For another identical object initially at rest, no frictional force is exerted during segment 2 (between t = 2 s and t = 4 s). A rope exerts the same constant force of magnitude F T as in the previous scenario. What is the change in the object's kinetic energy during segment 2?

Answer:

E. None of these statements are true.

Explanation:

We can't say the exact or approximate amount of tension on the rope, since we do know for sure from the statement who is winning.

for A, the tension on the rope does not depend on if both teams pull are in equilibrium.

for B, the 49ers would be pulling with a force more than 5000 N, if they were winning. The problem is that we can't say with all confidence that they'd be winning.

for C, we don't know how much tension exists on the rope, and its direction, so we can't work out how much tension the 49ers are pulling the rope with.

for D,  just as for C above, we can't work out how much tension there is on the rope, since we do not know how much force the 49ers are pulling with.

we go with option E.

Answer:

?!?!?!?!?!?!

Explanation:

?!?!?!?!?!?!?

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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Answer:

340

Explanation:

Sorry I don't know how to do this one yet, I just found the answer in a textbook.

The angle that vector a makes with the +x axis is closest to 23.

The direction of a vector is represented tangent of angle equal to the ratio of the y component and the x component of the vector quantity.

tangent of angle = y/x

angle = tan⁻¹ (-2.3/5.3)

angle = 23.46°

Thus, the angle that vector makes with +x is 23.

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Answer:

the calculated ratio to the radius of the sodium \(r_{100\) / \(r_{Na\) is 2645.0

Explanation:

Given the data in the question;

the calculated ratio to the radius of the sodium = \(r_{100\) / \(r_{Na\)

so from here we can write the number of energy states as 100

The number of energy states; n = 100

A;

We know that the radius of the sodium atom is;

\(r_n\) = n²α₀

Now, the value of the Bohr radius; α₀ = 5.29 × 10⁻¹¹ m

so lets determine the radius of the sodium atom; by substituting in our values;

\(r_{100\) = (100)² × (5.29 × 10⁻¹¹ m )

\(r_{100\) = 5.29 × 10⁻⁷ m

B

given that, the theoretical value of the radius of the sodium is;

\(r_{Na\) = 0.2 nm = 2 × 10⁻¹⁰ m

so we calculate the ratio of the radii of the sodium;

\(r_{100\) / \(r_{Na\) = ( 5.29 × 10⁻⁷ m ) / ( 2 × 10⁻¹⁰ m )

\(r_{100\) / \(r_{Na\) = 2645.0

Therefore, the calculated ratio to the radius of the sodium \(r_{100\) / \(r_{Na\) is 2645.0

Answer:

A.   number of neutrons of Magnesium Mg = 13

B.   The average mass of Mg = 22.29 amu

C.   the magnesium composition on Mars is not the same as that on Earth.

Explanation:

Isotopes are atoms with the same atomic number but different mass number. This is due to the difference in mass of the neutrons.

The atomic number of Magnesium Mg = 12

The atomic number of an element is the number of protons present in the atomic nucleus of the element

i.e Atomic number = number of protons = 12

The mass number of an element is the sum of the protons and neutrons in the atomic nucleus of the element.

Mass number = number of protons + number of neutrons

Given that the mass number of Mg = 25

Then;

25 = 12 + number of neutrons

25 - 12 = number of neutrons

13 = number of neutrons

number of neutrons of Magnesium Mg = 13

B. What is the average atomic mass of magnesium in these rocks?

The average atomic mass of an element which exhibit isotopy is the average mass of its various isotopes as they occur naturally in any quantity of the element.

Therefore the average atomic mass of magnesium can be calculated as:

= \(\mathtt{\dfrac{(23.9872 \times 79.70) + ( 24.9886 \times 10.13) + (25.9846 \times 10.17) }{79.7 + 10.13 +10.17}}\)

= \(\mathtt{\dfrac{(1911.77984) + ( 53.134518) + (264.263382) }{100}}\)

= \(\mathtt{\dfrac{2229.17774 }{100}}\)

The average mass of Mg = 22.29 amu

C. Is the magnesium composition on Mars the same as that on Earth? Explain.

The average atomic weight of magnesium on Earth is said to be 24.305 amu while that of Mars is 22.29 amu.

There difference in the average atomic weight result into difference in their composition. Therefore,the magnesium composition on Mars is not the same as that on Earth.

Answer:

The answer is 0.042 Hz (rounded)

or 0.0417 Hz

Explanation:

Hope it helps

Answer:

The answer is 0.041Hz

Explanation:

The answer is 0.041Hz

I guess

Answer:

Explanation:

For fundamental frequency in a vibrating string , the formula is

n = 1 / 2L  x  √ ( T /m₁ )

n is frequency , L is length , T is tension and m₁ is mass per unit length .

For first string ,

293 =  1 / 2L  x  √ ( 49 N  /m₁ )

For second string , let mass per unit length be m₂ .

196 =  1 / 2L  x  √ ( 49 N  /m₂ ) ------ ( 1 )

To bring its frequency back to previous one let tension be T

293  =  1 / 2L  x  √ ( T  /m₂ ) ------- ( 2 )

Dividing

293 / 196 = √ ( T  /49  )

1.4948 = √ ( T  /49  )

2.2344 = T  /49

T = 109.48 N .

Explanation:

F = ma

m = F/a

= 12N / 2m/s2

= 6kg

The mass of the object is 6kg.

A force is defined as an effect that can change the motion of an object by which an object with mass can change its velocity, that is, accelerate. Force can also be described simply as a push or pull. A force has both magnitude and direction which makes it a vector quantity.

According to the Newton's second law of motion is F = ma, or force is equal to mass times acceleration.  

Where, F= Force applied

m= mass of the object

a= acceleration

For above given information,

F= 12 N

Acceleration= \(2 m/s^2\)

So, mass will be m=F/a

m= 12/2 = 6kg

Thus, the mass of the object is 6kg.

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Answer:

B. 1990

This article is part of the NASA Knows (Grades 5-8) series. The Hubble Space Telescope is a large telescope in space. It was launched into orbit by space shuttle Discovery on April 24, 1990. Hubble orbits about 547 kilometers (340 miles) above Earth.

Answer: 1990

Explanation: Wikipedia say “The Hubble Space Telescope (often referred to as HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned both as a vital research tool and as a public relations boon for astronomy. The Hubble telescope is named after astronomer Edwin Hubble and is one of NASA's Great Observatories, along with the Compton Gamma Ray Observatory, the Chandra X-ray Observatory, and the Spitzer Space Telescope.”

Answer: Constant Speed

Explanation:

Object's speed does no(sic) change over its entire distance.

No change in speed means that the object is either at constant speed, or is stationary.

Answer:

I think A is correct.

Explanation:

If it's not I'm sorry probably my fault but I hope this helps:)

The relative density of aluminum is 2.7. This means that aluminum is 2.7 times denser than water, which is the reference substance often used for comparing densities

The relative density (also known as specific gravity) of a material is the ratio of its density to the density of a reference substance. In this case, we are given the density of aluminum as 2.7 x 10^3 kg/m^3.

To find the relative density, we need to compare it to the density of the reference substance. The most commonly used reference substance for relative density is water, which has a density of 1000 kg/m^3.

Relative density = Density of the material / Density of the reference substance.Relative density = (2.7 x 10^3 kg/m^3) / (1000 kg/m^3)

Relative density = 2.7

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Indeed, you can run this experiment by adjusting the length (1) of the thread.

The pendulum's period is influenced by the length of the thread; the longer the string, the longer the pendulum's period. The frequency of the pendulum, or how quickly it swings back and forth, is also impacted by this.

The variables for plotting the graph would depend on the specific experiment and the data being collected. However, some possible variables that could be plotted on a graph include:

Length of the thread on the x-axis

Measured behavior or characteristic of the object or system on the y-axis

Constants or controlled variables, such as the mass or shape of the object being measured, on the graph as well.

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(a) The distance  the car travels during your reaction time is 2.83 m.

(b) The total distance traveled by the car before stopping is 97.8 m

To find the distance traveled during the reaction time, we need to find the velocity after the reaction time and then use it to find the distance traveled.

78 km/h = 78,000 m/h ÷ 3600 s/h = 21.67 m/s

After the reaction time, the velocity is equal to the initial velocity plus the acceleration during the reaction time:

v = v₀ + at

v = 21.67 m/s - (4.6 m/s²)(0.130 s)

v = 21.67 m/s - 0.599 m/s

Finally, the distance traveled during the reaction time is given by:

d = v₀t  + ¹/₂at²

d  = 21.67  x 0.130 s    +    ¹/₂(-4.6) x (0.130)²

d = 2.83 m

B) To find the total distance traveled before stopping, we need to find the time it takes for the velocity to reach 0.

The velocity after the reaction time is equal to 21.67 m/s - 0.599 m/s = 21.07 m/s.

Using the equation v = v₀ + at, we can find the time it takes to come to a stop:

t = -v₀ / a

t = -21.07 / -4.6

t = 4.58 s

The total distance traveled can be found using the equation:

d =  v₀t  + ¹/₂at²

d  = 21.67 x 4.58  + ¹/₂(-4.6) x 4.58

d = 97.8 m

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Answer:

The ejection of electrons from metals illuminated with different frequencies of light (photoelectric effect)

Explanation:

Ejection of electrons from metals illuminated with different frequencies of light provides evidence for the particle theory of light

The photoelectric effect proves that light has particle-like activity. The photoelectric effect happens when photons are shone on metal and electrons are ejected from the surface of that metal. The electrons that are ejected are determined by the wavelength of light which determines the energy of photons.

correct answer is

Ejection of electrons from metals illuminated with different frequencies of light

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Subsequently, someone argues that the TOTAL ACCELERATION of the pendulum can NEVER be ZERO, in that, when one component is zero the other is not is True statement. (B)

The total acceleration of a swinging pendulum can have both a linear and a centripetal component. Therefore, when one component is zero, the other is not, and the total acceleration of the pendulum can never be zero.

For example, when a pendulum is at its maximum height, the linear acceleration is zero, but the centripetal acceleration is at its maximum.

Similarly, when the pendulum is at its midpoint, the linear acceleration is at its maximum, and the centripetal acceleration is zero. Therefore, the total acceleration of the pendulum can never be zero.

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Answer:

The characteristics that determine how easily two substances change temperature are:

The volume and density of the substances and the amount of time they are in contact do not directly affect how easily they change temperature.

Explanation:

Answer:

f(-9) = 184

Explanation:

f(x)=3x²+5x-14

f(-9)= 3(-9)² +5(-9)-14 Order of Operations : Exponents

     =  3(81)+5(-9)-14

     = 243+5(-9)-14

     =  243-45-14

     = 198-14

f(-9)= 184

Hope this helps :)

Answer:

184

Explanation:

The speed of the water balloon after falling for 2.00 s is 16.0 m/s.The distance the water balloon falls in 2.00 s is 32.0 m.The magnitude of the velocity of the water balloon after falling 10.0 m is 78.0 m/s.

Distances and numerical measurement of how far apart to 16 places and points are in space age is often measured in unit like km miles with azure free systems can also be conceptualised in terms of time as in the distance between two points in time.


a) The speed of the water balloon after falling for 2.00 s is 16.0 m/s. This is due to the fact that the acceleration of free fall is 9.8 m/s2. Therefore, the speed of the water balloon after 2.00 s is 8.00 m/s + 9.8 m/s2 × 2.00 s = 16.0 m/s.

b) The distance the water balloon falls in 2.00 s is 32.0 m. This is due to the fact that the distance traveled in free fall is given by the equation d = ½at2, where a is the acceleration of free fall (9.8 m/s2) and t is the time the water balloon has been falling (2.00 s). Therefore, the distance the water balloon falls in 2.00 s is (1/2) × 9.8 m/s2 × (2.00 s)2 = 32.0 m.

c) The magnitude of the velocity of the water balloon after falling 10.0 m is 78.0 m/s. This is due to the fact that the velocity of free fall is given by the equation v = at, where a is the acceleration of free fall (9.8 m/s2) and t is the time the water balloon has been falling (10.0 m/s). Therefore, the magnitude of the velocity of the water balloon after falling 10.0 m is 9.8 m/s2 × 10.0 m/s = 78.0 m/s.

To sketch the a-1, V-t, and y-t graphs for the motion of the water balloon, we can use the equations above to plot the acceleration, velocity, and distance traveled as a function of time. For the a-1 graph, we plot the acceleration of free fall, 9.8 m/s2, as a constant value over time. For the V-t graph, we plot the velocity of the water balloon over time, which is a linear graph increasing from 8.00 m/s to 16.0 m/s at 2.00 s and increasing to 78.0 m/s at 10.0 s. For the y-t graph, we plot the distance traveled by the water balloon over time, which is a parabolic graph increasing from 0 m to 32.0 m at 2.00 s and increasing to 10.0 m at 10.0 s.

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The number of revolutions is 102.655 it makes during this motion, assuming no slipping.

V= u+ at

24.8= 0 + a× 10.1

a= (24.8/10.1) m/s²

s= ut +1/2at² = at²/2

= 24.8/10.1×2 × 10.1²

=125.24m

Circumference of tire = πd. =. 3.14 × 0.389= 1.22

Total revolution= 125.24/ 1.22 = 102.655

What is acceleration?

The measurement of a change in velocity called acceleration. Acceleration typically indicates a change in speed, albeit not necessarily. An object moving in a circular path at a constant speed is still moving forward because the direction of motion is shifting. Acceleration is the rate at which an object's velocity varies in relation to time in physics. Newton's Second Law states that an object accelerates as a result of the total of all the forces acting on it. The SI system uses the meter per second squared (m s2) as the measure of acceleration.

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Answer: Electric charges

Explanation: Atmospheric pressure isn't able to crush you because it doesn't result from weight or surface area. Atmospheric pressure, also known as weather patterns, results from escaping atmospheric gases coming together and creating electric charges. Oceanic pressure in caused from high compression of the upper layers of the water, producing thousands of tons of liquid weight crushing the bottom layer. This is how they are different forms of pressure.

Answer:

Explanation:

In the microscopic world of quantum mechanics, particles don't behave like familiar everyday objects. They can exist in multiple states simultaneously and behave as both particles and waves. When we try to measure or observe a particle, we typically use light or other particles to interact with it. However, this interaction can disturb the particle's state. Imagine trying to measure the position of an electron using light. Light consists of photons, and when photons interact with the electron, they transfer energy to it. This energy exchange causes the electron's position and momentum to become uncertain. The more precisely we try to measure its position, the more uncertain its momentum becomes, and vice versa. This is known as the Heisenberg uncertainty principle.

So, the act of observing a particle disturbs its state because the interaction between the observer and the particle affects its properties. The very act of measurement or observation introduces a level of uncertainty and alters the particle's behavior. It's important to note that this behavior is specific to the quantum world and doesn't directly translate to the macroscopic world we experience in our daily lives. Quantum mechanics operates at extremely small scales and involves probabilities and uncertainties that are not typically noticeable in our macroscopic observations.

Answer:

2,4,5

Explanation:

Answer:

2,4,5

Explanation:

I got it right on edge 2021

Answer:

logistics is the process of storing, transporting and distributing goods to customers. The outbound logistics process starts with a customer sales order, moves on to warehouse packing and ends with product delivery.

Explanation:

Answer:

A. 278K

Explanation:

I look it up it and I used a conversion chart

Answer:

A

Explanation:

The lift force is the force that opposes the weight of an object, so A, the upward force is the correct answer.

Answer:

P = 2 Watts

Explanation:

Given that,

Energy transferred, E = 7200 J

Time, t = 1 hour = 3600 s

We need to find the power of the box. Power is equal to energy transferred per unit time.

\(P=\dfrac{E}{t}\)

Substituting the values,

\(P=\dfrac{7200\ J}{3600\ s}\\\\P=2\ W\)

So, the power of the box is 2 W.