a golf ball stays on the tee until the golf club hits it. which of the following principles best describes why this occurs?

Answer:

the last option is correct

Explanation:

see I won't explain all the points but will tell you the concept being used.

since, the rest of the options are violating the above rules they're incorrect

Acceleration of the skydiver during the free fall is 4.13 m/s².

1) Mass of the skydiver, m = 83 kg

Weight, W = mg = 83 x 9.8

W = 813.4 N

Free fall acceleration is the acceleration that a body travelling in free fall experiences due to only the gravitational pull of the earth. This is the acceleration brought on by gravity.

Since there is no air resistance, the acceleration of the skydiver during the free fall is the acceleration due to gravity, g.

Freebody diagram is given in Fig.1.

2) Mass of the skydiver, m = 78 kg

Air resistance acting on him, F' = 470 N

mg - 470 = ma

813.4 - 470 = ma

a = 343.4/83

a = 4.13 m/s²

Freebody diagram is given in fig.2.

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i. \(T = 36.8\:\text{N}\)

ii. \(a = 2.45\:\text{m/s}^2\)

iii. \(x = 1.23\:\text{m}\)

Explanation:

Let's write Newton's 2nd law for each object. We will use the sign convention assigned for each as indicated in the figure. Let T be the tension on the string and assume that the string is inextensible so that the two tensions on the strings are equal. Also, let a be the acceleration of the two masses. And \(m_1 = 3\:\text{kg}\) and \(m_2 = 5\:\text{kg}\)

Forces acting on m1:

\(T - m_1g = m_1a\:\:\:\:\:\:\:(1)\)

Forces acting on m2:

\(m_2g - T = m_2a\:\:\:\:\:\:\:(2)\)

Combining Eqn(1) and Eqn(2) together, the tensions will cancel out, giving us

\(m_2g - m_1g = m_2a + m_1a\)

or

\((m_2 - m_1)g = (m2 + m_1)a\)

Solving for a,

\(a = \left(\dfrac{m_2 - m_1}{m_2 + m_1}\right)g\)

\(\:\:\:\:= \left(\dfrac{5\:\text{kg} - 3\:\text{kg}}{5\:\text{kg} + 3\:\text{kg}}\right)(9.8\:\text{m/s}^2)\)

\(\:\:\:\:= 2.45\:\text{m/s}^2\)

We can solve for the tension by using this value of acceleration on either Eqn(1) or Eqn(2). Let's use Eqn(1).

\(T - (3\:\text{kg})(9.8\:\text{m/s}^2) = (3\:\text{kg})(2.45\:\text{m/s}^2)\)

\(T = (3\:\text{kg})(9.8\:\text{m/s}^2) + (3\:\text{kg})(2.45\:\text{m/s}^2)\)

\(\:\:\:\:= 29.4\:\text{m/s}^2 + 7.35\:\text{m/s}^2 = 36.8\:\text{N}\)

Assuming that the two objects start from rest, the distance that they travel after one second is given by

\(x = \frac{1}{2}at^2 = \frac{1}{2}(2.45\:\text{m/s}^2)(1\:\text{s})^2 = 1.23\:\text{m}\)

If the resistance in a circuit is 1 plus j 3 ohms and the current in the circuit is 2 minus j 5 amps. The voltage in the circuit is 17 + j volts.

To find the voltage in the circuit, we can use Ohm's Law which states that voltage (V) is equal to current (I) times resistance (R): V = IR.

In this case, we have a complex number for both the current and the resistance, so we need to perform complex multiplication to obtain the voltage.

First, we will convert the current and resistance into rectangular form (real and imaginary parts):

I = 2 - j5 = 2 - 5j

R = 1 + j3

Next, we multiply I and R together to get the voltage:

V = IR = (2 - 5j)(1 + j3)

V = 2 + 6j - 5j - 15j^2

V = 2 + j - 15(-1) (since j^2 = -1)

V = 17 + j volts

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Sentences 20, 21, 22, and 23 can be completed as follows:

20. B. Ultraviolet is used to observe star birth and far away galaxies.

21.  D. Radio waves is used to observe the depths of the Milky Way galaxy.

22. C. Gamma rays are used to observe supernova explosions and radioactive decay.

23. C. Wernher von Braun developed the V-2 rocket.

Rays are beams of light and radiation that can be harmful when used wrongly or advantageous for scientific purposes.

As scientists study extraterrestrial bodies, they often have to use rays for their findings. Gamma rays are known for their use in observing supernova explosions. Also, Wernher Braun is attributed to the development of the V-2 rocket.

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Answer:

F = 2389.603 N

Explanation:

Given:

Mass m = 1,369.4 kg

Initial velocity u = 28.9 m/s

Final velocity v = 20 m/s

Time t = 5.1 s

Find:

Net force

Computation:

a = (v - u)/t

a = (20 - 28.9)/5.1

a = -1.745 m/s²

F = ma

F = (1369.4)(1.745)

F = 2389.603 N

Answer:

1.32

Explanation:

Index of refraction of the glass = 1.52

Thickness = 104 nm

Length = 550 nm

 Using formula of index

n = L/4t

Where, L = length

t = thickness

Substituting the values into the formula we get

n = 500/(4×104)

n= 1.32

Hence, The index of refraction of the coating  is 1.32.

Flashlight: The flashlight typically uses multiple batteries, arranged in series to provide a higher voltage output.

In continuation, The number and type of batteries used in a flashlight can vary depending on the model, but a common arrangement is to use two or three 1.5V AA batteries. The batteries are connected in series, with the positive end of one battery connected to the negative end of the next battery, and so on.

Secondly, 2-way radio:

A 2-way radio also typically uses multiple batteries, arranged in series to provide a higher voltage output. Again, the number and type of batteries used can vary depending on the model, but a common arrangement is to use four or six 1.5V AA batteries. The batteries are connected in series, with the positive end of one battery connected to the negative end of the next battery, and so on.

Therefore, Note that the arrangement of batteries in series increases the total voltage produced by the batteries.

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Answer:

Human development option D

Answer:

Total speed of the insect as seen by a person standing on the side of the road is 22 m/s

Explanation:

There i a composition of velocities, since the air inside the bus is moving at the same speed as the bus, and the insect flying relative to it.

So for an observer on the side of the road, the insect is flying at a speed of :

20 m/s + 2 m/s = 22 m/s

Answer:

Please see below as the answer is self- explanatory.

Explanation:

Similarities

Differences

Similarities:

The field vector is tangent to the field lines at any point of the trajectory. The density of field lines is relative to the quality of the field.

Differences:

Electrostatic Field lines begin in charge dispersions of positive charges and conclusion in charge dispersions of negative charges.

Magnetic Field lines are closed lines, due to there are no separated attractive charges found yet.

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The dependent, independent, and controlled variables​ are as follows:

1. Dependent - The effect of lime urea table salt and compost on the soil

2. Independent - The soil on which the elements are incorporated.

3. Controlled variable - The height of the plants.

The dependent variable is that which is tested in the experiment and in this experiment, Chandani is testing the effect of lime, urea, table salt, and compost on the soil.

The independent variable is the altered element in the experiment and for this experiment, this is the soil that receives different additives. Finally, the controlled variable is that which remains constant and that is the height of each plant that the researcher checks.

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We have that the the Electromagnetic induction is given as

Electromagnetic induction is the manufacturing of an mobile electric charge pressure throughout a conductor in a altering magnetic field

From the question we are told

Generally

This bases its theory on the use of magnetic bodies to generate or induce electric charge

Electromagnetic induction is the manufacturing of an mobile electric charge pressure throughout a conductor in a altering magnetic field

Hence we have that in complete the table you consider the Electromagnetic induction theory

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 50 × 0.85

We have the final answer as

Hope this helps you

Answer:

Units named after scientists are written in lowercase but their symbols are written as capital

Unit of power is watt, since it is named after a scientist, then symbol will be written as W

Farad, symbol = F

Henry, symbol = H

Units whose names aren't culled from that of scientists are written in lower case and their symbols are also in lower case.

Units such as meter, kilogram should be represented with symbols in small letters as: m and kg respectively.

Explanation:

Kindly check answer

Answer:

please i dont understand this

The center of the stick from the left edge of the stick is at,

The mass 125 g is at the distance of 25 cm from the hanging.

Thus, the distance of center of the stick from the hanging is,

As the stick is balanced,

Thus, the net moment due to the mass of the stick and given 125 g mass is zero.

where g is the acceleration due to gravity,

Substituting the known values,

Thus, the mass of the stick is 125 grams.

In the terms of kilogram, the value of the mass is,

The value of the mass in newton is,

Thus, the value of the weight of the stick is 1.225 N.

Answer: Convection causes the warmer air over land to expand and rise, which in turn causes low air pressure over the land. The cooler air over the ocean rushes in to replace the warm air that just rose over land. This causes a sea breeze.

Explanation:

hope this helped ;) ! -middle schooler

Answer:

convection

Explanation:

heat rises up

parameters given are:

time= 8.2 seconds

g(acceleration due to gravity)= \(9.8 m/s{2}\)

(a) skydivers downward velocity is given as

Vf = Vo + g(t)

Vf= 0 + 9.8 + (8.2)

Vf= \(80.36 m/s^{2}\)

(b) distance of the skydiver below the helicopter

h= Vo + 1/2 gt^2

h= 0 + (0.5) *(9.8) * (8.2)^2

h= 0.5* 9.8 * 67.24

h= 329.48m

What is Velocity?

Velocity is the rate at which an object changes its direction.

The skydivers downward velocity is 80.36m/s^2

The distance form the skydiver to the helicopter is 329.48 meters

In conclusion, initial velocity in the given question is equal to zero.

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Answer:

D. Push Factor

Explanation:

Weather hazards and natural disasters are horrendously negative things that people actively seek to avoid; they make people want to leave or depart from an area in order to escape them. As such, they are considered push factors.

(Weather hazards and natural disasters are not pull factors because when discussing push vs pull we are specifically describing the mentioned factor. This aspect is not considered both because the migration factor mentioned in this question actively makes people want to move to any area that avoids their issue. Remember that pull factors make people want to move to a specific place for a unique advantage, while push factors make people want to move to any general place for a common advantage.)

Answer: Remember, we do that in three steps. Compute the reflection color, compute the refraction color, and then apply the Fresnel equation. First, we compute the reflection direction. For that, we need two items: the normal at the point of intersection and the primary ray's direction.

Explanation:

Answer:

Speed =  4 m/s

Explanation:

Given:

009 (part 1 of 2)

H =1 .19 m

L = 1.98 m

g = 9.81 m/c²

____________

V₀ - ?

Equation of motion horizontally:

L = V₀*t           (1)

Equation of vertical motion:

H = g*t² / 2      (2)

From equation (2):

Time:

t = √ (2*H / g) = √ ( 2*1.19 / 9.81) ≈ 0,49 s

From equation (1):

Horizontal speed:

V₀ = L / t = 1.98 / 0.49 ≈ 4 m/s

Newton's second law of motion states that the acceleration of an object is directly proportional to the force applied to it, and inversely proportional to its mass.

This means that the greater the force applied to an object, the greater its acceleration will be. Similarly, the greater the mass of an object, the smaller its acceleration will be for a given force. Mathematically, this relationship can be expressed as F = ma, where F is the force applied to the object, m is its mass, and a is its acceleration. This law is fundamental to understanding the behavior of objects in motion and is used extensively in fields such as engineering and physics.

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--The complete Question is, What is the relationship between force, mass, and acceleration, as described by Newton's second law of motion?  --

The types of memories that are stored in the collective unconscious include instinctive patterns and archetypes from ancestral heritage.

The collective unconscious can be defined as  the part of the human mind  that contains distinct types of memories and also instinctive impulses in humans which may shape some of our behaviors regarding specific situations and also environmental contexts (e.g., during danger situations).

In conclusion, the types of memories that are stored in the collective unconscious include instinctive patterns and archetypes from ancestral heritage.

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Answer:

Explanation:

Reverse the second equation, and change the sign of the enthalpy

The vector with a magnitude of 5 and in the direction of the vector 4i - 3j + k is approximately (20/√26)i + (-15/√26)j + (5/√26)k.

The given vector can be normalized before being multiplied by the desired magnitude. This is how to locate the vector:

The vector that has been provided should be normalized by dividing each of its components by its magnitude. The Pythagorean theorem can be used to determine the magnitude of the vector 4i - 3j + k:

Magnitude = √(4² + (-3)² + 1²) = √(16 + 9 + 1) = √26

Normalize the vector by dividing each component by the magnitude:

Normalized vector = (4/√26)i + (-3/√26)j + (1/√26)k

Multiply the normalized vector by the desired magnitude:

To obtain a vector with a magnitude of 5, multiply each component of the normalized vector by 5:

Desired vector = 5 * ((4/√26)i + (-3/√26)j + (1/√26)k)

Simplifying the expression gives:

Desired vector ≈ (20/√26)i + (-15/√26)j + (5/√26)k

So, the vector with a magnitude of 5 and in the direction of the vector 4i - 3j + k is approximately (20/√26)i + (-15/√26)j + (5/√26)k.

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Answer:

The weight of the body is 3,924 N.

Explanation:

To solve this problem, we can use the formula for distance as a function of acceleration with initial velocity equal to zero:

distance = (1/2) x acceleration x time^2

We know that the distance the body is lifted is 20 meters, the time taken is 20 seconds, and the force applied is 200 N. We can use this information to calculate the weight of the body.

First, we need to calculate the acceleration:

distance = (1/2) x acceleration x time^2

20 = (1/2) x acceleration x (20)^2

acceleration = 0.5 m/s^2

Now that we know the acceleration, we can use the formula for weight:

force = mass x acceleration

We can rearrange this formula to solve for mass:

mass = force / acceleration

mass = 200 N / 0.5 m/s^2

mass = 400 kg

Finally, we can calculate the weight of the body using the formula:

weight = mass x gravity

Assuming a standard acceleration due to gravity of 9.81 m/s^2, we can calculate the weight:

weight = 400 kg x 9.81 m/s^2

weight = 3,924 N

Therefore, the weight of the body is 3,924 N.

Although she wasn't truly listening to what was being said, she would occasionally say "Yeah" or "Okay" to appease her mother. This destructive listening behaviour is known as: Defensive listening, first

Interrupting, eavesdropping, being confrontational, egotistical, defensive, selective, insensitive, and pseudo-listening are some examples of these poor listening techniques.

Pseudolistening– having to pretend to pay any attention and did appear considerate but is not trying to listen to realise or translate the data (audience members may answer back with a smile, mouth, or even a verbal cues appreciation but are dismissing or not planning to attend).

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Time it takes energy to pass through radiative zone is :  A) 8 minutes

Energy generated in the core of the Sun takes about 8 minutes to pass through radiative zone and reach the top of convective zone. The radiative zone is a layer of the Sun that lies just outside the core and it is characterized by high density and high temperature.

In this zone, energy is transported by photons that bounce around between atoms and ions that make up the plasma of the Sun. This process is known as radiative diffusion and is relatively slow compared to convective transport of energy that takes place in the outer layers of Sun.

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