please help!!!!!!!!!!

Answer:

e

Explanation:

e

Answer:

Exercise 1;

The centripetal acceleration is approximately 94.52 m/s²

Explanation:

1) The given parameters are;

The diameter of the circle = 8 cm = 0.08 m

The radius of the circle = Diameter/2 = 0.08/2 = 0.04 m

The speed of motion = 7 km/h = 1.944444 m/s

The centripetal acceleration = v²/r = 1.944444²/0.04 ≈ 94.52 m/s²

The centripetal acceleration ≈ 94.52 m/s²

Answer:

LAST ONE

Explanation:

Answer:

Coral reefs and sandbars create lagoons.

Explanation:

"The combination of coral growth and water creates a lagoon. It may take as long as 300,000 years for an atoll formation to occur. Coastal lagoons form along gently sloping coasts. They are generally shallower than atoll lagoons and tend to be separated from the ocean by an island, reef, or sand bank." I got my information from google :)

Hope this helps :))))

Answer:

The acceleration is 8 m/s²

Explanation:

The given parameters are;

The initial velocity, u = 2 m/s

The final velocity, v = 6 m/s

The distance the acceleration took place, s = 2 m

The acceleration, a, can be found from the following kinematic equation;

v² = u² + 2·a·s

By substituting the values, we have;

6² = 2² + 2 × a × 2

6² - 2² = 2 × a × 2

32 = 4·a

a = 32/4 = 8 m/s²

The acceleration, a, of the given motion = 8 m/s².

Answer: a

Explanation:

cause i took a test and that is what my science teacher said

Option A - The gravitational potential energy is the same for all of the hikers is correct.

We have three hikers who took three different paths to the top of a mountain labelled as paths 1, 2, and 3. The hikers are all the same height and weight.

We have to find which hiker will have the greatest amount of gravitational potential energy at the top.

The formula to calculate the gravitational potential energy is -

U (h) = mgh

In the question given to us -

Mass of each hiker is same = m kg

Height of each hiker at top is same = h meters

The gravitational Potential Energy of a body is independent of the path taken. Since the mass and height of each hiker is same, therefore -

U (h[1]) = U(h[2]) = U(h[3]) = mgh

Hence, Option A is correct.

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#SPJ2

Answer: Use the x/t = v formula!!! x is distance, t is time, and v is velocity. you just need to do 40 / 5 = 8 and 100 / 15 = 6.66

Answer:

It would be PE=16kg * 9.8 m/s^2 * 1m = 160 J

Explanation:

The person who asked this question ended up answering his own question so I'm here to let you know all that the answer was founded by the person whos posted the question himself full credit goes to him :)

Answer: "For a projectile with no air resistance, at the peak of its path, it's velocity is equal to zero"

Explanation:

Suppose that you throw an object up. The initial vertical velocity will be positive, and the acceleration (the gravitational acceleration) will point downwards, meaning that it opposes to the initial direction of the velocity, and that decreases the velocity as the time goes by.

There will be a point where the velocity ( that was positive until now, so until now the height of the object was increasing), is equal to zero, this means that at this moment the object stops moving, and after, because we still have negative acceleration, the velocity will start become negative, and the object will fall down.

Then that point where the velocity was zero is the peak of its path, then we can conclude that:

"For a projectile with no air resistance, at the peak of its path, it's velocity is equal to zero"

A maritime polar air mass has relatively higher moisture and is relatively cooler than the tropical air mass.

Maritime polar (mP) is cold but moist due to its origination over the oceans. The desert region air masses (hot and dry) are designated by ‘cT’ for ‘continental tropical’. As these air masses move around the earth they can begin to acquire additional attributes.

The continental Tropical (cT) air mass originates in arid or desert regions in the middle or lower latitudes, principally during the summer season. It is strongly heated in general, but its moisture content is very low.

Continental tropical air masses are extremely hot and dry. Arctic, Antarctic, and polar air masses are cold. The qualities of arctic air are developed over ice and snow-covered ground. Arctic air is deeply cold, colder than polar air masses

Maritime Polar (mP) air masses develop over the polar areas of both the Northern and the Southern hemispheres. They generally contain considerably more moisture than the cP air masses. As they move inland in middle and high latitudes, heavy precipitation may occur.

Learn more about air masses:

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Answer:

increase distance

Explanation:

Inclined planes make it easier to move objects to a higher elevation. The sloping surface of the inclined plane supports part of the weight of the object as it moves up the slope. As a result, it takes less force to move the object uphill.

Answer:

Hello your answer would be increase of distance

Explanation:

I know that because than you would have to go upward with the object.

Answer:

The object takes approximately 1.180 seconds to complete one horizontal circle.  

Explanation:

From statement we know that the object is experimenting an Uniform Circular Motion, in which acceleration ([tex]a[/tex]), measured in meters per square second, is entirely centripetal and is expressed as:

[tex]a = \frac{4\pi^{2}\cdot R}{T^{2}}[/tex] (1)

Where:

[tex]T[/tex] - Period of rotation, measured in seconds.

[tex]R[/tex] - Radius of rotation, measured in meters.

If we know that [tex]a = 26.36\,\frac{m}{s^{2}}[/tex] and [tex]R = 0.93\,m[/tex], then the time taken by the object to complete one revolution is:

[tex]T^{2} = \frac{4\pi^{2}\cdot R}{a}[/tex]

[tex]T = 2\pi\cdot \sqrt{\frac{R}{a} }[/tex]

[tex]T = 2\pi\cdot \sqrt{\frac{0.93\,m}{26.36\,\frac{m}{s^{2}} } }[/tex]

[tex]T \approx 1.180\,s[/tex]

The object takes approximately 1.180 seconds to complete one horizontal circle.  

Answer:

His initial velocity (speed) must be 64.16 m/s.

Explanation:

Horizontal Motion

When an object is horizontally launched at a speed v from a height h, the maximum horizontal distance (also called Range) traveled by the object can be calculated as follows:

[tex]\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}[/tex]

Our daredevil is attempting to clear a river d=420 m wide with his motorcycle from a cliff h=210 m high. We need to find the speed needed to safely reach the opposite edge of the river.

From the above equation, we solve for v:

Speed:

[tex]\displaystyle v=d\cdot\sqrt{\frac {g}{2h}}[/tex]

[tex]\displaystyle v=420\cdot\sqrt{\frac {9.8}{2\cdot 210}}[/tex]

[tex]\displaystyle v=420\cdot\sqrt{\frac {9.8}{420}}[/tex]

v = 64.16 m/s

His initial velocity (speed) must be 64.16 m/s.

Answer:

mechanical energy is due to the position and the motion of an object  in a system. A projectile moves in a curve. When the object leaves, it has mostly kinetic energy

Explanation:

On a swing, the ride starts with a push, giving you kinetic energy.

When the pendulum swings, its potential energy transforms into kinetic energy.While projectile energy transforms from kinetic energy to potential energy.

Swinging from a pendulum, such as a rope swing or a hanging vine, is more difficult than swinging from a cannonball projectile.

A type of motion in which an item moves along a bilaterally symmetrical, parabolic direction is known as projectile motion.

The path that the item takes is referred to as its trajectory. Projectile motion occurs only when a single force is supplied at the start of the trajectory, after which the only interference comes from gravity.

Because gravity is the sole force acting on a projectile while it is in the air, the total energy does not vary at any point in its travel,

The energy can change forms from kinetic energy, The energy of motion, to potential energy, or from potential energy to kinetic energy.

When the pendulum swings, its potential energy transforms into kinetic energy, which is then converted back to potential energy, which is then converted back to kinetic energy, and so on.

Let's try it with a tire swing as a pendulum to see how it works! All of the swing's mechanical energy is potential energy at its beginning location.

Hence when the pendulum swings, its potential energy transforms into kinetic energy. While projectile energy transforms from kinetic energy to potential energy.

To learn more about the swing refer to the link;

https://brainly.com/question/1230851

Answer:

340m/s

Explanation:

Given parameters:

Wavelength  = 2m

Frequency   = 170Hz

Unknown:

Velocity of the wave  = ?

Solution:

The velocity of the wave is the product of frequency and wavelength of the wave;

          V  = F λ

V is the velocity

 F is the frequency

λ is the wavelength

  Insert the parameters and solve;

          V = 2  x 170 = 340m/s

The velocity of the wave with the given wavelength and frequency is 340m/s.

Given the data in the question;

Velocity; [tex]v =\ ?[/tex]

To determine the velocity of the wave, we use the expression for the relations between wavelength, frequency and speed.

[tex]\lambda = \frac{v}{f}[/tex]

Where [tex]\lambda[/tex] is wavelength, f is frequency and v is speed.

We substitute our given values into the equation

[tex]2m = \frac{v}{170s^{-1}}\\\\v = 2m * 170s^{-1}\\\\v = 340m/s[/tex]

Therefore, the velocity of the wave with the given wavelength and frequency is 340m/s.

Learn more: https://brainly.com/question/14355634

Answer: mass

Explanation:

i remember my teacher saying it lol

A rifle recoils from firing a bullet. The speed of the rifle’s recoil is small compared to the speed of the bullet because the rifle has a great deal more mass than the bullet.

Mass is a numerical measure of inertia, which is a basic feature of all matter. It is, in effect, a body of matter's resistance to a change in speed or position caused by the application of a force.

In the International System of Units (SI), the kilogram is the unit of mass.

A rifle recoils from firing a bullet. The speed of the rifle’s recoil is small compared to the speed of the bullet because the rifle has a great deal more mass than the bullet.

Hence d is the correct option.

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Answer: -.80m/s

Explanation:

Answer:

this is in the middle of the wheel and helps it rotate it is an axle

Answer:

Explanation:

Given

Force = 8N

Direction = N50°E

Required

x component of the Force

Fx = F cos theta

Fx = 8cos 50°

Fx = 8(0.6428)

Fx = 5.1423N

Hence the x component of the force is 5.1423N

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction. Explanation:

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction

Explanation:

In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.

Answer:

I think white is the colour of star A.

Answer:

yellow

Explanation:

Answer:

the time comes eventually.

Explanation:

ur body just be giving up

Answer:

A planet's orbital speed changes, depending on how far it is from the Sun. The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it, and the faster the planet moves.

Explanation: hope that helps :)

Answer:

Option D (On the...............dominate) would be the right approach.

Explanation:

The Gravitational constant (G) will be:

= [tex]6.67\times 10^{-11}[/tex]

The Coulomb's law constant (K) will be:

= [tex]9\times 10^9[/tex]

⇒ [tex]\frac{f_e}{f_g}\sim 10^{42}[/tex]

The latter three choices aren't connected to either the situation mentioned in the clarification segment elsewhere here.

The statement that provides evidence that there must be at least two types of electrical charge, but that there is only one type of mass is that on the scale of the solar system, electric forces cancel out and gravitational forces dominate.

The examples that provides conclusive evidence of is option d because the Gravitational constant is (G)=6.67*10-11 while the Coulomb's law constant(K)=9*109.

The interaction between charged objects is regarded as a non-contact force that acts over some distance of separation.

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Answer: So if the steady easterly wind of 19 m/s begins to blow more than the 10 m/s it just needs more wind and direction So the resultant has to be 29 m/s east.

Answer:

When same-sized team members are placed on each side of the rope, the sizes of the arrows on both sides remain the same.

Explanation:

This is the answer on Plato

Answer:

When same-sized team members are placed on each side of the rope, the sizes of the arrows on both sides remain the same.

Explanation:

Gravitational potential energy is the energy stored in an object as the result of its vertical position or height. It can be calculated as its weight times the height. This is:

[tex]\boxed{U_g=W\cdot h=mgh}[/tex]

Where:

Evaluating:

[tex]U_g = (0.145\;kg)(9.8\;m/s^2)(2.50\;m)\\\\\boxed{U_g=3.5525\;J}[/tex]

R/ The ball has 3.5525 J of potential energy.