A ball is launched upward at an angle.
The diagram shows its location at
1-second intervals.
Rank the three indicated locations
based on horizontal speed (Vx) and
vertical speed (Vy).

Answer:

1.33 mA

Explanation:

V=IR

I=10/(7.5×10³)

=1.33×10-³A

=1.33mA

a. The gravitational potential energy change is 449.105 kJ

b. The gravitational potential energy change is 449.105 kJ

Gravitational potential energy is the energy due to the position of an object. It is given by U = mgh where

Since the mountain is 2574 ft high, the gravitational potential energy change is given by ΔU = mg(h' - h) where

Substituting the values of the variables into the equation, we have

ΔU = mg(h' - h)

ΔU = 69 kg × 9.8 m/s²(784.56 - 120.40) m

ΔU = 69 kg × 9.8 m/s² × 664.16 m

ΔU = 449104.992 J

ΔU = 449.104992 kJ

ΔU ≅ 449.105 kJ

So, the gravitational potential energy change is 449.105 kJ

We know that the gravitational potential energy change is ΔU = U' - U = mg(h' - h) where

Substituting the values of the variables into the equation, we have

ΔU = U - U' = mg(h' - h)

ΔU = 0 - U' = 69 kg × 9.8 m/s²(784.56 - 120.40) m

ΔU = 69 kg × 9.8 m/s² × 664.16 m

ΔU = 449104.992 J

ΔU = 449.104992 kJ

ΔU ≅ 449.105 kJ

So, the gravitational potential energy change is 449.105 kJ

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Hi there!

1.

To find the maximum angle that the ramp can have, we must find the angle at which the net force on the wheelchair wheel along the axis of the plane is still 0 N.

We can do this using a summation of forces. The only two forces acting on the wheelchair wheel in this situation is the force due to STATIC friction and gravity:

⇒ Force due to static friction: Fs = μN

In this case, N = mgcosθ, so :
\(F_s = \mu mgcos\theta\)

⇒ Force due to gravity along the axis:
\(F_g = mgsin\theta\)

These two must sum up to zero, so:
\(\Sigma F = mgsin\theta - \mu mgcos\theta = 0 \\ \\ mgsin\theta = \mu mgcos\theta\)
Cancel the mass and gravity:
\(sin\theta = \mu cos\theta\\ \\ tan\theta = \mu \\ \\ tan\theta = 0.4\\ \\ tan^{-1}(0.4) = \boxed{21.80^o}\)

2.

Yes. The coefficient of static friction provides you with the MAXIMUM amount of friction force (resistance) that must be overcome for the object to begin moving, while the coefficient of kinetic friction allows you to find the friction force experienced by a MOVING object. In this instance, the coefficient of KINETIC friction is most appropriate because the wheelchair is moving on the ramp. However, if finding the maximum angle of a ramp with an object placed on it, the coefficient of STATIC friction would need to be used in determining the angle that will cause the object to begin sliding.

3.

A switch-back decreases the angle of inclination that a car must travel, so the risk of the car sliding down is decreased because as the angle DECREASES, the force due to friction INCREASES. Friction is what prevents a car from sliding, so minimizing the angle of a ramp/road will increase the friction force and lower the risk of sliding down.

According to the work-energy theorem, the work done on an object by a net force equals the change in kinetic energy of the object. Essentially kinetic energy is the energy used for motion. Interestingly, as work is done on an object, potential energy can be stored in that object. A moving object has kinetic energy because work has been done on it. When work is done energy in one form is transferred to the kinetic energy of the moving object. To stop the object again, the same amount of work would have to be done to bring it back to rest.

The initial velocity of the object in motion is determined as 19.8 m/s.

The initial velocity of the object in motion is calculated by applying the third equation of motion as follows;

v² = u² + 2gh

where;

when the object reaches maximum height, the final velocity, v = 0

The initial velocity of the object in motion is calculated as;

0 =  u² + 2 (-9,8ms²) x 20m​

0 =  u² - 392

u² = 392

u = √392

u = 19.8 m/s

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The initial height H of the boy can be determined by adding the height of the slide h and the horizontal distance d the boy travels after leaving the track: H = h + d.

To determine the initial height H of the boy in terms of h and d, we can use the principle of conservation of energy. The total mechanical energy of the system remains constant throughout the motion.

At the top of the slide, the boy has gravitational potential energy given by mgh, where m is the mass of the boy, g is the acceleration due to gravity, and h is the height of the slide above the ground.

As the boy slides down the slide, there is no friction or other dissipative forces, so there is no change in mechanical energy. At the bottom of the track, the gravitational potential energy is converted entirely into kinetic energy.

Therefore, we can equate the initial potential energy to the final kinetic energy:

mgh = 1/2 m\(v^{2}\),

where v is the horizontal velocity of the boy when he leaves the track.

Since the boy leaves the track horizontally, the vertical component of his velocity is zero. Therefore, we can use the relationship between horizontal distance d and horizontal velocity v:

d = vt.

Solving these equations, we can express the initial height H in terms of h and d:

H = h + d.

So the initial height H of the boy can be determined by adding the height of the slide h and the horizontal distance d the boy travels after leaving the track.G

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Answer:

\(9\:\mathrm{J}\)

Explanation:

Kinetic energy is given by the following equation:

\(KE=\frac{1}{2}mv^2\), where \(m\) is mass in \(\mathrm{kg}\) and \(v\) is velocity in \(\mathrm{m/s}\).

Since the cell phone's mass is given in grams, we need to convert this into kilograms:

\(80\:\mathrm{g}\cdot \frac{1\:\mathrm{kg}}{1000\:\mathrm{g}}=0.08\:\mathrm{kg}\).

Therefore, the kinetic energy of the cell phone is:

\(KE=\frac{1}{2}\cdot 0.08\cdot 15^2=\fbox{$9\:\mathrm{J}$}\).

Answer:

The plant growth height

Explanation:

Answer:

10 Newtons.

Explanation:

F=MA

F=(5kg)(2 m/s^2)

10 N

vi = initial speed = 75 miles/hour =167.7 m/s

vf = final speed = 25 miles/hour = 55.9234 m/s

t = time = 2.5 seconds=

a = acceleration

Replacing with the values given:

a = 44.74 m/s^2

a. The minimum force required to start moving the block is 9.8 N

b.  The force required to continue moving the block at a constant velocity is 5.88 N.

c. If a force greater than 9.8 N is applied, the block will start moving and continue to move until the applied force is less than 5.88 N.

a. Force = μs * N

N = m * g = 2.0 kg * 9.8 m/s^2 = 19.6 N

Force = μs * N = 0.50 * 19.6 N = 9.8 N

b. Force = μk * N = 0.30 * 19.6= 5.88 N N

c. In conclusion, If a force greater than 5.88 N is applied, the block will accelerate. If a force less than 5.88 N is applied, the block will decelerate and eventually stop if the force becomes less than the force of static friction (9.8 N).

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The East/West component of SuperPointParticleDog's force on the ball is -115.7 N. (Westward).

Isaac's force:

Magnitude: 255 N

Angle: 13 degrees North of East

x-component: 255*cos(13) = 245.1 N (Eastward)

y-component: 255*sin(13) = 58.1 N (Northward)

Newton's force:

Magnitude: 156 N

Angle: 34 degrees South of East

x-component: 156*cos(34) = 129.4 N (Westward)

y-component: 156*sin(34) = 86.5 N (Southward)

Now we can add the x- and y-components of the forces to find the net force:

Net force:

x-component: 245.1 N - 129.4 N = 115.7 N (Eastward)

y-component: 58.1 N - 86.5 N = -28.4 N (Southward)

The net force has an Eastward component of 115.7 N. Therefore, the East/West component of SuperPointParticleDog's force on the ball is -115.7 N. (Westward).

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The frequency of the sixth overtone would be 576 Hz.

To determine the length of a tube closed at one end, we can use the formula:

L = (v/4f) * (2n - 1)

where L is the length of the tube, v is the speed of sound in air, f is the fundamental frequency, and n is the harmonic number.

Given that the fundamental frequency is 96 Hz, we can substitute the values into the formula:

L = (v/4f) * (2n - 1)

L = (v/4*96) * (2*1 - 1)

L = v/384

To find the length at 0ºC, we need to know the speed of sound at that temperature. The speed of sound in air depends on temperature and other factors. At 0ºC, the speed of sound in dry air is approximately 331.4 m/s.

L = 331.4/384

L ≈ 0.862 m

Therefore, the tube closed at one end should have a length of approximately 0.862 meters when the air temperature is 0ºC.

To find the frequency of the sixth overtone, we multiply the fundamental frequency by six: Frequency of sixth overtone = 96 Hz * 6 = 576 Hz.

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The outdoor activities u prefers most is swimming because I feel relaxed after that.

The outdoor activities I am more interested in but I have not tried is mountain climbing.

Outdoor activities refers to exercises or activities that is carried out outside an enclosed areas. These include swimming, mountain climbing, running and the rest.

Therefore, The outdoor activities u prefers most is swimming because I feel relaxed after that.

The outdoor activities I am more interested in but I have not tried is mountain climbing.

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The correct answer is Self-critical.

Why is self-improvement?

Self-critical:

Self-critical causes them to always strive for self-improvement and never to see accomplishing a goal as good enough.

The characteristic of a turbulent person causes them to always strive for self-improvement and to never see accomplishing a goal as good enough is Self-critical.

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To solve this problem, we can use the equations of motion for a freely falling body with constant acceleration due to gravity (g = 9.81 m/s²).

a. The time for which it is above a height of 63m:

We can use the following equation of motion to find the time t it takes for the particle to reach a height of 63 m above the ground:

y = uyt + (1/2)gt²

where y is the displacement (height) of the particle, uy is the initial velocity in the y-direction (upward), and t is the time.

At the highest point of its trajectory, the particle will have zero velocity, so we can use the initial velocity as uy = 36 m/s. We want to find the time t when the particle reaches a height of y = 63 m, so we can rearrange the equation to solve for t:

t = (-uy ± sqrt(uy² + 2gy))/g

where the ± sign indicates that there are two possible solutions, one for when the particle is going up (positive root) and one for when the particle is coming down (negative root).

Plugging in the values for uy, g, and y, we get:

t = (-36 ± sqrt(36² + 2*(-9.81)*63))/(-9.81)

t = 6.53 s (upward)

b. The speed which it has at this height on its way down:

When the particle reaches a height of 63 m on its way down, we can use the following equation to find its velocity vy:

vy² = uy²+ 2g(y - yo)

where yo is the initial height (0 m) and uy is the initial velocity in the y-direction (upward).

We can plug in the values for uy, g, and y, and solve for vy:

vy²= 36²+ 2(-9.81)(63 - 0)

vy = 32.2 m/s (downward)

c. The total time of flight:

The total time of flight is twice the time it takes for the particle to reach the maximum height, since it takes the same amount of time to come back down to the ground. Therefore, the total time of flight is:

t_total = 2t_upward = 2(6.53) = 13.06 s

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Answer:

Which feature is created when a block of rock dropped down in relation to the block of rock beside it?

Explanation:

Grabens drop down relative to adjacent blocks and create valleys. Horsts rise up relative to adjacent down-dropped blocks and become areas of higher topography.

Answer:

A RECIPE NEEDS A COMBINED WEIGHT OF 720G OF FLOUR AND SUGAR. IF THE RECIPE NEEDS 5TIME FLOUR THAN SUGAR,HOW MUCH OF EACH IS NEEDED

The pathogen that immunization helps to prevent is virus.

To reduce the risk of atherosclerosis cut down on saturated fatty foods.

Immunization is defined as the prevention of pathogenic viral organisms from harming a living human host through the exposure of the host to an attenuated form of the virus to develop immunity prior to a future exposure.

Atherosclerosis is the deposition of fatty substances on the arterial wall leading to blocking of the blood vessels.

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Answer:

Explanation:

According to Newton's Law of Gravitation, the gravitational force between two objects is always mutual, meaning that the force that one object exerts on the other is equal in magnitude but opposite in direction.

This means that if planet A exerts a gravitational force on planet B, then planet B will also exert a gravitational force on planet A. The magnitude of this force will be equal to the magnitude of the force that planet A exerts on planet B, but the direction will be opposite.

For example, if planet A exerts a gravitational force on planet B that is pulling planet B towards planet A, then planet B will also exert a gravitational force on planet A that is pulling planet A towards planet B. The magnitude of these two forces will be equal, but the directions will be opposite.

hat he sais

Answer:w

Explanation:

Answer:

they are prob really curious its new to them

Explanation:

this is most likely not right but ia m a freash man so whatever

Watching Gladiators was a a favorite pastime of Roman civilization. It was a game based on the Roman martial ethics. It lasted for nearly thousands of years. Hence option C is correct.

An armed warrior known as a gladiator amused spectators in the Roman Republic and Roman Empire by engaging in bloody fights with other gladiators, wild animals, and condemned prisoners.

Some gladiators were unpaid volunteers who jeopardized their lives as well as their position in society and the law by participating in the fight. The majority endured severe education, were treated like inferiors in society, and were separated even in death.

Regardless of where they came from, gladiators served as a living example of Rome's martial virtues to onlookers, and by fighting or dying honorably, they may win adulation and widespread renown.

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If a wave has an amplitude of 0.0800 m and is moving 7.33 m/s. The

wavelength of the wave is 1.69m.

The wavelength of a wave can be determined using the equation:

Wavelength = velocity / frequency

To determine the frequency we need to calculate the reciprocal of the time it takes for one complete oscillation.

frequency = 1 / time

frequency = 1 / 0.230

frequency ≈ 4.35 Hz

Substitute the values into the wavelength equation:

wavelength = velocity / frequency

wavelength = 7.33 / 4.35

wavelength ≈ 1.69m

Therefore the wavelength of the wave is approximately 1.69 meters.

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Answer:

The delicate balance between temperature and magnetic domains is destabilized when a magnet is subjected to high temperatures. If a magnet is exposed to this temperature for an extended length of time or heated over its Curie temperature, it will lose its magnetism and become irreversibly demagnetized.

Explanation:

A biome, in simple terms, is a set of ecosystems sharing similar characteristics with their abiotic factors adapted to their environments.

Answer:

the frequency of the second harmonic of the pipe is 425 Hz

Explanation:

Given;

length of the open pipe, L = 0.8 m

velocity of sound, v = 340 m/s

The wavelength of the second harmonic is calculated as follows;

L = A ---> N   +  N--->N   +   N--->A

where;

L is the length of the pipe in the second harmonic

A represents antinode of the wave

N represents the node of the wave

\(L = \frac{\lambda}{4} + \frac{\lambda}{2} + \frac{\lambda}{4} \\\\L = \lambda\)

The frequency is calculated as follows;

\(F_1 = \frac{V}{\lambda} = \frac{340}{0.8} = 425 \ Hz\)

Therefore, the frequency of the second harmonic of the pipe is 425 Hz.

The frequency of the second harmonic of the pipe is 425 Hz.

Frequency is the number of oscillations per second in the sinusoidal wave.

Given is length of the open pipe, L = 0.8 m, and velocity of sound, v = 340 m/s

The wavelength of the second harmonic is represented as

L = A → N   +  N→N   +   N→A

where, L is the length of the pipe in the second harmonic, A represents antinode of the wave, N represents the node of the wave

Length = λ/4 +λ/2 +λ/4

Length = λ

The frequency is calculated

frequency = speed of light / wavelength

Put the values, we get

f = 340/0.80

f = 425 Hz

Therefore, the frequency of the second harmonic of the pipe is 425 Hz.

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Answer:

https://www.ux1.eiu.edu/~cfadd/1350/Hmwk/Ch08/Ch8.html

Explanation:

Answer: B.

Explanation:

An isotope is a variation of the same element with a different number of neutrons in its nucleus. The only thing that changes is the top component, which is the total number of protons and neutrons. The bottom component remains the same (the number of protons).

Answer:

Explanation:

Wavelength = 100m. Speed = V. 2.) Frequency = 20 Hz. Wavelength = 200 m. Speed = ... 2=1.7m. F=Y/2 f=2×10. 5.) Wavelength = 502 km. Speed= 100 m/s.