Explain two scenarios where a large truck can have the same momentum as a small car.

1 ) The cheetah catches its prey after 277 m

2 ) The minimum distance the gazelle must be ahead of the cheetah to have a chance of escape is 31.5 m

Let the velocity of cheetah be Vc and that of gazelle be Vg.

Vc = 95.2 km / h

Vg = 79.9 km / h

Since they both travel for same amount of time,

Tc = Tg

dc / Vc = dc / Vg

( 0.0531 + x ) / 95.2 = x / 79.9

95.2 x = 4.24 + 79.9 x

15.3 x = 4.24

x = 0.277 km

x = 277 m

Distance travelled by cheetah in 7.5 seconds = 26.4 m / s * 7.5 s

Distance travelled by cheetah in 7.5 seconds = 198 m

Distance travelled by gazelle in 7.5 seconds = 22.2 m / s * 7.5 s

Distance travelled by gazelle in 7.5 seconds = 166.5 m

Distance that the gazelle need be ahead of cheetah to escape = 198 - 166.5 = 31.5 m

Therefore,

1 ) The cheetah catches its prey after 277 m

2 ) The minimum distance the gazelle must be ahead of the cheetah to have a chance of escape is 31.5 m

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Answer:

3.6 N

Explanation:

The magnitude of centripetal force in this case is equal to the magnitude of tension in the spring.

The formula is :

T= mv²/r ------where T is tension

m= mass of object =0.8 kg

v= velocity of object {tangential velocity} = 3.0 m/s

r= length of string = 2m

Applying the formula with real values;

T= mv²/r

T= {0.8 * 3²} / 2

T= { 7.2}/2 = 3.6 N

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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The angular speed of the horse that which is 7 m from the cenetr of a merry go round is 252 m/s.

Angular speed is the rate at which an object changes it angles which we measure in radians in a given time.

To calculate the angular speed of the horse, we use the formula below.

Formula:

Where:

Substitute these values into equation 1

Hence, the angular speed of the horse is 252 m/s.

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The circle of the family tree symbol represents a female individual. Individuals are the main component of a family tree chart.

A pedigree chart is a graph showing the prevalence and incidence of a particular gene or organism and its ancestors from one generation to the next (most commonly humans, show dogs, and horses race). The Family Tree presents family information in an easy-to-read chart. We could simply call it a "family tree". The genealogy uses a standardized set of symbols, with squares representing males and circles representing females. Building the family tree is the story of the family, and as memories fade, details about previous generations can become uncertain.

Diamonds are used if the gender of the person is unknown. Individuals with associated phenotypes are indicated by solid (dark) symbols. Heterozygotes, when identifiable, are indicated by shaded dots in symbols or half-filled symbols.

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Answer: decantation and screening

Explanation:

Answer:

it is A

Explanation:

the person above me helped

The force on Object A = 1116.07 N

The separation between the two charges, d = 1.68 cm

d = 1.68/100 m

d = 0.0168 m

The charge on object A

The charge on object B

The electric constant

The force on on the charge A is calculated as shown below:

The force on Object A = 1116.07 N

1. there are roughly 3 × 10^12 more electrons than protons in object A before the two objects come in contact.

2.  there are roughly 4 × 10^12 more protons than electrons in object B before the two objects come in contact.

3.  the net charge on object A after touching is -4.81 × 10^-7 C, and the net charge on object B is +4.81 × 10^-7 C.

The electron is described as a subatomic particle with a negative one elementary electric charge.

We divide the charge by the charge of one electron to get the number of  electrons are there than protons in object A before the two objects come in contact:

excess electrons = charge on object A / charge of one electron

= -4.81 × 10^-7 C / -1.602 × 10^-19 C

≈ 3 × 10^12 electrons

2.

we divide the charge by the charge of one proton to get protons that are there than electrons in object B before the two objects come in contact:

excess protons = charge on object B / charge of one proton

= 6.41 × 10^-7 C / 1.602 × 10^-19 C

≈ 4 × 10^12 protons

3.

charge on object A + charge on object B = 0

-4.81 × 10^-7 C + charge on object B = 0

charge on object B = 4.81 × 10^-7 C

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Answer:

you have to match the letters in the picture to the list of energy types

When light travels in a certain medium and falls on the surface of another medium a part of it turns back in the same medium This phenomenon is called Reflection.

A wavefront may alter its course at an interface between two different media and return to the first medium, a phenomenon known as reflection. Common examples are the reflection of light, sound, and water waves.

Reflection of light refers to the occurrence where light strikes an item and bounces back off its surface. Examples: using a flat mirror to reflect. by a spherical mirror's reflection. There are essentially two types of reflection that apply to light. While diffuse reflection is caused by rough surfaces that tend to reflect light in all directions, specular reflection is described as light reflected off a smooth surface at a specific angle.

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Answer:

A force is a push or pull upon an object resulting from the object's interaction with another object.

Systems always have inputs and outputs.

Explanation:

(a) T₂ = Tₒ + (2ρₒ - ρₒ) / (αρₒ), (b) Substitute values to find T₂ in °C, (c) Use R = ρ(T) * (L / A) to find resistance R at 2Tₒ.

Part (a) To find the temperature T₂ at which the resistance of the wire will be twice as high as at Tₒ, we can set up the equation:

2ρₒ(1 + α(T₂ - Tₒ)) = ρₒ(1 + α(T - Tₒ))

By simplifying and cancelling ρₒ on both sides, we get:

2(1 + α(T₂ - Tₒ)) = 1 + α(T - Tₒ)

Expanding and rearranging the equation, we have:

2αT₂ - 2αTₒ + 2 = αT - αTₒ

2αT₂ = αT + (2αTₒ - αTₒ - 2)

2αT₂ = αT + αTₒ - 2αTₒ + αTₒ - 2

2αT₂ = αT - αTₒ - 2

Dividing both sides by 2α, we obtain:

T₂ = (αT - αTₒ - 2) / (2α)

Part (b) To find the temperature T₂ in degrees Celsius, we substitute the given values:

T₂ = (5.5x10⁻³T - 5.5x10⁻³(229) - 2) / (2x5.5x10⁻³)

T₂ = (5.5x10⁻³T - 1.2595 - 2) / (11x10⁻³)

T₂ = (5.5x10⁻³T - 3.2595) / (11x10⁻³)

Part (c) To find the resistance R at 2Tₒ, we use the formula for resistance:

R = (ρL) / A

where ρ is the resistivity, L is the length, and A is the cross-sectional area. Given the wire length L = 1 m and the radius r = 1 cm (which is equal to 0.01 m), we can calculate the cross-sectional area A:

A = πr² = π(0.01)² = 0.0001π m²

Substituting the given resistivity ρₒ = 4.5x10⁻⁷ Ω·m at Tₒ = 229 °C, we can calculate the resistance R at 2Tₒ:

R = (ρL) / A = (4.5x10⁻⁷)(1) / (0.0001π) = 0.045 / π Ω

Therefore, the resistance R at 2Tₒ is approximately 0.045 / π Ω.

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Both the force of "Hand on the book" and the force of "Earth on the book" are directed upward. The ground and the book are being drawn in toward the hand. As a result, the forces pulling on the hands are "Book on hand" and "Earth on hand."

Gravity, usually referred to as gravitation, is the unchanging force of attraction that binds everything together in physics. Being the weakest known force in nature, it has minimal effect on defining the inherent properties of everyday objects.

The force "Hand on the book" is directed upward, and the force "Earth on the book" is directed downward. The hand is being pulled toward the book and the earth.

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May Help:

In classical physics terms, you do work on an object when you exert a ... to do work (follow the kinetic and potential energy links for a more in ... runs twice as powerfully as the runner that finishes in 5 hours. The unit of power is joules per second or J/s when work is measured in joules and time in seconds.

The following equation can be used to determine the pressure at the bottom of the container:

\(P_b_o_t_t_o_m = P_a_t_m + p_m_e_r_c_u_r_y_g_h\)

where

h is the height difference between the two arms of the manometer (in m),

g is the acceleration due to gravity (in m/s2),

\(P_a_t_m\) is the atmospheric pressure (in Pa), and

\(p_H_g\) is the density of mercury (kg/m3) In).

To find the height difference h, we need to use the density difference between mercury and alcohol. We can write:

ρ_mercury * g * h = ρ_alcohol * g * h'

where

ρ_alcohol is the density of alcohol (in kg/m³) and

h' is the height difference between the mercury level and the alcohol level in the arm of the manometer that is in contact with the alcohol.

Solving for h, we get:

h = (ρ_alcohol / ρ_mercury) * h'

Therefore, the first equation can be used to determine the pressure at the bottom of the container once we know h.

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The probability that a loaf of bread chosen at random will have a mass of more than 450g is 0.0026 or 0.26%.

The probability that a loaf of bread chosen at random will have a mass of more than 450g is found by first standardizing the random variable, using the standard normal distribution. We can then use the standard normal table or calculator to find the area to the right of the standardized value. The standardized random variable can be found using the formula

Z = (X - μ) / σ,

where X is the given value, μ is the mean, and σ is the standard deviation.

Substituting the given values, we get:

Z = (450 - 400) / 18 = 2.78

Using the standard normal table or calculator, we can find the area to the right of 2.78. This area represents the probability that a loaf of bread chosen at random will have a mass of more than 450g.

Using a standard normal table or calculator, we find that this area is 0.0026 or 0.26%.

Hence, the probability that a loaf of bread chosen at random will have a mass of more than 450g is 0.0026 or 0.26%.

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Answer:

D hope this helps plz mark brainliest

Explanation:

The acceleration of the sled is, the acceleration is equal to the acceleration of gravity multiplied by the sine of the angle for a frictionless incline of degree.

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The strength of the magnetic field at the center of the solenoid is 0.006 T

The strength of the magnetic field at the center of a solenoid is given by:

B = μ₀ * n * I

where B is the magnetic field strength, μ₀ is the permeability of free space, n is the number of turns per unit length of the solenoid, and I is the current flowing through the solenoid.

In this case, the length of the solenoid is not given, but we can assume that it is much greater than the diameter of the solenoid, so we can treat it as a long solenoid. The number of turns per unit length is given as 200 loops divided by the length of 6.5 cm, or:

n = 200 / 0.065 m = 3076.92 turns/m

The current flowing through the solenoid is 5 A.

The permeability of free space, μ₀, is a constant with a value of 4π x 10^-7 T m/A.

Therefore, the magnetic field strength at the center of the solenoid is:

B = μ₀ * n * I

= 4π x 10^-7 T m/A * 3076.92 turns/m * 5 A

= 0.006 T

So the strength of the magnetic field at the center of the solenoid is 0.006 T. The north pole of the solenoid is the end from which the magnetic field emerges, and the south pole is the end where it enters.

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Answer:

The box gains 3200 J of kinect energy.

Explanation:

Kinect energy is the energy of an object has because of its motion. Almost anything that has mass and it's in motion has kinect energy. Examples:

Also known as the principle of work and kinect energy, it states that the work done by all forces acting upon an object equals the change of its kinect energy.

For example, if you pull a box, then you're exerting a force on it and it moves forward. Since the box has mass and it's in motion, you have changed its kinect energy.

Solution:

Write the data down:

\(\bullet \quad \mathsf{m=50\,kg}\\\\\bullet \quad \mathsf{F=400\,N}\\\\\bullet \quad \mathsf{d=8\,m}\)

Apply work energy theorem:

\(\mathsf{W}= \Delta\mathsf{K}\)

The amount work done equals the change of kinect energy:

\(\mathsf{W}=\mathsf{K-K_o}\)

Since the block is at rest at the beginning, so it has zero initial kinect energy:

\(\mathsf{W}=\mathsf{K-0}\\\\\\\mathsf{W}=\mathsf{K}\)

Now, apply the formula for work to the left hand side of the equation:

\(\mathsf{F\cdot d}=\mathsf{K}\\\\\\\mathsf{400\cdot 8}=\mathsf{K}\\\\\\\therefore \boxed{\mathsf{K=3200\,J}}\)

Conclusion: the box has gained 3200 J of kinect energy.

Happy studying!

Brainly Team

Answer:

Alexander Graham Bell

Hope this helps :)

hope this helps

The correct choice is the third option.

This comes from the fact that the packing material cushions the impacts of the content in case of a fall.

The metal in the spoon is an excellent conductor is correct sentences.

Conductors are the elements or materials that allow electricity to pass through them. They conduct electricity because they allow for simple electron passage between atoms inside of them. Conductors also allow heat or light to be transferred between sources. People, the earth, metals, and living things are all examples of conductors. We occasionally get electric shocks as a result. Additionally an excellent conductor of electricity is the human body. Therefore, it provides an unimpeded conduit for the electricity to travel from wire to body.

Conductors are made easy for current to pass through by the presence of free electrons on their surface. The capacity of conductors to carry electricity is based on this.

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Answer:

10 s

Explanation:

Given:

Δx = 100 m

v₀ = 0 m/s

a = 2 m/s²

Find: t

Δx = v₀ t + ½ at²

100 m = (0 m/s) t + ½ (2 m/s²) t²

t = 10 s

To determine the depth of the well, we can use the relationship between the wavelength of the sound wave and the depth of the well. The standing wave pattern in the well is created by the interference between the sound wave emitted by the person and the reflected wave from the bottom of the well. The depth of the well is approximately 3.18 meters.

The formula for the wavelength of a standing wave in a closed pipe (like a well) is:

λ = 2L/n

Where:

λ is the wavelength

L is the length of the pipe (depth of the well)

n is the harmonic number (1 for the fundamental frequency, 2 for the second harmonic, 3 for the third harmonic, and so on)

In this case, we have three standing waves with frequencies of 54 Hz, 90 Hz, and 126 Hz. We need to find the fundamental frequency (first harmonic) among these three frequencies.

To find the fundamental frequency, we need to determine the harmonic number (n) for the frequency of 54 Hz. We can do this by comparing it with the harmonic numbers of the other frequencies.

Let's calculate the harmonic numbers for the frequencies of 90 Hz and 126 Hz:

Now, let's find the harmonic number (n) for the frequency of 54 Hz:

n = (\(v_{sound}\)) / (2L) = (343 m/s) / (2L)

Since we don't know the harmonic number for 54 Hz, we'll assume it as the fundamental frequency (n = 1) and find the corresponding length of the well (L).

Using the formula for the wavelength, we have:

λ = 2L/n

For the assumed fundamental frequency (n = 1) of 54 Hz:

λ = 2L/1

The speed of sound (\(v_{sound}\) ) is given as 343 m/s. The wavelength (λ) can be calculated using the formula:

λ = \(v_{sound}\)/ f

Where:

f is the frequency

For the assumed fundamental frequency (54 Hz):

λ = (343 m/s) / (54 Hz)

Now, we can equate the two expressions for λ and solve for L (the depth of the well):

2L = (343 m/s) / (54 Hz)

L = ((343 m/s) / (54 Hz)) / 2

L = 3.18 m

Therefore, the depth of the well is approximately 3.18 meters.

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Answer:

Volt metre (Vm)

or Newton/Coulomb x (Metre)^2       (N/C x m^2)

Answer:

sodium chloride

Explanation:

The correct statement regarding the work and impulse required to move a box on the floor from 2v to 3v and from 3v to 4v is Case i requires less work, but i and ii require the same amount of impulse.

W = ΔKE

W = Work done

ΔKE = Change in Kinetic energy

ΔKE = 1 / 2 m ( v2 - v1 )²

J = m Δv

J = Impulse

m = Mass

Δv = Change in velocity

For ( i ),

W = 1 / 2 m ( ( 3 v )² - ( 2 v )² )

W = 1 / 2 m ( 9 v² - 4 v² )

W = 2.5 m v²

J = m ( 3 v - 2 v )

J = m v

For ( ii ),

W = 1 / 2 m ( ( 4 v )² - ( 3 v )² )

W = 1 / 2 m ( 16 v² - 9 v² )

W = 3.5 m v²

J = m ( 4 v - 3 v )

J = m v

Therefore,

i ) W1 < W2

ii ) J1 = J2

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Answer kelvin

Explanation:

Three students measured the length of a stamp whose accepted length is 2.71 cm, on the basis of the table student 2 is both precise and accurate, therefore the correct answer is option B.

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.

The degree to which a measurement is accurate in relation to its true value. The degree to which the same results are produced by repeated measurements under the same circumstances is known as precision.

Thus, according to the chart, student 2 is both exact and accurate, hence the proper response is option B. Three students measured the length of a stamp, and the approved length is 2.71 cm.

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