An alligator crawls 25\,\text m25m25, start text, m, end text to the left with an average velocity of -1.2\,\dfrac{\text m}{\text s}−1.2
s
m
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minus, 1, point, 2, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction.

Hi there!

A)
Since the ball's velocity is initially only in the HORIZONTAL direction, there is NO vertical component of its velocity. Therefore, we can treat this like a free-fall scenario. (Dropped from rest).

We can rearrange the following kinematic equation to make solving for the time taken for the balls to hit the ground easier.

\(d_y = v_yt + \frac{1}{2}at^2\)

dy = vertical displacement (height of table, 0.85 m)

vy = initial vertical velocity (0 m/s, only horizontal)
a = acceleration (due to gravity in this situation, 9.8 m/s²)

t = time (? sec)
Simplify and rearrange the variables for 't'.

\(d_y = 0(t) + \frac{1}{2}at^2\\\\d_y = \frac{1}{2}at^2\\\\t^2 = \frac{2d_y}{a}\\\\t = \sqrt{\frac{2d_y}{a}}}\)

Plug in the given values.

\(t = \sqrt{\frac{2(0.85)}{9.8}} = \boxed{0.4165 s}\)

B)

Now, remember that the ball's acceleration in the vertical direction due to gravity does NOT impact its horizontal velocity. Its vertical and horizontal velocities are COMPLETELY independent. Thus, we can simply use the time solved for above and each ball's respective velocities in the following kinematic equation:
\(d_x = v_xt\)

dₓ= horizontal displacement (? m)

vₓ = horizontal component of velocity (3.5 and 5.3 m/s for A and B respectively)

t = time (0.4165 s)

Solve for the distance traveled by each ball:
Ball A:
\(d_x = 3.5 * 0.4165 = \boxed{1.458 m}\)

Ball B:
\(d_x = 5.3* 0.4165 = \boxed{2.207 m}\)

The graph is incorrect because; the title has the incorrect order for the variables. Option D

We know that a graph is made up of two parts. It has two axes and these are what we call the parts of the graph. It is common that we would have the independent variable on the x axis and then we have the dependent variable on the y axis.

With this said, we would now have to look at the graph that has been attached so that we can be able to see what the error in the graph that has been plotted as shown is and how the error that is in the graph can be able to be correct as the student is trying to pass information by the use of a graph system.

The title of the graph can be seen to show that the volume rather than the mass is plotted on the y axis.

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Answer:

  F = 49 N

Explanation:

For this exercise we must use Newton's second law. Let's set a reference frame with the x axis parallel to the floor.

As they indicate that the box is going at constant speed, its acceleration is zero

Y axis y

       N-W = 0

       N = mg

X axis

        F-fr = 0

        F = fr

the friction force has the formula

      fr = μ N

      fr = μ mg

we substitute

            F = μ m g

let's calculate

            F = 0.1 50 9.8

            F = 49 N

here is the answer hope it will help

Since the car is accelerating at a constant rate, the distance it travels during each second of its motion will be directly proportional to the time it has been accelerating.

In the first second, the car moved a distance of 2 meters, and in the second second, it will move twice the distance of the first second, so the car will move additional distance of 2*2 = 4 meters during the second second of its motion.

The distance traveled during the second second of its motion is 1/2 * 2 = 1 meters.

A car that accelerates at a constant rate will move a distance equal to the initial velocity multiplied by time plus 1/2 the acceleration multiplied by the square of time. Since the car starts from rest, the initial velocity is zero.

Therefore, the distance traveled during the second second is 1/2 * acceleration \(* (time)^2 = 1/2 * a * t^2 = 1/2 * a * 1^2 = 1/2 * a\) Since the car moved 2.0 meters in the first second, it means the acceleration is\(2m/s^2\), and the distance traveled during the second second is 1/2 * 2 = 1 meters.

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Answer:

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Explanation:

When you drop a ball from a greater height, it has more kinetic energy just before it hits the floor and stores more energy during the bounce—it dents farther as it comes to a stop.

Answer:

When you drop a ball from a greater height, there is more potential energy. When you release the ball, the potential energy turns into kinetic energy. When the ball bounces off the ground, the ball go upward and then it has more potential energy. Then when it goes down it has more kinetic energy. The ball keeps doing this until there is not enough potential energy left.

Explanation:

The magnitude of the vertical force that a concrete support exerts on the bridge at the far end is 201.25 N.

The force is an action of push or pull which makes a body to move or stop.

Given is the weight of tourist W = 805 N and L is the length of the bridge.

Let the reaction force at both the ends of the bridge is R1 and R2.

Taking the moments about point A,

R1 x 0 - W x L/4 +R2 x L =0

R2 = W/4

R2 = 805 /4

R2 = 201.25 N

Thus, the magnitude of the vertical force that a concrete support exerts on the bridge at the far end is 201.25 N.

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Answer: B

Explanation: i learned it last year

Pedometer is a small portable device that counts every step taken throughout the day. The correct option is (B).

A pedometer is a small portable device that counts the number of steps taken by an individual throughout the day. It is typically worn on the waist or carried in a pocket and uses a mechanism to detect body motion and count each step.

Pedometers are commonly used for tracking physical activity and encouraging individuals to achieve daily step goals as part of their fitness routines.

Therefore, Pedometer is a small portable device that counts every step taken throughout the day. Choose the option (B).

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If a planet has an orbital eccentricity equal to 0.70, then its orbit is

Eccentricity is a measure of how squashed an ellipse is compared to a perfect circle.

The value of eccentricity ranges from 0 to 1, where 0 represents a perfect circle and 1 represents a parabolic orbit (which is not a closed orbit).

An eccentricity of 0.70 indicates that the planet's orbit is significantly elongated and not close to a perfect circle.

Therefore, the correct answer is - A very elongated ellipse.

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The mass of Car B is -6000 kg.

To solve this problem, we can apply the principle of conservation of momentum, which states that the total momentum before the collision is equal to the total momentum after the collision.

Therefore, we can write the equation for the conservation of momentum as:

(mass of Car A * velocity of Car A) + (mass of Car B * velocity of Car B) = (mass of Car A + mass of Car B) * velocity after collision

Let's substitute the given values into the equation:

(2000 kg * 10 m/s) + (mass of Car B * 0 m/s) = (2000 kg + mass of Car B) * (-5 m/s)

Simplifying the equation:

20000 kg*m/s = -5 m/s * (2000 kg + mass of Car B)

Dividing both sides by -5 m/s:

-4000 kg = 2000 kg + mass of Car B

Subtracting 2000 kg from both sides:

mass of Car B = -4000 kg - 2000 kg

mass of Car B = -6000 kg

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a. There are two main types of pluralism: cultural and political

b. Yes, the United States is becoming more pluralistic

c. Ethnic enclaves can be both a positive and negative aspect of pluralism in the US.

a. Pluralism refers to the coexistence of multiple cultures, religions, and ethnicities within a society. There are two main types of pluralism: cultural and political. Cultural pluralism emphasizes the preservation of distinct cultural traditions, while political pluralism emphasizes the equal representation of different groups within the political system.

Cultural pluralism is often associated with the idea of multiculturalism, which recognizes and celebrates the diversity of different cultures. This type of pluralism acknowledges the importance of cultural differences and encourages individuals to maintain and express their cultural identities. In contrast, political pluralism emphasizes the importance of equal representation of different groups within the political system. This can take the form of proportional representation in government or equal access to political power for different groups.

b. The United States is becoming more pluralistic, as the population becomes more diverse and the importance of multiculturalism and political pluralism is increasingly recognized. The country is home to many different ethnic and cultural groups, and these groups are increasingly visible in politics and society. This is evident in the increasing number of ethnic and cultural enclaves, which are areas where different ethnic groups live in close proximity to one another.

c. Ethnic enclaves can be both a positive and negative aspect of pluralism in the US. On the one hand, they allow individuals to maintain their cultural traditions and create supportive communities. On the other hand, they can also lead to segregation and exclusion, as different groups may be reluctant to interact with one another. In order to promote a positive form of pluralism, it is important to encourage interaction and understanding between different groups, while also respecting and celebrating their distinct cultural identities.

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Answer:

The stars at the center bulge are bigger and brighter than the stars in the arms.

Explanation:

The difference between the stars at the center bulge and the stars in the arms is that the stars at the center bulge are bigger and brighter than the stars in the arms.

A collection of the stars, gases and dust is known as a galaxy.

The Milky Way is a galaxy to which our solar system belongs.

Also, The shape of the milky way is spiral.

There are stars located in the center bulge of the Milky Way and the spiral arms of the Milky Way.

It is known that in a galaxy which has a spiral shape, the gases, dust, and stars are organized in such a way that they form a bulge or a disk in the center with spiral arms surrounding it.

Therefore, the structure of the milky way is best described by the statement a core with spiral arms.

The difference between the stars at the center bulge and the stars in the arms is that the stars at the center bulge are bigger and brighter than the stars in the arms.

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There will be exchange of heat in the system, the tub filled with ice will gain heat, while the bottle of liquid will lose heat.

The flow is made possible by means of convection which implies heat flow from region of higher concentration to region of low concentration

by actual movement of material particles

There are basically three modes of heat transfer

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Explanation:

if you go to connexus and are doing the science

Thermal Energy Unit Test 10 qestions 8th grd unit 5 test lesson 12 here are the correct answers

1. A. metal is heated from room temperature to 200'C.

2. B. The particles will have more space between them as steam, but they will be moving at the same speed in both states.

3. C. The potential energy decreases due to the tighter arrangement of the particles.

4. B. an increase in heat and an increase in kinetic energy until a phase change occurs.

5. C. thermometer

6. B. 4.

7. D. convection

8. C. Air moves from the areas of higher temperature to areas of lower temperature.

9. C. The temperature of the ice increases, while the temperature of the water decreases

10. A. heat transfer by radiation.

i hope this helps and please let me know if it does! = ) <3

Answer:

3670 lb.

Explanation:

If we measure the force in pounds, distance in ft and time in hours, then the force need to keep the car from skidding is given by

where k is a constant, w = weight, R = radius of the path, and v = velocity of the car.

Now we know that when v = 45 mph, w = 1800 lb, R = 425, and F = 2600 lb; therefore,

and we need to solve for k.

simplifying the above gives

solving for k gives

Now that we have the value of k, we can find the force needed for

There seemes to be a technical issue with the answer tab. So I wont be able to complete the explanation. But you can find the force by F = (221/729)*(1800*(55^2))/450.

The amount of heat required to change the ice cube of mass 720 g from ice at a temperature of -10 ˚C to water at temperature of 15 ˚C is 300963.6 J

First, we shall obtain the heat required to change the ice from -10 ˚C to 0 °C. Details below:

H₁ = MCΔT

H₁ = 0.72 × 2220 × 10

H₁ = 15984 J

Next, we shall obtain the heat needed to melt the ice. Details below:

H₂ = m × ΔHf

H₂ = 0.72 × 333000

H₂ = 239760 J

Next, we shall determine the heat required to change the water from 0 °C to 15 °C. Details below:

H₃ = MCΔT

H₃ = 0.72 × 4187 × 15

H₃ = 45219.6 J

Finally, we shall determine the heat required to change the ice from -10 ˚C to water at temperature of 15 ˚C Details below:

Q = H₁ + H₂ + H₃

Q = 15984 + 239760 + 45219.6

Q = 300963.6 J

From the above calculations, we can conclude that the heat required to change the ice from -10 ˚C to water at 15 ˚C is 300963.6 J

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Answer:

Both pairs have four pairs of perpendicular sides.

Explanation:

A rectangle and a square both have four right angles and four perpendicular lines.

Answer:

C

Explanation:

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Answer:

Explanation:

Since the path an airplane travels is pretty much horizontal, then acceleration in this dimension is 0 and the equation we use is strictly the d = rt one. Here we use it and solve for t:

\(t=\frac{d}{r}\) and filling in:

\(t=\frac{2.00}{940}\) so

t = .002 hrs which is the same as 7.2 seconds

Answer:down below

Explanation: Mass of first object = 40 kg

Mass of similar second object = 40 kg

Total mass = 40+40 = 80 kg

Force = 200 N

S

Force = Mass × Acceleration

200 = 80 × Acceleration

Acceleration = 200/80 = 2.5 m/s²

Explanation:

The maximum transverse speed vy of the bead can be found using the equation:

vy = Aωcos(kx)

where A is the amplitude of the traveling wave, ω is the angular frequency of the standing wave, k is the wave number of the standing wave, and x is the distance of the bead from the left end of the string.

First, we can find the angular frequency of the standing wave using the equation:

ω = 2πf

where f is the frequency of the standing wave. The frequency of the standing wave can be found using the equation:

f = nv/2L

where n is the harmonic number (which is 2 for the first antinode), v is the speed of the wave (which is the same as the speed of the traveling wave, vx = 14.5 m/s), and L is the length of the string.

Substituting the given values, we get:

f = (2)(14.5 m/s)/(2)(2.25 m) = 6.44 Hz

ω = 2πf = 2π(6.44 Hz) = 40.4 rad/s

Next, we can find the wave number of the standing wave using the equation:

k = nπ/L

where n and L are the same as before.

Substituting the given values, we get:

k = (2)(π)/(2.25 m) = 2.77 rad/m

Finally, we can find the maximum transverse speed vy of the bead using:

vy = Aωcos(kx)

where x is the distance of the bead from the left end of the string, which is 37.5 cm + 18.8 cm = 56.3 cm = 0.563 m.

Substituting the given values, we get:

vy = (2.55 mm)(40.4 rad/s)cos[(2.77 rad/m)(0.563 m)]

vy = (2.55 × 10^-3 m)(40.4 rad/s)cos(1.56 rad)

vy = (1.03 × 10^-1 m/s)

Therefore, the maximum transverse speed vy of the bead is approximately 0.103 m/s.

Answer:

2.94 s

Explanation:

v = u + at

where:

v = final velocity = 9 m/s

u = initial velocity = 0 m/s (rest)

a = acceleration

t = time taken to reach final velocity

We can rearrange the equation to solve for time:

t = (v - u) / a

Substituting the given values, we get:

t = (9 m/s - 0 m/s) / a

Now, we need to find the acceleration. We can use another kinematic equation:

s = ut + (1/2)at^2

where:

s = displacement = 1500 m

u = initial velocity = 0 m/s

a = acceleration

t = time taken to cover the displacement

We can rearrange the equation to solve for acceleration:

a = 2(s - ut) / t^2

Substituting the given values, we get:

a = 2(1500 m - 0 m) / (1500 m / 9 m/s)^2

Simplifying, we get:

a = 3.06 m/s^2

Now, we can substitute this value of acceleration in the earlier equation to find the time taken:

t = (9 m/s - 0 m/s) / 3.06 m/s^2

Simplifying, we get:

t = 2.94 s

Answer:

Initial velocity = 0 × 5/18 = 0 m/s

Final Velocity = 100 × 5/18 = 27.77 m/s

Time = 6 sec

Acceleration

We know that

a = v - u/t

a = 27.77 - 0/6

a = 27.77/6

a = 4.6 m/s²

\( \\ \)

The average acceleration of the car is equal to 4.63 m/s².

The average acceleration is the change in velocity of an object divided by the elapsed time. Acceleration for an object can be described as the rate of change of velocity of the body.

The average acceleration for an interval is the change in velocity for that interval per time. So, the mathematical expression for the average acceleration can be written as:

Average acceleration (a) = △v/△t

If 'u' is the initial velocity and 'v' is the final velocity, and t is the time for the change of the velocity from u to v then a = v - u.

Given, the initial velocity of the car, u = 0

The final velocity of the car, v = 100 Km/hr = 27.77 m/s

The time is taken to change the velocity from 0 to 100 km/hr, t = 6 s

The average acceleration = (27.77 - 0)/6 = 4.63 m/s²

Therefore, the average acceleration of the car is equal to  4.63 m/s².

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The given problem can be exemplified in the following diagram:

We are given that a ladder is against a wall. According to the diagram, the ladder, the wall, and the floor form a right triangle, therefore, if "T" is the distance from the top to the floor and "B" is the distance from the bottom to the wall we can apply the Pythagorean theorem and we get:

Now, since we want to know the speed, we will derivate implicitly with respect to time on both sides of the equation:

Now we solve for the value of the speed of the top of the ladder, this is dT/dt:

The 2 cancels out:

Now we divide both sides by "T":

Now, since we determine the value of "T" from the Pythagorean theorem, we get:

Subtracting B squared from both sides:

Taking the square root:

Now we replace these values in the formula for the velocity:

Now we have an expression for the velocity of the top of the ladder. Replacing the given values:

Solving the operations we get:

Therefore, the speed of the top of the ladder is -0.47 feet per second.

Answer:

Distance and Mass

Explanation:

Answer:

ultraviolet light

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Answer:

Ultra violet

Explanation:

Answer:

\(19 \times 16000\)

According to the question,

We know,

→ \(Force = Mass\times Acceleration\)

By substituting the values, we get

           \(= 1600\times 19\)

           \(= 30400 \ N\)

Thus the above answer is right.

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Answer:

An object can become positively charged by losing electrons, but it cannot become positively charged by gaining protons. This is because the charge on an object depends on the balance of protons and electrons it has. Protons have a positive charge, while electrons have a negative charge. So, when an object gains electrons, it becomes negatively charged because it now has more negative charges than positive charges. On the other hand, when an object loses electrons, it becomes positively charged because it now has more positive charges than negative charges.

However, protons cannot be gained or lost easily because they are tightly bound within the atomic nucleus of an atom, and they are not free to move around like electrons. Therefore, the only way for an object to become positively charged is to lose electrons, not by gaining protons.

Explanation:

if the values of mass (m) and radius (R) are provided, the moment of inertia of the body about an axis through the center of disk A can be calculated as (3/2) * m * R^2, and the kinetic energy of the rotating body would be 162 * m * R^2 Joules.

To calculate the moment of inertia of the body about an axis through the center of disk A, we need to consider the moment of inertia contributions from each individual disk and add them up.

Let's denote the moment of inertia of each disk as I_A, I_B, and I_C, respectively. The moment of inertia of a disk rotating about its center can be calculated using the formula:

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

Where m is the mass of the disk and r is its radius.

Since the struts have negligible weight, we can assume that each disk has the same mass.

Let's assume the mass of each disk is m and the radius of each disk is R.

The moment of inertia of disk A (I_A) is given by:

I_A = (1/2) * m * R^2

The moment of inertia of disk B (I_B) and disk C (I_C) will be the same since they have the same mass and radius:

I_B = I_C = (1/2) * m * R^2

The total moment of inertia of the body about the axis through the center of disk A (I_total) is the sum of the individual moment of inertias:

I_total = I_A + I_B + I_C

= (1/2) * m * R^2 + (1/2) * m * R^2 + (1/2) * m * R^2

= (3/2) * m * R^2

To calculate the kinetic energy of the rotating body, we can use the formula:

Kinetic Energy = (1/2) * I_total * ω^2

Substituting the given values:

Kinetic Energy = (1/2) * ((3/2) * m * R^2) * (6.0 rad/s)^2

Simplifying further, if the values of m and R are given, we can calculate the moment of inertia and kinetic energy.

Assuming that the values of mass (m) and radius (R) are given, we can calculate the moment of inertia (I_total) and kinetic energy.

For the given values of ω = 6.0 rad/s and the previously calculated I_total:

I_total = (3/2) * m * R^2

Kinetic Energy = (1/2) * I_total * ω^2

= (1/2) * [(3/2) * m * R^2] * (6.0 rad/s)^2

= (9/2) * m * R^2 * (36.0 rad^2/s^2)

= 162 * m * R^2 Joules

Therefore, if the values of mass (m) and radius (R) are provided, the moment of inertia of the body about an axis through the center of disk A can be calculated as (3/2) * m * R^2, and the kinetic energy of the rotating body would be 162 * m * R^2 Joules.

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Answer:

B. 10 cm

x^3 = 1 L

1 L = 1000 cm^3 (since 1 L = 1000 cm^3)

x^3 = 1000 cm^3