. Biologically, humans are "preprogrammed" to have one major sleep cycle at night and another short one in mid-afternoon. In some cultures, a Siesta is the norm, while in other cultures, people are expected to remain awake all day. Other cultures may emphasize practices that lead to sleep deprivation, such as working long hours, socializing until late at night, and getting up early in the morning. What attitudes does your culture have toward sleep?

The time it takes the car to cover the distance is 0.45 seconds

Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future.

To calculate the time it takes the car to cover the distance, we need to find the final velocity first using the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 2

Finally, to calculate the time, we use the formula below.

Hence, the time it takes the car to cover the distance is 0.45 seconds.

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Writing in an online journal is different from writing in a paper one in the following way: it is easier to communicate online (option B).

A journal is a newspaper or magazine dealing with a particular subject.

A journal is an efficient medium to communicate the findings or results of an investigation to the public.

However, a journal can be virtual (online) or paper (hard copy). In this 21st century, it is easier to communicate to the masses online because more audience will be captured.

Therefore, writing in an online journal is different from writing in a paper one in the following way: it is easier to communicate online.

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Answer:

H = Vav t

Vav = 630 ft / 6 sec = 105 ft/s

Check:

H = Vav * t = 105 ft/sec * 6 sec = 630 ft

Answer:

They can be hunted, captured, and taken anytime in the United States without a permit.

Explanation:

Pigeons are not considered game birds.

The voltage produced by the first battery is 0.32 volt greater when compared to the voltage produced by the second battery

From the question given above, the following data were obtained:

We can obtain how great the voltage of the first battery is compared to the voltage if the second battery as follow:

How great is the voltage of first = Volatge of first - voltage of second

How great is the voltage of first = 3.12 - 2.8

How great is the voltage of first = 0.32 volt

Thus, the voltage of the first battery is greater than the voltage of the second battery by 0.32 volt

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The displacement of the box is obtained as 13.48 m along the horizontal surface.

Let us recall that the displacement is the distance covered in a specific direction. The displacement is a vector quantity because it has both magnitude and direction.

In this case, we want to obtain the displacement of the box when;

Initial velocity u = 6.50 m/s

final velocity v =  13.0 m/s

Acceleration a = 4.70 m/s2

Now;

v^2 = u^2 + 2as

s = v^2 -  u^2 /2a

s = (13)^2 - (6.5)^2/ 2 (4.70)

s = 126.75/9.4

s = 13.48 m along the horizontal surface

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The vector arrow representing an acceleration of magnitude 3 m/s² and different from vector arrow representing a negative acceleration of magnitude 3 m/s² so they are perpendicular forming a 90-degree angle between each other. Hence, option C is correct.

A vector has both magnitude and direction. It is frequently depicted as an arrow with a length proportionate to the magnitude and a direction matching the magnitude of the quantity. A vector lacks position, but possesses magnitude and direction. In other words, if a vector is shifted parallel to itself, its shape remains unchanged as long as its length remains constant.

According to the question,

The acceleration of magnitude 3 m/s² and different form the vector arrow representing a negative acceleration of magnitude 3 m/s².

Hence, they are perpendicular, forming a 90-degree angle between each other.

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The height of the 0.0050 Kg bullet 4 s after firing is 78.4 m

We'll begin by listing the given parameters from the question. This is given below:

The height of the bullet after 4 s can be obtained as follow:

h = ½gt²

h = ½ × 9.8 × 4²

h = ½ × 9.8 × 16

h = 4.9 × 16

h = 78.4 m

From the calculation made above, we can conclude that the the height of the bullet after 4 s of firing is 78.4 m

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A ball is dropped from the second floor and falls then the ball's velocity is positive  and acceleration is negative.

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6,240,000,000,000,000,000 electrons

Answer:

20 seconds

360 meters

Explanation:

On a distance-time graph:

Therefore:

Convert Bus A's given speed of 54 km/h into m/s by dividing by 3.6:

[tex]\implies \sf 54\; km/h=\dfrac{54}{3.6}=15\:m/s[/tex]

Therefore:

So the y-intercept is (0, 60) and the gradient is 15.

Substitute this information into the slope-intercept form of a linear equation to create an equation representing the motion of Bus A:

[tex]\boxed{y=15x+60}[/tex]

Convert Bus B's given speed of 36 km/h into m/s by dividing by 3.6:

[tex]\implies \sf 36\; km/h=\dfrac{36}{3.6}=10\:m/s[/tex]

Therefore:

So the y-intercept is (0, 160) and the gradient is 10.

Substitute this information into the slope-intercept form of a linear equation to create an equation representing the motion of Bus B:

[tex]\boxed{y=10x+160}[/tex]

To find the time when Bus A is at the same position as Bus B, substitute Bus A's equation into Bus B's equation and solve for x:

[tex]\implies 15x+60=10x+160[/tex]

[tex]\implies 15x+60-10x=10x+160-10x[/tex]

[tex]\implies 5x+60=160[/tex]

[tex]\implies 5x+60-60=160-60[/tex]

[tex]\implies 5x=100[/tex]

[tex]\implies \dfrac{5x}{5}=\dfrac{100}{5}[/tex]

[tex]\implies x=20[/tex]

Therefore, the two buses are at the same position 20 seconds after they start moving.

To find their position at this point, substitute x = 20 into one of the equations and solve for y:

[tex]\implies y=10(20)+160[/tex]

[tex]\implies y=200+160[/tex]

[tex]\implies y=360[/tex]

Therefore, the two buses are at the same position at 360 m from the origin.

Bus A overtakes Bus B 20 seconds after they start moving and at 360 m from the origin.

Answer:

32.7 m

Explanation:

If it is in the air for 5.16 s    the highest point is at one-half of this time

  =   5.16/2 = 2.58 s    <====== at this point velocity = zero

vf = vi + at

0 = vi - 9.8 (2.58)      shows vi = 25.3 m/s

d = vi t  + 1/2 at^2

 = 25.3 (2.58) - 1/2 (9.8) (2.58^2 )   = max height = 32.7 meters

The contact force (in N) between each pair of boxes is mathematically given as

F_{ab} = 3.56 N

F_{bc} = 1.2 N

Generally, Any force that is generated as a consequence of two objects coming into touch with one another is referred to as a contact force. Contact forces are present everywhere and are the cause of the vast majority of macroscopic groupings of matter's obvious interactions with one another.

In conclusion, The equation for is  Acceleration of the system is mathematically given as

a = 8.25 / (5.85 + 2.95 + 1.50)

a= 0.8 m/s^2

Therefore

F_{ab} = (Mb + Mc)*a

F_{ab} = (2.95 + 1.50) * 0.8

F_{ab} = 3.56 N

F_{bc} = Mc * a

F_{bc}= 1.5 * 0.8

F_{bc} = 1.2 N

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Malcolm's mother has schizophrenia, as does his cousin. Malcolm fears he has inherited the "schizophrenic gene" and will develop schizophrenia. Genetic factors create a predisposition or likelihood-not a certainty-that certain behaviors or disorders will develop.

Schizophrenia is a severe mental illness that causes its victims to perceive reality in peculiar ways. Schizophrenia can result in severely illogical thinking and behavior, incapacitating hallucinations, and delusions that make it difficult to carry out daily chores.

Even though there is no known cure for schizophrenia, it is controllable and controlled with medication and behavioral therapy, especially when it is identified and treated early.

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The speed of 36- year-old South African Mzwakhe Khanyile who ran 100.0 miles in 17 hours and 30 minutes is 5.714 miles/hr.

Speed is defined as the rate of change of distance travelled with respect to time. Mathematically -

s = Δd/Δt

Given in the question is a 36- year-old South African Mzwakhe Khanyile who ran 100.0 miles in 17 hours and 30 minutes. From this we can write-

Distance [d] = 100 miles

Time [t] = 17.5 hours

Mzwakhe Khanyile started running from d = 0 miles at time t = 0 hr.

The speed of Mzwakhe Khanyile will be -

s = Δd/Δt

s = (100 - 0)/(17.5 - 0)

s = 100/17.5

s = 5.714 miles/hr

Therefore, the speed of 36- year-old South African Mzwakhe Khanyile who ran 100.0 miles in 17 hours and 30 minutes is 5.714 miles/hr.

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Answer:

Buoyant force = g M / V * V = g d V where d is the mass / volume (density)

Fw = g * Vw * dw         buoyant force of water on block (10 N)

Fbr = g * Vw * dbr        buoyant force of brine on block

Fbr / Fw = 1.2        buoyant force of brine is 1.2 times that of water

Buoyant force of brine = 10 * 1.2 N = 12 N

Thus, the block will weight 90 - 12 = 78 N submersed in brine

a. The magnitude of the electric force on the bead is 1.0545 × 10⁻⁵ N  and its direction is to the right.

b. The work done on the bead is  2.025 × 10⁻⁶ J

c.  The change in electric potential energy (in J) as the bead moves from A to B is  -2.025 × 10⁻⁶ J

d. The potential difference (in V) between A and B is -60 V

The magnitude of the electric force on the charge is given by F = qE where

So, substituting the values of the variables into the equation, we have

F = qE

F = 37.0 × 10⁻⁹C × 285 N/C

= 10545 × 10⁻⁹ N

= 10.545 × 10⁻⁶ N

= 1.0545 × 10⁻⁵ N

Since the electric field is pointing to the right and the charge is positive, so, the direction of the electric force is to the right.

So, the magnitude of the electric force on the bead is 1.0545 × 10⁻⁵ N  and its direction is to the right.

The work done on the bead by the electric force is W = Fd where

So, substituting the values of the variables into the equation, we have

W = Fd

= 1.0545 × 10⁻⁵ N  × 0.192

= 2.02464 × 10⁻⁶ J

≅ 2.025 × 10⁻⁶ J

So, the work done on the bead is  2.025 × 10⁻⁶ J

From work-energy principles, the work done by the bead, W equal the change in electric potential energy of the bead ΔU.

ΔU = -W

Since W = 2.025 × 10⁻⁶ J

ΔU = -W

= -2.025 × 10⁻⁶ J

So, the change in electric potential energy (in J) as the bead moves from A to B is  -2.025 × 10⁻⁶ J

The potential difference between A and B is given by ΔV = ΔU/q where

So, substituting the values of the variables into the equation, we have

ΔV = ΔU/q

ΔV =  -2.025 × 10⁻⁶ J/37.0 × 10⁻⁹C

= -0.06 × 10³ V

= -60 V

So, the potential difference (in V) between A and B is -60 V

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The voltage produced by the first battery is 0.32 volt greater when compared to the voltage produced by the second battery

From the question given above, the following data were obtained:

We can obtain how great the voltage of the first battery is compared to the voltage if the second battery as follow:

How great is the voltage of first = Volatge of first - voltage of second

How great is the voltage of first = 3.12 - 2.8

How great is the voltage of first = 0.32 volt

Thus, the voltage of the first battery is greater than the voltage of the second battery by 0.32 volt

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The speed required would be 60 m/s to throw a ball straight up and the ball goes 180 meters high.

Velocity is defined as the displacement of the object in a given amount of time and is referred to as velocity.

t = 6 sec for the first path, which is when the ball is elevated to its highest point.

Neglect air resistance.

So, v = u + at

Here, v = 0

⇒ u - 10 × 6 = 0

Hence, u = 60 m/s

Now, s = ut + 1/2×a×t²

So, s = 60× 6 - 0.5 × 10 × 36 = 360 – 180 = 180 m

Therefore, the speed required would be 60 m/s to throw a ball straight up and the ball goes 180 meters high.

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Three objects are connected by light threads. The object weighing 5.00 kg and the object weighing 4.00 kg are connected by a string.

acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. The pulling force transmitted axially by a string, cable, chain, or other similar one-dimensional continuous object, or by each end of a rod, or another similar three-dimensional object, is referred to as tension.  The action-reaction pair of forces acting at the ends of the aforementioned elements can also be used to describe tension.

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The scientific reason for the change is that baking soda underwent a chemical change to evolve a gaseous carbon dioxide.

A chemical change is any process in which reactants are changed into products by the breaking or creation of chemical bonds.

In a chemical change, the chemical bonds in the reactants are broken and rearranged to form new substances called products. One of the evidences that a chemical change has occurred is gas evolution.

According to this question, a student adds baking soda to vinegar and observes that a large amount of gaseous carbon dioxide is released.

Therefore, it can be said that the scientific reason for the change is that baking soda underwent a chemical change to evolve a gaseous carbon dioxide.

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Answer:

KE= 1,536,000,000 Joules

Explanation:

The equation to find Kinetic Energy (KE) is

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

You are given

m=480,000.0 kg

v= 80 m/s

Substitute the values into the equation and solve for KE

[tex]KE= \frac{1}{2}* 480000*80^{2}[/tex]

KE= 1,536,000,000 Joules

The correct answer is 97.8 m.

The speed of an object is the rate at which it travels from one place to another in a set period of time. Since it only describes the amplitude of an object's motion and not its direction, it is a scalar quantity. The S.I. unit of speed is m/s.

Initial horizontal velocity u = 20 ms^-1

height, y = 120m

To cover 120m time taken be t sec,

now taking, g = 10 m/s^2

y = 1/2 g t^2

t^2 = 2y / g

t^2 = (2 × 120) / 10

t^2 = 240 / 10

t^2 = 24 s

t = √24

t = 4.89 sec

In 1 sec distance covered is,

x = ut

x = 20 × 4.89

x = 97.8 m

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The tension in the high wire strung between two buildings due to weight of Arlene is equal to 2879 newton.

A free body diagram or known as FBD is a diagrammatic representation of all the forces acting on the body at the moment without taking into consideration the surrounding of the object.

Tension is a vector quantity which is a manifestation of force in string or wire a tension is always a pulling force.

Given:

Mass of the lady = 51 kg

Acceleration due to gravity= 9.8 u

Distance between the two buildings= 13m

The given situation is an example of balance force in which the sin component of the tension in the high wire is balancing the weight of the lady

Weight of the lady = m × g

Where,

T is tension in the high wire

m the mass of the lady

g is acceleration due to gravity

Weight of the lady = 51 × 9.8

Weight of the lady = 499.8

According to the question-

T × sin 10° = m × g

T × 0.1736 = 499.8×9.8

T = 2879 newton

Therefore, The tension in the high wire strung between two buildings due to weight of Arlene is equal to 2879 newton.

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The skater’s average velocity is determined as 0.125 m/s.

The skater's average speed is determined as 0.25 m/s.

The average velocity of an object is the rate of change of total displacement with time of motion.

average velocity = total displacement / total time of motion

total displacement of the skater = final position - initial position

total displacement of the skater = 60 m - 0 m = 60 m

total time of motion = (8 mins) x (60 s / mins) = 480 seconds

average velocity = 60 m / 480 s

average velocity = 0.125 m/s²

The average speed of an object is the ratio of total distance to total time of motion.

average speed = total distance / total time

average speed = (60 m + 30 m + 30 m) / 480 s

average speed = 0.25 m/s

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Answer:

Convection!

Explanation:

This is convection because, when the air touches the ice cube it gets cooler, moves up, and drags in the fresh air to be cooled down once again. This cycle continues until the whole ice cube had been melted!