Four students give their teacher identical apples. Each student sets his or her apple on a different stack of books. Which
apple has the most potential energy?

Answer:

Well we all know that bread and cake taste different. We do this on purpose.

Explanation:

When we make cake we add plenty of sugar to make it the delectable dessert we all know and love while when making bread we focus more on the corn starch and yeast's.

Answer:

What’s the question??

Explanation:

Answer:

1. (b) 2.5 eV

2. (c) 430000 m/s

3. (a) The maximum velocity of any ejected electrons will decrease.  

Explanation:

1)

From Einstein's Photoelectric Equation:

hc/λ = K.E + ∅

∅ = hc/λ - K.E

∅ = hc/λ - eV

where,

e = charge on electron = 1.6 x 10⁻¹⁹ C

V = Stopping Potential = 0.52 volts

h = 6.625 x 10⁻³⁴ J.s

c = speed of light = 3 x 10⁸ m/s

λ = wavelength = 405 nm = 4.05 x 10⁻⁷ m

∅ = Work Function = ?

Therefore,

∅ = (6.625 x 10⁻³⁴ J.s)(3 x 10⁸ m/s)/(4.05 x 10⁻⁷ m) - (1.6 x 10⁻¹⁹ C)(0.52 volts)

∅ = 4.9 x 10⁻¹⁹ J - 0.832 x 10⁻¹⁹ J

∅ = (4.075 x 10⁻¹⁹ J)(1 eV)/(1.6 x 10⁻¹⁹ J)

∅ = 2.5 eV

therefore, correct answer is"

(b) 2.5 eV

2)

K.E = (1/2)mv² = eV

where,

m = mass of electron = 9.1 x 10⁻³¹ kg

v = speed = ?

therefore,

(1/2)(9.1 x 10⁻³¹ kg)v² = (1.6 x 10⁻¹⁹ C)(0.52 volts)

v = √(0.18 x 10¹² m²/s²)

v = 0.43 x 10⁶ m/s = 430000 m/s

Correct option is:

(c) 430000 m/s

3.

The decrease in power at constant wavelength means decrease in voltage, that results in the decrease of kinetic energy of electrons. So, correct option is:

(a) The maximum velocity of any ejected electrons will decrease.

Answer:

P = 180 [w]

Explanation:

To solve this problem we must use ohm's law, which is defined by the following formula.

V = I*R & P = V*I

where:

V = voltage = 200[volts]

I = current [amp]

R = resistance [ohm]

P = power [watts]

Since the bulbs are connected in series, the powers should be summed

P = 60 + 60 + 60

P = 180 [watts]

Now we can calculate the current

I = 180/200

I = 0.9[amp]

Attached is an image where we see the three bulbs connected in series, in the circuit we see that the current is the same for all the elements connected to the circuit.

And the power is defined by P = V*I

we know that the voltage is equal to 200[V], therefore

P = 200*0.9

P = 180 [w]

Answer:

Explanation:

BAHAHAHAH karely omg HAHAHA un idke

Answer:

T₂ is greater than T₁ by an amount independent of velocity

Explanation:

This is an exercise on Newton's second law

for block of mass m1

            T₁ = m₁ a

for block of mass m²

            T₂ = m₂ a

as it indicates that m₂> m₁

the tension T₂> T₁ also we see that in this equation there is no dependence with the velocity, but with the acceleration

the voltage difference does not depend on the speed of the vehicles

When reviewing the answers, the correct one is B

    T₂ is greater than T₁ by an amount independent of velocity

+500   because North is postiive direction

-300 because if you see it as a graph, left side is negative

-800 because South is downward

500-300-800 = -600

displacement is a vector, meaning it has both DIRECTION and magnitude

(literally the only physics problem i can easily solve lol)

Answer:

[tex]\mid D \mid = 424.26\ m[/tex]

Explanation:

Displacement

Suppose a moving object starts from point A and travels through a determined path to point B. The distance is the sum of all the partial distances traveled, and the displacement is the vector directed from A to B.

The path of the person is shown in the image below. Note the 500 m due north and the 800 m due south produce a distance of 300 m due south. The displacement vector D is the resultant of the whole movement.

To find the magnitude of the displacement, we need to calculate the hypotenuse of a triangle of sides 300 m (already described) and 300 m, marked in red.

The magnitude of D is:

[tex]\mid D \mid = \sqrt{300^2+300^2}[/tex]

[tex]\mid D \mid = \sqrt{90000+90000}[/tex]

[tex]\mid D \mid = \sqrt{180000}[/tex]

[tex]\mid D \mid = 424.26\ m[/tex]

Answer:

B.  a hearing by a federal court of appeals

If any state tribunal decides a federal question and the litigant has no further remedy within the state court system, a hearing by a federal court of appeals.

Oral argument in the court of appeals is a prearranged conversation between the judges and the appellate attorneys that focuses on the legal principles at issue. Each party has a limited amount of time usually around 15 minutes to make their case to the judge.

If a litigant loses in a federal court of appeals or in the highest court of a state, they may ask the supreme court to reconsider the case by filing a petition.

Only when a case concerns an extremely significant legal concept or when two or more federal appellate courts have disagreed on how to interpret a statute will the court normally consent to consider it. Additionally, there are a few rare instances where the Supreme Court is mandated by the law to consider an appeal.

Find more on federal court :

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Answer: 30.641

Explanation: If you get the ave which is 38.0 then the vi which is 7.359

38.0-7.359=30.641/0.0 which is 30.641

Answer:

74 N to the right

Explanation:

the forces are going in opposite horizontal directions, meaning that they are directly opposing each other. this means that you can subtract the force applied in the direction that is greater from the direction that is less to get the net force for the greater direction

this means 182 N - 108 N = 74 N to the right

In a game of tug of war the magnitude and direction of the net horizontal force on the rope is 74 N.

A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

In a game of tug of war, a rope is pulled by a force of 182 N to the right and by a force of 108 N to the left. The magnitude and direction of the net horizontal force on the rope is,

F = 182 - 108

F = 74 N

The magnitude and direction of the net horizontal force on the rope is  74 N.

To learn more about force refer to the link:

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Answer:

D. an ellipse with the Sun at one focus

Explanation:

Based on Kepler's work, the orbit of a planet around the Sun is an ellipse with the Sun at one focus.

Hence according to Kepler's first law of planetary motion, the orbit of a planet around the Sun is an ellipse with the Sun at one focus.

Find more about planetary motion refer the link:

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Answer:

it's a Bugatti

Explanation:

I seen pictures and videos of one for what they look like from the inside or the outside

Answer:

90

Explanation:

ark

sepupugxuxoxcjxxhchhchc

bkfjffy

Answer:

λ₀= 495.88 nm

Explanation:

To analyze this constructive interference interference experiment by reflection, let's look at two important aspects:

* when a ray of light passes from a medium with a lower index, they refact to another medium with a higher index, the reflected ray has a phase difference of pyres

* When a beam penetrates a material medium, the wavelength of the radiation changes according to the refractive index of the material.

       λₙ = λ₀ / n

when we introduce these aspects in the expression of contributory interference, it remains

        2 d sin θ = (m + ½) λ₀ / n

In general, reflection phenomena are measured at an almost normal angle, whereby θ = π/2  and sin θ = 1

        2 d = (m +1/2) λ₀/ n

         2n d = (m + ½) λ₀

Let's apply this expression to our case

         d = (m + ½) λ₀ / 2n

Suppose we measure on the first interference, this is m = 0

         d = ½ λ₀ / 2n

let's calculate

         d = ½ 496 10⁻⁹ / (2 2.30)

         d = 53.9 10-9 m  

This is the thickness of the glass, the next wavelength that gives constructive interference is

          λ₀ = 2 n d / (m + ½)

let's calculate

          λ₀ = 2 2.3 5.39 10-8 / (1 + ½)

          λ₀= 4.9588 10-7 m

          λ₀= 495.88 nm

Answer:

your answer is wavelength

Explanation:

the the highest service part of a weight is called the crest and the lowest part is the trough the vertical distance between the crest and the trough is the waist height the horizontal disc distance between two adjacent Crest or troughs is known as wavelengths

Answer:

c,B,a,d i guess i m not sure it is the guessing

Answer:

28230 joules

Explanation:

becasue yes

Answer:

the mug will moveforwards

Answer:

B . a heat transfer caused

Answer:

The  dimension is  [tex]D =  L ^{2} T^{-1}[/tex]

Explanation:

From the question we are told that

     [tex]J  =  -D \frac{dn}{dx}[/tex]

Here  [tex][J] = \frac{1}{L^2 T}[/tex]

       [tex][n] =\frac{1}{L^3}[/tex]

        [tex][x] = L[/tex]

So

    [tex]\frac{1}{L^2 T} =  -D \frac{d(\frac{1}{L^3})}{d[L]}[/tex]

Given that the dimension represent the unites of  n and  x then the differential  will not effect on them

So

[tex]\frac{1}{L^2 T} =  -D \frac{(\frac{1}{L^3})}{[L]}[/tex]

=>   [tex]D =  \frac{L^{-2} T^{-1} * L }{L^{-3}}[/tex]

=>   [tex]D =  L ^{2} T^{-1}[/tex]

Answer:

The total surface area of the seven little spheres is 1.91 times the total surface area of the bigger sphere.

Explanation:

Volume of a Sphere

The volume of a sphere of radius r is given by:

[tex]\displaystyle V=\frac{4}{3}\cdot \pi\cdot r^3[/tex]

The volume of each little sphere is:

[tex]\displaystyle V_l=\frac{4}{3}\cdot \pi\cdot 2^3[/tex]

[tex]V_l=33.51\ mm^3[/tex]

When the seven little spheres coalesce, they form a single bigger sphere of volume:

[tex]V_b=7*V_l=234.57\ mm^3[/tex]

Knowing the volume, we can find the radius rb by solving the formula for r:

[tex]\displaystyle V_b=\frac{4}{3}\cdot \pi\cdot r_b^3[/tex]

Multiplying by 3:

[tex]3V_b=4\cdot \pi\cdot r_b^3[/tex]

Dividing by 4π:

[tex]\displaystyle \frac{3V_b}{4\cdot \pi}= r_b^3[/tex]

Taking the cubic root:

[tex]\displaystyle r_b=\sqrt[3]{\frac{3V_b}{4\cdot \pi}}[/tex]

Substituting:

[tex]\displaystyle r_b=\sqrt[3]{\frac{3*234.57}{4\cdot \pi}}[/tex]

[tex]r_b=3.83\ mm[/tex]

The surface area of the seven little spheres is:

[tex]A_l=7*(4\pi r^2)=7*(4\pi 2^2)=351.86\ mm^2[/tex]

The surface area of the bigger sphere is:

[tex]A_b=4\pi r_b^2=4\pi (3.83)^2=184.33\ mm^2[/tex]

The ratio between them is:

[tex]\displaystyle \frac{351.86\ mm^2}{184.33\ mm^2}=1.91[/tex]

The total surface area of the seven little spheres is 1.91 times the total surface area of the bigger sphere.

Recall that

v² - u² = 2 a ∆x

where u and v are initial and final velocities, respectively; a is acceleration; and ∆x is the change in position.

We can use this formula to determine the launch speed of the ball. In the vertical direction, the ball has acceleration g in the downward direction, where g = 32.2 ft/s². At its maximum height, the ball has 0 vertical velocity. So we have

0² - u² = 2 (-32.2 ft/s²) (40 ft)

==>  u ≈ 50.75 ft/s

Now, the ball's height y at time t is given by

y = u t - 1/2 g t²

Find at which time t the ball covers the first 20 ft of its trajectory:

20 ft = (50.75 ft/s) t - 1/2 g t²

==>  t ≈ 0.462 s

(there is a second solution, t ≈ 2.69 s, which corresponds to the time it takes for the ball to return to this height as it's falling back down)

During this first interval, the ball's horizontal position x is

x = (20 mph) t ≈ (29.33 ft/s) t

so that at the moment the ball reaches a height of 20 ft, it will have moved

x = (29.33 ft/s) (0.462 s) ≈ 13.5 ft

to the right. (So we've take the right to be positive and the left to be negative.)

In the upper half of its trajectory, when the wind changes direction, the ball's horizontal position is given by

x = 13.5 ft - (29.33 ft/s) t

Note that t = 0 here means we now take the ball's current position to be the "initial" one. So the time we found earlier for when the ball has a height of 20 ft as it's falling back down is actually t = 2.69 s - 0.462 s ≈ 2.23 s. At this point, the ball's horizontal position is

x = 13.5 ft - (29.33 ft/s) (2.69 s - 0.462 s) ≈ -51.8 ft

or about 51.8 ft to the left of where it started.

The wind changes direction again, so that the ball's position at time t is now

x = -51.8 ft + (29.33 ft/s) t

Solving y = 0 for t gives the time when the ball reaches the ground:

0 = (50.75 ft/s) t - 1/2 g t²

==>  t ≈ 3.15 s

Again, this is the time it takes for the ball to reach the ground since it was launched, while the position function takes t = 0 to refer to the moment the ball is 20 ft above the ground. So once it hits the ground, it will be

x = -51.8 ft + (29.33 ft/s) (3.15 s - 2.69 s) ≈ -38.3 ft

which means the ball lands on the ground about 38.3 ft to the left of where it started.

Answer:

a

[tex]T_2 =  276.1 \ K[/tex]

b

  [tex]V_2  = 2.13 *10^{3} \ m^3 [/tex]

c

   [tex]\Delta U =  -1.25 *10^{7} \  J  [/tex]

Explanation:

From the question we are told that

  The  volume of the balloon is  [tex]V  =  2.00 * 10^3 \ m^3[/tex]

   The  pressure of  helium is  [tex]P_1 =   1.00 \ atm=  1.0 *10^{5} \  Pa [/tex]

   The  initial  temperature is  [tex]T_1   =  15.0^oC =  288 \  K [/tex]

   The  pressure of  atmosphere is [tex]P_a  =  0.900 \ atm[/tex]

 Generally the equation representing the  adiabatic process is mathematically represented as

      [tex]P_1 V_1 ^{\gamma }=  P_2 V_2 ^{\gamma }[/tex]

=>    [tex]V_2 ^ {\gamma } =  \frac{ V_1 ^{\gamma } *  P_1 }{P_2}[/tex]

Generally [tex]\gamma[/tex] is a constant with value [tex]\gamma  =\frac{5}{3}[/tex] for an ideal  gas

So  

     [tex]V_2 ^ {\frac{5}{3} } =  \frac{ ( 2.0 *10^{3}) ^{ \frac{5}{3}  } *   1.00 }{0.900}[/tex]

        [tex]V_2  =  (\sqrt[5]{103.14641852} )^3[/tex]

=>      [tex]V_2  = 2.13 *10^{3} \ m^3 [/tex]

Generally the adiabatic process can also be mathematically represented as

     [tex]T_1 V_1 ^{\gamma -1 } = T_2 V_2^{\gamma -1 }[/tex]

=>  [tex]T_2  =  288 *  [\frac{2 *  10^{3}}{ 2.13 *10^{3}} ]^{ \frac{5}{3} -1 }[/tex]

=>    [tex]T_2 =  276.1 \ K[/tex]

Generally the ideal gas equation is mathematically represented as

        [tex]P_1 V_1 = nRT_1[/tex]

Here  R is the  gas constant with value  [tex]R  =  8.314\  J  /mol \cdot  K[/tex]

     [tex]n  =  \frac{P_1 V_1 }{RT _1}[/tex]

=>  [tex]n  =  \frac{1.0 *10^{5} *  2.0 *10^{3}}{8.314 * 288[/tex]

=>  [tex]n  =  84362 \  mol[/tex]

Generally change in internal energy i mathematically represented  

        [tex]\Delta U =  n C_v  \Delta  T[/tex]

Here  [tex]C_v[/tex] is  the  specific heats of gas at constant volume and the value is  [tex]C_v  =  12.47 J/mol \cdot  K[/tex]

         [tex]\Delta U =  84362 *   12.47 * [T_2 - T_1 ]  [/tex]

         [tex]\Delta U =  84362 *   12.47 * [276.1 - 288 ]  [/tex]

          [tex]\Delta U =  -1.25 *10^{7} \  J  [/tex]

Answer:

Mass

axis

distance

intertia

Answer: The answer is a

Explanation:

Answer:

Object A runs into Object B. The force that object A has will transfer from Object A to Object B. But during this transfer you will loose some energy, therefore object B will not travel as fast.

Explanation:

Answer:

P=2940 Pa

Explanation:

Given that,

Side of a cube, a = 12 cm

It is submerged to  depth of 30 cm

The density of water, d = 1000 kg/m^3

We need to find the pressure at the bottom surface of the cube. We know that the pressure exerted is given by :

[tex]P=d gh\\\\P=1000\ kg/m^3\times 9.8\ m/s^2\times 0.3\ m\\\\P=2940\ Pa[/tex]

So, 2940 Pa of pressure is exerted at the bottom surface of the cube due to water.​