The rubber band contains .......potential energy as it is stretched.

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Answer:

What interference occurs when two waves are out of phase?

Image result for ______ interference occurs when two waves are out of phase.

Destructive interference

Destructive interference occurs when the maxima of two waves are 180 degrees out of phase: a positive displacement of one wave is canceled exactly by a negative displacement of the other wave. The amplitude of the resulting wave is zero.

Answer:

a its final velocity

Explanation:

Gravity causes a black dwarf to get dense enough for fusion to happen.

Gravity compresses the core of a protostar which leads to the increase in temperature. When the temperature is high enough that the star starts fusing hydrogen into helium. This fusion reaction is responsible for the formation of new stars.

So we can conclude that Gravity causes a black dwarf to get dense enough for fusion to happen.

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The magnitude of acceleration of the elevator is 0.46m/s². Details on how to calculate magnitude of acceleration can be found below.

The magnitude of acceleration of the accelerator can be calculated by dividing the difference in force by the mass of the accelerator.

According to this question, a 5.0 kg box is sitting on a scale in an elevator. Before the elevator moves, the scale reads 49.05 N, however, when the elevator accelerates into motion, the scale momentarily reads 46.75 N.

Magnitude of acceleration = (49.05 - 46.75)/5

Magnitude of acceleration = 2.3/5

Magnitude of acceleration = 0.46m/s²

Therefore, the magnitude of acceleration of the elevator is 0.46m/s².

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From the calculations, the value of the acceleration due to gravity is 0.38 m/s^2.

The weight of an object is obtained as the product of the mass of the body and the acceleration due to gravity.

Thus;

When;

mass = 120 kg

weight =  46 N

acceleration due to gravity = 46 N/120 kg

=0.38 m/s^2

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answer : input voltage = 377.143

steps:

Vout/Vin = Ns/Np

p = primary

s = secondary

primary and secondary voltages

are the same as

induced EMF

V is voltage

N is number of turns

output voltage / input voltage = secondary turns / primary turns

220/input voltage = 70 / 120

input voltage * 70 = 220 * 120

input voltage = (220 * 120)/70

input voltage = 377.143

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Socratic

quizlet

The coefficient of kinetic friction between the block and the incline is 0.168.

The coefficient of kinetic friction is determined from the principle of conservation of energy as follows;

distance traveled on the incline = L

L = h/sin35

L = 1.743 h

Since it takes twice the time travel down,

velocity to slide = 1.743 h/2t = 0.871 v

K.E of the block when it slides = ¹/₂mv₁²  = ¹/₂m(0.871v)² = 0.871²(K.E to fall) = 0.758K.E to fall straight down

1 - 0.758 = 0.24

μmgcos(35) = 0.24(mgsin(35)

μcos(35) = 0.24(sin(35)

μ = 0.168

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Answer:

The kinetic energy is proportional to the square of the speed, so doubling the speed increases the kinetic energy by a factor of 4.

a) The magnitude will be 0.838m

b) The displacement will be -17.35°

The path covered by an object from its initial point to final point.

Forces acting on the duck

x-axis:    0.13 + 0.16*cos(-56°) = 2.7 * ax  

ax = 0.0813 m/s^2

y-axis:    0.13*sin(-56°) = 2.7 * ay  

ay = -0.0491 m/s^2

The displacement on the x-axis

X = Vox * t + ax/2 * t²

X = 0.12* 3.2 + 0.0813/2*3.2²

X = 0.8

The displacement on the y-axis:

Y = Voy * t + ay/2 * t²

X = 0 - 0.0491/2*3.2²

Y=-0.25m

So, the magnitude and angle of this displacement [0.8,-0.25] is:

0.838m  at an angle of -17.35°

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Strong nuclear and weak nuclear forces act only over short range distances.

Forces are agents which bring about a change in the state or motion of an object.

Forces can be described as pull or push agents.

Forces can either be contact or non-contact forces.

Some non-contact forces are gravitational forces and nuclear forces.

Nuclear forces act only over short range distances. Example are the strong and weak nuclear forces.

Therefore, strong nuclear and weak nuclear forces act only over short range distances.

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Answer:

1,86

Explanation:

V=V0+a x t

8 m/s=0 m/s + a x 4,3 s

8m/s=a x 4,3 s

a= 8m/s / 4,3 s

a=1,86

V=Last speed

V0=Initial speed

a=acceleration

t=time

Answer:

893.8 [kJ].

Explanation:

1) the total heat can be calculated as

E=Q₁+Q₂+Q₃, where Q₁ - energy to heat the ice from -4 to 0; Q₂ - energy to melt the ice; Q₃ - to heat the water at 0 °C to 25 °C;

2) Q₁=λ*m*Δt₁, ⇒ Q₁=2100*2*4=16800 [J];

3) Q₂=c₂*m; ⇒ Q₂=333500*2=667000 [J];

3) Q₃=c₃*m*Δt₂; ⇒ Q₃=4200*2*25=210000 [j];

4) finally, the required heat is

E=16800+667000+210000=893800 [J]=893.8 [kJ].

We know By Einstein's Photoelectric Equation:

[tex]{:\implies \quad \sf h\nu =h\nu_{0}+\dfrac{1}{2}m{v^{2}}_{max}}[/tex]

[tex]{:\implies \quad \sf h\nu =h\nu_{0}+eV_{0}}[/tex]

[tex]{:\implies \quad \sf eV_{0}=h\nu -h\nu_{0}}[/tex]

[tex]{:\implies \quad \sf V_{0}=\dfrac{h\nu}{e}-\dfrac{h\nu_{0}}{e}}[/tex]

Since [tex]{\nu}[/tex] is plotted along X-axis and [tex]{V_0}[/tex] along Y-axis, it represents a straight line

(i) The slope of [tex]{V_{0}}[/tex] versus [tex]{\nu}[/tex] graph= (h/e) i.e it is a constant quantity and does not depend on the nature of the metal surface

(ii) The intercept on the [tex]{\nu}[/tex]-axis = [tex]{(h\nu_{0}/e)}[/tex] i.e it depends on the work function of the metal surface

Refer to the attachment for the graph

The speed of the cart after 3 seconds of Low fan speed is equal to 54 cm/s.

Mathematically, speed can be calculated by using this formula;

Speed = distance/time

At Low fan speed after 3 seconds, the distance covered is 162 cm:

Speed = 162/3

Speed = 54 cm/s.

At Medium fan speed after 5 seconds, the distance covered is 600 cm:

Speed = 600/5

Speed = 120 cm/s.

At High fan speed after 2 seconds, the distance covered is 128 cm:

Speed = 128/2

Speed = 64 cm/s.

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The speed of the cart after 3 seconds of Low fan speed is 55 cm/s.

The speed of the cart after 5 seconds of Medium fan speed is 120 cm/s.

The speed of the cart after 2 seconds of High fan speed is 63 cm/s.

Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by u for the initial speed while v for the final speed. its si unit is m/sec.

The graph in the attachment may be used to estimate the cart speed for various fan speeds.

Blue letters indicate the low fan speed. When the line drawn from x hits the blue line, the elapsed time is indicated on the x-axis cart speed after three seconds.

This is equivalent to 55 cm/s.Yellow markings indicate the medium fan speed. After 5 seconds, the line drawn from the point marked 5 on the x-axis crosses the yellow line, marking the time that has passed.

The intersection of the yellow line with the line drawn from the point marked 5 on the x-axis indicates the cart speed five seconds later. The y-axis measurement is roughly 120 cm/s.

Green markings indicate the high fan speed. On the x-axis is the elapsed time. Cart speed at the place where the green line and the line drawn from the x-point axis 2 connect. The y-axis reading is roughly 63 cm/s.

Hence, after the specified seconds, the cart's estimated speeds at low, medium, and high speeds are 55 cm/s, 120 cm/s, and 63 cm/s, respectively.

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Answer:

power= work done/ time

power=mgh/time

mass(m) =50kg

acelleration due to gravity (g)= 10g/m^2

height(h) =20.0m

time = 1min

Explanation:

power =50×10×20 /1

power = 10,000watts

power =10 ×10^3kw

p =10 Kilowatt's

The net force acting on a box of mass 8.0kg that experiences an acceleration of 4.0m/s² is 32N. Details about net force can be found below.

The net force of a body can be calculated by multiplying the mass of the body by its acceleration as follows:

Force = mass × acceleration

According to this question, a box with a mass of 8.0 kg is sitting on a frictionless surface and experiences an acceleration of 4.0 m/s2 to the right.

Net force = 8kg × 4m/s²

Net force = 32N

Therefore, the net force acting on a box of mass 8.0kg that experiences an acceleration of 4.0m/s² is 32N.

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Answer: 32N

Explanation: Force= Mass*Acceleration

Force=8*4= 32N

The correct order of processes leading up to the formation of a main sequence star is : ( C ) Gases condense to form a nebula, gravity causes the nebula to collapse and spin, a protostar forms, and nuclear fusion occurs.

A main sequence star is a group of stars which forms a band of stellar types usually 90 percent when plotted on a graph ( spectrum vs luminosity) it also represents the life stages of a regular star in the galaxy.

In conclusion the correct order of the main sequence star is; Gases condense to form a nebula, gravity causes the nebula to collapse and spin, a protostar forms, and nuclear fusion occurs.

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Explanation:

Snell's Law of refraction:

Refraction of light obeys the following its two laws which's snell's law.

[tex] \rm \cfrac{sin \: i}{sin \: r } = \mu[/tex]

This is known as the refractive index of the second medium with respect to the first medium. Mu is given as:

[tex] \rm\mu = \cfrac{Speed \; of \; light \; in\; the\; first \; medium}{Speed \; of \; light \; in\; the\; second \; medium}[/tex]

Let's take an example.

If a ray light travels from air to water,then mu = sin i/sin r is the refractive index of water with air.

[tex]\rm \cfrac{sin \: i}{sin \: r } = \mu[/tex]

Ex.1:Ray light from air to water

[tex] \rm \mu \: = \cfrac{3 \times {10}^{8} \: m \: s {}^{1} }{2.25 \times 10 {}^{8} \: m \: s {}^{ - 1} } = \cfrac{4}{3} = \boxed{ 1.33}[/tex]

Ex.2: Ray light from Air to glass:

[tex] \rm \mu \: = \cfrac{3 \times {10}^{8} m \: s {}^{ - 1} }{2 \times {10}^{8 \: } m \: s {}^{ - 1} } = \cfrac{3}{2} = \boxed {1.5}[/tex]

[tex] \rule{225pt}{2pt}[/tex]

Answer:  S =  850 km/h = 235.11 m/s

Explanation:

average speed  = total distance : total time elapsed

           distance = 3400 km

           total time = 4 hours

average speed = D : T =  3400 km : 4 h = 850 km/h

[ 850 km /h = 850 000 m : 3600 s = 236.11 m/s ]

Answer:

6 amps

Explanation:by Kirchhoff's loop rule the current at any point in the loop must be equal or charge would be building up. The current at the ammeter is equally to the total current through the sun of the paths in parallel which it is in series with

According to Newton's first law of motion, what happens to the ball is  the ball rolls backward.

This means that an object at rest or in motion will remain uniformly rectilinear and tend to be in that state if the net force on it is zero.

In this case, we have to think that the ball is at rest and the train is moving with a velocity that way, the reaction of the ball will be to go in the opposite direction to the motion.

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Answer:

Because the angle of the sun moves/rotates in the summer, the sun's rays move their angle and impact the earth.

The resulting wave will have zero amplitude, thus it will form a straight line.

A crest is an upward displacement of a progressive wave.

A trough is a downward displacement of a progressive wave.

When the two waves meet each other at point X, they will superimpose and cancel out since they have equal amplitude and are in opposite direction.

The resulting wave will have zero amplitude, thus it will form a straight line.

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Answer:

Friction is the resistance of motion when two objects rub against each other.

Explanation:

Hope this helps.

Answer:

People used wind energy to propel boats along the Nile River as early as 5,000 BC. By 200 BC, simple wind-powered water pumps were used in China, and windmills with woven-reed blades were grinding grain in Persia and the Middle East.

Explanation:

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Answer:

1.21 or 1.2 acceleration

Explanation:

i think it is 50.0/41.0

which would equal 1.21(depending on if you round it)

The main issue that is being discussed in the manuscript is the development of science.

Capitalism impacts on science because extremely narrow and specialized bodies of knowledge creating problems for scientists to bring revolution. The dominant ideas in the society can also limit the development of science.

So we can conclude that the main issue that is being discussed in the manuscript is the development of science.

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Answer:

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