Can anybody help please?

Answer:

Explanation:

As given, the student has three balloons and rubs two of them on a piece of wool. The rubbing of balloon on wool is the independent variable as it was done on two and not on the third as control.

3.75 N

Explanation:

F = k(q)(q)/r^2 = 5 N

F' = k(q)(3q)/(2r)^2

= k×3(q)(q)/4r^2

= (3/4)[k(q)(q)/r^2]

= (3/4)F

= (3/4)(5 N)

= 3.75 N

The new electric force is 3.75 N.

The force on the charges by Coulomb's law is given by;

F = kq1q2/r^2

where q1=q2

F = kq1^2/r^2

Where F = 5N

If one of the charges triples;

q2 = 3q1

distance doubles = r = 2r

F' = 3kq1^2/4r^2

So;

F' = 3/4 F

F' = 3/4 × 5 = 3.75 N

The new electric force is 3.75 N.

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They tell me I'm a god, I'm lost in the facade

Six-feet off the ground at all times, I think I'm feelin' odd

No matter what I make, they never see mistakes

Makin' so much bread, I don't care that they're just being fake

They tell me they're below me, I act like I'm above

The people blend together but I would be lost without their love

Can you heal me? Have I gained too much?

When you become untouchable, you're unable to touch

Is there a real me? Pop the champagne

It hurts me just to think and I don't do pain

Stayin' still, eyes closed

Let the world just pass me by

Pain pills, nice clothes

If I fall, I think I'll fly

Touch me, Midas

Make me part of your design

None to guide us

I feel fear for the very last time.

Answer: There you go

Explanation:

Explanation:

there is no relationship between small mass and the bigger mass, but it can be related with the acceleration. Since Force is constant, acceleration is inversely proportional to the mass. Greater the mass, lesser is the acceleration and vise versa

Answer:

1.5 m/s²

Explanation:

Applying,

a = (v-u)/t ...................... Equation 1

Where a = acceleration of the particle, v =  final velocity of the particle, u = Initial velocity of the particle, t = time.

From the question,

Given: u = 0 m/s (From rest), v = 15 m/s, t = 10 seconds

Substitute these values into equation 1

a = (15-0)/10

a = 15/10

a = 1.5 m/s²

Answer:

Due to waves.

Explanation:

The can merely moves up and down because the movement of the waves that propagate away from the disturbance caused by the boat. The Can has low density due to low mass and high volume which allow the can to float on the surface of water after prevent it from the drowning. The wave moves the can up and down but prevent it from going deep inside the water so we can say that the can moves due to movement of waves in water.

Answer:

emf = - 0.622 V

Explanation:

The electromotive force is given by Faraday's law

         emf = [tex]- \frac{d \phi }{dt}[/tex]

         Ф = B. A

bold indicates vectors

        Ф = B A cos θ

in this case it is indicated that the magnetic field is constant and the angle between the magnetic field and the normal to the area is parallel, so the cos 0 = 1

we substitute

           emf = [tex]- B \ \frac{dA}{dt}[/tex]

the area of ​​the circle is

          A = pi r²

         [tex]\frac{dA}{dt} = \pi 2r \ \frac{dr}{dt}[/tex]

       emf = B 2π r [tex]\frac{dr}{dt}[/tex]

speed is defined

       v = [tex]\frac{dr}{dt}[/tex]

we substitute

        emf = - 2π B r v

let's calculate

        emf = - 2π  0.5  1.65  π0.12

        emf = - 0.622 V

Answer: B 3.0

Explanation:

Answer:

2

Explanation:

The ticks go by 2's and its the first one after 0

Answer:

b

Explanation:

Answer: Hello your question is incomplete, I was able to find the question online but I am unable to attach it due to plagiarism rules

answer : Lithium and Potassium

Explanation:

The elements that are in the unknown sample are : Lithium and Potassium

An Emission spectrum is used to determine the composition of a material and it is distinctively different for each element that us found on the period table

Answer:

Calculations involving forces

The resultant force is the single force that has the same effect as two or more forces acting together.

Two forces in the same direction

Two forces that act in the same direction produce a resultant force that is larger than either individual force.

You can easily calculate the resultant force of two forces that act in a straight line in the same direction by adding their sizes together.

Example

Two forces, 3 N and 2 N, act to the right. Calculate the resultant force.

Two arrows, one above the other, both pointing to the right, one labelled 2 N and one labelled 3 N. Then an equals sign and then another arrow to the right labelled 5 N.

Two forces acting in the same direction

Resultant force F = 3 N + 2 N = 5 N to the right.

The resultant force is 5 N to the right.

Two forces in opposite directions

Two forces that act in opposite directions produce a resultant force that is smaller than either individual force.

To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force.

The direction of the resultant force is in the same direction as the larger force.

Example

A force of 5 N acts to the right, and a force of 3 N act to the left.

Calculate the resultant force.

Two arrows, one above the other, one pointing to the left, labelled 2 N, the other pointing to the right labelled 3 N. Then an equals sign, with an arrow to the right labelled 1 N.

Two forces acting in opposite directions

Resultant force F

Resultant force F = 5 N - 3 N = 2 N to the right.

The resultant force is 2 N to the right.

Explanation:

Thanks me later

Answer: Your question is open ended therefore i will provide a general answer based on the general concept of  your question.

Answer : At half distance between the center of the Magnetic field the magnetic pole the effect of the magnetic field generated will be half as strong

Explanation:

Magnetic force  ∝  1 / d^2

This simply means increase in the squared distance of an object leads to the decrease in the effect of the magnetic field generated by a current carrying wire.  

Hence ;  

At half distance between the center of the Magnetic field the magnetic pole, the effect of the magnetic field generated will be half as strong

Half the distance from a current-carrying wire to the body required to stand, in order for the magnetic field generated by the wire to be half as strong.

The magnetic field is the field in the space and around the magnet in which the magnetic field can be fill.

The value of magnetic field is reduced from a wire, with the distance of the wire.

The magnetic field is inversely proportional to the square of the distance of the current-carrying wire.

Hence, half the distance from a current-carrying wire to the body required to stand, in order for the magnetic field generated by the wire to be half as strong.

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Answer:

58.6 m/s²

Explanation:

Applying,

s = ut+gt²/2............ equation 1

Where s = height of the rock, u = initial velocity, t = time, g = accelration due to gravity of the planet.

From the question,

Given: s = 1.55 m, t = 0.23 s, u = 0 m/s (dropped from an height)

Substitute these values into equation 1

1.55 = (0×0.23)+g(0.23²)/2

1.55 = 0.0529g/2

0.0529g = 3.1

g = 3.1/0.0529

g = 58.6 m/s²

Answer:

ultraviolet light  (UV) has more energy than blue light, so electrons must have higher kinetic energy

Explanation:

This is a photoelectric effect exercise, which was explained by Einstein assuming that light is composed of photons and that they interact with electrons as particles.

       h f = K + Ф

where fi is the work function of the material

       K = hf -Ф

the work function for a given material is constant, therefore let's find the energy of each photon

       E = h f

        c = λ f

        f = c /λ

we substitute

         E = h c /λ

Blue light    λ = 450 nm = 450 10⁻⁹ m

          E = 6.63 10⁻³⁴  3 10⁸/450 10⁻⁹

          E = 4.42 10⁻¹⁹ J

UV light       λ = 400 nm = 400 10⁻⁹ m

          E = 6.63 10⁻³⁴ 3 10⁸/400 10⁻⁹

          E = 4.97 10⁻¹⁹ J

therefore ultraviolet light has more energy than blue light, so electrons must have higher kinetic energy

1. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.

2. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.

3. _______

Answer:

0.909 J/gºC.

Explanation:

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

Heat (Q) = 17000 J

Initial temperature (T₁) = 16 °C

Final temperature (T₂) = 38 °C

Mass (M) = 850 g

Specific heat capacity (C) =?

Next, we shall determine the change in the temperature of the metal. This can be obtained as follow:

Initial temperature (T₁) = 16 °C

Final temperature (T₂) = 38 °C

Change in temperature (ΔT)

ΔT = T₂ – T₁

ΔT = 38 – 16

ΔT = 22 °C

Finally, we shall determine the specific heat capacity of the metal. This can be obtained as follow:

Heat (Q) = 17000 J

Change in temperature (ΔT) = 22 °C

Mass (M) = 850 g

Specific heat capacity (C) =?

Q = MCΔT

17000 = 850 × C × 22

17000 = 18700 × C

Divide both side by 18700

C = 17000 / 18700

C = 0.909 J/gºC

Therefore, the specific heat capacity of the metal is 0.909 J/gºC.

Answer:

1.47 x 10^-10

Explanation:

Acellus

The capacitance of the given capacitor is approximately 1.4805 × [tex]10^{(-10)[/tex]F.

The capacitance (C) of a capacitor is determined by the formula:

C = (ε₀ ×A) / d

Where:

C is the capacitance

ε₀ is the permittivity of free space (ε₀ ≈ 8.85 × [tex]10^{(-12)[/tex] F/m)

A is the area of the plates

d is the distance between the plates

Given:

Area of the plates (A) = 5.25 × [tex]10^{(-5)[/tex]m²

Distance between the plates (d) = 3.14 × [tex]10^{(-6)[/tex] m

Using the given values, we can calculate the capacitance:

C = (ε₀ ×A) / d

C = (8.85 × [tex]10^{(-12)[/tex] F/m) × (5.25 × [tex]10^{(-5)[/tex] m²) / (3.14 × [tex]10^{(-6)[/tex]m)

Simplifying the expression:

C = (8.85 × 5.25 × [tex]10^{(-12 - 5)[/tex]) / (3.14 × [tex]10^{(-6)[/tex])

C = (46.4625 × [tex]10^{(-17)[/tex]) / (3.14 × [tex]10^{(-6)[/tex])

C = 14.805 × [tex]10^{(-17 - (-6)}[/tex])

C = 14.805 × [tex]10^{(-11)[/tex]

Using scientific notation,  capacitance as:

C = 1.4805 × [tex]10^{(-10)[/tex] F

Therefore, the capacitance of the given capacitor is approximately 1.4805 × [tex]10^{(-10)[/tex] F.

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Answer: 29.48 s

Explanation:

Given

The initial height of the ball is [tex]h=2.6\ m[/tex]

The ball leaves with an initial velocity of [tex]u=-20\ m/s[/tex]

Using the equation of motion

[tex]h=ut+\dfrac{1}{2}at^2\\\text{Insert the values}\\\\2.6=20\cdot t+\dfrac{1}{2}\times 9.8\times t^2\\\\\Rightarrow 9.8t^2+20t-5.2\\\\\Rightarrow t=\dfrac{-20\pm \sqrt{20^2-4\times 9.8\times (-5.2)}}{2\times 9.8}\\\\\Rightarrow t=\dfrac{-20\pm 603.84}{19.8}\\\\\Rightarrow t=29.48\ s\quad [\text{Neglecting negative t}][/tex]

Therefore, it take 29.48 s for ball to reach the ground.

Answer:

When Copernicus first systematically created his Sun-centered model of the universe, it did not lead to substantially better predictions of planetary positions than the Ptolemaic model because the Catholic Church, which was the power at the time, stated it was false, and anybody who believed Copernicus and spread the "myth" were excommunicated or even executed. This was because a sun centered universe would mean that everything the Catholic Church had been teaching about how the Earth was the center of the universe would be false. If people believed it, the church would no longer be seen as the infallible authority, so they needed to stop it from spreading.

Answer:

The photo is blocked cant see anything

Explanation:

Answer:

1 N2 +3 H2 ---> 2NH3

Explanation:

hope this helps

do mark it :D

Answer:

i dont think anything will happen so maybe A: the wall is larger than you.

Explanation:

Explanation:

The graphs show maximum gravitational potential energy for the pendulum and they correspond to positions #1 and #5.

Answer:

[tex]F_1=366.67Hz[/tex]

Explanation:

From the question we are told that:

Frequency of 3rd harmonics [tex]F_3=1100[/tex]

Frequency of 5th harmonics [tex]F_3=1833[/tex]

Generally the equation for Wavelength at 3rd Harmonics is mathematically given by

 [tex]\lambda_3=\frac{4}{3}l[/tex]

Therefore

 [tex]F_3=\frac{3v}{4l}[/tex]

Generally the equation for Wavelength at 1st Harmonics is mathematically given by

 [tex]\lambda_1=\frac{4}{1}l[/tex]

Therefore

 [tex]F_1=\frac{v}{4l}[/tex]

Generally the equation for the frequency of the first harmonic is mathematically given by

 [tex]F_1=\frac{F_3}{3}[/tex]

 [tex]F_1=\frac{1100}{3}[/tex]

 [tex]F_1=366.67Hz[/tex]

Answer:

To draw the resultant vector, join the tail of the first vector with the second vector's head and put the arrowhead. To determine the magnitude, measure the length of resultant R, and to find out the direction, measure the angle of the resultant with the x-axis.