A scientist performs an experiment and asks other scientists around the
world to replicate it. Why would other scientists most likely try to perform the
same experiment?


pls answer 5 and an explanation

Answer:

  A. 0.806 kN

  B. 0.303 kN

Explanation:

The kinetic energy of the ball is ...

  KE = 1/2mv² = 1/2(0.206 kg)(18 m/s)² = 33.372 J

The work required to reduce this to zero over a distance of 4.14 cm is ...

  W = Fd

  F = W/d = (33.372 J)/(0.0414 m) = 0.806 kN

__

When the distance is 11 cm, the force is ...

  F = (33.372 J)/(0.11 m) = 0.303 kN

The time taken for the hare to catch up with the tortoise is 10 seconds.

The time taken for the hare to catch up with the tortoise is calculated by applying the principle of relative velocity as shown below.

Distance travelled by hare + Distance travelled by tortoise = Total distance

V₁t + V₂t = d

where;

Since they are moving in the same direction, the relative velocity becomes

V₁t - V₂t = d

(V₁ - V₂)t = d

(4 - 1)t = 30

3t = 30

t = 30/3

t = 10 seconds

Thus, the time taken for the hare to catch up with the tortoise is 10 seconds.

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The complete question is below:

A tortoise and a hare run to the East. The hare knows that it is faster, so it gives the tortoise a 30-meter head start. The tortoise is moving east at 1 m/s and the hare is moving east at 4 m/s. At what time does the hare catch up with the tortoise?

The bike is travelling at 22.5 m/s after 2.5 s

This is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

a = (v – u) / t

a = (15 – 0) / 5

a = 3 m/s²

a = (v – u) / t

3 = (v – 15) / 2.5

Cross multiply

v – 15 = 3 × 2.5

v – 15 = 7.5

Collect like terms

v = 7.5 + 15

v = 22.5 m/s

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The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.

The p-waves travel with a constant velocity of 7 km/s

The time can be calculated by using the formula

t = d / v

where

T1 =  10:05 a.m

d is the distance they take to travel from the epicenter

v is the speed of the p-waves

On average, the speed of p-waves is

v = 7 km/s

d = 5600 km (given)

Substituting the values in the formula;

t = d / v

t = 5600 ÷ 7

t = 800 seconds

Converting into minutes,

t = 800 ÷ 60

t = 13.3

≈ 13 mins

T1 -  13 mins = T2

10:05 - 13 mins = 9.52 am

It means the earthquake occurred prior 13 minutes, that is at 9.52 am.

Therefore, the earthquake occurred at 9.52 am.

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Answer:

Approximately \(26.8\; {\rm m\cdot s^{-1}}\).

Explanation:

When an object of mass \(m\) travels around a circle of radius \(r\) with a (tangential) speed of \(v\), the (centripetal) net force on this object would be \(F_\text{net} = (m\, v^{2} / r)\).

In this question, forces on this toy are:

It is implied that the table top is horizontal. Hence, weight and normal force on the toy would balance each other. The tension in the string would be equal to the net force on the toy.

Let \(m\) denote the mass of the toy, let \(v\) denote the linear speed of the toy, and let \(r\) denote the radius of the circle. The tension in the string would be equal to the net force \(F_\text{net}\) on the toy, \((m\, v^{2} / r)\).

When the tension in the string is at the maximum value, \(F = 450\; {\rm N}\). Rearrange this equation to find velocity \(v\):

\(\begin{aligned}\frac{m\, v^{2}}{r} = F_{\text{net}} \end{aligned}\).

\(\begin{aligned}v &= \sqrt{\frac{F_{\text{net}}\, r}{m}} \\ &= \sqrt{\frac{(450)\, (1.2)}{(0.75)}}\; {\rm N} \\ &\approx 26.8\; {\rm N}\end{aligned}\).

The magnitude of OC is approximately 5.8 units, and the angle between the x-axis and vector OC is approximately 59.0 degrees

To evaluate the magnitude of vector OC, which is represented by vector C = (-3, -5), we can use the formula for the magnitude of a vector. The magnitude of a vector (denoted as ||v||) can be calculated using the Pythagorean theorem.

Magnitude of OC = ||C|| = √((-3)^2 + (-5)^2) = √(9 + 25) = √34 ≈ 5.8

To find the angle between the x-axis and vector OC, we can use trigonometry. The angle can be determined by finding the arctan of the y-component divided by the x-component of vector C.

Angle = arctan(-5 / -3) = arctan(5/3) ≈ 59.0 degrees

Therefore, the magnitude of OC is approximately 5.8 units, and the angle between the x-axis and vector OC is approximately 59.0 degrees (rounded to the nearest tenth).

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Answer:

The answer is:    

150 m

Explanation:

find acceleration first.

Vf = at + Vi

20 = a(15) + 0

a = 1.33m/s^2

x = 1/2at^2

x = 1/2 (1.33) (15)^2

x = 149.625m or round it to 150m

hope this helps

Answer:

1.33

Explanation:

We know

speed =distance travelled

time taken

so here distance travelled is 20.0 m/s

and time taken is 15.0s

now simplify

s=20.0/15.0

=4/3

=1.33

hope you understood it!

In order to plot each sieve % on the distribution curve, you must divide the entire mass of the sample material by the weight that was either retained or that passed thru every sieve.

As the asymmetric energy sieve method directly provides weight distribution, sieve methodology provides sieve diameter, which is determined as the micrometer of the globe that passes through the sieve aperture. By using the sieve process, particles of sizes between 50 and 1500 m are estimated.

Adaptive mien scattering and laser particulate analyzers are two of the primary categories of particle size analyzers. Particles in solutions are measured by dynamic light diffracted analyzers between 0.6 nm and For particle in a substance that are between 10 nm and 3 mm in size, analyzers are utilized.

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Step 7: As we can see, there are numerous ways to position the three magnets to create the same pattern.

The pattern genuinely demonstrates repulsion. It indicates that the magnets' poles are the same since they are positioned that way.

A substance that generates a magnetic field and demonstrates magnetic qualities is known as a magnet. Iron, nickel, and cobalt are just a few of the metals that it can draw. Lodestone is an example of a naturally occurring magnetized mineral.

Magnets may also be manufactured artificially using techniques like magnetization. The north pole and the south pole are the two poles of a magnet.

Step 8: A different pattern of the three magnets can still produce a magnetic field.

There is fascination in the pattern. This indicates that the magnets' various poles attract.

Summing up:

1. It's possible that we can't tell whether is north or south.

2. We can actually distinguish between the ones that are north and south. This is seen in how they draw people to them.

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In a ocean full of storms

A new wave was born

Deep into that darkness flooding

Suddenly, I heard some pummeling

By the grave I saw the winds

And the sun just shined

Answer:

a friendly face that comes with waves,

the waves of all the memorial days,

and with these days we smile with pride,

as for the waves we used to ride,

given up the day has passed,

how it went away like an hour glass,

as if we knew the world was right,

just like the waves, oh so bright,

the time has come the days have passed,

the waves ashore the waves alast,

as if the friendly face was right,

the waves that rode, oh goodnight.

The electrostatic force of attraction between the proton and electron is 4.2 x 10⁻⁸N.

The gravitational force between the proton and electron is 1.9 x 10⁻⁴⁷N.

a) Charge on proton = charge on electron = q = 1.6 x 10⁻¹⁹C

Distance between the proton and electron, r = 7.4 x 10⁻¹¹m

The electrostatic force of attraction between the proton and electron is given by,

F = 1/4πε₀(q²/r²)

F = 9 x 10⁹ x (1.6 x 10⁻¹⁹)²/(7.4 x 10⁻¹¹)²

F = 9 x 10⁹ x 2.56 x 10⁻³⁸/54.76 x 10⁻²²

F = 4.2 x 10⁻⁸N

b) Mass of the electron, m₁ = 9.1 x 10⁻³¹kg

Mass of the proton, m₂ = 1.67 x 10⁻²⁷kg

Distance between the proton and electron, r = 7.4 x 10⁻¹¹m

The gravitational force between the proton and electron is given by,

F = Gm₁m₂/r²

F = 6.67 x 10⁻¹¹x 9.1 x 10⁻³¹x 1.67 x 10⁻²⁷/(7.4 x 10⁻¹¹)²

F = 1.9 x 10⁻⁴⁷N

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We will have the following:

Electron: Particle that moves around the nucleus.

Proton: Positively charged particle in the nucleus.

Neutron: Neutral particle in the nucleus.

equal in magnitude but opposite in direction

Answer:

13.5

Explanation:

Mass: 5kg

Initial Velocity: -15

Final Velocity: 12

Force: 10

We can use the equation: Vf = Vi + at

We need to find acceleration, and we can use the equation, F=ma,

We have mass and the force so it would look like this, 10=5a, and 5 times 2 would equal 10, so acceleration would be 2.

Now we have all the variables to find time.

Back to Vf = Vi + at, plug the numbers in, 12 = -15 + 2(t)

Plugging them in into desmos gives 13.5 for time.

Answer:

Your answer is wavelength

The resistance in the LED, CFL, and incandescent lightbulb would be 2.50 ohms.

Resistance is the obstruction of electrons in an electrically conducting material.

As given in the problem On three separate instances you connect each lightbulb to a battery with an and of 12.00V and an internal resistance of 0.5. When a current of 4A passes through the battery,

resistance = voltage /current

                  = 12 volt/4 ampere

                  = 3 Ohm

The total resistance across the circuit = internal resistance + resistance across the bult

resistance across the bulb = 3 - .50

                                            =2.5 Ohms

Thus, the resistance in the LED, CFL, and incandescent lightbulb would be 2.50 ohms

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Answer:analize a afirmacao a seguir e tudo que envolve o gerenciamento da marca e que ultrapassa as acoes com objetivos economicos e refere se a cultura principios e valores

Explanation:

Answer: The lowest outside temperature for which the sleeping bag provides adequate protection is approximately 89.61°C below the hiker's skin temperature of 34°C.

Explanation:

To find the lowest outside temperature for which the sleeping bag provides adequate protection, we need to determine the rate of heat loss through conduction and compare it to the heat loss the hiker can safely tolerate.

The rate of heat loss through conduction can be calculated using the formula:

Q = (k * A * ΔT) / d

Where:

Q is the rate of heat transfer (in Watts)

k is the coefficient of thermal conductivity (0.019 Wm¹¹°C-¹ in this case)

A is the surface area (1.3 m² in this case)

ΔT is the temperature difference (in this case, the difference between the skin temperature and the outside temperature)

d is the thickness of the sleeping bag (30 mm, which needs to be converted to meters by dividing by 1000)

Let's plug in the values:

Q = (0.019 * 1.3 * ΔT) / (30 / 1000)

The hiker can safely lose 85 W of heat, so we can set up the equation:

85 = (0.019 * 1.3 * ΔT) / (30 / 1000)

To solve for ΔT, we can rearrange the equation:

ΔT = (85 * (30 / 1000)) / (0.019 * 1.3)

ΔT ≈ 89.61°C

All the equations of motion are as follows, Displacement (s) equation, Final velocity (v) equation, Average velocity (v_avg) equation, Displacement (s) equation with average velocity, and Displacement (s) equation.

In terms of its motion as a function of time, equations of motion define how a physical system behaves. In more detail, the equations of motion define how a physical system behaves as a collection of mathematical functions expressed in terms of dynamic variables.

In conclusion, equations of motion define how a physical system behaves in terms of how its motion changes over time.

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When the length of the wire is doubled while connected to the same voltage source, the power dissipated in the wire falls by a ratio of 4.

The resistance of the wire increases as it is stretched to double its length. This can be seen from the formula for resistance, which is R = ρL/A, where ρ is the resistivity of the material, L is the length, and A is the cross-sectional area of the wire. When the length is doubled, the resistance will also double.

If the wire is hooked up to the same voltage source, the power dissipated in the wire can be calculated using the formula P = V²/R. Here, V is the voltage and R is the resistance. Since R has doubled, the power dissipated will decrease by a factor of 4. This can be seen by substituting 2R for R in the formula:

P' = V²/(2R) = (1/4)(V²/R) = (1/4)P

Therefore, the power dissipated in the wire decreases by a factor of 4 when its length is doubled while it is hooked up to the same voltage source.

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Answer:

The formation of a magnetosphere requires that the dipolar field is strong enough for the obstacle effective size to be larger (Dp > 20λi) than ion scales. In this case, a bow shock, magnetosheath, and magnetospheric system are driven, and the flow is modified far upstream.

The maximum height be 3.01 m.

According to the law of conservation of energy: The total energy of the system is conserved in a closed system, also known as an isolated system.

Given parameters:

Mass of the box: m = 2.0 kg

Spring constant: k = 2000 N/m.

Compression of spring: x = 20 cm = 0.2m

Angle of inclination: θ = 37°

Coefficient of friction: μ = 0.1

If the box raises up to distance d then according to law of conservation of energy:

1/2kx² = mgdsin37° + μ mg d sin37°

1/2kx² = mgdsin37°(1 + μ)

d = 1/2kx²/(1+μ)mgsin37° = 1/2 × 2000 × 0.2²/{(1+0.1) × 2 × 10 × sin37°}

= 3.01 m.

Hence,  The maximum height be 3.01 m.

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The wavelength of the sound wave with a frequency of 415.3 Hz is approximately 3.565 m.

The speed of sound in water is approximately 1482 m/s. Use the formula v = f × λ, where v = velocity (speed of sound), f = frequency, and λ = wavelength.

Given:

Frequency of the first sound wave (f₁) = 257.2 Hz

Wavelength of the first sound wave (λ₁) = 3.25 m

Velocity of sound in water (v) = 1482 m/s

Rearrange the formula to solve for λ₂ (wavelength of the second sound wave):

v = f × λ

λ = v / f

Substituting the values:

λ₂ = v / f₂

= 1482 m/s / 415.3 Hz

Calculating:

λ₂ ≈ 3.565 m

Therefore, the wavelength of the sound wave with a frequency of 415.3 Hz is approximately 3.565 m.

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Each of the five friends needs to pay £12 to cover the cost of their own meals and contribute towards the birthday person's meal. Using mean allows us to distribute the cost equally among the friends, ensuring a fair division of expenses for the meal.

To determine how much each of the five friends needs to pay, we can use the concept of averages (mean) and divide the total cost by the number of people paying.

In this scenario, the total cost of the meal for 6 people is £12 per person. Since the other 5 friends have decided to pay for the birthday person's meal, they will collectively cover the cost of their own meals plus the birthday person's meal.

To calculate the total cost covered by the five friends, we can subtract the cost of one person's meal (since the birthday person's meal is being paid by the group) from the total cost. The cost of one person's meal is £12.

Total cost covered by the five friends = Total cost - Cost of one person's meal

= (£12 x 6) - £12

= £72 - £12

= £60

Now, to find out how much each of the five friends needs to pay, we divide the total cost covered by the five friends (£60) by the number of friends (5).

Amount each friend needs to pay = Total cost covered by the five friends / Number of friends

= £60 / 5

= £12

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The minimum deceleration required to stop the car in 35 meters is 40000 m/s^2.

Deceleration is defined as  the decrease in speed as the body moves away from the starting point.

The minimum deceleration required can be calculated using the equation of motion:

d = v^2 / (2 * a)

where d is the distance, v is the initial velocity, and a is the acceleration.

Rearranging the equation to solve for a:

a = v^2 / (2 * d) = (3500 m/s)^2 / (2 * 35 m) = 40000 m/s^2

In conclusion, , the minimum deceleration required to stop the car in 35 meters is 40000 m/s^2.

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