a 19.3-g mass of gold in the form of a cube is 1 cm long on each side (somewhat smaller than a sugar cube). what would be the length of the sides of the cube that has twice the mass of gold?

Answer:

Speeds up at a negative direction

Explanation:

Answer:

Presión = 175,97 N/m²

Explanation:

Dados los siguientes datos;

Peso del alumno (fuerza) = 725N

Área de zapatos = 412 cm² a metros cuadrados = 412/100 = 4.12 metros

Para encontrar la presión, usaríamos la siguiente fórmula;

Presión = fuerza / área

Presión = 725 / 4.12

Presión = 175,97 N/m²

Answer:

Container 1

Explanation:

The reason why there will be less pressure in container 1 is that it's colder than container 2. You must have learned right, that a colder thing has its molecules less moving, and they don't expand, instead they actually decrease in volume? In the same way, it's applied to gas also. So that's why, because container 1 has 15C temperature, which is half less than container 2's 30C, that's why, container 1 has less pressure than Container 2.

So hence, container 1 has less pressure than container 2 because of its a lower temperature, which doesn't make the molecules expand, and move around that much.

THANKS!

Answer:

Explanation:

What is a free body diagram?

Answer: a force diagram is a graphical illustration used to visualize the applied forces and resulting reactions on a body in a given condition

Drawing a free-body diagram for this problem

Answer: Look at the attached picture, ask me any questions if you are still confused. It is a little messy since I didn't have my pen.

Find its weight on Earth

Answer: The weight is dependent on the mass of the object and the gravitational constant on the planet. The gravitational constant, in this case, is 9.8.

   so the weight = mass * gravitational constant = m * g = 1000 * 9.8

                          = 9800 N

Hope that helps!

Answer:

The power rating of the coffee maker is 1.4 kW, which means that it uses 1.4 kilowatts of power when it is in operation. To find out how much energy it will transfer every second, we can use the formula:

Energy transferred = Power × Time

Since we want to know the energy transferred every second, we can set the time to 1 second. Therefore:

Energy transferred per second = Power × 1 second

Energy transferred per second = 1.4 kW × 1 second

We can simplify this by converting the unit of power from kilowatts to watts:

Energy transferred per second = 1,400 watts × 1 second

Energy transferred per second = 1,400 joules

Therefore, the coffee maker will transfer 1,400 joules of energy every second.

The true statement about an orbit is that the sun and a planet are at the two foci of an orbit. Hence, option B is correct.

An orbit is a curved path taken by an object in celestial mechanics, such as the path taken by a planet around a star, a natural satellite around a planet, or an artificial satellite around an object or location in space, such as a planet, moon, asteroid, or Lagrange point.

Ordinarily, the term "orbit" refers to a trajectory that repeats itself periodically, though it can also apply to a non-repeating trajectory. Kepler's principles of planetary motion roughly predict that planets and satellites have elliptic orbits, with the center of mass orbiting at a focal point of the ellipse.

Hence, this concludes that option B is correct.

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Answer:

Answer choice B!

Explanation:

Study Island work

Answer:A

I DID THIS ON STUDYILSLAND

(1.) The Phenomena of Refraction Occurs when a Ray (Here Light) enters a Relatively Denser or Rarer Medium and Due to the Change in Density, the Speed of the Incident Ray Decreases or Increases Respectively.

(2.) If a light ray projected through a diamond, the light would refract drastically.

Answer:

The momentum of bike is more.

Explanation:

Given that,

Mass of the kid, m = 100 kg

Speed of the bike, v = 10 m/s

The momentum of the kid is given by :

p = mv

So,

p = 100 kg × 10 m/s

p = 1000 kg-m/s

Mass of the truck, m = 5000 kg

Speed of the truck, v = 0.1 m/s

The momentum of the truck is given by :

p = 5000 kg × 0.1 m/s

= 500 kg-m/s

So, the momentum of the kid riding a bike is more than that of the truck.

What do you mean by electromagnetic induction ?

Discovery : -

A British scientist Michael Faraday and an American scientist Joseph Henry discovered the phenomenon of electromagnetic induction in 1831 independently.

Definition / Meaning : -

The production of electricity from magnetism is called electromagnetic induction.

Or ,

Electromagnetic induction is the phenomenon of the production of an induced current in a coil placed in a region where the magnet field changes with time

For Example : -

(i) If a bar magnet is moved in and out of coil of wire , even then an electric current is produced. This is an example of electromagnetic induction.

(ii) Another example , when a straight wire is moved up and down rapidly between the two poles of a horseshoe magnet , then an electric current is produced in the wire. This is also an example of electromagnetic induction .

Electromagnetic induction denotes to producing electricity using magnetic field or magnetism.

This is the process or phenomenon of production of induced induced current in a region where magnetism changes with respect to the time.

It was discovered by great scientist Michael Faraday.

Answer:

14,400m

Explanation:

The formula for calculating speed is S=D/T.

S=speed( in meters per second- m/s)

D=distance(in meters)

T=time( in seconds)

For our case:

S=40m/s

D=?

Time=2 hours=60min x 60 sec=3600seconds

Now make D the subject.

D=S x T

D=4m/s x 3600s=14,400m

Therefore our answer is

14 400 m or 14.4 km

In a Michelson interferometer, light of wavelength 632.8 nm from a He-Ne laser is used. When one of the mirrors is moved by a distance d, 8 fringes move past the field of view.

The electric field in a parallel plate capacitor has a magnitude of 1.40 x 10^4 V/m.

The electric field in a parallel plate capacitor is given by the formula

E = σ / ε0where E is the electric field, σ is the surface charge density, and ε0 is the permittivity of free space.

σ = ε0 x E

E = 1.40 x 10^4 V/m (given)

ε0 = 8.85 x 10^-12 C^2/Nm^2 (given)

σ = ?Plugging in the values we get,

σ = ε0 x E

= 8.85 x 10^-12 x 1.40 x 10^4

= 1.239 x 10^-7 C/m^2

Therefore, the surface charge density on the positive plate is 1.239 x 10^-7 C/m^2.

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The mass transfer rate of iodine in this flow is approximately 0.0052 kg/s.

Assuming that the concentration of iodine in the air is constant and uniform, we can use Fick's law of diffusion to calculate the mass flux:

J = -D (dC/dx)

where J is the mass flux in kg/(m²·s), D is the diffusion coefficient in m²/s, C is the concentration of iodine in kg/m³, and x is the distance in meters.

The diffusion coefficient for iodine in air at room temperature is approximately 1.16 × 10^-5 m²/s.

Assuming that the flow is fully developed and laminar, we can use the Hagen-Poiseuille equation to calculate the volumetric flow rate:

Q = (π/4)D²v

where Q is the volumetric flow rate in m³/s, D is the diameter of the pipe in meters, and v is the velocity of the flow in m/s.

Substituting the given values,

Q = (π/4)(0.03 m)²(5.25 m/s) ≈ 0.0043 m³/s

To convert the volumetric flow rate to a mass flow rate, we need to multiply by the density of the air. Assuming that the air is at room temperature and atmospheric pressure, we can use the ideal gas law to calculate the density:

ρ = P/(RT)

where ρ is the density in kg/m³, P is the pressure in Pa, R is the gas constant, and T is the temperature in Kelvin.

Substituting the values for room temperature and atmospheric pressure, we get:

ρ = (101325 Pa)/[(8.314 J/(mol·K))(293 K)] ≈ 1.20 kg/m³

Multiplying the volumetric flow rate by the density, we get:

ṁ = Qρ ≈ 0.0052 kg/s

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The height of the image is 0.54cm

To solve this problem, we employ the thin lens equation:

1/f = 1/do + 1/di

where f denotes focal length, di denotes image distance, and do denote object distance.

We begin by solving for di, which gives us the image distance and height:

1/di = 1/f - 1/do

Substituting the values from the problem yields:

1/di = 1/-5 - 1/25

1/di = -0.2

di = -5 cm

The image is virtual and vertical, as indicated by the negative sign above.

The magnification formula can then be used to get the image height:

m = -di/do

Substituting the values yields:

m = -(-5)/25 = 0.2

Because the image is virtual, we ignore the negative sign above and take the absolute value of magnification:

|m| = 0.2

Lastly, the image height is calculated by multiplying the object height by the magnification:

|m| x object height = image height

height of image = 0.2 x 2.7 cm

Height of image = 0.54 cm

As a result, the image height is 0.54 cm.

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Explanation:

If they are in a series circuit they just add together

 Rtotal = R1   + R2   + R3  

      there is some small resistance in the ammeter  and the battery too (these would add to the total ) if you want to be totally correct.

Using the information depicted on the distance - time graph, the slope of the graph is could be used to infer the velocity of each cyclist. Hence, cyclist A and B do not have the same velocity at 3 seconds.

The steepness of slope on the distance - time graph gives the velocity of the cyclist. At time, t = 0 ; the cyclist A has a greater slope than cyclist B. Hence, the velocity of the cyclists is different.

Therefore, the cyclists do not have the same velocity at time, t = 3 seconds.

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Answer:

See the answer below

Explanation:

According to Amonton's law, the pressure of a gas is directly proportional to the temperature of its molecules given that the volume remains constant.

Hence, if the temperature of a tyre increases, heat is transferred to the air molecules within the tyre leading to an increase in the air temperature. The air thus exerts more pressure on the tyre in agreement with Amonton's law.

The energy of an object in motion is called kinetic energy

Kinetic energy is defined as the energy possessed by an object due to its motion. The amount of kinetic energy an object has is directly proportional to its mass and the square of its velocity. Mathematically, the formula for kinetic energy is:

Kinetic energy = 1/2 x mass x velocity^2

Where:

Mass (m) is the mass of the object in kilograms (kg)

Velocity (v) is the velocity of the object in meters per second (m/s)

Kinetic energy is a scalar quantity, which means it has only magnitude and no direction. It is measured in joules (J) in the SI unit system.

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By Using Euler's method with two steps, we can find the approximate value of Y(2) is 2.125. , where Y is the solution of the initial value problem dy/dx = x - y, and Y(1) = 3.

Euler's method is defined as a numerical technique which is  used to approximate solutions into ordinary differential equations. The method includes dividing the interval of interest into smaller steps and thereafter approximating the solution at each step by using the derivative of the function.

In this case, we are given the initial value problem dy/dx = x - y, with the initial condition Y(1) = 3. To approximate Y(2) using Euler's method with two steps, we will divide the interval [1, 2] into two equal steps.

Step 1:

We start with the initial condition Y(1) = 3. Using the differential equation dy/dx = x - y, we can approximate the value of Y at the midpoint of the interval [1, 2].

Using the step size h = (2 - 1) / 2 = 0.5, we can calculate Y(1.5) as follows:

Y(1.5) ≈ Y(1) + h × (x - y) = 3 + 0.5 × (1.5 - 3) = 3 + 0.5 × (-1.5) = 2.25

Step 2:

Now, using the value of Y(1.5) as the new approximation, we calculate Y(2) using the same process:

Y(2) ≈ Y(1.5) + h × (x - y) = 2.25 + 0.5 × (2 - 2.25) = 2.25 + 0.5 × (-0.25) = 2.125

Thus,  by using Euler's method with two steps, the approximate value of Y(2) is 2.125.

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The complete question is

Use Euler's Method With Two Steps To Approximate Y(2), Where Y Is The Solution Of The Initial Value Problem: Dy : X − Y, Y(1) = 3

In a simple electrical circuit, if it contains a battery, a light bulb, and a properly connected ammeter, the ammeter has a very low internal resistance because it is connected in series with the circuit.

An electrical circuit is made up of a combination of resistors, voltage sources, and current sources that are interconnected in a closed loop. It is used to generate an electric current in a complete circuit and can be as straightforward as a battery connected to a bulb or as complicated as a full-scale electronic circuit.

Ammeters are measuring devices that are used to measure current in a circuit. The ammeter should be connected in series with the circuit to allow current to flow through it. An ammeter with a very low internal resistance should be used since any extra resistance in the ammeter can change the current being measured.

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Answer:

105N

Explanation:

force = mass x acceleration

force without the 25N = 40 x 2

= 80N

On top of this, he has to counteract the 25N so the actual force is 80N + 25N which is 105N

Using lens equation:

Answer:

1.21 cm

No, prolonged exposure to highly intense cannot infrared light cause electrons to be ejected from a clean metal surface because Infrared light doesn't have enough energy. Option A is correct.

According to Einstein's photoelectric effect, prolonged exposure to highly intense infrared light cannot cause electrons to be ejected from a clean metal surface. The electrons do not eject until the threshold frequency is reached, even after prolonged exposure; once the threshold frequency is reached, ejections take place immediately and support a one to one relationship between the electrons and other particle.

The photoelectric effect is based on the hypothesis that the energy radiated from a heated object, such as a stove element or a light bulb filament, is emitted in discrete units, or quanta. The minimum energy required to eject an electron is determined by the threshold frequency. Infrared radiation is of lower frequency and cannot provide sufficient energy to overcome the threshold frequency.

Therefore, even if infrared radiation is exposed for a longer duration, electrons will not be ejected out of a clean metal surface. Thus, prolonged exposure to highly intense infrared light cannot cause electrons to be ejected from a clean metal surface.

Hence, Option A is correct.

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Answer:

flujo de energia

Explanation:

b. Momentum is conserved.

c. Objects always stick together after an inelastic collision.

d. One object may be stationary before an inelastic collision.

In an inelastic collision, there are certain conditions that apply to the collision itself and the behavior of the objects involved. Let's examine each option in detail:

a. Energy is conserved: In an inelastic collision, energy is not conserved. Some energy is typically lost in the form of heat, sound, or deformation of the objects involved. This loss of energy is due to the internal forces and interactions within the objects during the collision.

b. Momentum is conserved: Conservation of momentum is a key characteristic of an inelastic collision. In an inelastic collision, the total momentum of the system before the collision is equal to the total momentum after the collision. This means that the sum of the individual momenta of the objects involved remains constant.

c. Kinetic energy is conserved: Kinetic energy is not conserved in an inelastic collision. As mentioned earlier, some of the initial kinetic energy is transformed into other forms of energy, such as heat or deformation. The total kinetic energy after the collision is generally less than the total kinetic energy before the collision.

d. Objects always stick together after an inelastic collision: In an inelastic collision, the objects involved may stick together or deform upon impact. However, it is not a universal rule that objects always stick together after an inelastic collision. The degree of stickiness or deformation depends on the specific properties of the objects and the nature of the collision.

Therefore, the correct conditions for an inelastic collision in a closed system are:

- Momentum is conserved.

- Objects may stick together or deform after the collision.

- One object may be stationary before the collision.

It's important to note that these conditions may vary depending on the specific scenario and the nature of the objects involved in the collision.

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Answer:

Energy is conserved.

Momentum is conserved

One object may be stationary before an inelastic collision.

Explanation:

Answer:

The ball takes \($t=1 \cdot 917sec$\) to hit the ground.

Explanation:

• The second equation of motion represents the total distances travelled by an object in a time interval of \($\Delta t$\) with an initial speed of \($u$\) and acceleration \($a$\).

• To find the time, ball takes to hit the ground, use the formula: \($$s = ut + \frac{1}{2}a{t^2}$$\)

Where, \($t$\) is time, \($u$\) is initial velocity, \($a$\) is acceleration and\($s$\) is displacement.

• In this case, \($a = g = 9 \cdot 8m/se{c^2}$\).

• Placing the value of the given initial velocity, \($u=0cm/s$\) and displacement,\($s = 13m$\) in the above formula.

\(& \therefore s = ut + \frac{1}{2}g{t^2} \\& \Rightarrow 13 = 0 \cdot t + \frac{1}{2} \times 9 \cdot 8 \times {t^2} \\\)

\(& \Rightarrow 13 = 4 \cdot 9{t^2} \\& \Rightarrow {t^2} = \frac{{13}}{{4.9}} \\& \Rightarrow t = 1 \cdot 917sec \\\end{align}\]\)

• Hence, ball takes \($t=1 \cdot 917sec$\) to hit the ground.

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Answer:

1) The Mechanical Advantage of the lever is 3

2) The velocity ratio of the lever is 4

3) The efficiency of the lever is 75%

Explanation:

A lever is a simple machine that is used to lift a heavy load with a little effort or force

The mechanical advantage is the ratio of the force output to the force input

The given parameters of the lever are;

The length of the lever = 1 m

The weight of the load (force output), \(F_r\) = 600 N

The effort applied (force input), \(F_e\) = 200 N

1) The Mechanical Advantage, MA of the lever is given as follows;

\(MA = \dfrac{F_r}{F_e} = \dfrac{600 \ N}{200 \ N} = 3\)

The Mechanical Advantage, MA of the lever = 3

2) The velocity ratio, V.R., is the ratio of the distance moved by the effort, \(L_e\), to the distance moved by the load, \(L_r\)

For the lever, we have;

The distance of the load from the fulcrum, \(L_r\) = 20 cm = 0.2 m

Therefore, we have;

The distance of the effort from the fulcrum, \(L_e\) = 1 m - 0.2 m = 0.8 m

From which we have;

\(V.R.= \dfrac{L_e}{L_r} = \dfrac{0.8 \ m}{0.2 \ m} = 4\)

The velocity ratio of the lever = 4

3) The efficiency, η, is given as follow;

\(\%Efficiency, \, \eta = \dfrac{M.A.}{V.R.} \times 100 = \dfrac{3}{4} \times 100 = 75\%\)

The efficiency of the lever is 0.75 or 75%.

Explanation:

The length of the lever = 1 m

The weight of the load (force output), F_rF

r

= 600 N

The effort applied (force input), F_eF

e

= 200 N

1) The Mechanical Advantage, MA of the lever is given as follows;

MA = \dfrac{F_r}{F_e} = \dfrac{600 \ N}{200 \ N} = 3MA=

F

e

F

r

The length of the lever = 1 m

The weight of the load (force output), F_rF

r

= 600 N

The effort applied (force input), F_eF

e

= 200 N

1) The Mechanical Advantage, MA of the lever is given as follows;

MA = \dfrac{F_r}{F_e} = \dfra

=

200 N

600 N

=3

The Mechanical Advantage, MA of the lever = 3

2) The velocity ratio, V.R., is the ratio of the distance moved by the effort, L_eL

e

, to the distance moved by the load, L_rL

r

For the lever, we have;

The distance of the load from the fulcrum, L_rL

r

= 20 cm = 0.2 m

Therefore, we have;

The distance of the effort from the fulcrum, L_eL

e

= 1 m - 0.2 m = 0.8 m

From which we have;

V.R.= \dfrac{L_e}{L_r} = \dfra

The distance of the load from the fulcrum, L_rL

r

= 20 cm = 0.2 m

Therefore, we have;

The distance of the effort from t

V.R.= \dfrac{L_e}{L_r} = \dfrac{0.8

L

e

=

0.2 m

0.8 m

=4

The velocity ratio of the lever = 4

3) The efficiency, η, is given as follow;

\%Efficiency, \, \eta = \dfrac{M.A.}{V.R.} \times 100 = \dfrac{3}{4} \times 100 = 75\%%Efficiency,η=

V.R.

M.A.

×100=

4

3

×100=75%

The efficiency of the lever is 0.75 or 75