2. A swimmer speeds up from 1.1 m/s to
1.3 m/s during the last 20 s of a workout.
What is the swimmer's acceleration during
this time interval?

The Schwarzschild radius of a black hole depends on the mass and density of the black hole because volume is the space that an object occupies.

Volume is defined as the amount of space occupied by an object. It can be measured in cubic units. If the black hole has more volume then it has more radius and vice versa.

So we can conclude that the Schwarzschild radius of a black hole depends on the mass and density of the black hole because volume is the space that an object occupies.

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The theoretically available power from a mass flow of 1,000 kg/s of water falling a vertical distance of 100 m is 9,800,000 Watts or 9.8 Megawatts.

The power available from a mass flow of water can be calculated using the formula:

Power = (mass flow rate) * g * h

where:

- Power is the available power

- mass flow rate is the rate at which mass flows (in kg/s)

- g is the acceleration due to gravity (approximately 9.8 m/s^2)

- h is the vertical distance the water falls (in meters)

mass flow rate = 1,000 kg/s

vertical distance = 100 m

Using the formula, we can calculate the power:

Power = (1,000 kg/s) * (9.8 m/s^2) * (100 m)

Power = 9,800,000 Watt

Therefore, the theoretically available power from a mass flow of 1,000 kg/s of water falling a vertical distance of 100 m is 9,800,000 Watts or 9.8 Megawatts.

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The generator must turn at a speed of 77.8 radians per second to produce a peak output of 120 V in a 0.550 T magnetic field.

The peak voltage output of a generator can be calculated using the formula:

\(Vpeak = NBAw\)

where:

Vpeak is the peak voltage output.

N is the number of turns in the coil

B is the magnetic field strength

A is the area of the coil

ω is the angular velocity of the coil

In this case, the coil has 300 turns and is 25.0 cm on a side, so its area is:

\(A = (25.0cm)^{2} = 0.0625 m^{2}\)

The magnetic field strength is 0.550 T, and we want to find the angular velocity ω at which the generator must turn to produce a peak output of 120 V. Rearranging the formula above, we get:

ω = Vpeak / NBA

Substituting the given values, we get:

\(w = (120V) / (300 turns * 0.0625m^{2}* 0.550T) = 77.8 rad/s\)

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Answer:

Independent variable: fructose

Dependent variable: Metabolism (depends on fructose)

Control variable: Amount of fructose. (More fructose, more fat and vice-versa)

The repulsion force between the two Arkon nuclei when the distance between them is 1x10⁻³μm is approximately 7.4x10⁻¹⁴N. The correct option is d. 7.4x10⁻¹⁴N.

The formula for repulsion force between two Arkon nuclei when the distance between them is given by Coulomb's law. Coulomb's law states that the force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Mathematically, the law can be expressed as F=kq1q2/r²,

Where F is the force, q1 and q2 are the charges, r is the distance between the charges, and k is the Coulomb's constant.The electric charge of one electron is 1.6x10⁻¹⁹C.

Therefore, the charge of the Arkon nucleus with 18 protons = 18(1.6x10⁻¹⁹) C = 2.88x10⁻₈⁸ CThe force between the two Arkon nuclei can be calculated using the formula above.

F=kq1q2/r²

Substituting the values we have;F = (9x10⁹)(2.88x10⁻¹⁸ C)2/(1x10⁻³ m)2F ≈ 7.4x10⁻¹⁴ N. Therefore, the repulsion force between the two Arkon nuclei when the distance between them is 1x10-3μm is approximately 7.4x10⁻¹⁴N. The correct option is d. 7.4x10⁻¹⁴N.

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Answer:

D. Energy in an isolated system remains constant.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Furthermore, the various forms of energy are solar energy, electrical energy, chemical energy, thermal energy, wind energy, nuclear energy etc.

The Law of Conservation of Energy states that energy cannot be destroyed but can only be transformed or converted from one form to another.

According to the law of conservation of energy, we can infer or deduce that the total energy of the system must stay the same because it cannot be destroyed, but kinetic energy (KE) can be transformed to potential energy (PE) and potential energy (PE) can be transformed to kinetic energy (KE) within the system.

hydrolysis.

Explanation:

Chemical weathering is what happens when rocks are broken down and chemically altered. Learn about the different types of chemical weathering, including hydrolysis, oxidation, carbonation, acid rain and acids produced by lichens.

Answer:

PE = mgh

Explanation:

m is mass, g is gravitational constant (9.81) and h is height

Answer:

In order to determine the voltmeter reading in this experiment, we need to use Ohm's Law, which states that the current in a circuit is directly proportional to the voltage and inversely proportional to the resistance. The equation is:

V = I * R

Where:

V = voltage (measured in volts)

I = current (measured in amperes)

R = resistance (measured in ohms)

Given that the ammeter reading was 0.75 A and the resistance of resistor R was 160 ohms, we can substitute these values into the equation:

V = 0.75 A * 160 ohms

V = 120 V

Therefore, the voltmeter reading is 120 V.

Answer:

105.6 KJ

Answer

3.7/5

4

hope this will help you friend.

A commutator is used to modify an AC generator to DC generator,  which reverses the connections between the coil and the external circuit to produce a direct current output.

An A.C generator, also known as an alternator, is a device that converts mechanical energy into alternating current electrical energy. It consists of a rotating magnetic field and stationary armature coils to induce the current. The output voltage alternates in polarity, producing a sinusoidal waveform.

To modify an A.C generator into a D.C generator, a commutator is used. The commutator is a rotating switch that consists of copper segments insulated from each other. It is attached to the armature coil, which is connected to the external circuit through brushes.

The commutator's function is to change the alternating current produced by the armature coil into direct current. It does this by reversing the connections between the coil and the external circuit at the same frequency as the voltage polarity reverses. This results in the output voltage always maintaining the same polarity, producing a direct current.

In summary, an A.C generator is modified into a D.C generator by adding a commutator, which reverses the connections between the coil and the external circuit to produce a direct current output.

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The statement that must be true of an extended body experiencing a net force of zero is that the center of mass of the extended body is not accelerating.

When an extended body experiences a net force of zero, it means that the vector sum of all the forces acting on the body is zero. According to Newton's second law of motion, F = ma, where F is the net force, m is the mass, and a is the acceleration. Since the net force is zero, the acceleration of the body is also zero. In an extended body, different parts of the body may experience different forces, causing them to accelerate or decelerate. However, the center of mass of the body represents the point where the body's total mass is concentrated. If the net force is zero, the center of mass remains at rest or moves with a constant velocity, indicating that it is not accelerating.

Therefore, the correct statement is that the center of mass of the extended body is not accelerating.

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Answer:

131.2440 N

Explanation:

The net force is calculated by finding the resultant between Fb and Fa. This is done by taking the square root of Fb squared plus Fa squared.

\(Fnet=\sqrt{Fb^{2} +Fa^{2} } =\sqrt{85N^{2} +100N^{2} } =\sqrt{7225+10000}=\sqrt{ 17225}\)

\(Fnet=131.2440 N\)

To create a standing wave with n=7 in a pipe of 0.50m length and filled with air, we need to use the formula v = nλf, where v is the speed of sound in air, n is the number of nodes, λ is the wavelength, and f is the frequency.

Since the top of the pipe is open and the bottom is closed, we have a node at the bottom and an anti-node at the top.

The wavelength can be calculated using the formula λ = 2L/n, where L is the length of the pipe. Substituting the values, we get λ = 2(0.50m)/7 = 0.14m.

The speed of sound in air at room temperature is approximately 343 m/s. Thus, we can calculate the frequency as follows:

v = nλf
f = v/(nλ)
f = 343/(7*0.14)
f = 347.6 Hz

Therefore, the frequency created by this standing wave with n=7 in a pipe of 0.50m length and filled with air at room temperature is approximately 347.6 Hz.

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\( \qquad \qquad \bf \huge\star \: \: \large{ \underline{Answer} } \huge \: \: \star\)

\(\textsf{ \underline{\underline{Steps to solve the problem} }:}\)

In the given equation :

\( \qquad❖ \: \sf \:y = a + b + c( {t}^{2} )\)

If three physical quantities is to be added or subtracted, they must have same dimensions.

So, dimension of y = dimension of c(t²)

And we already know,

( by squaring )

Now, we need to calculate dimension and unit of c :

\( \qquad❖ \: \sf \:dim(y) = dim(c {t}^{2} )\)

\( \qquad❖ \: \sf \:M⁰L¹T⁰ = dim(c) \sdot M⁰L⁰T²\)

\( \qquad❖ \: \sf dim(c) = \frac{M⁰L¹T⁰}{ M⁰L⁰T²} \)

\( \qquad❖ \: \sf dim(c) = {M⁰L¹T {}^{ - 2} }\)

Now, we got the dimension of c as :

So, it's SI unit will be :

[ since SI unit of length/distance = m, and SI unit of Time = sec, hence SI unit of T² = s² ]

Question

If y = a + by + c(t)^2 where y = distance , t = time , find the dimension and unit of c.

\(\boxed{\green{c=M^0L^1T^{-2}}}\)

Solution Given:

We know that

Law of Homogeneity of Dimensions In any correct equation representing the relation between physical quantities, the dimensions of all the terms must be the same on both sides.

Dimension of Time is denoted by [T]

Dimension of distance is denoted by [L]

Dimension of mass is denoted by [M]

So,

Dimension of a, by, c(t)^2  should be equal to y.

y=[L] .......[1]

a=[L].......[2]

by=[L].......[3]

c(t)^2=[L].....[4]

Now

The dimension of c can be obtained as:

c(t)^2=[L]

c= \( \frac{[L]}{[T^2]}\)

\(\boxed{\green{c=M^0L^1T^{-2}}}\)

Sry for late!!

Answer:

after about 7 hours

Explanation:

450 + 550 = 1000

7000 / 1000 = 7 h

a. The external area of the 1 μm³ cube-shaped kaolinite particle is 6 μm².

b. The mass of the particle is approximately 2.65e-12 grams.

c. The specific surface area of kaolinite is approximately 2.26 million square meters per gram.

a. To calculate the external surface area of the kaolinite particle, we need to find the area of each face of the cube and sum them up.

The cube has six faces, each with an area of (1 μm)² = 1 μm².

b. The mass of the kaolinite particle can be calculated using its volume and particle density.

The volume of the particle is 1 μm³.

To convert the volume to cubic meters, we divide by 1,000,000,000 (1 μm³ = 1/1,000,000,000 m³).

So the volume of the particle is 1/1,000,000,000 m³.

The mass is then calculated by multiplying the volume by the particle density:

Mass = Volume x Particle density

Mass = (1/1,000,000,000 m³) x 2.65 Mg/m³

Mass = 2.65/1,000,000,000 Mg

Mass = 2.65 μg

c. The specific surface area of kaolinite is the external surface area of the particle per unit mass.

Specific surface area = External surface area / Mass

Specific surface area = (6 μm²) / (2.65 μg)

Specific surface area = 2.26 μm²/μg

To convert to m²/g, we divide by 1,000,000 (1 μm² = 1/1,000,000 m² and 1 μg = 1/1,000,000 g).

Specific surface area = 2.26/1,000,000 m²/g

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The first nanosatellite from Bhutan to be launched into space was named BHUTAN-1. The satellite was created as part of the Birds-2 program at the Kyushu Institute of Technology. The Birds program aids nations in launching their initial satellite. On June 29, 2018, BHUTAN-1 was put into orbit by the SpaceX CRS-15 mission. On August 10, 2018, it was released from the International Space Station's (ISS) Kib module. The Earth was captured by the satellite's cameras.

The BHUTAN-1 (Bhutan), UiTMSAT-1 (Malaysia), and Maya-1 satellites were created as part of the Birds-2 program (Philippines). Graduate students from Bhutan who were attending Kyutech to complete their master's degrees created BHUTAN-1 (Kyushu Institute of Technology).

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In the event of an accident or a car crash, road safety barriers and fences prevent automobiles from running off the road.

Newton's Three Laws of Physics can help explain what these safety barriers are and how they help to save lives during car accidents :

I.  Unless acted upon by an imbalanced force, an object at rest will remain at rest, and an object at constant velocity will remain at constant velocity.

II.  If an imbalanced force occurs, a mass will experience acceleration proportional to its magnitude.

III.  When you apply a force to an object, you will feel a force that is equal    in magnitude but opposite in direction.

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The two subfields of psychology that are similar and involve diagnosing and treating mental disorders are Clinical psychology and the Counseling psychology. Therefore, the correct answer is:  C).

Clinical psychology and Counseling psychology. Both of these subfields involve the assessment, diagnosis, and treatment of mental health disorders, although they may differ in their focus and approach. Clinical psychology tends to the focus on more severe mental health issues, such as schizophrenia and the bipolar disorder, while Counseling psychology tends to focus on a wider range of issues, such as stress management, relationship problems, and career counseling. Hence correct answer is : C) .

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Answer:

5.66 m

Explanation:

From online sources, the speed in item 3 being referred to was discovered to be 7.62 m/s

Now, let's get the time of flight from one of Newton's equation of motion;

S = ut + ½gt²

Considering the vertical component, we have u = 0 m/s.

Thus;.

S = ½gt²

Plugging in the relevant values;

2.7 = ½ × 9.8 × t²

t² = 2.7/4.9

t = √(2.7/4.9)

t = 0.7423 s

Now, when we consider the horizontal component of the motion, we have;

S = vt

Where;

S is the distance the fish will travel horizontally before hitting the water.

v = 7.62 m/s

t = 0.7423

Thus

s = 7.62 × 0.7423

s ≈ 5.66 m

Answer:  

C. Software Engineer

Thermodynamics can be said to be a branch of Physics which involves the transfer of heat and other energy forms.

Thermal energy is the energy possesed by a system due to its temperature.

In thermodynamics, during the transfer of thermal energy, energy is wasted due to entryopy. And entropy is the measure of disorder of a system.

Therefore, in amy thermodynamic system that deals with the transfer of thermal energy, the most ideal state for that system is Entropy

ANSWER:

A. Entropy

Answer: loss of hair cells

Explanation:

The hair cells in the ear canal create the essential vibrations needed for both the ear and brain to process the sound, without them, vibrations cannot be fully developed.

Answer: Loss of hair cells

Explanation: I got it right on the quiz

The relation between the time-period of the transverse wave for the third harmonic and the time between the maximum displacement and minimum displacement is \(=16.3 \mathrm{~g}\)

\($$T_3=2 t$$Substitute$8.40 \mathrm{~ms}$\)

for t in the above expression.

\($$T_3=2(8.4 \mathrm{~ms})\left(\frac{10^{-3} \mathrm{~s}}{1 \mathrm{~ms}}\right)$$\)

The wave velocity can be given by the following expression \(=0.0168 \mathrm{~s}\)

\(v=\frac{\lambda_3}{T_3}\)

Here,

\($$\lambda_3$$\)

is the frequency of third harmonics and

\($$T_3$$\)

is the time-period of third harmonics.

Substitute \($0.1296 \mathrm{~m}$\) for

\($$\lambda_3$$\)

and

\($0.0168 \mathrm{~s}$ for$T_3$\)

\(\begin{aligned}& v=\frac{0.1296 \mathrm{~m}}{0.0168 \mathrm{~m}} \\& =7.714 \mathrm{~m} / \mathrm{s}\end{aligned}\)

The expression of the wave velocity is given by the following expression.

\(v=\sqrt{\frac{T}{m / L}}\)

Rearrange the above expression for

\($$m$$\)

\(\text { Substitute } 5.00 \mathrm{~N} \text { for } T, 0.1944 \mathrm{~m} \text { for } L \text {, and } 7.714 \mathrm{~m} / \mathrm{s} \text { for } v \text { in the above expression. }\)

\(\begin{gathered}m=\frac{(5.00 \mathrm{~N})(0.1944 \mathrm{~m})}{(7.714 \mathrm{~m} / \mathrm{s})^2} \\=(0.0163345 \mathrm{~kg})\left(\frac{1000 \mathrm{~g}}{1 \mathrm{~kg}}\right) \\=16.3 \mathrm{~g}\end{gathered}\)

The anti-nodes in the standing waves are at a distance half a wavelength. The time-period is twice the time from maximum displacement to minimum displacement of the anti-node.

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A square loop of wire that encloses an area of 0.20 m² is in a uniform magnetic field of 0.10 t. The flux through the loop if its plane is at an angle of 62 degrees to the field is 1.8 × 10⁻² Wb.

The amount of magnetic field lines passing through a loop of area A which is tilted at angle θ from the field is defined as magnetic flux and is found by the below formula Φm = B A cos ⁡θ.

Given,

Area of the loop, A = 0.20 m² = 20 × 10⁻² m²,

Magnetic field, B = 0.10T,

As we know, Magnetic flux through a loop (Φm),

⇒ Φm = BA cos ⁡θ

⇒ Фm = 0.1 × 20 × 10⁻² × cos 62°

⇒ Фm = 2 × 10⁻² × 0.47

⇒ Фm = 1.8 × 10⁻² Wb.

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A cannonball has more kinetic energy than the recoiling cannon from which it is fired because the force on the ball acts over a longer distance.

When a cannon fires a cannonball, both the cannon and the cannonball experience an equal and opposite force (Newton's third law).

However, the cannonball has more kinetic energy because the force on it acts over a longer distance.

The cannonball travels a greater distance in the air, while the cannon's motion is restricted due to friction between it and the ground.

This results in a larger work done on the cannonball, which in turn results in more kinetic energy.

Summary: The cannonball has more kinetic energy than the recoiling cannon because the force acts over a longer distance for the cannonball, resulting in more work done and greater kinetic energy.

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Answer:

3.75m/s²

Explanation:

g= GM/r²

For planet 1

\(g_{1}\)= GM/r²                   (i)

\(g_{1}\) = 15m/s²

for planet 2

radius= 2*r= 2r

g= GM/r

\(g_{2}\)= GM/(2r)²

\(g_{2}\)= GM/4r²

\(g_{2}\)=  GM/r² *1/4

from (i)

\(g_{2}\)=  \(g_{1}\) *1/4

\(g_{2}\) = 15/4

\(g_{2}\) = 3.75m/s²