I’ll give brainliest and 10 points

Answer:

velocity

Explanation:

Velocity represents the direction of an object with a specified speed

Answer:

d

Explanation:

Answer:

5.3 m/s

Explanation:

Answer:

The acceleration is 0.062 m/s^2.

Explanation:

mass = 12 kg

F = 30 N at 20° right

F' = 45 N at 50° left

Let the acceleration is a.

The net force is

F'' = F' cos 50° - F cos 20°

F'' = 45 x 0.643 - 30 x 0.94 = 28.94 - 28.2 = 0.74 N

According to the Newton's second law

0.74  = 12 x a

a = 0.062 m/s^2

Momentum = m • v

Original momentum = m • 10 m/s north

Final momentum = m • 15 m/s north

Change = m • (15 - 10) m/s north

Change = m • +5 m/s north

Change = +60 kg-m/s north

The wheels on a bicycle are 60 cm in diameter. So, the wheels' angular speed, rounded to the nearest full value, is roughly 13 rad/s. Therefore, c. 13 rad/s is the right response.

To find the angular speed of the bicycle wheels, we need to relate the linear speed of the bicycle to the angular speed of the wheels.

The linear speed v and the angular speed ω are related by the equation:

v = ω * r

where v is the linear speed, ω is the angular speed, and r is the radius of the wheel.

Given that the diameter of the wheels is 60 cm, we can calculate the radius by dividing the diameter by 2:

\(\begin{equation}r = \frac{60\text{ cm}}{2} = 30\text{ cm} = 0.3\text{ m}\)

Now we can plug in the values into the equation to find the angular speed ω:

4.0 m/s = ω * 0.3 m

Solving for ω:

\(\omega = \frac{4.0\text{ m/s}}{0.3\text{ m}}\)

ω ≈ 13.3 rad/s

Rounded to the nearest whole number, the angular speed of the wheels is approximately 13 rad/s. Therefore, the correct answer is (c) 13 rad/s.

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Answer: Smaller stars burn smoothly for billions of years.

These smaller stars become white dwarfs.

Metals in stars accelerate supernova status.

Larger stars explode as supernovae.

Supernovae leave a neutron star or black hole.

Explanation:

Blue light has a greater frequency and carries more energy than red light when compared.

Electromagnetic frequencies that can be seen by human eyes make up visible light. This spectrum excludes ultraviolet and infrared radiation. The wavelengths and frequencies that an object reflects determine the colours we see. Both waves and particles of light exist. It has wave characteristics like amplitude, period, wavelength, and frequency.

The number of times a wave completes a cycle each second is known as its frequency. Hertz, or cycles per second, is the unit of measurement (Hz).

There is more energy in the light the higher the frequency. As a result, its wavelength shrinks.

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Answer:

hola me llamo bruno y tu?

Explanation:

pero yo soy de mexico

When you place an extremely small almost point source of light at the primary focal point of a parabolic mirror, the reflected wave front will be a plane wave.

This plane wave is characterized by parallel wavefronts. The focal point of a parabolic mirror is defined as the point on the principle axis at which parallel light rays converge when they are parallel to the principle axis.

According to the principles of reflection, all light rays incident on a parabolic mirror are reflected such that they converge at the focal point. In the case of a point source of light positioned at the focal point of a parabolic mirror, all the light rays coming from that point are reflected in a parallel fashion. The wavefronts of the reflected light are thus parallel, resulting in a plane wavefront.

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At the 39.7 cm mark on the meter stick, the electric potential (relative to infinity) is -140.74 x 106 V.

Electric potential is the effort required to transport an units charge from one place to another in the presence of an electric field. Earth is typically chosen as the reference point, but any location outside the range of the applied electric charge can be used. potential electricity.

Let the negative charge be located at the left end of the meter stick and the positive charge at the right end. E = kq / x2, where k is the Coulomb constant (8.99 x 109 Nm2/C2) and q seems to be the charge at the left end of the meter stick, can be used to calculate the electric field at a location x cm from the left end of the meter stick (4.02 C).

The following equation can be applied to compute the electrical potential difference seen between left end of the meter stick & infinity:

ΔV left = -kq / d = -kq / 100 cm = -kq / 0.01 m = -8.99 x 10^9 Nm^2/C^2 * 4.02 C / 0.01 m = -359.57 x 10^6 V

Similarly, the electric potential difference between the right end of the meter stick and infinity can be calculated as:

ΔV right = kq / d = kq / 100 cm = kq / 0.01 m = 8.99 x 10^9 Nm^2/C^2 * 4.02 C / 0.01 m = 359.57 x 10^6 V

The total electric potential difference between the 39.7 cm mark and infinity can then be calculated as:

ΔV_total = ΔV_left + ΔV_right * (100 cm - 39.7 cm) / 100 cm = -359.57 x 10^6 V + 359.57 x 10^6 V * (100 cm - 39.7 cm) / 100 cm = -359.57 x 10^6 V + 218.83 x 10^6 V = -140.74 x 10^6 V

Therefore, the electric potential (V) at the 39.7 cm mark relative to infinity can be calculated as:

V = ΔV_total = -140.74 x 10^6 V

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The unit vector in the direction of the given vector is [-1, 1/2].

A unit vector in the direction of the given vector [−56/105], we need to normalize the vector by dividing each component by its magnitude.

The magnitude of the vector [−56/105] can be calculated as:

|[-56/105]| = \(\sqrt {((-56/105)^2)\) = \(\sqrt {(3136/11025)\) =\(\sqrt {(56^2 / 105^2\)) = 56/105

Normalize the vector, we divide each component by the magnitude:

[-56/105] / (56/105) = [-56/105] * (105/56) = [-1, 1/2]

a unit vector, we divide each component of the vector by its magnitude.

Dividing [-56/105] by (56/105) yields [-56/105] * (105/56) = [-1, 1/2].

A unit vector in the direction of the given vector is [-1, 1/2]. This means that the vector [-1, 1/2] has the same direction as the original vector [-56/105], but its length or magnitude is equal to 1.

Unit vectors are useful as they represent only the direction of a vector, allowing for easy comparison and calculation without concerns for the vector's scale or magnitude.

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Answer:

RAP strategy is one such paraphrasing strategy. This meta-cognitive strategy is also an acronym mnemonic, and assists students in recollecting facts, with paraphrasing and helps to improve their reading comprehension. Teaching the RAP method: The acronym, RAP stands for Read, Ask and Put.

We automatically process space time frequency by how events occur and how they interact with each other.

Space refers to the amount of physical space between objects or events. Time is the measurement of the duration of events or processes. Frequency is a measure of how often a particular event or process occurs. By understanding these three components, we can accurately process the space, time, and frequency of events.

We automatically process space, time, and frequency through our brain's ability to quickly analyze and interpret sensory information. Our perception of space, or the distance between objects, is determined by our brain's ability to analyze visual cues such as size, depth, and perspective.

Our perception of time, or the duration of events, is determined by our brain's ability to track the passage of time through internal and external cues. Our perception of frequency, or the rate at which events occur, is determined by our brain's ability to analyze the number of occurrences of an event within a given period of time. All of these processes occur automatically and unconsciously, allowing us to quickly and accurately perceive our environment.

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Answer:

21

Explanation:

v(t) = t³-3t²+12t+4 on the interval 0≤t≤3

has a derivative v'(t) = 3t²-6t+12 ... which is the acceleration of the particle.

To find the maximum acceleration, we want to plug t=3 into our acceleration equation.

v'(3) = a(3) = 3(3)²-6(3)+12 = 21

Answer:

It will be reflected to the principal focus of the concave mirror

Explanation:

This is because all rays parallel and close to the principal axis of a concave mirror get reflected to the principal focus of the mirror.

For a ray to be parallel to the mirror, it must be coming from an infinite distance.

So, using the mirror formula,

1/u + 1/v = 1/f where u = object distance from mirror, v =image distance form mirror and f =focal length of mirror.

Since u = infinite distance = ∞

1/u + 1/v = 1/f

1/∞ + 1/v = 1/f

0 + 1/v = 1/f

1/v = 1/f

v = f

So, the image is at the principal focus.

So, the ray of light parallel to the principal axis of the concave mirror is reflected to the principal focus of the concave mirror.

Answer:

they might adapt or move to a new place

Explanation:

Answer:   biogeochemical process

Explanation:

To calculate the additional distance the buoy will sink when a man stands on top, we need to consider the change in buoyancy force and the additional weight added to the system.

The buoyancy force is equal to the weight of the fluid displaced by the buoy. In this case, since the buoy is floating vertically, the buoyancy force is equal to the weight of the buoy itself.

Buoyancy force = Weight of the buoy = Mass of the buoy * Gravitational acceleration

Buoyancy force = 1200 kg * 9.8 m/s^2 = 11,760 N

When the man stands on top of the buoy, his weight is added to the system. The additional weight is:

Additional weight = Mass of the man * Gravitational acceleration

Additional weight = 80 kg * 9.8 m/s^2 = 784 N

The additional weight will increase the total weight of the system, and consequently, the buoyancy force will also increase.

The additional distance the buoy will sink can be calculated using Archimedes' principle, which states that the buoyant force is equal to the weight of the fluid displaced by the object.

Additional distance = Additional weight / (Cross-sectional area * Fluid density)

The cross-sectional area of the buoy can be calculated using the diameter:

Cross-sectional area = π * (Diameter/2)^2 = π * (0.9 m / 2)^2

Assuming the fluid density of saltwater is 1025 kg/m^3, we can substitute the values into the equation:

Additional distance = 784 N / (π * (0.9 m / 2)^2 * 1025 kg/m^3)

Calculating the additional distance will provide the specific value based on the given dimensions and assumptions.

In summary, to find the additional distance the buoy will sink when a man stands on top, we consider the change in buoyancy force due to the added weight. By using Archimedes' principle, the additional distance can be calculated by dividing the additional weight by the cross-sectional area of the buoy multiplied by the fluid density.

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Answer:

a) The tractor has not toppled over because the the center of mass is acting in between the wheels

b) The features which affect its stability are;

1) The location of the center of gravity of the tractor close to the ground

2) The increased spacing between the left and the right wheels of the tractor

Q2. a) The center of mass wheel act in the region to the right away the wheel span (space in between the wheel) which creates a clockwise effect to, topple the buses over

b) It raises the bus's center of mass higher

c) To raise the center of mass to its highest practical level

Q3. At the bottom middle location within the tractor

Explanation:

a) The tractor has not toppled over because the vertical line from the center of gravity to the ground is still in between the wheel base such that since the tractor will topple over by turning clockwise about the right tire due to its weight, the weight of the tractor is currently acting in the anticlockwise direction to the right end tire of the tractor keeping the tractor's tires in good contact with the ground

b) The features which affect its stability are;

1) The location of the center of gravity of the tractor close to the ground

2) The increased spacing between the left and the right wheels of the tractor

Q2. a) When either of the buses are tilted further, the mass of the buses is acting on the tires and in their tilted condition, the mass is acting mainly on the right tire, whereby as the vertical line from the center of mass to the ground is in between the wheel bases the mass of the buses still serve s the restoring force to keep the bus on ground by providing anticlockwise moment where clockwise lotion is required for the bus to topple over

If the buses are tilted further, the vertical line from the center of mass will cross to the other side of the right tire such that the mass now provides clockwise moment turning the buses clockwise and since there are no opposing anticlockwise moment to balance that of the now clockwise moment of the buses it will continue to turn clockwise with the result that they eventually  topple over

b) When the upper deck is full of passengers, there will be an appreciable proportion of the total mass of the bus in the upper deck such that the level of the center of mass will be raised up higher

c) Sand bags are only put upstairs because by allowing for the disproportionate distribution of load such that the majority of the load of the bus is concentrated upstairs, the center of mass will be at its maximum height allowing the bus to be tested for stability in the worst case scenario

Therefore, the sands are only put upstairs to raise the center of mass

Q3. Being that the tractor is being used on a rough ground, the safest position will be at the lowest possible location at the middle of both the front and rear wheels and the left and right tires.

Answer:

Newtons/Coulomb

Explanation:

Electric field exerts a force on an electric charge.  So its unit is force divided by charge; i.e. Newtons/Coulomb

Answer:

U^U

Explanation:

Two-dimensional vectors have two components: an x vector and a y vector. Each of these vector components is a vector in the direction of one axis. The sum of the components of vectors is the original vector. Three-dimensional vectors have a z component as well.

If an electron has a kinetic energy of 6.37 ev, then the wavelength of the electron is 9.82 nm. The wavelength of the photon is 1.956 nm.

(a) To find the wavelength of an electron using kinetic energy, we use the de Broglie equation as follows: λ = h / p

where λ = wavelength

h = Planck's constant = 6.626 x 10^-34 J s

E = kinetic energy of the electron

p = momentum of the electron = sqrt(2mE) where m = mass of the electron = 9.11 x 10^-31 kg

Given: E = 6.37 eV = 6.37 x 1.6 x 10^-19 J = 1.0192 x 10^-18 J

Using the above equations, we get: p = sqrt(2 x 9.11 x 10^-31 kg x 1.0192 x 10^-18 J) = 6.737 x 10^-20 kg m/sλ = 6.626 x 10^-34 J s / 6.737 x 10^-20 kg m/s = 9.82 nm

Therefore, the wavelength of the electron is 9.82 nm.

(b) To find the wavelength of a photon using energy, we use the equation: E = hc / λ

where E = energy of the photon

h = Planck's constant = 6.626 x 10^-34 J s

λ = wavelength

c = speed of light = 3 x 10^8 m/s

Given: E = 6.37 eV = 6.37 x 1.6 x 10^-19 J = 1.0192 x 10^-18 J

Using the above equation, we get:

λ = hc / E = 6.626 x 10^-34 J s x 3 x 10^8 m/s / 1.0192 x 10^-18 J = 1.956 nm

Therefore, the wavelength of the photon is 1.956 nm.

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Answer:

It's a strength or force

Explanation:

the quantity of motion of a moving body, measured as a product of its mass and velocity

Answer:

momentum is a quality define as the product of the mass and velocity of an object.

Answer:

first

Explanation:

Newton's Newton's first law of motion states that for every action and there's an equal and opposite reaction

Answer:

D. Third

Explanation:

Answer:

b. 220 V

Explanation:

Let resistors be R1, R2, and R3 respectively.

Given the following data;

R1 = 20 ohms

R2 = 30 ohms

R3 = 60 ohms

Current = 2 Amperes

To find the voltage;

First of all, we would determine the total effective resistance (RT).

For series circuit;

RT = R1 + R2 + R3

RT = 20 + 30 + 60

RT = 110 Ohms

Next, we find the voltage using the formula;

Voltage = current * resistance

Voltage = 2 * 110

Voltage = 220 Volts

Answer:

An animal that doesn’t eat meat is called a herbivore. An few examples would be cows, rabbits, horses, and goats.

:)

Answer:

15.49 m/s

Explanation:

We know that the stopping distance is ,

=> s = u²/2(-a)

So that ,

=> 20m = u² / 2* 6m/s²

=> u² = 240m²/s²

=> u = √240 m²/s²

=> u = 15.49 m/s

**Edits are welcomed**

your on here to lol we must be hella failing g

Answer:

x_total = 20m

Explanation:

This is an exercise in kinematics, we will look for the distance it travels during the reaction time, where there is no braking, and then the distance during the deceleration.

Distance traveled during response time

           v = x₁ / t

           x₁ = v t

let's calculate

          x₁ = 10 0.75

          x₁ = 7.5 m

Now we calculate the distance during braking, the final speed is zero (v = 0)

         v² = v₀² - 2 a x₂

         x₂ = v₀² / 2 a

let's calculate

         x₂ = 10² / (2 4)

         x₂ = 12.5m

the total stopping distance is

        x_total = x₁ + x₂

        X_total = 7.5 + 12.5

        x_total = 20m