What distance will a bicyclist cover in 25 seconds if he pedals with an acceleration of 2.5 meters/sec/sec?

Answer:

Wavelength of light in film (let y = lambda)

y = 500 nm / (4/3) = 375 nm    

There will be a phase change at the air/film interface (not the other side)

S = 4 t       thickness of film = S/4 where S equals 1 wavelength

This is because of the phase change at one surface

375 nm = 4 * t

t = 93.8 nm

Answer:

Its A

Explanation:

Just did the quiz

The pair of objects that should be strongly attracted is option A. A positively charged particle and a negatively charged particle.

When there is a positively charged particle  & the negatively charged particle so due to this it should be strongly attracted.  Also, when there are two positively charged particles, or a negative one or a include negative one or neutral one so it should not be strongly attracted. Therefore, the option A is correct.

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Answer:

no

Explanation:

gamma rays do have the most frequency, but they also have the highest amount of energy because they happen the most often.

Sound waves are a type of mechanical wave that propagate through a medium, typically air but also other materials such as water or solids.

Frequency: the frequency of a sound wave refers to the number of cycles or vibrations it completes per second and is measured in Hertz (Hz).

Amplitude: the amplitude of a sound wave refers to the maximum displacement or intensity of the wave from its equilibrium position. It represents the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds and smaller amplitudes corresponding to softer sounds.

Wavelength: the wavelength of a sound wave is the distance between two consecutive points in the wave that are in phase, such as from one peak to the next or one trough to the next. It is inversely related to the frequency of the wave.

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Answer: 0.25A

Explanation: To calculate the current in the circuit, we can use Ohm's Law, which states that the current (I) flowing through a circuit is equal to the voltage (V) divided by the resistance (R):

I = V / R

In this case, the total resistance of the circuit is the sum of the individual resistances of the three bulbs in series, which gives us:

R = 2 + 2 + 2 = 6 ohms

The voltage of the battery is given as 1.5V.

So, using Ohm's Law, we can calculate the current in the circuit as:

I = V / R = 1.5 / 6 = 0.25 amps

Therefore, the current in the circuit is 0.25 amps.

The current in the circuit is 0.25 A.

Voltage across the circuit, v = 1.5 V

Resistance in each resistors, R = 2Ω

Since, the resistors are connected in series combination, their effective resistance,

R' = 3R

R' = 3 x 2

R' = 6Ω

According to Ohm's law, if the temperature and all other physical factors remain constant, the voltage across a conductor is directly proportional to the current that is flowing through it.

So, according to Ohm's law,

V = IR

Therefore, current flowing through the given circuit,

I = V/R

I = 1.5/6
I = 0.25 A

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Answer:

B

Explanation:

The cost of manufacturing would have to be taken away from your profits becuase its costing you to build and get the materials. I believe this question is hard.

The net-work required to accelerate the car of mass 1200 kg is 840000 J.

Work can be deifned as the product of force and distance.

To calculate the amount of net-work required to accelerate 1200 kg car from 25 m/s to 45 m/s, we use the formula

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the net-work required is 840000 J.

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Answer: B

Explanation: the teacher just told us the answer

The gravitational force between the two spheres is \(1.67 \times 10^{-11} \ N\).

The given parameters;

The gravitational force between the two spheres is determined by applying Newton's law of universal gravitation as shown below;

\(F = \frac{Gm_1 m_2 }{r^2} \\\\\)

where;

\(F = \frac{(6.67\times 10^{-11})\times (1\times 1)}{2^2} \\\\F = 1.67 \times 10^{-11} \ N\)

Thus, the gravitational force between the two spheres is \(1.67 \times 10^{-11} \ N\).

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Answer:

Height = 1.54 m

Explanation:

Given:

Velocity = 41 m/s

Distance = 23 m

Find:

Height

Computation:

We know that

a = 9.8 m/s²

Time = Distance / Velocity

Time = 23 / 41

Time = 0.56 second

Height = (1/2)(9.8)(0.56)²

Height = 1.54 m

Answer:

Explanation:

work done=force*displacement

=350N*15m

=5250 joule

Explanation:(2.5kg) (7.5) m/s +70 kg(0) =(2.5kg +70 kg (v3) 18. 75 =72.5 =v3

The energy stored in the circuit at any time t is given by \(U = (1/2)L*I^{2} + (1/2)Q^{2} /C = (1/2)L*(V_{0} /R)^{2} *e^{(-2t/(R*C))} + (1/2)C*V_{0} ^{2} *(1 - e^{(-2t/(R*C)})).\)The units are in seconds.

The total energy stored in the circuit can be calculated using the formula: U = (1/2)L*I² + (1/2)Q²/C, where L is the inductance, I is the current, Q is the charge on the capacitor, and C is the capacitance.

Initially, the capacitor is uncharged, so the second term is zero.

Therefore, the initial energy stored in the circuit is U₀ = (1/2)L*I₀², where I₀ is the initial current, which is zero.

When the magnetic field is switched on, a current begins to flow in the solenoid.

This current increases until it reaches its maximum value, given by I = V/R, where V is the voltage across the solenoid and R is its resistance.

Since the solenoid is connected in series with the capacitor, the voltage across the solenoid is equal to the voltage across the capacitor, which is given by V = Q/C, where Q is the charge on the capacitor.

The charge on the capacitor is given by Q = C*V, where V is the voltage across the capacitor at any time t.

Therefore, we have I = V/R = Q/(R*C) = dQ/dt*(1/R*C), where dQ/dt is the rate of change of charge on the capacitor.

This is a first-order linear differential equation, which can be solved to give \(Q(t) = Q_{0} *(1 - e^{(-t/(R*C)}))\), where Q₀ is the maximum charge on the capacitor, given by Q₀ = C*V₀, where V₀ is the voltage across the capacitor at t=0.

The current in the solenoid is given by I(t) = \(dQ/dt*(1/R*C) = (V_{0} /R)*e^{(-t/(R*C)}).\)

The energy stored in the circuit at any time t is given by\(U = (1/2)L*I^{2} + (1/2)Q^{2} /C = (1/2)L*(V_{0} /R)^{2} *e^{(-2t/(R*C))} + (1/2)C*V_{0} ^{2} *(1 - e^{(-2t/(R*C)})).\)

The time t at which the energy stored in the circuit drops to 10% of its initial value can be found by solving the equation U(t) = U₀/10, or equivalently, \((1/2)L*(V_{0} /R)^{2} *e^{(-2t/(R*C)}) + (1/2)C*V_{0} /R)^{2}*(1 - e^{(-2t/(R*C)})) = (1/20)L*I_{0} /R)^{2}.\)

This equation can be solved numerically using a computer program, or graphically by plotting U(t) and U₀/10 versus t on the same axes and finding their intersection point.

The solution is t = 1.74 ms.

The units are in seconds.

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The values for the work done to the nearest 10 is as follows:

(a) The work done by the applied force can be calculated using the formula:

WA = FAdcosθ,

where FA is the applied force, d is the distance moved, θ is the angle between the force and the displacement, and cosθ is the cosine of that angle.

In this case, FA = 216 N, d = 71.0 m, and θ = 30.0° below the horizontal. Therefore,

WA = (216 N)(71.0 m)cos(-30.0°)

WA = 13,200 J.

(b) The force of gravity on the box is given by Fg = mg

The work done by the force of gravity is given by Wg = Fgd,

Fg = (51.0 kg)(9.81 m/s^2)

Fg = 500.31 N, and the box does not move vertically, so d = 0.

Therefore, the work done by the force of gravity is zero.

Wg = 0 J.

(c) The normal force on the box is equal in magnitude and opposite in direction to the force of gravity, so FN = Fg. Since the box does not move vertically, the normal force does not do any work.

Therefore,

WN = 0 J.

(d) The force of friction on the box can be calculated using the formula:

FF = μFN,

where μ is the coefficient of kinetic friction between the floor and the box, and FN is the normal force on the box.

In this case, μ = 0.100 and FN = Fg = 500.31 N. Therefore,

FF = (0.100)(500.31 N) = 50.03 N

The work done by the force of friction can be calculated using the formula:

WF = FFd

In this case, the box moves a distance of 71.0 m.

Therefore,

WF = (50.03 N)(71.0 m)

WF = 3,550 J.

(e) The net work on the box is the sum of the works done by each individual force.

Therefore,

WNet = WA + Wg + WN + WF = 13,200 J + 0 J + 0 J + 3,550 J

WNet = 16,750 J.

(f) Alternatively, we can find the net work by first finding the net force on the box.

The horizontal component of the applied force is FAcosθ, where θ = 30.0° below the horizontal.

Therefore,

FNet,x = FAcosθ - FF = (216 N)cos(30.0°) - (0.100)(500.31 N)

FNet,x = 91.10 N

The vertical component of the applied force is FAsinθ, where θ = 30.0° below the horizontal. Therefore,

FNet,y = Fg - FAsinθ =  (51.0 kg)(9.81 m/s^2) - (216 N)sin(30.0°)

FNet,y = 247.16 N

The net force on the box can be found using the Pythagorean theorem:

FNet = √(FNet,x² + FNet,y²)

FNet = √((91.10 N)² + (247.16 N)²)

FNet = 264.36 N

The direction of the net force is given by the angle θ between FNet,x and FNet:

θ = atan(FNet,y / FNet,x)

θ = atan(247.16 N / 91.10 N

θ = 70.9°

The net work done on the box is given by the formula:

WNet = FNetdcosθ, where d is the distance moved by the box.

In this case, d = 71.0 m.

Therefore,

WNet = (264.36 N)(71.0 m)cos(70.9°) = 16,750 J

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154.03 m/s

The Pythagorean theorem states that the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse (the side opposite the right angle)

so, to add the vectors we solve use tht P.T and solve for c

s

Step 1

a) let

b) now, replace in the formula:

therefore, the answer is

154.03 m/s

I hope this helps you

part a.  the wavelength of this wave  is 26 cm

part b. The amplitude (A) of a wave is 9 cm

The wavelength (λ) of a wave is described as the distance between two consecutive points on the wave that are in phase.

In this scenario, the distance between two corresponding points on the wave will be equal to the horizontal distance from crest to trough, which is 26 cm.

Hence, the wavelength of the wave is: λ = 26 cm

The amplitude (A) of a wave is described as the maximum displacement of a particle from its rest position as the wave passes through it.

In this scenario, the vertical distance from crest to trough is 18 cm, which is equal to twice the amplitude.

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The resultant of two displacement vectors having opposite directions is the difference of the two displacements, having the same direction as the smaller vector.

When two displacement vectors have opposite directions, it means they are pointing in opposite ways. In other words, one vector is in the opposite direction of the other. To find the resultant of these vectors, we need to subtract one vector from the other.

If we consider two displacement vectors, let's say vector A and vector B, and they have opposite directions, we can represent them as A and -B.

To find the resultant, we subtract vector B from vector A: A - (-B) or A + B.

The resultant will have the same direction as the smaller vector. This is because when we subtract a larger vector from a smaller vector, the resultant will have the direction of the smaller vector.

Therefore, the correct option is: "The resultant is the difference of the two displacements, having the same direction as the smaller vector."

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Answer:

The bus is moving at a constant speed.

Explanation:

We have the following facts from the question;

- The bus crosses a city block every 10 seconds.

- all the city blocks are the same length

Since all the city block are the same length, let's say the distance is d.

Since it crosses the city block every 10 seconds, we know that;

Speed = distance/time

Thus, Speed = d/10

Thus,it is moving at this speed of d/10 all through.

Therefore we can conclude that the bus is moving at a constant speed.

Answer:

wnd change

Explanation: wnd chsnge

We will have the following:

a)

So, the recoil is approximately -9.12 m/s.

b) Now, we determine the average force of the rifle:

First, we determine the time it took to have the final velocity the bullet:

Now, we determine the average force:

So, the average force was approximately 230.51 N.

c) If th bullet is accelerated to this velocity in 13.4 ms we will have that:

So, the force would be much greater.

Answer:

50 miles per hour

Explanation:

125/2.5 which equals to 50

Answer:

50 miles per hour

Explanation:

125 divided by 2.5 = 50

The coefficient of static friction be in order to keep the quarter from sliding outward when the turntable is in motion will be 0.31.

It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).

Mathematically it is defined as the product of the coefficient of friction and normal reaction.

On resolving the given force and acceleration in the different components and balancing the equation gets. The friction force balances centripetal force.

The given data in the problem will be;

m is the mass =6.25 g

r is the radius =25 cm=0.25 m

t is the time = 0.18 sec

μ is the coefficient of static friction =?

\(\rm F_c= mw^2r \\\\ f= \mu mg \\\\ F_C=f\\\\ mw^2r= \mu mg \\\\ \rm \mu = \frac{\omega^2r}{g} \\\\ \rm \mu = (\frac{2\pi}{1.8} )^2\frac{0.25}{9.81} \\\\ \rm \mu = 0.31\)

Hence the coefficient of static friction will be 0.31.

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Answer:

If you are reffering true or false, its true! <3

Answer:

yes, sliding a box is work against friction .

Answer:

4°C

Explanation:

Water is densest at 4°C.  Since dense water sinks, the bottom of the lake will be 4°C.

Hope it helps

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Segment a, which is drawn from the center of the polygon perpendicular to one of its sides, is called the apothem.

The typical hexagon has a surface area of around 874.6 square meters.

To find the area of a regular polygon, use the formula:

Area = (1/2) x Perimeter x Apothem

Find the perimeter of the polygon. Since the polygon has n sides, use the formula:

Perimeter = n x s

where s = length of one side.

Since s = 18m, find n by using the formula:

n = 360° / (180° - (360° / n))

where n = number of sides.

Plugging in the values:

n = 360° / (180° - (360° / n))

n = 360° / (180° - (360° / 6))

n = 6

So the polygon has 6 sides, which makes it a hexagon.

Now find the perimeter:

Perimeter = n x s

Perimeter = 6 x 18

Perimeter = 108m

Next, find the apothem, use the formula:

Apothem = s / (2 x tan(π/n))

Plugging in the values:

Apothem = 18 / (2 x tan(π/6))

Apothem = 9√3 m

Now use the formula for the area:

Area = (1/2) x Perimeter x Apothem

Area = (1/2) x 108 x 9√3

Area ≈ 874.6 m²

Therefore, the area of the regular hexagon is approximately 874.6 square meters.

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Answer:

Hitting it or throwing it with force.

Answer:

Pros of DNA phenotyping:

-Phenotypical characteristics can be predicted such as eye color, hair color, skin pigmentation, and many more.

-predict ancestry of an organism

-Use to find criminals

Cons of DNA phenotyping:

-Some phenotypical traits could not be predicted

- Invading privacy

This technology will surely help forensics, law enforcement as it helps track down unknown perpetrators of crime.

3 arguments for it:

- accurate in narrow down researches

- finding biological ancestry

3 arguments against it

It violates the privacy policy of an individual

Racial discrimination is done of public

Equality policies are not followed by it.

the kinematics allows searching for the variables of movement of the body, finding the initial velocity and the height of the body

        v₀ = 41.16 m/s and y = 86.4 m

given parameters

to find

The kinematics allows finding the relationships between the position, velocity and relationship of a body, for its use a reference system must be defined with respect to which to carry out the measurements. Let's set a rule system with the y-axis vertical and the upward direction as positive.

            v = v₀ - g t

Where v and v₀₀ are the velocity at the initial point e, respectively, g is the acerlation of gravity (g = 9.8 m / s²) and t is the time

At the highest point the velocity is zero

         0 = v₀ - g t

         v₀ = g t

         v₀ = 9.8 4.2

         v₀ = 41.16 m / s

To find the maximum height we use

        v² = vo² - 2 g y

where y is the height reached.

At the point of maximum height the velocity is zero

        0 = vo² - 2 g y

        y = \(\frac{v_o^2}{2g}\)

        y = \(\frac{41.16^2}{2 \ 9.8 }\)

        y = 86.44 m

using the criterion that the result is with a tenth

        y = 86.4 m

Using the kinematics relations we can find the initial velocity and the height of the body

         v₀ = 41.16 m / s and y = 86.4 m

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