A motorcycle is stopped at a stop light. When the light turns green it
accelerates at 4.2 m/s^2. How far does it travel during 3 s? *

A hypothesis is a prediction made prior to conducting research. It is constructed in such a way that it can be tested to see if it is true. A theory is a principle developed to explain what has already been observed in data.

A hypothesis is an explanation proposed for a phenomenon. The scientific method requires that a hypothesis be testable in order for it to be considered a scientific hypothesis.

Scientists typically base scientific hypotheses on previous observations that cannot be adequately explained by existing scientific theories.

Theories are frequently used by scientists, researchers, and psychologists to guide their research and develop hypotheses.

A theory must be supported by evidence, whereas a hypothesis guides research and aids in the collection of evidence.

A theory is a tested, well-substantiated, unifying explanation for a set of verified, proven factors in science. A theory is always supported by evidence, whereas a hypothesis is only a possible outcome that can be tested and falsified.

Thus, this way one can concluded that the hypothesis and theories are related.

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Answer:

Your answer is static discharge

Explanation:

Your negatively charged hand repels electrons in the metal, so the electrons move to the other side of the knocker. ... This allows electrons to suddenly flow from your hand to the knocker. The sudden flow of electrons is static discharge. The discharge of electrons is the spark you see and the shock you feel. I hope this helps, ( the other answer said static electricity which is wrong.) :)

Answer:

C

Explanation:

Answer:

eclipsing binary star system

Explanation:

The eclipsing timing method is one of the indirect methods Astronomers use to detect extrasolar planets. Eclipsing binary star system is detected from the drop in luminosity as one star passes in front of the other. The orbit plane of the two stars lies so nearly in the line, when viewed from Earth.

Thus, A binary star system that is detected from the drop in luminosity as one star passes in front of the other is called eclipsing binary star system.

Answer:

Explanation:

Force = Mass * acceleration due to gravity.

Given

Mass of the paratrooper = 57kg

Acceleration due to gravity = 9.81m/s²

Required

Force pulling him down

Substitute unto formula;

F = 57 * 9.81

Force = 559.17 N

Hence the force pulling him down is 559.17N

The force pulling the paratrooper as he falls down is 558.6 N.

The given parameters;

The force pulling the paratrooper is force of gravity and the magnitude can be determined by applying Newton's second law of motion as shown below;

F = mg

F = 57 x 9.8

F = 558.6 N

Thus, the force pulling the paratrooper as he falls down is 558.6 N.

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Answer:

The Elements are arranged from left to right and top to bottom in order of increasing atomic number, and aslo

The arrangement of the periodic table was formulated in order to give a very informative representation of the chemical elements

Answer:

152 N

Explanation:

From the question,

F-F' = ma................. Equation 1

Where F = Horizontal force, F' = Frictional force, m = mass of the object, a = accleration of the object.

But,

F' = mgμ............... Equation 2

Where g = acceleration due to gravity, μ = coefficient of friction.

make m the subject of the equation

Substitute equation 2 into equation 1

F-mgμ = ma.

make m the subject of the equation

m = F/(gμ+a).............. Equation 3

Given: F = 125 N, g = 9.8 m/s², μ = 0.7, a = 1.2 m/s²

Substitute these value into equation 3

m = 125/[(9.8×0.7)+1.2)

m = 125/8.06

m = 15.51 kg.

But,

W = mg.............. Equation 4

Where W = weight of the object.

W = 15.51(9.8)

W = 152 N

Answer:

i will try out give me some time to solve this

Answer:

Explanation:

See attached file for answer.

Answer:

Explanation:

To find the force acting on an object given it's mass and acceleration we use the formula

From the question

mass = 1720 kg

acceleration = 3.0 m/s²

We have

Force = 1720 × 3

We have the final answer as

Hope this helps you

Answer:

The  coefficient of kinetic friction  [tex]\mu_k =  0.724[/tex]

Explanation:

From the question we are told that

   The  length of the lane is  [tex]l =  36.0 \  m[/tex]

    The speed of the truck is  [tex]v  =  22.6\  m/s[/tex]

Generally from the work-energy theorem we have that  

    [tex]\Delta KE  =   N  *  \mu_k *  l[/tex]

Here N  is the normal force acting on the truck which is mathematically represented as

     [tex]\Delta KE[/tex] is the change in kinetic energy which is mathematically represented as

        [tex]\Delta KE =  \frac{1}{2} *  m *  v^2 [/tex]

=>     [tex]\Delta KE =  0.5  *  m *  22.6^2 [/tex]

=>      [tex]\Delta KE =  255.38m  [/tex]

        [tex]  255.38m =    m *  9.8  *  \mu_k *   36.0 [/tex]

=>     [tex]  255.38  =    352.8  *  \mu_k  [/tex]

=>   [tex]\mu_k =  0.724[/tex]

Explanation:

photo means light in latin

kinetic means to move

Answer:

1-steal an inhaler 2-use it 3-your good

orrrr

1-swallow air(preferably air from space)

Answer:

then breath

Explanation:

Answer:

v = 0.166 [mm/min]

Explanation:

To solve this problem we must calculate the speed of each bus by means of the following formula that relates the displacement with time.

V = displacement / time

displacement = 250 [mm]

time = 5[min] = 300 [s]

Vx = 250/300 = 0.833[mm/min]

Vy = 300/300 = 1 [mm/min]

The relative velocity is the subtraction of the velocities, since the velocities are in opposite directions.

v = (1 - 0.833) = 0.166 [mm/min]

Answer:

We are given:

m = 50g OR  0.05 kg

v = 1000 m/s

Force applied by the gunner in a second = 180 N

Momentum(p) of the bullet:

p = mv

p = 0.05 * 1000

p = 50 kg m/s

Finding the recoil force:

The units kg m/s are also known as 'N' (newtons)

So, we can say that the force exerted on every bullet is 50 N

According to the law of conservation of momentum, every bullet fired applies a force of 50N towards the gunner

Hence, we can say that the recoil force of every bullet is 50N

Finding the number of bullets fired in a minute:

We are given that the gunner applied an average force of 180N on the gun

we know that that can also be written as 180 kg m/s. Notice the 's' in the units of the momentum, it tells us that this force is applied every second

So, to find the amount of force applied in a minute, we can multiply it by 60

Force applied by the gunner in a minute = (60 * 180) = 10800 N

Let n be the number of bullets fired in a minute

We can say that the force applied by the gunner is equal to the force applied by a bullet times the number of bullets fired

F(gunner) = n * F(bullet)

10800 = n * 50

n = 10800/50

n = 216 bullets / minute

The gunner shoots 216 bullets in a minute

Answer:

the answer is C

Explanation:

hope it helped!!!

Answer:

6.78 km

Explanation:

Length of path due east  = 4.3km

Length of path south = 2.48km

Unknown:

Distance covered = ?

Solution:

The distance covered is the total length of path from start to finish. It takes cognizance of the turns and every direction moved.

Unlike displacement which only considers the net direction from start to finish, distance sums up the total path.

 So;

   Distance  = 4.3km + 2.48km = 6.78km

Answer:

Explanation:

Answer:

1,3,2,4,5

Explanation:

Because I had right

Following these steps will help write chemical formulas by identifying the elements, finding their symbols, arranging them in order, and determining the appropriate prefixes representing them with subscripts.

Here is the correct order for writing chemical formulas :

1) Identify the elements in the compound.

2) Use the periodic table to find the symbols of elements in the compound.

3) Write the chemical symbols in the order shown in the name.

4) Use prefixes to determine the number of each type of atom in the compound.

5) Use subscripts to show the number of each type of atom in the compound.

Therefore, Following these steps will help you correctly write chemical formulas by identifying the elements, finding their symbols, arranging them in the correct order, determining the appropriate prefixes for the number of atoms, and representing them with subscripts.

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Answer:

I = 0.09[amp] or 90 [milliamps]

Explanation:

To solve this problem we must use ohm's law, which tells us that the voltage is equal to the product of the voltage by the current.

V = I*R

where:

V = voltage [V]

I = current [amp]

R = resistance [ohm]

Now, we replace the values of the first current into the equation

V = 180*10^-3 * R

V = 0.18*R (1)

Then we have that the resistance is doubled so we have this new equation:

V = I*(2R) (2)

The voltage remains constant therefore 1 and 2 are equals and we can obtain the current value.

V = V

0.18*R = I*2*R

I = 0.09[amp] or 90 [milliamps]

Answer:

So uhh.... Acceleration means to accel or to go higher or like better. So not that one and velocity is speed too so, it has to be kinetic energy or something lke that.

Explanation:

Answer:

The colors of the sunset result from a phenomenon called scattering. Molecules and small particles in the atmosphere change the direction of light rays, causing them to scatter. ... The short-wavelength blue and violet are scattered by molecules in the air much more than other colors of the spectrum.

Explanation:

Answer:

The scattering and reflection of light by dust particles.

Answer:

Your accleration would be 3.2 seconds because it takes you that long to reach 35 miles per hour.

Explanation:

I really hopes this helps.

Answer:

10m/s

Explanation:

solution:

a= v-u / t

or,4= v-2 / 2

or,8= v-2

or,8+2= v

or,v = 10

Answer:

v= 14 m/s

Explanation:

        ⇒ΔK = -ΔU

        ⇒ [tex](\frac{1}{2}*m*v^{2}-0) =-(0- m*g*h) = m*g*h[/tex]

       [tex]v_{f} = \sqrt{2*g*h} =\sqrt{2*9.8m/s2*10.0m} = 14 m/s[/tex]