Why do humans to experience the four seasons

Answer:

Explanation:

Pecan 1 and 4 seem the best answer

Answer:

Tension, Ft = 79.91 N

Explanation:

The tension in the string is the resultant force that exists in the string due to the centripetal effect of the swinging ball.

From conservation laws, the tension in the string will be equals to the centripetal force acting on the string.

The tension in a string can be obtained using the formula:

[tex]T=mv^2/R[/tex]

where v = linear velocity of the metal ball which equals to the angular velocity of the ball X the radius of the ball.

The radius of the ball is given as 72 cm = 0.72m and the angular velocity = 1.02 rad/second.

Therefore, linear velocity, [tex]v = 2\pi \times 1.02\times 0.72 =4.616m/s[/tex]

The tension in the string will now be equals to [tex]2.7 \times 4.616^2 /0.72 =79.91N[/tex]

Answer:

1176N

Explanation:

Given parameters:

Mass of bench  = 100kg

Forward force  = 980N

Coefficient of static friction = 0.2

Acceleration  = 1.84m/s²

Unknown:

Magnitude of the applied force  =?

Solution:

Frictional force is a force that opposes motion, for a body to move, the applied force must be greater than the frictional force;

The Force applied;

  Force applied  = Frictional force + Weight of the body

   Frictional force  = umg

     u is the coefficient of static friction

      m is the mass

        g is the acceleration due to gravity

    Force applied  = 0.2 x 100 x 9.8 + 980 = 1176N

Answer:

0.5625 Joules

Explanation:

The equation to calculate kinetic energy is:

[tex]KE = \frac{1}{2}mv^2[/tex]

So, plug in all given info and calculate:

[tex]KE = \frac{1}{2}(0.5)(1.5)^2 = 0.5625J[/tex]

And that's your answer! :)

Answer:

7.35m/s²

Explanation:

From the question we are not told what to find but we can as well find the acceleration of the wagon.

According to newton second law of motion

[tex]\sum F_x = ma_x\\Fm - Ff = ma_x\\Fm - \mu R = ma_x\\Fm- \mu mg = ma_x\\[/tex]

Fm is the moving force = 410N

[tex]\mu[/tex] is the coefficient of friction = 0.18

m is the mass = 45kg

g is the acceleration dur to gravity = 9.8m/s²

a is the acceleration of the wagon

Substitute the given data into the equation ang get ax

[tex]Fm- \mu mg = ma_x\\410 - (0.18)(9.8)(45) = 45a_x\\410 - 79.38 = 45a_x\\330.62 = 45a_x\\a_x = 330.62/45\\a_x = 7.35m/s^2\\[/tex]

Hence the acceleration of the wagon is 7.35m/s²

Answer:

Facilitated diffusion and active transport both utilize proteins to transport substances across membranes. Differences between active transport and facilitated diffusion 1. Active transport requires an input of energy, usually ATP, while facilitated transport does not.

Answer:

For Bill to dump the water on Tim, Tim should be 7.232 meters from the tree when Bill dumps the water

Explanation:

The given height above the ground at which Bill sits on the tree branch with a bucket of water, h = 4.0 meters

The speed with which Tim is approaching the tree = 8.0 meters per second

The time , t, it will take for the bucket of water to reach the ground is given by the equation of free fall as follows;

h = 1/2·g·t²

Where;

h = Height = 4.0 m

g = The acceleration due to gravity ≈ 9.8 m/s²

t = The time

Making t the subject of the above equation gives;

t = √(h/(1/2·g))

Substituting the known values gives;

t = √(4.0 m/(1/2 × 9.8 m/s²)) ≈ 0.904 s

t ≈ 0.904 seconds

Therefore, for Bill to dump the water on Tim, it should take Tim approximately 0.904 seconds to get to the tree

The distance, d, Tim will be when it will take him 0.904 seconds to get to the tree is given from the kinematic equation of speed, s, as follows;

Distance, d = Time, t × Speed, s

Where;

d = The distance

t = The time = 0.904 s

s = The speed with which Tim is approaching the tree = 8.0 m/s

Substituting the values gives;

d = 0.904 s × 8.0 m/s = 7.232 m

Therefore, the distance Tim should be when Bill throws the water = 7.232 meters

Answer:

The answer is below

Explanation:

A vector quantity is a quantity that has both magnitude and direction. The magnitude of a vector is the length of that vector.

The magnitude of a vector a with a x component of x and y component of y is given by the formula:

[tex]|a|=\sqrt{x^2+y^2}[/tex]

Given that the vector has a magnitude of √8, the x component is 2 and the y component = y. Hence:

[tex]\sqrt{8}=\sqrt{2^2+y^2}\\\\squaring\ both\ sides:\\\\8=4 + y^2\\\\y^2=8-4\\\\y^2=4\\\\square\ root\ of\ both\ sides:\\\\y=\sqrt{4} \\\\y=\pm 2\\\\y=+2\ or\ y=-2[/tex]

Answer:

because the light is refracted and slowed down to make us see the color "green"  and the things we see..like paper..the color "green" A white sheet of paper reflects almost all the light that falls on it. It reflects white light because it can reflect all the colors of the spectrum that comprise white light. If red light only is shone onto a white page, the red light is reflected. If the green light is shone onto the page, the green light is reflected.

Explanation:

hope this helps?

Answer:

the wave length that are reflected  determine the color  that an object appears  to the human eye. for example,the leaves appear green because  they reflect green light and absorb light of other  wavelengths.This means that  the light passes through the material rather than being reflected by it.

Explanation:

Answer: Wavelength is the measure of the length of a complete wave cycle. The velocity of a wave is the distance traveled by a point on the wave. In general, for any wave the relation between Velocity and Wavelength is proportionate. It is expressed through the wave velocity formula.

Explanation: For any given wave, the product of wavelength and frequency gives the velocity. It is mathematically given by wave velocity formula written as-

V=f×λ

Where,

V is the velocity of the wave measure using m/s.

f is the frequency of the wave measured using Hz.

λ is the wavelength of the wave measured using m. Velocity and Wavelength Relation

Amplitude, Frequency, wavelength, and velocity are the characteristic of a wave. For a constant frequency, the wavelength is directly proportional to velocity.

Given by:

V∝λ

Example:

For a constant frequency, If the wavelength is doubled. The velocity of the wave will also double.

For a constant frequency, If the wavelength is made four times. The velocity of the wave will also be increased by four times.

Hope you understood the relation between wavelength and velocity of a wave. I truely hope this helps you out tho! Goodluck!

Answer:

9.95 percent

Explanation:

To get the percentage error, we use the following formula:

Percentage error = (expected output- actual output)/expected output  X 100

Where

expected output: This is the mass of the end product after the chemical reaction that was expected = 171.9g

actual output: This is the mass of the end product after the chemical reaction that was observed = 154.8 g

Percentage error = [tex]\frac{171.9-154.8}{171.9} X 100= 9.95 percent[/tex]

Therefore the percentage error in the experiment is 9.95 percent.

The percent error for this experiment in which the reaction takes place to yield 171.9 g of product is 9.95%.

The difference between the measured or calculated value during the experiment or calculating and the known value is called the error. The percentage of error is the 100 times of this difference when divided with known value.

The expected value of the reaction to yield is 171.9 g of product. The experimental value of the reaction to yields is 154.8 g of product.  

Thus, the percent error for this experiment

[tex]P=\left(\dfrac{171.9-154.8}{171.9}\right)\times100\\P=9.95\%[/tex]

Thus, the percent error for this experiment in which the reaction takes place to yield 171.9 g of product is 9.95%.

Learn more about the percentage of error here;

https://brainly.com/question/10218601

Answer:

[tex]\boxed {\boxed {\sf 6 \ meters \ per \ second}}[/tex]

Explanation:

Speed can be found by dividing the distance by the time.

[tex]s=\frac{d}{t}[/tex]

The distance is 18 meters and the time is 3 seconds.

[tex]d= 18 \ m \\t= 3 \ s\\[/tex]

Substitute the values into the formula.

[tex]s=\frac{18 \ m }{ 3 \ s }[/tex]

Divide.

[tex]s= 6 \ m/s[/tex]

The speed of the puck is 6 meters per second.

Answer:

Speed

As we know that

[tex] \sf Speed = \dfrac{Distance}{Time} [/tex]

[tex] \sf \: Speed = \dfrac{18}{3} [/tex]

Cancelling both by 3

[tex] \sf \: Speed = 6 \: mps[/tex]

Answer:

[tex]\huge\fcolorbox{black}{pink}{Answer}[/tex]

Because said machines have to operate in the physical world with constraints caused by the laws of physics. It’s not possible to do useful work without encountering some of these issues. The mains ones are:

[tex]\sf\blue{hope\:it\:helps}[/tex]

Answer:

c

Explanation:

Answer:

What is quantum physics? Put simply, it's the physics that explains how everything works: the best description we have of the nature of the particles that make up matter and the forces with which they interact. Quantum physics underlies how atoms work, and so why chemistry and biology work as they do.

Answer:

Democritus and Dalton has similar ideas about the atom, but Democritus based his theory more on reason than science. ... His ideas were similar to those of Democrites in that he believed that atoms were indivisible and that atoms of one substance are all alike but are different from atoms of another substance.

Explanation:

PLS MAKE ME AS BRAINLIST

Answer:

Democritus and Dalton has similar ideas about the atom, but Democritus based his theory more on reason than science. ... His ideas were similar to those of Democrites in that he believed that atoms were indivisible and that atoms of one substance are all alike but are different from atoms of another substance.

Explanation:

Answer:

Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.

Answer:

here are six stages within each of the divisions, namely prophase, prometaphase, metaphase, anaphase, telophase and cytokinesis

Explanation:

Explanation:

sorry but Oz is the option or anything else can clarify

Engineers have developed solar energy technology that reduces the need for other sources of energy that can pollute the atmosphere. So, option C.

Solar energy is defined as the solar radiation that has the potential to ignite chemical processes, produce heat, or generate electricity.

Here,

In order to protect wildlife, and ecosystems, it is imperative that greenhouse gas emissions are reduced and climate change is mitigated. Solar energy plays a significant part in this as a renewable source of energy.

Additionally, solar energy can reduce water use in energy production and enhance air quality.

An extremely crucial factor considering the scarcity of water is that solar energy does not produce waste or contaminate water. Wind energy is essential for preserving hydrological resources because it consumes among the least amounts of water compared to fossil fuels and nuclear power facilities.

Hence,

Engineers have developed solar energy technology that reduces the need for other sources of energy that can pollute the atmosphere. So, option C.

To learn more about solar energy, click:

https://brainly.com/question/9704099

#SPJ2

Complete Question

A 75 kg man and a 100. Kg woman are playing tug of war on a frictionless surface. The man accelerates toward the woman at 2.0 m/s2.How much force does she use to pull on the rope

Answer:

The value is  [tex]F = 150 \ N[/tex]

Explanation:

From the question we are told that

    The mass of the man is  [tex]m_m = 75 \ kg[/tex]

     The mass of the woman is  [tex]m_f = 100 \ kg[/tex]

     The acceleration of the man is  [tex]a_m = 2.0 \ m/s ^2[/tex]

Generally the force which she used to pull the rope is mathematically represented as  

           [tex]F = m * a[/tex]

=>         [tex]F = 75 * 2[/tex]

=>         [tex]F = 150 \ N[/tex]

Answer:

wouldn't they be dead and there's no oxygen in space....right???

Answer:

no gravity and no oxygen

Explanation:

the bird would die of lack of oxygen before they're even able to fly, but they can't fly anyway because there's no gravity so they'd just float

Answer:

Point D

Explanation:

The epicenter of a hypothetical earthquake is located at the point where the earthquake begins.

(See the attached image).

Hope it helps!

Answer:

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass in kg

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question

750 g = 0.75 kg

We have

PE = 0.75 × 9.8 × 3

We have the final answer as

Hope this helps you

Answer:nuclear membrane

Explanation:

Answer:

Nuclear envelope. Hope this helps.

Answer:

I'm thinking Newton's first law of motion.

Explanation:

"An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force."