the edges of the plates. If the plates are infinitely large, the electric field will be constant everywhere between them. However, in real-world situations with finite-sized plates, edge effects can cause the electric field to deviate slightly near the edges.

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We can expect the maximum electron kinetic energy to be higher when illuminated by light with a wavelength of 250 nm compared to 350 nm.

The phenomenon of light causing the emission of electrons from a metal surface is known as the photoelectric effect. The energy of the incident photons determines the maximum kinetic energy of the emitted electrons.

In this case, when the metal surface was illuminated by light with a wavelength of 350 nm, the maximum kinetic energy of the emitted electrons was found to be 1.90 eV. Now, if the same metal is illuminated by light with a shorter wavelength of 250 nm, the energy of the incident photons would increase.

This would result in a higher maximum kinetic energy of the emitted electrons, as per the photoelectric effect. Therefore, we can expect the maximum electron kinetic energy to be higher when illuminated by light with a wavelength of 250 nm compared to 350 nm.

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Answer:

many for a hour. I don't know how much I did this week

Explanation:

My goal was to do jogging every morning for around one hour for starters. I felt release of endorphins and I gained lots of positive energy. Organizations tell that it's good to do exercise for 60 minutes and take 1200 steps at least.

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Explanation:

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According to the question we have These t-values are the confidence coefficients for each of the scenarios given.

To find the confidence coefficients using the t-table, you need to first determine the degrees of freedom (df) and the corresponding t-value for each given confidence level.

1. n = 12 with 95% confidence:
Degrees of freedom (df) = n - 1 = 12 - 1 = 11
For a 95% confidence level, the t-value from the t-table is approximately 2.201.

2. n = 15 with 95% confidence:
Degrees of freedom (df) = n - 1 = 15 - 1 = 14
For a 95% confidence level, the t-value from the t-table is approximately 2.145.

3. n = 21 with 96% confidence:
Degrees of freedom (df) = n - 1 = 21 - 1 = 20
For a 96% confidence level, the t-value from the t-table is approximately 2.528.

4. n = 27 with 92% confidence:
Degrees of freedom (df) = n - 1 = 27 - 1 = 26
For a 92% confidence level, the t-value from the t-table is approximately 2.056.

These t-values are the confidence coefficients for each of the scenarios given.

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Answer: A

Explanation:

The more current flows through a bulb, the brighter the bulb and vice versa. Resistance and current are inversely proportional to each other. Since 100W lamp is brighter, more current flows through it, thus meaning that its resistance is lower than that of the 25W lamp.

The electrical resistance of the 100-W lamp is Less. The correct option is A.

The electrical resistance of a lamp is determined by its physical properties such as the length and cross-sectional area of its filament. A 100-W lamp glows brighter than a 25-W lamp because it is designed to dissipate more power as light energy, indicating that the 100-W lamp has a lower resistance than the 25-W lamp.

This is because, according to Ohm's Law, the power dissipated by a resistive element is equal to the square of the current passing through it multiplied by its resistance. If the power is increased, the current passing through the lamp will also increase, and in order to maintain the same voltage across the lamp, the resistance must decrease. Therefore, the electrical resistance of the 100-W lamp is less than that of the 25-W lamp.

Therefore the correct option is A.

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By the definition of wavelength, the answer is the letter D, the wavelength would decrease.

We can see in the diagram a wave motion.

A wave has some characteristics:

Now, if we increase the distance of the crests, by the definition shown above, we will increase the wavelength.

Therefore, the answer is letter D, the wavelength would increase.

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Answer:

sorry, there is no picture, try re-uploading it with the pic

Explanation:

Answer:

From liquid to solid or to solid or liquid the transition has to cross the grey zone.

Explanation:

hope it helps<

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Miniature circuit breakers is called the developed form of fuse because MCBs are more sensitive to current than fuses. They immediately detect any abnormality and switch off the electrical circuit automatically. This prevents any permanent damage to electrical appliances and human beings

The magnitude of the ball's change in velocity is 2 m/s. The direction of the change in velocity is downwards.

In physics, magnitude is a measure of the size or intensity of a physical quantity, such as length, mass, temperature, pressure, or energy. Magnitude is often expressed as a numerical value, and is usually related to the physical property being measured. For example, the magnitude of a length measurement is the length itself, while the magnitude of a temperature measurement is the temperature reading. Magnitude is also used to describe the size of a star or other astronomical object, such as a planet. It is typically expressed as a number on a logarithmic scale, where a lower number indicates a brighter object and a higher number indicates a dimmer object.

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The best way to determine that star 2 is the hottest is by comparing the intensity values of the stars. A higher intensity indicates a hotter star. The other two options mentioned do not provide a reliable method for determining the hottest star.

Based on the information provided, the best way to determine that star 2 is the hottest is due to the fact that its intensity is generally higher than the intensity values for the other two stars. This is because the intensity of a star's light is directly related to its temperature. A hotter star emits more energy and therefore has a higher intensity.

In contrast, option b is not a valid way to determine the hottest star. While it is true that all three stars may share some types of atoms and have absorption lines occurring at the same wavelengths, this does not necessarily indicate which star is the hottest. The presence of similar atoms and absorption lines is not a definitive indicator of temperature.

Option c is also not an accurate way to determine the hottest star. The absorption lines in a star's spectrum come from cooler atoms in the outer layers of the star. These atoms use the star's light to de-excite their electrons to lower energy levels. However, this does not provide direct information about the star's temperature.

In conclusion, the best way to determine that star 2 is the hottest is by comparing the intensity values of the stars. A higher intensity indicates a hotter star. The other two options mentioned do not provide a reliable method for determining the hottest star.

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