what is the maximum mass that can hang without sinking from a 70- cm c m diameter styrofoam sphere in water? assume the volume of the mass is negligible compared to that of the sphere. express your answer to two significant figures a

Answer: The Earth exerts a gravitational force on the Moon which acts as a centripetal force, directed toward the center of the Earth which creates a centripetal acceleration, of which is also directed toward the center of the Earth causing the velocity of the Moon to constantly change direction in a circular orbit.

Explanation:



The force that causes objects to follow a circular path is called the centripetal force and acts towards the center of the circle. Gravitational force on the other hand is the force that objects exerts on each other. As shown on the attached picture when an object moves in a uniform circular motion, its velocity is always in the direction of the tangent of the orbit. This accounts for the constant change in velocity of the object as it is moving around the circle. Furthermore the acceleration of the object which is the moon in this case is directed towards the center of the circle which accounts for the changing direction of the velocity of the moon. Simply the Earth's gravity pulls the Moon in an orbit with circular motion.

Answer:

Because water is wet

Explanation:

Water is wet

The quantization of energy levels and the restrictions on electron transitions in quantum mechanics ensure the stability of atoms. Electrons occupy specific energy levels and are confined to certain orbits around the nucleus, maintaining a balance between the attractive force of the nucleus and the centrifugal force of their motion.

In classical mechanics, atoms are described as miniature solar systems with electrons orbiting around the nucleus.

According to classical electromagnetic theory, an accelerated charged particle emits electromagnetic radiation.

Therefore, in the classical view, orbiting electrons would continuously lose energy and eventually spiral into the nucleus, causing atoms to collapse.

Quantum mechanics, on the other hand, provides a different perspective on the stability of atoms.

It introduces the concept of wave-particle duality, where particles like electrons can exhibit both particle-like and wave-like behavior.

In quantum mechanics, electrons are described by wave functions, which represent the probability distribution of finding the electron in different regions around the nucleus.

The key idea in quantum mechanics is that electrons can only occupy specific energy levels, or quantized states, within the atom. These energy levels are distinct and separated by energy gaps.

Electrons can transition between these energy levels by absorbing or emitting discrete amounts of energy, corresponding to the emission or absorption of photons.

The stability of atoms in quantum mechanics arises from the concept of the ground state.

The ground state is the lowest energy level that an electron can occupy, and it represents the most stable configuration for the atom. In this state, the electron does not emit any radiation and does not spiral into the nucleus.

The quantization of energy levels and the restrictions on electron transitions in quantum mechanics ensure the stability of atoms.

Electrons occupy specific energy levels and are confined to certain orbits around the nucleus, maintaining a balance between the attractive force of the nucleus and the centrifugal force of their motion.

Overall, quantum mechanics resolves the classical problem of instability in atoms by introducing the concept of quantized energy levels, which govern the behavior of electrons and prevent their collapse into the nucleus.

This understanding of atomic stability forms the basis for our modern understanding of the structure of matter and the functioning of atoms in chemical reactions.

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Answer:

Testing

Explanation:

This is basically asking you what the next step of the scientific method is. First, you would ask a question. Next, you would research that question to get some background information. Once you have that information, you would create a hypothesis (typically "If..., then..., because..." format). Then you would conduct an experiment to test your hypothesis. Then you would gather data, draw conclusions, and see if your hypothesis was correct.

Hope this helps!

The amplitude of the function y = -1/2 * sin(2x - pi) is 1/2, the period is pi, and the phase shift is pi/2 to the right.

To find the amplitude, period, and phase shift of the given function y = -1/2 * sin(2x - pi), we can analyze it using the general sine function form y = A * sin(Bx - C). In this case, A = -1/2, B = 2, and C = pi.
1. Amplitude: The amplitude is the absolute value of A, which is |-1/2| = 1/2.
2. Period: The period of the sine function is found by dividing 2pi by the absolute value of B. So, the period is (2pi) / |2| = pi.
3. Phase shift: The phase shift is the horizontal shift of the function and is determined by C / B. In this case, the phase shift is pi / 2 to the right since it is positive.

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Answer:

\(\sf Proof \ below\)

Explanation:

We know that acceleration is change in velocity over time.

\(\sf a=\frac{\triangle v}{t}\)

\(\sf a=\frac{v-u}{t}\)

v is the final velocity and u is the initial velocity.

Solve for v.

Multiply both sides by t.

\(\sf at=v-u\)

Add u to both sides.

\(\sf at + u=v\)

Answer:

Acceleration = v-u/t  when we flip -u and t to right hand side

then -u changes to plus and denominator t changes to numerator

then then  this equations becomes  v=u+at

Explanation:

Answer: Physical component- state of physiological arousal triggered by autonomic nervous system

Behavioral component- outward expression of emotion, including facial expression and behavior

Cognitive component- appraisal of the situation determine which emotion we are experiencing and why.

Explanation:

hope that helps :)

The three elements of emotions are a subjective experience, a physiological response, and a behavioral or expressive response.

Emotions enable us to express our needs to others, such as when we are depressed and in need of assistance. They can also assist us in taking swift action when necessary.

For instance, panic causes you to jump back onto the curb when you're ready to cross the street, and you see a car approaching swiftly. Three components make up the “feeling” aspect of consciousness: a particular physical arousal, a particular conduct that communicates the feeling to others, and an internal awareness of the emotion.

Therefore, the elements of emotions are subjective experience, physiological response, and behavioral or expressive response.

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Pressure and temperature, a liquid's specific heat conductivity (Cp) is approximately 4.2 J/g°C. According to this, 4.2 watt years of energy  needed to raise 1 water gram's temperature 1 degree Celsius.500 j/kg oc

In other terms, a solid's or liquid's specific heat is the amount of energy needed to increase the temperature of an unit weight of the solid by one degree Celsius. We represent it as C. The heat needed to raise the temperature for 1 kg solid or liquid by 1K is measured in S.I. units.

The specific thermal conductivity of various states of materials varies often with temperature. At 20 °C, liquid water has one of the largest specific heat capacities of any common solid (4184 J kg 1 K), whereas ice's is just 2093 J kg 1 K.

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Answer:

13.6 cm

Explanation:

From Snell's law:

n₁ sin θ₁ = n₂ sin θ₂

In the air, n₁ = 1, and light from the horizon forms a 90° angle with the vertical, so sin θ₁ = sin 90° = 1.

Given n₂ = 4/3:

1 = 4/3 sin θ

sin θ = 3/4

If x is the radius of the circle, then sin θ is:

sin θ = x / √(x² + 12²)

sin θ = x / √(x² + 144)

Substituting:

3/4 = x / √(x² + 144)

9/16 = x² / (x² + 144)

9/16 x² + 81 = x²

81 = 7/16 x²

x ≈ 13.6

Light slows down and somewhat changes direction as it passes through water from air. Refraction is the name for this shift in direction.

Light "bends" more in the direction of the normal line when it enters a denser substance (one with a higher refractive index). Some light is reflected off of water when light that is going through the air collides with it. The remaining light enters the water and travels through it, but it bends (or refracts) as it does so. When light strikes glass or any other transparent substance, the same thing occurs. Air is lighter and thinner than glass and water. It is claimed that they are "denser" than air. Light slows down when it transitions from less dense air into denser glass or water.

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Answer:

1. troposphere

2. troposphere (still)

3. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.

4.The stratosphere is where you'll find the very important ozone layer. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun. In fact, the ozone layer absorbs most of the UV radiation the sun sends to us. Life as we know it wouldn't be possible without this layer of protection.

5. It contains the ozone, which protects Earth from the sun's radiation. Why aren't there many meteors in the troposphere? They burn up before they reach the troposphere.

Explanation:

1.The troposphere is the atmospheric layer closest to the planet and contains the largest percentage (around 80%) of the mass of the total atmosphere. Temperature and water vapor content in the troposphere decrease rapidly with altitude.

2.The layer closest to Earth's surface is the troposphere, reaching from about seven and 15 kilometers (five to 10 miles) from the surface. The troposphere is thickest at the equator, and much thinner at the North and South Poles.

3. Explained in the answer.

4. Explained in the answer.

5. Explained in the answer.

A man whose mass is 40kg walk up a flight of 20 step each 150mm height in 10 sec. The average power developed is 12.0 W.

The average power developed by the man as he walks up the stairs, you need to know the work he does and the time it takes him to do it. First, you can find the work done by the man by multiplying his weight (which is equal to his mass multiplied by the acceleration due to gravity) by the distance he travels:

= Work = (40 kg) x (10 m/s^2) x (20 steps x 0.150 m/step)

= 120 J

Then, you can divide the work done by the time it takes to do it to find the average power developed:

= Power = Work / Time

= 120 J / 10 s

= 12.0 W

So, the average power developed by the man as he walks up the stairs is 12.0 W.

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Answer:

the answer up top is correct

Answer:

Release

Explanation:

The water is heated until

The people in the music industry still prefer analog music storage. Because analog devices record the music in its original form.

There are advantages to both digital and analog music. Even today, music connoisseurs debate the subject incessantly.

Understanding both recording methods can help you appreciate music more by providing you with a better understanding of playback depth. Analog and digital songs have different effects on playback,

But both can identify the various aspects of a song. In honor of music as a whole, we're diving into both and bringing out the best of each.

Hence people in the music industry still prefer analog music storage. Because analog devices record the music in its original form.

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Answer:

B

Explanation:

5. All the resistors in this circuit, the 18 Ω resistor included, are in parallel. The voltage drop across each resistor is the same, which is the equivalent to the potential difference of the battery. That is, 36 V [choice K].

6. The ammeter is in series with the branch containing a 12 Ω resistor. Since the voltage drop across this resistor is 36 V, the current in this branch will be I = V/R = (36 V)/(12 Ω) = 3.0 A [choice D].

7. The equivalent resistance of the circuit can be calculated as follows:

1/R = 1/12 + 1/9 + 1/18 = 1/4; thus, R = 4.0 Ω [choice G].

8. Electrical power can be defined as electrical work/time, and electrical work can be given by W = qV. If P = qV/t and q/t = I (charge flowing per unit time is equal to current), then P = VI. From Ohm's law, V = IR, and I = V/R. Substituting V/R for I in the power equation, P = V²/R.

For this circuit, the V = 36 V and R (the equivalent resistance) = 4.0 Ω. So, the power loss in the circuit is P = (36 V)²/(4.0 Ω) = 324 W [choice J].

The convert a mass of 1012 micrograms to kilograms, we need to use the metric conversion factor. The metric system uses prefixes to denote different orders of magnitude, and the prefix "micro" denotes a factor of 10^-6. This means that one microgram is equal to one millionth of a gram, or 0.000001 grams.

The convert micrograms to kilograms, we need to move six decimal places to the left, since one kilogram is equal to 1,000 grams. Therefore, we can express 1012 micrograms as 1.012 grams by dividing 1012 by 1 million. Then, we can convert grams to kilograms by dividing 1.012 by 1000, since there are 1000 grams in a kilogram. The final answer is 0.001012 kilograms, which is the mass equivalent of 1012 micrograms. This conversion is important when dealing with small masses in scientific and medical research, where measurements are often expressed in micrograms or even nanograms. Accurate conversion between units of measurement is essential to ensure accurate results and proper interpretation of data.

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Explanation:

If there are more reactants than products, it is a synthesis reaction. If oxygen is a part of the reactant, it is a combustion reaction. If one ion replaces another, it is a single replacement reaction. If there are two compounds in a reactant where cations switch, it is a double replacement reaction.

The question relies on conservation of energy

2 Energy equations:

Kinetic Energy = 1/2mv^2

Gravitational potential energy = mgh

Initial energy = final energy

1/2m(v0)^2 = mgh + 1/2m(vf)^2

Divide mass out to save time

1/2(v0)^2 = gh + 1/2(vf)^2

PLug in what we know:

v0 = 39 m/s

h = 21 meters

1/2(39)^2 = 9.8(21) + 1/2(vf)^2

1/2(39)^2 - 9.8(21) = 1/2(vf)^2

554.7 = 1/2(vf)^2

1109.4 = (vf)^2

vf = 33.3076 m/s

Answer:

When the mass is drawn upwards and let go, the force of gravity accelerates it,

Explanation:

if you send me the video i can give you a better answer its just hard without seeing it

Main answer: The magnetic field between the hot and neutral wires supplying DC power to the light rail commuter train is 0.0053 T.

The magnetic field between two parallel conductors can be calculated using the equation B = (μ0*I)/(2π*r), where B is the magnetic field, μ0 is the permeability of free space, I is the current, and r is the distance between the wires. Plugging in the given values, we get:

B = (4π x 10^-7 T*m/A)*(800 A)/(2π*0.75 m)

B = 0.0053 T

Therefore, the magnetic field between the hot and neutral wires supplying DC power to the light rail commuter train is 0.0053 T.

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Answer:

W = 66 J

Explanation:

Given that,

The weight of the box, W = 44 N

It is placed on a shelf that is 1.5 m above the ground.

We need to find the work done in lifting the box.

We know that,

Work done, W = Fd

So,

W = 44 N × 1.5 m

= 66 J

So, the required work done is equal to 66 J.

Answer:

Product of masses and square of the distance them.

Explanation:

The gravitational force between two objects is given by :

\(F=\dfrac{km_1m_2}{r^2}\)

The two characteristics that determine the strength of the gravitational force between two objects are :

1. The product of masses of two objects

2. The distance between the charges

Answer:

(i) The acceleration of the object down the plane is approximately 4.9 m/s²

(ii) The time it takes for the object to reach the bottom is approximately \(1.\overline{428571}\) seconds

(iii) The time it takes the object to come to rest is approximately 1.030636 seconds

(iv) The object has travelled past the top of the plane by time it comes to rest

Explanation:

(i) The given parameter for the objects motion are;

The angle of inclination of the plane with the horizontal, θ = 30°

The length of the plane, s = 5 m

Let "a" represent the acceleration down an inclined plane, due to the acceleration under gravity "g" we have;

a = g × sin(θ)

Where;

g = The acceleration due to gravity ≈ 9.8 m/s²

∴ a ≈ 9.8 m/s² × sin(30°) = 9.8 m/s² × 0.5 = 4.9 m/s²

The acceleration of the object down the plane, a ≈ 4.9 m/s²

(ii) The time it takes for the object to reach the bottom, can be found from the following kinematic equation of motion;

s = u·t + 1/2·a·t²

Where;

s = The length of the inclined plane = 5 m

u = The initial velocity of the object = 0 m/s

t = The time of motion of the object (Here the time to reach the bottom of the plane)

a = The acceleration of the object = 4.9 m/s²

Therefore, we have;

5 = 0 × t + 1/2 × 4.9 × t² = 2.45·t²

t² = 5/2.45 = 100/49

t = √(100/49) = 10/7 = \(1.\overline{428571}\)

The time to reach the bottom of the plane = t = \(1.\overline{428571}\) seconds

(iii) When the object is thrown up the plane with an initial velocity of 15 m/s, the time, "t", it takes the object to come to rest is found by the following kinematic equation of motion;

v² = u² - 2·a·s

Therefore, we have;

v² = 15² - 2 × 4.9 × 5 = 176

v = √176 = 4·√11

The velocity of the object at the top of the plane = v = 4·√11 m/s

The time it takes the object to come to rest after reaching the top of the plane = The time it takes the object (projectile) to reach maximum height

\(t_m = \dfrac{v_i \cdot sin(\theta _i )}{g}\)

Where;

\(t_m\) = The time it takes the object to reach maximum height

\(v_i\) = The initial velocity of the object at the top of the inclined plane = 4·√11 m/s

\(\theta _i\) = The initial angle of inclination of the path of the object with the horizontal = 30°

Therefore, we have;

\(t_m = \dfrac{4 \times \sqrt{11} \times sin(30^{\circ} )}{9.8} = \dfrac{10 \cdot \sqrt{11} }{49} \approx 0.67686\)

The time it takes the object to come to rest after reaching the top of the plane = The time it takes the object to reach maximum height = \(t_m\) ≈ 0.67686 seconds

The time it takes the object to reach the top of the plane, \(t_{top}\), is given from the kinematic equation of motion, v = u - a·t, as follows

v = u - a·t

∴ t = (u - v)/a

\(t_{top}\) = (15 - 4·√11)/4.9 ≈ 0.353776

The time it takes the object to reach the top of the plane = \(t_{top}\) ≈ 0.353776 s

The total time it takes the object to come to rest, ∑t = \(t_m\) + \(t_{top}\)

∴ ∑t ≈ 0.67686 + 0.353776 = 1.030636

The time it takes the object to come to rest = ∑t ≈ 1.030636 seconds

(iv) The distance up the plane the object reaches, "s", is given by the following kinematic equation;

s = u·t - 1/2·a·t²

Therefore, we have;

s = 15 × 15/4.9 - 1/2 × 4.9 × (15/4.9)² ≈ 22.959 m

However, the plane is 5 meters long, therefore, the object goes further than the top of the plane.

The statement, "The Voyager 1 space probe can't change its own motion" is correct and true. The Voyager 1 space probe was launched by NASA in 1977, and since then it has traveled over 14 billion miles away from Earth. It's the most distant spacecraft from Earth.

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I think its "a dropped penny sinks at the bottom of a pond". Because, non-contact force is a force that you don't touch, like gravity or weight, that falls but you didn't drop it on purpose nature did or gravity itself did.

As the velocity of a stream carrying a mixture of particles decreases, the heaviest particles will most likely be deposited first. This phenomenon is known as sedimentation.

The process of sedimentation separates particles of different sizes and densities from a mixture by allowing them to settle at different rates due to gravity. The heavier particles settle faster than lighter ones. Therefore, they are the first to be deposited.Sedimentation can occur naturally or artificially. For example, in a river, sedimentation can occur naturally due to changes in water flow and velocity. Artificial sedimentation can be used in water treatment plants to remove impurities from water

The heaviest particles will most likely be deposited first as the velocity of a stream carrying a mixture of particles decreases.Explanation: This is due to the process of sedimentation, which separates particles of different sizes and densities from a mixture by allowing them to settle at different rates due to gravity. The heavier particles settle faster than lighter ones, and hence they are the first to be deposited.

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Diffraction is the bending of waves around an obstacle or through an opening. It not only occurs with light waves but also with sound waves.

For instance, when 1500-hz sound waves encounter a door that is 94 cm wide, they can diffract or bend around it to reach the other side.

The amount of diffraction that occurs depends on the size of the obstacle, the wavelength of the wave, and the distance between the source and the obstacle.

In this case, the wavelength of the 1500-hz sound wave is approximately 23 cm, which is smaller than the width of the door. Therefore, some of the sound waves will diffract around the door while others will be absorbed by it.

This effect can be observed in everyday situations, such as hearing someone's voice from the other side of a closed door or hearing music playing in another room.

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A vector has two components: a magnitude and a direction. Magnitude is the length of the vector, and direction is the angle that the vector makes with the x-axis. We can use the Pythagorean theorem to find the magnitude of the vector a.Magnitude of vector a :

\(a = √(a_x² + a_y²)a_x = -5.00 ma_y = 9.00 m\)

Substituting the values in the formula, we get;

\(a = √((-5.00 m)² + (9.00 m)²)a = √(25.00 m² + 81.00 m²)a = √1066 m²a = 32.7 m\) (rounded to one decimal place)

Now, to find the direction of the vector, we can use trigonometry. The direction of the vector a is given by the angle that the vector makes with the positive x-axis. We can find this angle using the tangent function.

\(tan θ = a_y / a_xtan θ = (9.00 m) / (-5.00 m)θ = -60.3°\) (rounded to one decimal place)The angle is negative because it is measured clockwise from the positive x-axis. Therefore, the magnitude of the vector a is 32.7 m, and the direction of the vector is 60.3° clockwise from the positive x-axis.

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