Can the potential of a non-uniformly charged sphere be the same as that of a point charge? Explain.

Answer:

\(F_l=1140N\)

Explanation:

From the question we are told that:

Length\(l=3.00m\)

Support distance \(d=1.00m\)

Weight of diver \(W_d=500N\)

Weight of board \(W_b=280N\)

Generally the equation for Total Torque is mathematically given by

 \(F_T=W_d-W_b\)

 \(F_T=F_d-f_b\)

 \(F_T=-280-500\)

 \(F_T=-780\)

 \(F_T=780\)

Since we consider the horizontal axis

 \(\sum Y=0\)

 \(Fs-(\frac{1}{2}l*w_b)-(l-w_d)\)

 \(Fs-1.5*280-3*300=0\)

 \(F_s=1920N\)

Therefore  the force at the support point  1.00m from the force at the left-hand

 \(F_l=F_s-F_l\)

 \(F_l=1920-780\)

 \(F_l=1140N\)

Answer:Since pressure = force/area, the same force on a smaller area means more pressure. When you are walking on sand, the force being applied by your body is spread out over the entire surface of your foot. ... So, more pressure applied on a given area of your foot causes more pain.

Explanation:

Good Question

Answer:

The US Environmental Protection Agency (EPA) sets limits for exposure to x-rays and gamma rays in part because it recognizes that this form of radiation can cause cancer.

Explanation:

Humans  must limit their exposure to X-rays and gamma rays because these rays have huge penetrating power and it may ionize our body which may lead to cancer.

The amount of radiation received, or the absorbed dose, which is measured in a unit called the grey (Gy), determines whether or not tissue and/or organs will be damaged by radiation. The radiation type and sensitivity of various tissues and organs determine the possible harm from an absorbed dosage.

The ability of ionizing radiation to harm people is measured using the effective dosage. The unit of effective dose that takes into account the radiation type and sensitivity of tissues and organs is the sievert (Sv). It is a method for gauging the danger potential of ionising radiation. The Sv considers the radiation type and the sensitivity of tissues and organs.

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First option is correct.Larry the Rock is going through Static Equilibrium.

In this situation, Larry is at rest and remains stationary despite the forces acting on him. While David and Pancho are exerting equal forces from opposite sides, their forces cancel each other out, resulting in a net force of zero. As a result, Larry does not move or experience any acceleration.

Static equilibrium occurs when an object's forces and torques balance each other, leading to a stable, balanced state. In this case, the forces exerted by David and Pancho are equal in magnitude and opposite in direction, creating a condition where the resultant force is zero. As a result, Larry remains in a state of rest, unable to experience any movement or acceleration.Therefore, the type of equilibrium that Larry the Rock is going through is Static Equilibrium.

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Answer:i believe the answer is d: a motion force

Explanation:

Answer:

Question 5: The period of the waves is the time it takes for one complete up-and-down cycle of the boat.

In this case, the boat bobs up and down 10 times in 8 seconds.

Therefore, the time it takes for one up-and-down cycle is:

8 seconds ÷ 10 cycles = 0.8 seconds

So the period of the waves is 0.8 seconds.

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Question 6 : The frequency of the waves is the number of complete up-and-down cycles per unit time, typically measured in Hertz (Hz).

In this case, the boat bobs up and down 10 times in 19 seconds.

Therefore, the frequency of the waves is:

Frequency = Number of cycles ÷ Time

Frequency = 10 cycles ÷ 19 seconds

Frequency ≈ 0.526 Hz

So the frequency of the waves is approximately 0.526 Hz.

Answer: Liquid 1 heats more slowly than 2

Explanation:

Liquid 1 heats more slowly than 2 because it has a higher specific heat.

(Hope this helps!)

Answer:

f = 8 N

Explanation:

Data provided in the question

Radius of the pulley  = r = 0.05 m

Moment of inertia = (I) = 0.2 kg.m^{2}

Angular acceleration = ∝ = 2 rad/sec

Based on the above information

As we know that

Torque is

\(= force \times radius\)

\(= f \times r\)

And,

Torque is also

\(= moment\ of\ inertia \times angular\ acceleration\)

\(= I \times \alpha\)

So,

We can say that

\(f \times r = I \times \alpha\)

\(f \times 0.05 = 0.2 \times 2\)

0.05f = 0.4

f = 8 N

We simply applied the above formulas

Answer:

1080J

Explanation:

Given parameters:

Mass of object  = 2kg

Velocity  = 10m/s

Height  = 50m

Unknown:

Total energy  = ?

Solution:

The total energy of the moving object is obtainable by summing the kinetic and potential energy;

       Total energy  = P.E + K.E

P.E is the potential energy  = mgh

K.E is the kinetic energy = \(\frac{1}{2}\)mv²

 Now insert the parameters and solve;

    Total energy  = mgh +  \(\frac{1}{2}\)mv²

m is the mass

g is the acceleration due to gravity

h is the height

v is the velocity

  Total energy  = (2 x 9.8 x 50) +  ( \(\frac{1}{2}\) x 2 x 10²)

  Total energy  = 980 + 100 = 1080J

Answer: 25230800 Joules

Explanation: We can treat the copper tank and the water inside as two different objects since they have different specific heats. We will utilize Q=Mcdelta(t) in this problem where M is mass, c is specific heat, and delta t is the change in temperature.

Since we are treating the copper and water separately we can make a Mcdelta(t) for each one of them. This gives us Q=(mass of copper)(specific heat of copper)(delta(t))+(mass of water)(specific heat of water)(delta(t)). The delta t will be the same because both the copper and water are at 15 celsius. Now we just do some calculations.

Q=(mass of copper)(specific heat of copper)(delta(t))+(mass of water)(specific heat of water)(delta(t))

Q=(20)(385)(55-15)+(150)(4200)(55-15)

Q=30800+25200000

Q=25230800 J

This number may seem absurdly high but there is 150 kg of water being heated up which is 150 liters(A LOT!).

Hope this helps!

During the nuclear change we can expect to see different chemical symbols before and after the change

Chemical and nuclear reactions are quite different from one another. Atoms can share electrons with other atoms or participate in an electron transfer to increase their stability in chemical reactions. In nuclear reactions, the atom's nucleus stabilizes itself by going through some sort of alteration. Compared to the energies involved in chemical reactions, the energies produced in nuclear reactions are many orders of magnitude higher. Environmental factors like temperature or pressure do not significantly affect nuclear reactions like they do with chemical ones.

Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei

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Answer:

Neutronic is not a defined type of energy.

Yellow light is produced by combining red and green lights. The counterpart of blue light with yellow light is blue light combined with red lights. Three basic colours of light are combined to produce white light.

Blue light can be absorbed by a yellow pigment. So light that shines just on paper is therefore depleted of blue. Red light is now gone. The paper will seem red if it reflects the red light.

White light causes an object to seem blue since it reflects just blue light and absorbs all other colours. Since there isn't any colour to reflect whenever that object is placed in red light, it absorbs all of the red light that strikes it and appears black.

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The differential in air pressure on the ball's various sides allows a spinning ball to provide more lift than a non-spinning ball, in accordance with Bernoulli's principle.

According to Bernoulli's principle, the pressure of a fluid decreases as the fluid's velocity increases. A ball is pushed in the opposite direction by a force produced by lower pressure, possibly producing more lift.

The lift is given to the ball by the air because the right side air moves in the same direction of the motion of the ball while the lift side goes into the opposite direction that creates a difference in the air pressure and more lift is the result.

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Answer:

356°C.

Explanation:

(1). The first step to the solution to this particular Question/problem is to determine the Biot number, and after that to check the equivalent value of the Biot number with plate constants.

That is, Biot number = (length × ∞)÷ thermal conductivity. Which gives us the answer as ∞. Therefore, the equivalent value of the ∞ on the plates constant = 1.2732 for A and 1.5708 for λ.

(2). The next thing to do is to determine the fourier number.

fourier number = [α = 97.1 × 10−6 m2/s × 15 s] ÷ (.05m)^2 = 0.5826.

(3). The next thing is to determine the temperature at the center plane after 15 s of heating.

The temperature at the center plane after 15 s of heating = 500°C [ 25°C - 500°C ] [1.2732] × e^(-1.5708)^2 ( 0.5826).

The temperature at the center plane after 15 s of heating = 356°C.

The time takes  is 1.19 ms for the sound waves to travel the length of the aluminum rod between the two houses.

The speed of sound in aluminum can be determined utilizing the condition

v = sqrt(Y/ρ),

where Y is the Youthful's modulus and ρ is the thickness of the material. Connecting the qualities for aluminum, we get

v = \(sqrt(6.9x10^10 N/m^2/2700 kg/m^3) = 5110 m/s\).

The time it takes for the sound waves to venture to every part of the length of the aluminum pole can be determined utilizing the condition

t = d/v,

where d is the distance and v is the speed of sound. Connecting the qualities, we get

t = 6.1 m/5110 m/s = 0.00119 s or 1.19 ms.

Subsequently, it takes 1.19 ms for the sound waves to venture to every part of the length of the aluminum bar between the two houses.

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Answer:

For B it is 0

Explanation:

I think

Answer: A

Explanation:

Isotopes of different elements differ by the number of neutrons inside the nucleus.

The isotope of uranium-238 is different from the isotope uranium-235 by number of neutrons in the nucleus.

Isotopes are two or more types of atoms that have the same atomic number and position in the periodic table, and that differ in nucleon numbers due to different numbers of neutrons in their nuclei.

Uranium-238 is the most common isotope of uranium found in nature, with a relative abundance of 99%. It can be used for radiation shielding or as projectiles in armor-piercing weapons.

Uranium-235 is the only naturally occurring fissile isotope, which makes it widely used in nuclear power plants and nuclear weapons.

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Answer:  

Explanation:

Step one:

given data

period T= 3 milliseconds= 0.003

velocity v= 175m/s

wave lenght λ=?

Step two:

we know that f=1/T

the expression relating period and wave lenght is

v=λ/T

λ=v*T

λ=175*0.002

λ=0.525m

to cm= 0.525*100

=52.5cm

The wavelength of the wave is E) 52.5 cm

Answer: 2, -2

Explanation:

5th answer: Slop= (9-1)÷(5-1) = 2

6th answer: Slop= (6-0)÷(-3-0) = -2

The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

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Answer:

The ability to do work

Explanation:

Energy can be defined as the ability to do work. We apply energy in basically everything we do in life, energy is needed to walk or move from one position to another, it is required to eat and do other basic things of life. The body system converts the food that is being consumed into energy, this energy can be switched from one form to another.

There are various forms of energy which include solar energy , wind energy, electrical energy, mechanical energy, kinetic energy, potential energy etc. This forms of energy can be converted from one form to anothe but cannot be destroyed.

Answer:

ability to work

Explanation:

Answer:

250,000

Explanation:

\(3.20×10^7\:\text{m/s}\)

Explanation:

Let

\(L = 28.2\:\text{m}\)

\(L' = 28.2\:\text{m} - 0.161\:\text{m} = 28.039\:\text{m}\)

The Lorentz length contraction formula is given by

\(L' = L\sqrt {1 - \left(\dfrac{v^2}{c^2}\right)}\)

where L is the length measured by the moving observer and L' is the length measured by the stationary Earth-based observer. We can rewrite the above equation as

\(\sqrt {1 - \left(\dfrac{v^2}{c^2}\right)} = \dfrac{L'}{L}\)

Taking the square of the equation, we get

\(1 - \left(\dfrac{v^2}{c^2}\right) = \left(\dfrac{L'}{L}\right)^2\)

or

\(1 - \left(\dfrac{L'}{L}\right)^2 = \left(\dfrac{v}{c}\right)^2\)

Solving for v, we get

\(v = c\sqrt{1 - \left(\dfrac{L'}{L}\right)^2}\)

\(\:\:\:\:=(3×10^8\:\text{m/s})\sqrt{1 - \left(\dfrac{28.039\:\text{m}}{28.2\:\text{m}}\right)^2}\)

\(\:\:\:\:=3.20×10^7\:\text{m/s} = 0.107c\)

Answer:

12.34 N

Explanation:

Work Done = Force × Displacement

1234 = Force × 100

Force = 12.34N

Answer:

Heat flow is the movement of heat.

Explanation:

Heat flows in solids by conduction, which occurs when two objects in contact with each other transfer heat between them. That happens because the molecules hit each other, and the faster moving molecules in the hot object spread that energy into the cooler object

Credit to, https://study.com/academy/lesson/heat-flow-in-solids-fluids.html

We will have the following:

We will have that the expression that will give as solution the approximate angle is:

[First option].

***Explanation***

We know that the final vector will have two components, one on x and one on y.

Now, we know that the x-component is:

And we know that the y-component is: