How many seconds would it take a boat to accelerate from 13 m/s to 26 m/s over a distance of 1.25 km?

Water is a colorless, transparent chemical that makes up the majority of the earth's oceans, lakes, and streams. It is a crucial fluid that is essential to the continued existence of life on Earth.

The chemical formula for water is H2O. Two hydrogen atoms and one oxygen atom are held together by covalent bonds to make it up. The surface of the earth is made up of 71% of this liquid.

The boiling point of water is 100 degrees Celsius.

The freezing point of water is zero degrees Celsius. Water takes a very long time to freeze (or even boil), which is essential for the survival of our ecosystem.

Water becomes denser as it cools up to 4°C. Water then becomes less dense, though.

Therefore, Ice floats on water.

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Your question is incomplete but the above content might help.

They found out that their vectors did not point in the same direction because the two students observed the vector's motion from opposite direction.

Vector addition is the operation of adding two or more vectors together into a vector sum. For two vectors, the vector sum is obtained by placing them head to tail and drawing the vector from the free tail to the free head.

When the two students added a vector for a moving object’s position at t=2s to a motion diagram. They found out that their vectors did not point in the same direction because the two students observed the vector's motion from opposite direction.

Thus, they found out that their vectors did not point in the same direction because the two students observed the vector's motion from opposite direction.

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The deceleration of the car from a velocity of 100ms-1 to a final velocity of 20ms-1 in 10 seconds is 8ms-2.

We are aware that acceleration refers to an object's rate of increase in speed, and deceleration refers to an object's rate of decrease in speed.

Because it must be reported as a magnitude and a direction, acceleration is a vector. Negative and positive signs are used to denote the direction in circumstances of one-dimensional motion. Negative indicators indicate that the object is slowing down.

The unit of measurement is the meter per second square, or ms-2.

We know that

v= u + at,

where,

v= final velocity

u= initial velocity

t= time

a= acceleration

According to the question,

u= 100ms-1

v= 20ms-1

t= 10s

a=?

so, v = u + at

substituting the values in the equation, we get:

20 = 100 + 10a

a= -8 ms-2

Here, the negative sign shows that the car is decelerating,

Thus, deceleration is 8ms-2.

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The answer is:Area=1/2×b×h

Answer:

A= b×h ÷ 2

Explanation:

The Area of a triangle formula is the Base multiplied by the Height, then divided by 2

The gravitational energy of the brick before it was dropped was 507.15 J.

Let us assume that the brick is dropped from the rest at a height of h meters above the ground and reaches the ground at a speed of 26.0 m/s.

Given in question

Initial Velocity = u = 0 m/s ( dropped from rest )

Final Velocity = v = 26.0 m/s

Acceleration = a = g = 9.8 m/s

Using the third equation of motion,

v² - u² = 2ah

Put in the values, we get

(26)² - (0)² = 2×9.8×h

19.6h = 676

h = 676/19.6

h = 34.5 meters

So the brick was at the height of 34.5 meters before it was dropped. The gravitational potential energy of the body is given by

U = mgh, where

m = mass = 1.5 kg

g = acceleration due to gravity = 9.8 m/s²

h = height above the ground = 34.5 m

Put in the values, we get

U = 1.5×9.8×34.5 J

U = 507.15 J

Therefore, the gravitational energy of the brick before it was dropped was 507.15 J.

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Answer:

your question explains that an accelerometer is a device that uses the extension spring to measure acceleration in terms of Earth's Gravitational accelerations. So if this device is extended just 0.43 centimeters the possible accelerations is letter B. 0.80 g

The direction of the resultant of the three forces can be seen as resultant is 78.25 lb and its direction can be calculated as [tex]\theta[/tex] =65.19°.

To find component in x-direction,

Fx = p3 cos(30) + p2 cos (30+45) - p1 cos (40)

Fx = 46 cos(30) + 45 cos (75) - 20 cos (40)

Fx = 46x 0.866 + 45x 0.2588 - 20x 0.766

Fx = 39.836+11.646-15.32

Fx = 36.165 lb

To find component in y direction,

Fy = -p3 sin(30) - p2 sin (30+45) - p1 sin(40)

= -[ 46x 0.5 + 45x 0.96 + 20x0.16]

= -[23 + 43.2 + 3.2]

= - 69.4 lb

Fr = [tex]\sqrt{fy^{2} +fx^{2} }[/tex]

=[tex]\sqrt{(-69.4)^{2} + (36.165)^{2} }[/tex]

=[tex]\sqrt{4816.36+1307.9}[/tex]

=[tex]\sqrt{6124.26}[/tex]

= 78.25 lb

Then to find [tex]\theta[/tex]

[tex]\theta\\[/tex] = [tex]tan^{-1} \frac{fy}{fx}[/tex]

=[tex]tan^{-1}[/tex] (78.25/36.165)

= [tex]tan^{-1}[/tex] (2.163)

= 65.19°

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Rate of acceleration for a 5 kg grocery cart that’s being pushed with 50 N is 10 m/sec^2. The value of acceleration can be calculated with the help of following formula Fnet = m . a

Fnet is the  net force acting on the shopping cart

m is the mass of the grocery cart

a is the acceleration of the shopping cart

So on using the formula we get

Fnet = m . a

So on putting the values we get

Fnet = 50 N

m = 5kg

a = ?

50 = 5.a

On calculating we get the value of acceleration

a = 10 m/sec^2

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The amount of force required to stop a 100-kg football player if she negatively accelerates (decelerates) at 20 m/s² is 2000N.

Force is a physical quantity that denotes ability to push, pull, twist or accelerate a body and which has a direction.

The force required to accelerate a body can be calculated by multiplying the mass of the body by the acceleration as follows:

Force = mass × acceleration

According to this question, a 100-kg football player negatively accelerates (decelerates) at 20 m/s², the force needed can be calculated as follows:

F = 100kg × 20m/s²

F = 2000N

Therefore, the amount of force required to stop a 100-kg football player if she negatively accelerates (decelerates) at 20 m/s² is 2000N.

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A substance's density is defined as its mass per unit of volume. Density is most frequently represented by the symbol ρ, however Latin letter D may also be used.

If the density of an object is 9.331 x 10−2 lbs/cubic inch, what is its density in g/cm3?

9.331 x 10−2 lbs/cubic inch = 258 281 190,85 g/m³

To calculate the density:

The following is the density formula:

D = m/v, where D =  Density, m = mass, v = volume.

Write down the data and the density equation, solve for the mass, add the density to the volume, then multiply the result to get the density in grams.

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Answer:Is it possible to have positive acceleration with a negative velocity?

Explanation:An object which moves in the positive direction has a positive velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion (in this case, a negative acceleration).

Answer:

250 m/s      (VERY fast !)

Explanation:

30 km = 30 000 m

30 000 m / 120 s = 250 m/s

Answer: well

Explanation:

Assuming the bullet fired is a 32-gram .458 Winchester Magnum then it will take from 3.386 seconds to cover 1500 meters at  20∘C  to 3.404 seconds to cover 1474.6 meters at  0∘C. You cannot assume there is no air resistance without the result being incorrect by about 500 meters.

Answer:

number 1

Explanation:

using the formula of momentum

velocity × mass

number 1 gives more momentum hence will easily move the system

Answer: The atomic theory is important because it describes the composition of the atom and the properties of the subatomic particles as well as their behavior.

Explanation:

Even if our grasp of atomic theory may continue to develop throughout time, learning about it is still important for a number of reasons.

Thus, Atomic theory gives the fundamental ideas for comprehending matter behaviour and interactions between atoms and molecules, which forms the basis of modern chemistry.

It serves as the cornerstone of contemporary chemistry and provides insight into a number of chemical processes.

The development of atomic theory throughout millennia has been shaped by the efforts of numerous scientists. It has roots in antiquity.

Thus, Even if our grasp of atomic theory may continue to develop throughout time, learning about it is still important for a number of reasons.

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The magnitude of the charge is  q = 13.423 µC.

If the magnitude of an electric charge for a body is very small compared to the distance between them, they are referred to as point charges. As a result, the charge is thought to be concentrated at that location.

Let the first charge be q.

So

q1 = q

q2 = 2q

q3 = 4q

q4 = 8q

q5 = 16q

Total charge Q = q1 + q2 + q3 + q4 + q5 = 31q

Flux f = 4.7 × 10^7 N · m2/C

According to gauss law

                 Flux f = Q/(permittivity of free space)

            4.7 × 10^7 = 31q/(8.854*10^-12)

                         q = 1.3423*10^-5

                            = 13.423*10^-6 C

                            = 13.423 µC

The smallest possible charge q = 13.423 µC  

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A straight wire segment that carries 0.25a, would need 1.10m to produce a uniform magnetic field.

A uniform magnetic field is the solution. The magnetic field is considered to be uniform if its strength is the same at all of the area’s equally spaced points. It is represented by a parallel set of equally spaced lines.

A magnetic field that receives the same magnetic forces in all directions is said to have a uniform magnetic field. The magnetic field that experiences unequal forces from various directions is said to have a non-uniform magnetic field.

Helmholtz coils are available for purchase in order to provide a consistent magnetic field. The constant magnetic fields enable calibration in any scenario.

I = 0.25A

B = 0.015 J

F = 4.0 mN

F = I (dl x B)

4 x 10^(-3) = 0.25 x l x 0.015

⇒ l = (4 x 10^(-3)) / 0.015 x 0.25

≈ 1.1 m

Thus, the length required would be 1.1m

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Bill will experience the greater force.

Bill is driving a very old car with a hood designed to be rigid in a crash. Linda is driving a new car with a hood designed to crumple in a crash. Both have the same mass and are wearing seatbelts. in a head-on collision at the same speed with a stationary wall, which driver will experience greater force:

Bill will experience the greater.

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Answer:

malleability&flammable.

Explanation:

Juggler will catch the second ball 1 second after catching the first ball as the first ball comes down 1 second earlier than the second.

Two balls are thrown into the air. The first ball goes up with a velocity of 9.8m/s and the second ball goes with a velocity of 14.7m/s. We have to find out the Time difference between the balls when both of them land in the hand. We have Newton's first equation :  v = u + at =>  t = (v-u)/a

where, v = Final velocity, u = Initial velocity, a=g = Acceleration of gravity, and t = Time

For First ball, v1 = 9.8m/s, u1 = 0, g = 9.8 (acceleration for gravity),             t1 = time and multiplying the equation by 2 for marking journey of balls for both going up and down

              => t1 = 2(v1-u1)/g    =>  t1 = (9.8-0)/9.8

              => t1 = 2 seconds

For second ball, v2 = 14.7m/s, u2 = 0, g = 9.8 (acceleration for gravity),

t2 = time & multiplying the equation by 2 for marking journey of ball for both going up and down  => t2 = 2(v2-u2)/g  

              => t2 = (14.7-0)/9.8  => t2 = 3 seconds

Difference between the time taken by both balls t = t2-t1

                    => t = 1 second

So the second ball lands after 1 second.

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The boat had sailed 1130km.

Initial Boat travel time = 7 hours.

The boat's initial speed is 80 km/h

The boat's current speed is 95 km/h.

Boat travel time at present = 6 hours.

Total nautical miles traveled =?

Solution:

Speed = distance / time.

The distance = Speed * Time

1. Distance = 80 km/h x 7 hours

  Distance = 560 km

2. Distance = 95km/h x 6hours

   Distance = 570 km

Hence, total distance = 560km + 570km

                                    = 1130km

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Answer:

9.8 m/s2

Explanation:

the Acceleration is due and represented by g and the answer to that is 9.8 m/s2

The speed as the stone hits the ground is 29.4 m/s

The distance at which the stone fell is 44.1 m.

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.

An example of an amphetamine is speed. It is a central nervous system stimulant that releases significant amounts of dopamine. Dopamine is a neurotransmitter in the brain linked to reward and pleasure.

Although it is occasionally used to refer to other amphetamines, speed is the street name for amphetamine sulphate. It typically appears as an off-white or pinkish powder and occasionally as crystals. It can also be found in the form of a paste, which is often white, grey, or brown in color and can be grippy and wet.

Speed can be defined as the ratio of distance to time.

(a) To calculate the speed at which the stone hit the ground, we use the formula below.

Formula:

v = u+gt............ Equation 1

Where:

v = Final speed of the stone

u = Initial speed of the stone = 0 m/s

t = time = 3 seconds

g = acceleration due to gravity = 9.8 m/s²

Substitute the values above into equation 1

v = 0+3×9.8

v = 29.4 m/s

(b) To calculate the distance the stone fell, we use the formula below.

S = ut+gt²/2........... Equation 2

Where:

S = Distance

Solving for S by substituting into equation 2

S = (0×3)+(9.8×3²)/2

S = 44.1 m

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Answer:

See below

Explanation:

With N   at 0 degrees    

   35 degrees south of west becomes  90 + 35 = 125 °

x component      50 km  cos 125  = - 28.7 km

y component       50 km sin 125 =   41 km

The ratio of displacement to time is known as velocity. The bullet needs 0.553 seconds before it touches the ground.

Consider the vertical motion of bullet

We have equation of motion s = ut + 0.5 at²

       Initial velocity, u = 0 m/s

       Acceleration, a = 9.81 m/s²  

       Displacement, s = 1.5 m      

    Substituting

                     s = ut + 0.5 at²

                     1.5 = 0 x t + 0.5 x 9.81 xt²

                     t = 0.553 s

Time elapsed before the bullet hits the ground is 0.553 seconds.

b) Consider the horizontal motion of bullet

We have equation of motion s = ut + 0.5 at²

       Initial velocity, u = 200 m/s

       Acceleration, a = 0 m/s²  

       Time, t = 0.553 s      

    Substituting

                     s = ut + 0.5 at²

                     s = 200 x 0.553 + 0.5 x 0 x 0.553²

                     s = 110.6 m

     The bullet travels horizontally 110.6 m.

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Newton's second law of motion states that "the acceleration of an object is equal to the force on an object divided by the mass of the object.​"

Newton's second law of motion is also called the law of acceleration as it tells us about the acceleration of a moving object under the influence of an unbalanced force or net force not equal to zero.

According to the law, the acceleration of an object is directly proportional to the force on the object and inversely proportional to the mass of the object.

Acceleration a ∝ Force F                                                                       ....1

Acceleration a ∝ 1/Mass m                                                                    ....2

From 1 and 2  Acceleration a = [tex]\frac{Force}{Mass}[/tex]

Therefore, Newton's second law of motion states that "the acceleration of an object is equal to the force on an object divided by the mass of the object.​"

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The correct answer is Every living thing is formed of cells. When an old cell dies, a new cell is created.

All living things are primarily composed of cells, which serve as both the basic structural and organisational unit of all living things. According to the biological notion known as "cell theory," all cells are descended from previously existing cells. In the middle of the nineteenth century, it was initially put forward. All living things are composed mostly of cells, which also serve as the fundamental unit of reproduction. The cell theory is based on the following three basic postulates:

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The model that best represents this phenomenon is called Osmosis

In osmosis, a semi-permeable membrane allows the solvent to pass from a higher solvent concentration to a lower solvent concentration (or, to put it another way, from a lower solute concentration to a higher solute concentration).

As a result, the dialysis bag with the highest concentrated starch solution will absorb the most water from the outside (present in the beaker).

Line A thus displays the information gathered from the bag containing the highest concentrated starch solution.

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Gases move slower at temperatures not pressures.

All gases exhibit ideal behavior in low-pressure situations because when the pressure is very low, the gas particles are:

Far apart and rarely interacting

- gases move slower at temperatures, not pressures.

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According to doctors and health experts, resting heart rate should be taken before doing any physical activity. It is ideal to take your resting heart rate first thing in the morning.

The resting heart rate of an individual is of great importance in a medical examination as it is indicative of various infections or heart-related problems, if any, present in the individual.

The resting heart rate of any healthy individual falls between the range of 60 to 100 beats per minute. A resting heart rate below 60 and above 100 beats per minute, without any direct reason such as heavy exercise and physical exertion might be indicative of a serious developing heart condition; and the particular individual should consult a doctor.

The ideal time to take a resting heart rate is during resting time. It should be taken first thing in the morning before even coming out of bed. Resting heart rate should not be taken immediately after exercising or a workout.

Therefore, the ideal time to take resting heart rate is early in the morning before leaving the bed and doing any sort of physical activity.

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