In your lab group you combined salt and water. Then you compared what happens when an egg is placed in tap water versus salt water. You observed that the egg floated in the salt water, but sank on the fresh water. You and your lab partner discuss the cause of this difference and wonder if the combining of the salt and water caused a physical or chemical change. Choose ALL of the evidence that supports that a physical change has occurred.

A) gas was produced

B) the density changed

C) the salt dissolved in the water

D) the salt and the water cannot be separated into their individual molecules

E) the salt and the water can still be separated into their individual molecules

A boulder at rest on a cliff would have the least amount of kinetic energy, as it is not in motion. The correct option is B.

Kinetic energy is the energy that an object possesses due to its motion. It is the energy that is required to accelerate a stationary object to its current speed. The kinetic energy of an object is dependent on its mass and velocity, with the formula for kinetic energy given by KE = 1/2mv^2, where KE is the kinetic energy, m is the mass of the object, and v is its velocity.

Option A, an airplane flying from New York to Los Angeles, would have a significant amount of kinetic energy due to its high velocity and mass.

Option C, a snail crawling along a sidewalk, would have a small amount of kinetic energy due to its slow speed and small mass.

Option D, a honeybee flying back to its hive, would have a moderate amount of kinetic energy due to its relatively high speed and small mass.

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Yes, Ballistic stretching can be harmful if it is not performed properly.

This type of stretching involves bouncing movements, which can place excessive strain on the muscles and connective tissues. This can lead to muscle strains or tears, as well as other injuries. It is important to use caution when performing ballistic stretches and to stop if any pain or discomfort is experienced. It is also recommended to warm up before stretching and to stretch slowly and smoothly, rather than using ballistic movements.

Ballistic stretching can also increase the risk of muscle imbalances and poor posture if it is not balanced with other types of stretching, such as static stretching. It is generally more effective and safer to gradually increase flexibility through regular, consistent stretching rather than trying to force the body to stretch too quickly or aggressively.

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Answer:

A. Speed

Explanation:

Speed is the magnitude of velocity, which is given in the question. Velocity is a vector quantity and therefore has both a magnitude and a direction. Only the former is implied in the question.

The loudness of a sound is related to the logarithm of the ratio of the measured intensity, 1, to a reference intensity, I. The loudness, L, of a sound, is measured in decibels, dB, and can be determined using the formula L=10log10 (I0I).

Given, The intensity of the sound of a rocket launching = 4500 times that of a jet engine. The loudness of the rocket launching, L = 170 dBNow, we can determine the value of L0 as follows:L = 10 log10 (I0/I)170 = 10 log10 (I0/I) (Equation 1)Therefore, I0/I = antilog (17) (from Equation 1)I0/I = 50,119.41Since the loudness of the rocket launching, L = 170 dB is already given, we can calculate the loudness of the jet engine as follows:L = 10 log10 (I0/I)dB = 10 log10 (I0/I)dB = 10 log10 (50,119.41)dB = 10 (4.700)dB = 47

The intensity of a rocket launching sound is 4500 times that of a jet engine sound, and its loudness is already provided as 170 dB. The loudness of a sound is related to the logarithm of the ratio of the measured intensity to a reference intensity, I.

To calculate the loudness of a jet engine, we can use the formula L = 10 log10 (I0/I).To determine I0/I, we substitute the loudness of the rocket launching, 170 dB, into the formula. We find that I0/I is equal to 50,119.41. We then substitute this value into the formula for the loudness of the jet engine. We find that the loudness of the jet engine is 47 dB. To the nearest decibel, the loudness of the jet engine is 47 dB.

Therefore, the loudness of the jet engine is 47 dB. 150 words to calculate the loudness of a jet engine, we must first determine the intensity of the sound it produces.

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The SI unit of voltage (aka "electric potential difference") is equivalent to:

Joule / Coulomb

This unit is also known as a Volt (V).

The SI unit of voltage, also known as electric potential difference, is equivalent to the Joule per Coulomb (J/C). Therefore, the correct option is D) Joule / Coulomb.

Voltage is defined as the amount of electric potential energy per unit charge. The unit of energy in the International System of Units (SI) is the Joule (J), and the unit of charge is the Coulomb (C). Therefore, the unit of voltage is the Joule per Coulomb (J/C), which represents the amount of energy transferred per unit charge when an electric potential difference is present.

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SWOT Analysis Strengths- Paley’s Products has a low overhead cost with the company operating at a high level of efficiency, resulting in competitive pricing.- They have a team of experienced employees who have worked in the industry for several years.- They have a variety of products in the portfolio that can satisfy customers from different sectors.- They are reputable and have a loyal customer base.Weaknesses- They have been slow to adopt new technology, and this may be a disadvantage to the company.- Limited marketing and sales promotion are affecting their sales revenue.-

They depend on a few key customers for the bulk of their sales revenue, leaving them vulnerable to market changes.Opportunities- Expansion of the product line to include unique products.- The establishment of strategic partnerships with other businesses in the industry.- Exploration of new markets, such as international markets.- Improvement of marketing techniques to increase brand awareness.Threats- Changes in consumer preferences towards environmentally friendly products.- Increase in competition from other businesses in the industry.- Fluctuating market prices for raw materials that may lead to price increases.

Strategic Actions to be taken by Paley Products1. Development of an E-commerce platform to allow online transactions with customers. The E-commerce platform will enable Paley to reach a wider customer base, expand its reach, and increase sales revenue.2. Investment in the research and development of new environmentally friendly products. Paley will remain competitive and cater to the needs of consumers who prefer green products.3. Establishment of strategic partnerships with other businesses in the industry to leverage the strength of other companies in the industry and to develop new products or increase market share.4. Improvement of marketing techniques to increase brand awareness and improve visibility. A marketing strategy that incorporates social media and other digital channels can help promote the brand to potential customers.5. Expansion into international markets. This will enable Paley to diversify its customer base and generate more revenue. Paley can start by targeting nearby countries, then expand globally as they gain more experience and financial stability.

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Answer:

A change of direction that light undergoes when it enters a medium with a different density from the one through which it has been traveling.

Answer:

the fact or phenomenon of light radio waves etc being deflected in passing obliquely through the interface between one ,medium and another or through a medium of varying density

Explanation:

Answer:

(a) RC time constant of the circuit is 6.9 × 10⁻⁶ ms

(b) The potential drop across the capacitor 1.00 s after the switch is closed is 0 V

Explanation:

The given parameters are

The length of the graphite pencil, L = 5.00 cm

The diameter of the graphite, D = 0.05 mm

The resistivity of the graphite, ρ = 1.38 × 10⁻⁵ Ω/m

The capacitance of the capacitor, C = 10.0 mF

The voltage of the power source, V = 0.50-V

(a) The RC time constant of the circuit, τ, is given as follows;

τ = R × C

Where;

R = The resistance of the graphite = L × ρ

C = The capacitance of the capacitor

∴ R = 5.00 cm × 1.38 × 10⁻⁵ Ω/m = 6.9 × 10⁻⁷ Ω

RC time constant of the circuit, τ = 6.9 × 10⁻⁷ Ω × 10.0 mF = 6.9 × 10⁻⁶ ms

RC time constant of the circuit, τ = 6.9 × 10⁻⁶ ms

(b) The potential drop after t = 1.00 s is given as follows;

\(i = \dfrac{V}{R} \cdot e^{-\dfrac{t}{R\cdot C} }\)

Where;

I = The current in the circuit

V = The voltage in the circuit = 0.50 V

R = resistance in the circuit = 6.9 × 10⁻⁷ Ω

C = The series capacitance = 10.0 mF

t = The time taken = 1.00 s

Plugging in the variable values, gives;

\(I = \dfrac{0.5}{6.9 \times 10^{-7}} \cdot e^{-\dfrac{1.00}{6.9 \times 10^{-7}\times 10.0 \ mF} } = 0\)

V(1) = I·R = 0 × R = 0

The potential drop across the capacitor 1.00 s after the switch is closed, V(1)  = 0 V

Answer: if every arrow=1m do 1 times 1 times 1 times 1

Explanation:

(p.s. it equals 1 meter in area 4 meters in perimeter)

Answer:

Explanation:

This is a simple gravitational force problem using the equation:

\(F_g=\frac{Gm_1m_2}{r^2}\) where F is the gravitational force, G is the universal gravitational constant, the m's are the masses of the2 objects, and r is the distance between the centers of the masses. I am going to state G to 3 sig fig's so that is the number of sig fig's we will have in our answer. If we are solving for the gravitational force, we can fill in everything else where it goes. Keep in mind that I am NOT rounding until the very end, even when I show some simplification before the final answer.

Filling in:

\(F_g=\frac{(6.67*19^{-11})(7.2000*10^{26})(5.0000*10^{23})}{(6.10*10^{11})^2}\) I'm going to do the math on the top and then on the bottom and divide at the end.

\(F_g=\frac{2.4012*10^{40}}{3.721*10^{23}}\) and now when I divide I will express my answer to the correct number of sig dig's:

\(Fg=\) 6.45 × 10¹⁶ N

Answer:

accelerating

Explanation:

untill an unbalanced force acting on a body, object at rest remain stationery while object on motion continue moving in constant velocity.

no resultant force means no acceleration.

Answer:

True

Explanation:

1. Lo lose  4.04 × 10⁻⁵ % of its mass; 2. Lo takes 8.97 billion to run out of this gas

Mass of Io, m = 8.93 × 10²² kg.

1. The mass of sulfur dioxide Io loses to Jupiter's magnetosphere per second, dm/dt = 1000 kg

, t = 3.6 billion years= 3.6 × 10⁹ years, Change in mass of Io, Δm = (dm/dt) × tΔm = 1000 × 3.6 × 10⁹

Δm = 3.6 × 10¹² kg

Δm/m = (3.6 × 10¹² kg) / (8.93 × 10²² kg)Δm/m = 0.000000404≈ 4.04 × 10⁻⁷

This can be converted into a percentage by multiplying by 100:% = 4.04 × 10⁻⁷ × 100% = 4.04 × 10⁻⁵ %

Thus, Io would lose approximately 4.04 × 10⁻⁵ % of its mass in 3.6 billion years.

2. Suppose sulfur dioxide makes up 1% of the mass of Io, that is, mSO2 = 1% of 8.93 × 10²² kg = 8.93 × 10²⁰ kg

We know that Io loses 1000 kg of sulfur dioxide per second, so in a year it would lose,

1000 kg/s × 60 s/min × 60 min/hr × 24 hr/day × 365.25 days/year = 31.536 × 10⁹ kg/year= 31.536 billion kg/year

Now, mSO2 = dm/dt × t t = mSO2/(dm/dt)t = (8.93 × 10²⁰ kg) / (31.536 × 10⁹ kg/year)≈ 283 billion seconds

Now, let's convert the seconds into billions of years.t = 283 × (1 second / 31,536,000,000 seconds) t ≈ 8.97 billion years.

Thus, Io would run out of sulfur dioxide in approximately 8.97 billion years.

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The velocity of the horse is 20 meters/second.

To find the velocity of the horse, we can use the formula:

velocity = distance / time

In this case, the distance is 1900 meters and the time is 95 seconds. Plugging in these values into the formula, we get:

velocity = 1900 meters / 95 seconds

Simplifying, we find that the velocity of the horse is:

velocity = 20 meters/second

Speed is the speed and the bearing of movement of an item. Speed is a basic idea in kinematics, the part of traditional mechanics that depicts the movement of bodies. Velocity. As a shift in course happens while the dashing vehicles turn on the bended track, their speed isn't steady.

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Answer:

Mark me as brainliest as i need it ..

I will answer your questions

The claim can be Cosmetics, hygiene, and cleaning product emissions may be dangerous.

Evidence 1: Effect of Air Quality

Volatile organic compounds (VOCs), including formaldehyde, benzene, and toluene, can be found in a variety of cosmetic, hygiene, and cleaning goods. These VOCs have the potential to evaportate and cause indoor air pollution.

Environmental impact is evidence number two

Cosmetics, hygiene, and cleaning goods can have a detrimental environmental impact during manufacturing, usage, and disposal. Microplastics and certain chemicals are among the substances present in these items that may find their way into rivers and endanger aquatic life.

Evidence 3: Worker health effects

Occupational health risks can be present for workers who manufacture and produce hygiene, cleaning, and cosmetic items.

Reasoning: It is clear from the research that emissions from cosmetic, hygiene, and cleaning goods have the potential to be harmful.

Thus, this way, harmful are the emissions from cosmetics, hygiene, and cleaning products.

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Explanation:

.........................

Answer:

80 mph

Explanation:

can you plzzzzz make me brainliest

Answer:

178.955mph or 179mph

Explanation:

✨calculator✨

Answer:

Newton's Second Law tells us that the more mass an object has, the more force is needed to move it. A larger rocket will need stronger forces (eg. more fuel) to make it accelerate. The space shuttles required seven pounds of fuel for every pound of payload they carry.

Explanation:

The equivalent resistance between points A and B in the diagram is 22 Ω

We shall begin by obtaining the equivalent resistance in parallel (i,e the three 6 Ω resistor). Details below:

1/Rₜ = 1/R₁ + 1/R₂ + 1/R₃

1/Rₜ = 1/6 + 1/6 + 1/6

1/Rₜ = 3/6

1/Rₜ = 1/2

Rₜ = 2 Ω

Finally, we shall determine the equivalent resistance between A and B (i.e series arrangement). Details below:

R = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ + R₇ + R₈ + R₉ + R₁₀ + R₁₁

R = 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2

R = 22Ω

Thus, we can conclude that the equivalent resistance is 22 Ω

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We will have the following:

First, we transform the revolutions per second to radians, that is:

Now, we will have that the final angular velocit will be given by:

So, the angular speed after coupling is -12pi/s. [That is the total angular speed will be counterclock wise]

Explanation:

The acceleration g varies by about 1/2 of 1 percent with position on Earth's surface, from about 9.78 metres per second per second at the Equator to approximately 9.83 metres per second per second at the poles.

a. The speed of the pendulum when it reaches the bottom is 0.9 m/s.

b. The height reached by the pendulum is 0.038 m.

c. When the pendulum no longer swing at all, all the kinetic energy of the pendulum has been used to overcome frictional force.

K.E = 100%P.E - 18%P.E

where;

K.E(bottom) = 0.82P.E

K.E(bottom) = 0.82(mgh)

K.E(bottom) = 0.82(1 x 9.8 x 0.05) = 0.402 J

K.E = ¹/₂mv²

2K.E = mv²

v² = (2K.E)/m

v² = (2 x 0.402)/1

v² = 0.804

v = √0.804

v = 0.9 m/s

P.E = 100%K.E - 7%K.E

P.E = 93%K.E

P.E = 0.93(0.402 J)

P.E = 0.374 J

P.E = mgh

h = P.E/mg

h = (0.374)/(1 x 9.8)

h = 0.038 m

When the pendulum no longer swing at all, all the kinetic energy of the pendulum has been used to overcome frictional force.

Thus, the speed of the pendulum when it reaches the bottom is 0.9 m/s.

The height reached by the pendulum is 0.038 m.

When the pendulum no longer swing at all, all the kinetic energy of the pendulum has been used to overcome frictional force.

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The forces acting on the book are: hand on book and earth on book. The forces acting on your hand are: book on hand and earth on hand. the forces "hand on book" and "book on hand" are action-reaction pair.

You hold your physics textbook in your hand. By applying the Newton's third law of action and reaction, we can conclude that:

a) The forces acting on the book are:

   The floor is not in contact with the book, hence, there is no force from the floor on the book

b) The direction of forces in part (a):

c) The forces acting on your hand:

d) The direction of forces in part (c)

e) The action force has the same magnitude as the reaction force, but in opposite direction.

The action-reaction forces are:

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Answer:

mass= 3.5 kg

distance covered= 0.4m

inital speed = 1.5 m/sec

final speed = 0 m/sec

net force

formula for force :

\( \fbox{f = m.a}\)

In order to find the force we need to find the acceleration.

According to third equation of Kinematics-

\( \bold{ {v}^{2} = {u}^{2} + 2as}\)

where,

v= final velocity

u=inital Velocity

a=Acceleration

s=Distance covered

put the value in the above equation

0= (1.5)²+ 2a x 0.4

-2.25= 0.8a

a = -2.25/0.8

a= - 2.8125 m/sec²

now put the value 0f accleration in formula of force

F = 3.5 x - 2.8125

F= -9.84375 N

Answer:

Camaflouge

Explanation:

When animals blend in with their surroundings to hide from predators.

Ex: A squirrel climbing a tree that is the same color of its fur.

An artic fox lying in the snow.

A bee getting pollen.

Stick bugs blending in with shrubs and trees.

Because there is less air over head as you rise in elevation, the pressure drops. Air molecules stretch out more widely and the temperature drops as the pressure drops.

In addition to water, dioxide, ozone, plus numerous other trace compounds—some produced naturally, others as a result of human activity—the most prevalent molecules in the air are nitrogen and oxygen. The atmosphere also contains other components including smoke, dust, acids droplets, and pollen in addition to gases.

If we assume that there are roughly four nitrogen molecules for every oxygen molecule in air, then the mass of a mole of air is equal to 28.8 grams. Any material has a molecular weight of approximately 6 1023. In the Earth's atmosphere, there are therefore roughly 1.04 1044 molecules.

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Answer:

Explanation:

Capacity: the max amount that something can contain.

"the capacity of the freezer is 1.1 cubic feet"

capacitor: device for storing electrical energy, includes two conductor that are close to one another and insulated from each other. A simple example is a parallel-plate capacitor.

Source: Britannica.com

Answer:

Explanation: