on a sunny morning, students standing in front of a store window noticed an image of themselves in the glass. why did the students see their image in the glass?

The total resistance in the circuit is 120 ohms

According to Ohm's  law E= I*R

where E => Electromotive force that we know as Voltage

I refer to the Current in the circuit

From the given law, we can say that

voltage = current x resistance

so voltage in the circuit is 6v

and the current in the circuit is 0.05A

and resistance is x ohms

so

so the resistance in the circuit is 120 Ohms. The Current in the circuit is directly proportional to the voltage in the circuit at a constant resistance.

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Answer:

Silver is the best conductor of electricity, as the metal has more free electrons to transfer electric energy.

Higher the number of free electrons more efficient the metal to conduct electricity.

Explanation:

Answer:

Explanation:  THE MATERIAL WITH LEAST RESISTANCE WILL BE THE BEST CONDUCTOR OF ELECTRICITY.WE KNOW THAT

R=ROH(l)/A

=l/A is constant

hence lower the value of resistivity best will be the conductor

hence P WILL BE THE BEST CONDUCTOR.

Explanation:

df = do + vot  + 1/2 at ^2      do = what you are looking for      df = ground = 0

0 = do + 6 (3 ) + 1/2 ( -9.81) (3^2)

do = 26.1 m

Answer:

A Pulse Wave is a short, non periodic, wave formed by a single input of energy rather than a continuous or repeated input of energy.

Explanation:

A pulse wave or pulse train is a kind of non-sinusoidal waveform that includes square waves and similarly periodic but asymmetrical waves. It is a term is used in synthesizer programming, and is a typical waveform available on many synthesizers.

Answer:External forces acting on an object may include friction, gravity, normal force, drag, tension, or a human force due to pushing or pulling. When in a non-inertial reference frame (see coordinate system, below), fictitious forces, such as centrifugal pseudoforce are appropriate.

Explanation:

Answer:Most physics and biomechanics studies of a golf swing are concerned with the motion of a ... The top surface of the concrete was much smoother than the ball, ... The ball will then roll like a coin on its edge or like a ball used in lawn bowls. ... centre of the club head then the force of the ball pushing against the face

Explanation:

Answer:

C

Explanation:

Am increase in velocity?

Answer:

change in mass is not acceleration

When a body jumps into the air, in addition to the effects of gravity and air resistance, several other factors influence its trajectory. Three of the most important factors are Initial velocity, angle of projection, and Spin or angular momentum.

Initial velocity: The velocity at which the body jumps into the air has a significant effect on its trajectory. A body that jumps with a higher initial velocity will travel farther and higher than one that jumps with a lower velocity.

The angle of projection: The angle at which the body is projected into the air can greatly affect its trajectory. If the body is projected at a low angle, it will travel farther along the ground, while a higher angle of projection will result in a shorter distance but greater height.

Spin or angular momentum: The spin or angular momentum of the body can affect its trajectory by causing it to deviate from a straight line. A body with no spin will typically follow a straight trajectory, while one with spin will experience a curved or twisting motion in the air. This effect is particularly important in sports such as baseball, tennis, and gymnastics, where the spin of the ball or body can greatly influence its trajectory.

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Solar nebula flattening is a natural consequence of collisions between particles in a spinning cloud. therefore, option B is correct.

When a solar nebula collapses under its own gravity, it begins to spin due to the conservation of angular momentum. As the cloud spins, particles within it collide and interact. These collisions cause the cloud to flatten into a disk shape rather than remaining spherical.

Angular momentum plays a crucial role in this process. The initial slight asymmetry or irregularity in the nebula's shape leads to variations in the speeds and directions of the particles' motions. As particles collide and transfer momentum, their motion tends to align along the rotational axis of the cloud, promoting the formation of a flattened disk structure.

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Answer: you have it correct

Explanation:

Answer:yall dumd dang thought yall know better

Explanation:

hehe

Answer:

5 amps

Explanation:

I = P/V

I = current (amps)

P = power (watts)

V = voltage (volts)

I = 60/12

I = 5

The sum of the entropy changes of the system and its surroundings gives the overall entropy change of a system. In this scenario, we have a 0.31-efficiency engine that draws 36,000 J of heat from a 297°C reservoir.

Initially, we must compute the amount of heat rejected by the engine. Because the engine is only 31% efficient,  we have a 0.31-efficiency engine that draws 36,000 J of heat from a 297°C reservoir. the remaining heat (69%) is rejected to the environment: Q out = (1 minus efficiency) * Q in = (1 minus\(0.31) * 36,000 J = 24,840\) J Hence, using the equation: we can compute the engine's entropy change. \(Q in / T hot - Q out / T\) cold = S engine where T hot is the hot reservoir temperature \((297°C = 570 K)\)and T cold is the cold reservoir temperature (ambient temperature,

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This evidence best supports the argument that larger magnets can attract more objects. Here option A is the correct answer.

This is because the statement suggests that the strength of a magnet is directly proportional to its size. This is in line with the fundamental properties of magnets. The strength of a magnet is determined by the strength of its magnetic field, which is generated by the motion of electrons within the magnet. The larger the magnet, the more electrons it contains, and the stronger its magnetic field.

Options B and C are partially correct, but they are not the best supported by the evidence presented. A magnet can indeed attract magnetic objects through various materials, but this is not the focus of the statement. Similarly, magnetic fields do exist between objects that are not in contact with each other, but this is not directly related to the statement.

Option D, on the other hand, is incorrect. All objects that have electrons have a magnetic field, not just those made of metal. However, the strength of the magnetic field depends on the material's properties and the arrangement of the electrons within the object.

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Answer:

so it would be 60N divide by 30kg which gives you 20m/s²

Explanation:

Acceleration will increase bc acceleration is the change in speed and direction so if you increase the force it is most to to faster

Answer:

kinedk engrerr

Explanation:

To determine the position u of the mass at any time t, we can use the equation of motion for a mass-spring system without damping:n m * u''(t) + k * u(t) = 0

m = 2 lb / (32.2 ft/s^2) = 0.062 lb·s^2/ft

The spring constant k can be determined using Hooke's law:

k = F / x

where F is the force exerted by the mass and x is the displacement. In this case, the force F is the weight of the mass, and the displacement x is 6 in:

k = (2 lb) / (6 in) = (2 lb) / (6 in) * (1 ft/12 in) = 0.111 lb/ft

The equation of motion now becomes:

0.062 * u''(t) + 0.111 * u(t) = 0

To solve this second-order linear homogeneous differential equation, we assume a solution of the form u(t) = A * cos(ωt + φ).

Substituting this assumed solution into the equation of motion, we get:

-0.062 * A * ω^2 * cos(ωt + φ) + 0.111 * A * cos(ωt + φ) = 0

-0.062 * ω^2 + 0.111 = 0

Solving for ω, we get:

ω = sqrt(0.111 / 0.062) = 2.258 rad/s

From ω, we can determine the frequency f and period T:

f = ω / (2π) = 2.258 / (2π) ≈ 0.359 Hz

T = 1 / f ≈ 2.786 s

The amplitude A is determined by the initial conditions. When the mass is pulled down an additional 3 in (0.25 ft) and released, it reaches its maximum displacement, so A = 0.25 ft.

Therefore, the position u of the mass at any time t is given by:

u(t) = 0.25 * cos(2.258t)

To draw the graph of u(t), plot the position u on the y-axis and time t on the x-axis, using the equation u(t) = 0.25 * cos(2.258t). The graph will be a cosine wave with an amplitude of 0.25 ft.

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The Lewis structure for the sulfite ion (SO32-) can be completed as follows:

            O

          ╱  ╲

    O = S = O

          ╲  ╱

            O^-

the central sulfur atom (S) is surrounded by three oxygen atoms (O). The sulfur atom has six valence electrons, and each oxygen atom contributes six valence electrons. Adding up the total valence electrons gives us 6 (sulfur) + 3 * 6 (oxygen) + 2 (negative charge) = 26 valence electrons. Starting with the skeleton structure, we distribute the remaining electrons to fulfill the octet rule for each atom. We can place two lone pairs of electrons on each oxygen atom and two lone pairs on the sulfur atom. After distributing all the electrons, we check if each atom has a complete octet.

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Answer:

Explanation:

actually , the acceleration due to gravity depends on the distance from it's center of the earth.

when the distance from the earth increases , the acceleration due to gravity decreases as a result . The value of gravity in space is zero.

Answer:

The value of the resistance is 3.99 kΩ

Explanation:

The value of the resistance, given that a heart pacemaker fires 89 times a minute, and each time a 36.0-nf capacitor is charged to 0.632 of its full voltage, is 3.99 kΩ.

How to determine the value of the resistance?

We know that a pacemaker fires 89 times per minute, charging a 36.0-nf capacitor each time, and the capacitor is charged to 0.632 of its full voltage.

The formula for determining the time constant is: τ = RC and the formula for determining the voltage of a capacitor as it charges is: Vc = Vmax(1 - e^(-t/τ)) Using the following information, we can compute the value of the time constant:

τ = RCτ = (0.632Vmax * C) / IV max = 9 V The value of the time constant is τ = RC = (0.632Vmax * C) / I = (0.632 * 9 * 10^-3) / I = 5.67 * 10^-3 / I To find the value of the resistance, R, we'll use the frequency of the pacemaker (f = 89/60 Hz), which is the number of times it fires per second.

RC = 1/fRC = (5.67 × 10^-3)/IR = RCfR = [(5.67 × 10^-3)/I](89/60)R = 3.99 kΩ

Therefore, the value of the resistance, given that a heart pacemaker fires 89 times a minute, and each time a 36.0-nf capacitor is charged to 0.632 of its full voltage, is 3.99 kΩ.

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Answer:

4,500 kilometers

Explanation:

New York is very far from Los Angeles therefore the distance will be in the thousands.

Answer:

4,500 Km

Explanation:

Answer: here the answer!

Explanation:

In the world of mechanics, there are four basic types of motion. These four are rotary, oscillating, linear and reciprocating. Each one moves in a slightly different way and each type of achieved using different mechanical means that help us understand linear motion and motion control.

Answer:

i dont know if this is a true or false but this would be true?

Explanation:

...

The half-life of 40K is approximately 1.3 billion years. Given a ratio of 40Ar/40K as 3/1 in a granite sample, we can estimate the age of the sample by understanding the decay process.  Based on the given 40Ar/40K ratio, the age of the sample is approximately 650 million years.

Since the half-life of 40K is 1.3 billion years, this means that after each half-life, half of the 40K atoms will have decayed into 40Ar. Therefore, if the ratio of 40Ar/40K is 3/1, it suggests that three-quarters (or 75%) of the original 40K atoms have decayed into 40Ar.

To determine the age, we can calculate the number of half-lives that have occurred based on the remaining 25% of 40K. Since each half-life is 1.3 billion years, dividing the remaining 25% by 50% (half) gives us 0.5. Thus, the sample has undergone 0.5 half-lives.

Multiplying 0.5 by the half-life of 1.3 billion years gives us an estimated age of 0.65 billion years, or 650 million years, for the granite sample.

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Answer:

The earth's axis of rotation is tilted 66.5 degrees with respect to its orbital plane around the sun and its axis of rotation is inclined 23.5 degrees from the perpendicular, with respect to this plane. The tilt of the earth affects the angle between the sun beam and the normal over a surface.

Earth orbits at an angle, so half the year, the Northern Hemisphere is tilted toward the Sun — this is summer in the Northern Hemisphere, and winter in the Southern Hemisphere. The other half of the year, the Northern Hemisphere is tilted away from the Sun, creating winter in the north and summer in the south.

When the Earth's axis is tilted toward the sun for the Northern Hemisphere, the people in the Northern Hemisphere experience summer, while at the same time, the Southern Hemisphere is tilted away from the sun and the people there experience winter.

The Northern Hemisphere receives the maximum intensity of the sun's rays, while the angle of sunlight decreases in the Southern Hemisphere.

When the sun's rays strike Earth's surface near the equator, the incoming solar radiation is more direct (nearly perpendicular or closer to a 90˚ angle). Therefore, the solar radiation is concentrated over a smaller surface area, causing warmer temperatures.

Answer:

xfxy naa

Explanation:

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The football can achieve a maximum height of 0.7415 m when thrown with a velocity of 7 m/s at an angle of 33 degrees with respect to the horizontal axis.

Let's find the initial velocity of the football on the vertical axis,

the velocity of football in the vertical axis, u = 7 sin(33)

u =7 (0.5446)

u = 3.8124

Now let's find the maximum height that can be achieved by the football.

The maximum velocity of the football will be zero, so the final velocity is zero.

Using equation,

\(v^2-u^2 = 2ah\)

we can find the height where h is the maximum height that can be achieved.

Substituting all the values in the above equation, we get

0 - 14.5343 = - 2(9.8)h

This negative depicts that acceleration is in the opposite direction of the initial velocity.

14.5343 = 19.6 h

h = 0.7415

Hence, the football can achieve a maximum height of 0.7415 m when thrown with a velocity of 7 m/s at an angle of 33 degrees with respect to the horizontal axis.

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