A 1.0-kg ball on the end of a string is whirled at a constant speed of 2.0 m/s in a horizontal circle of radius 1.5 m. What is the work done by the centripetal force during one revolution

Explanation:

final velocity =?

initial velocity = 5m/s

acceleration = 3 m/s^2

time =4 sec

now,

acceleration = final velocity-intail velocity / time taken

a = v-u /t

3=v-5/4

3×4=v-5

12 = v -5

12+5 = v

17 =v

v=17 m/s

Answer:

Her computer is producing thermal energy, not heat.

Explanation:

Answer:

Her computer is producing thermal energy,not heat

Explanation:

The speed of sound in air is approximately 336 m/s.

When sound waves are produced by the source, they travel through the air inside the tube towards the closed end. At the closed end, the sound waves are reflected back towards the open end of the tube. At the open end, the sound waves are once again reflected, but this time they interfere constructively with the original sound waves. This interference leads to the formation of a standing wave pattern inside the tube. The powder inside the tube collects in heaps at the locations where the sound waves create points of maximum displacement, called antinodes.

Since the frequency of the sound wave is known, the distance between adjacent antinodes can be calculated using the formula:

d = λ/2

where d is the distance between adjacent antinodes, and λ is the wavelength of the sound wave.

Using the distance between adjacent antinodes (d = 8.0 cm = 0.08 m), we can calculate the wavelength of the sound wave:

λ = 2d = 2 x 0.08 m = 0.16 m

We can also use the formula for the speed of sound in air to calculate the speed of sound:

v = fλ

where v is the speed of sound, f is the frequency of the sound wave, and λ is the wavelength of the sound wave.

Substituting the values, we get:

v = 2100 Hz x 0.16 m = 336 m/s

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The force that results in the decrease in speed from the midpoint to the end of the track is friction. The friction force slows down the vehicle because it acts in the opposite direction of the car's motion.

The force that would cause the Hot Wheels car to slow down from the midpoint of the track to the end of the track is friction between the car's wheels and the track.

Friction is a force that opposes motion between two surfaces in contact.

In this case, the wheels of the car and the surface of the track are in contact, and the friction force acts in the opposite direction of the car's motion, which slows it down.

As the Hot Wheels car travels down Track #2 during the Speed Lab activity, its initial velocity decreases due to friction.

Friction is a resistance force that opposes motion.

It is caused by the interaction between the surfaces in contact. In this case, the surface of the track and the wheels of the car are in contact.

When the car is moving, there is friction between the two surfaces.

The direction of the friction force is opposite to the direction of motion of the car.

This means that the friction force slows the car down.

In conclusion, the force that results in the decrease in speed from the midpoint to the end of the track is friction.

The friction force slows down the vehicle because it acts in the opposite direction of the car's motion.

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Answer:

A. the motion of an object along a curved path

Answer:

When a heavy football player and a light one run into each other, does the lighter player really exert as much force on the heavy player s the heavy player exerts on the light one. Yes. The interaction between the two players, the force each exerts on the other have equal strength.

Explanation:

all except the rubber boots.

The answers should be The power lines themselves and The metal tools the worker uses (the 1st and 4th choices).

(For anyone curious, the image I attached to this answer is the image given for this problem.)

Answer:

\(d_2=3.16cm\)

Explanation:

So, in order to solve this problem, we must start by building a diagram of the problem itself. (See attached picture) And together with the diagram, we must build a free body diagram, which will include the forces that are being applied on the given charged particle together with their directions.

In this case we only care about the x-direction of the force, since the y-forces cancel each other. So if we do a sum of forces on the x-direction, we get the following:

\(\sum{F_{x}}=0\)

so:

[Tex]-F_{12}+F_{13x}+F_{14x}=0\)

Since \(F_{13x}=F_{14x}\) we can simplify the equation as:

\(-F_{12}+2F_{13x}=0\)

we can now solve this for \(F_{12}\) so we get:

\(F_{12}=2F_{13x}\)

Now we can substitute with the electrostatic force formula, so we get:

\(k_{e}\frac{q_{1}q_{2}}{r_{12}^{2}}=2k_{e}\frac{q_{1}q_{3}}{r_{13}^{2}}cos \theta\)

We can cancel \(k_{e}\) and \(q_{1}\)

so the simplified equation is:

\(\frac{q_{2}}{r_{12}^{2}}=2\frac{q_{3}}{r_{13}^{2}}cos \theta\)

From the given diagram we know that:

\(cos \theta = \frac{d_{1}}{r_{13}}\)

so when solving for \(r_{13}\) we get:

\(r_{13}=\frac{d_{1}}{cos\theta}\)

and if we square both sides of the equation, we get:

\(r_{13}^{2}=\frac{d_{1}^{2}}{cos^{2}\theta}\)

and we can substitute this into our equation:

\(\frac{q_{2}}{r_{12}^{2}}=2\frac{q_{3}}{d_{1}^{2}}cos^{3} \theta\)

so we can now solve this for \(r_{12}\) so we get:

\(r_{12}=\sqrt{\frac{d_{1}^{2}q_{2}}{2q_{3}cos^{3}\theta}}\)

which can be rewritten as:

\(r_{12}=d_{1}\sqrt{\frac{q_{2}}{2q_{3}cos^{3}\theta}}\)

and now we can substitute values.

\(r_{12}=(3cm)\sqrt{\frac{7x10^{-19}C}{2(2x10^{-19}C)cos^{3}(20^{o})}}\)

which solves to:

\(r_{12}=6.16cm\)

now, we must find \(d_{2}\) by using the following equation:

\(r_{12}=d_{1}+d_{2}\)

when solving for \(d_{2}\) we get:

\(d_{2}=r_{12}-d_{1}\)

when substituting we get:

\(d_{2}=6.16cm-3cm\)

so:

\(d_{2}=3.16cm\)

Answer:

The angle between the electric field lines and the equipotential surface is 90 degree.

Explanation:

The equipotential surfaces are the surface on which the electric potential is same. The work done in moving a charge from one point to another on an equipotential surface is always zero.

The electric field lines are always perpendicular to the equipotential surface.

As

\(dV = \overrightarrow{E} . d\overrightarrow{r}\\\\\)

For equipotential surface, dV = 0 so

\(0 = \overrightarrow{E} . d\overrightarrow{r}\\\\\)

The dot product of two non zero vectors is zero, if they are perpendicular to each other.

The resistance of the resistor of the circuit is 5 ohms.

Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.

The law states that the voltage across a circuit is directly proportional to the current flowing in the circuit.

V = IR

where;

The given parameters include;

current in the circuit = 7 A

the emf of the circuit, E = 35 V

The resistance of the resistor of the circuit is calculated as follows;

R = V/I

R = 35 / 7

R = 5 ohms

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Answer:

Explanation:

PE = mgh

h = PE/mg

h = 2000/(65.0(9.81))

h = 3.1365168979...

h = 3.14 m

a VERY strong man if he can do that!

Answer:

The smart car hit with the greater force

Explanation:

Despite the trailers weight, the smart car moves with more speed and momentum than that of the trailer...

I don't even understand what I'm typing

Both will exert equal and opposite force on each other.

When a tractor-trailer and a smart car collide head-on, we can determine the relative forces experienced by each vehicle using Newton's second law of motion.

According to this law, the force acting on an object is equal to the rate of change of its momentum.

Let's consider the tractor-trailer as object 1 with mass \(\(M_1\)\) and velocity \(\(V_1\)\), and the smart car as object 2 with mass \(\(M_2\)\) and velocity \(\(V_2\)\).

The force exerted on object 1 due to object 2 \((\(F_{12}\))\) can be calculated as:

\(\[F_{12} = M_1 \cdot \frac{{dV_1}}{{dt}}\]\)

Similarly, the force exerted on object 2 due to object 1 \((\(F_{21}\))\) can be calculated as:

\(\[F_{21} = M_2 \cdot \frac{{dV_2}}{{dt}}\]\)

Since the collision is head-on, the direction of the forces will be opposite for the two objects.

To determine which object experiences a greater force, we need to compare the magnitudes of \(\(F_{12}\) and \(F_{21}\)\) = 0 by Newton's third law.

Thus, both will exert equal and opposite force on each other.

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Answer:

the measured charge will be -2 elementary charges.

Explanation:

Answer:Magnetic fields from two sources add up as vectors at each point, so the strength of the field is not necessarily the sum of the strengths1. Magnetic fields are vectors, which means they have direction as well as size. Therefore, the sum of two magnetic fields is not simply the sum of their magnitudes2.

Explanation:

The frequency of f3 is approximately 716 Hz.

The frequency of a repeated event is its number of instances per unit of time. Hertz (Hz), which stands for the number of cycles per second, is a popular unit of measurement.

a. Given two frequencies, f1 and f2, the frequency ratio is as follows:

frequency ratio= \(\frac{f2}{f1}\)

Inputting the values provided yields:

frequency ratio = \(\frac{576}{320Hz}\) =1.8.

As a result, the difference in frequency between f1 = 320 Hz and f2 = 576 Hz is 1.8.

b. Since there are 12 half-steps in an octave and a fourth is a distance of 5 half-steps, going down a fourth requires dividing the frequency by \(2^{(4/12)}\). Hence, once a fourth is subtracted, the frequency ratio between f and f1 is:

frequency ratio= \(\frac{f}{ (f1 /f2 ) }\)=  \(\frac{f}{ (f1 / 1.3348) }\)

By dividing the numerator and denominator by 1.3348, we may make this more straightforward:

frequency ratio= (f × 1.33348)/f1

As a result, (f × 1.3348) / f1 is the frequency ratio between f and f1 after descending a fourth.

c. (c) To find the frequency of f3, we need to know the interval between f1 and f3. Let's assume that f3 is a fifth above f2. The frequency ratio for a fifth is given by: \(2^{(7/12)}\) = 1.49831

Therefore, the frequency of f3 is:

f3 = f1 × (\(2^{(7/12)}\)) × (\(2^{(7/12)}\)) = 320 Hz × 1.49831 ×1.49831 = 716 Hz

Therefore, the frequency of f3 is approximately 716 Hz.

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Answer:

Explanation:

In vertebrates, the circulatory system is responsible for transporting oxygen to all the tissues and removing carbon dioxide from them. ... In the grasshopper, exchange of oxygen and carbon dioxide occurs in the tracheal system. Hemolymph plays no part in the process.

Answer & Explanation:

Formula

Acceleration = change in velocity / time taken

Acceleration = 5 / 300

Acceleration = 0.016

hence final answer = 0 m / s^2

Humans would need a breathable environment like that on Earth in the living section of a colony on Venus in order to survive. Nitrogen, oxygen, and trace amounts of other gases, such as carbon dioxide, make up the majority of the atmosphere on Earth.

The clouds are made of sulfuric acid, and the atmosphere is primarily carbon dioxide, the same gas that causes the greenhouse effect on Venus and Earth. And the heated, high-pressure carbon dioxide acts corrosively at the surface.

For instance, compared to Earth, which has 99% nitrogen and oxygen in its atmosphere, Venus and Mars both contain more than 98% carbon dioxide and nitrogen.

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The load lifted by the double pulley with the given efficiency and applied effort is determined as 30 N.

The amount of load lifted by the pulley is calculated by applying the formula for efficiency of a machine as follows;

E = L / E   x  100%

where;

The amount of load lifted by the pulley is calculated as;

60 = L / 50   x 100%

60 = 100L / 50

100L = 50 x 60

100 L = 3000

L = 3000 / 100

L = 30 N

Thus, the amount of load lifted by the pulley is 30 N.

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The complete question is below:

the efficiency of combine double pulley is 60%. how much load is lifted using 50n effort​?

a. The minimum force required to start moving the block is 9.8 N

b.  The force required to continue moving the block at a constant velocity is 5.88 N.

c. If a force greater than 9.8 N is applied, the block will start moving and continue to move until the applied force is less than 5.88 N.

a. Force = μs * N

N = m * g = 2.0 kg * 9.8 m/s^2 = 19.6 N

Force = μs * N = 0.50 * 19.6 N = 9.8 N

b. Force = μk * N = 0.30 * 19.6= 5.88 N N

c. In conclusion, If a force greater than 5.88 N is applied, the block will accelerate. If a force less than 5.88 N is applied, the block will decelerate and eventually stop if the force becomes less than the force of static friction (9.8 N).

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Answer:

49 N (d)

Explanation:

w= mg = 5 kg * 9.8 m/s^2 = 49 N

The weight of a 5.0-kilogram object at the surface of Earth is 49 N. Hence, option (C) is correct.

Mass is a fundamental quantity in physics and the most fundamental attribute of matter. Mass can be defined as the amount of matter contained in a body. Kilogram is the SI unit of mass (kg).

A body's mass does not alter at any time. Only in severe instances where a massive amount of energy is provided or removed from the body.

The force of gravity acting on a body is measured by weight. The weight formula is as follows: w = mg. Because weight is a force, it has the same SI unit as force; the SI unit of weight is Newton (N).

The weight of the  object is = 5.0 × 9.8 N

= 49.0 N.

Hence, option (B) is correct.

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Explanation:

The force of attraction between two charged objects is given by Coulomb's law:

F = k * (q1 * q2) / r^2

where:

F is the force of attraction

k is Coulomb's constant, which has a value of 9.0 x 10^9 N*m^2/C^2

q1 and q2 are the charges of the two objects

r is the distance between the two objects

In this case, we have two balloons with the same charge of +4.0 x 10^-6 C each, and they are held at a distance of 0.41 m from each other. Plugging these values into Coulomb's law, we get:

F = 9.0 x 10^9 N*m^2/C^2 * [(+4.0 x 10^-6 C)^2] / (0.41 m)^2

F = 1.92 x 10^-3 N

Therefore, the force of attraction between the two balloons is 1.92 x 10^-3 N.

Answer:

A & D your welcome

Propanol surface is more flattered and has less boiling point than that of water.

To determine the correct statements among all the statements, we need to know about the surface tension.

Since, propanol has less surface tension than that of water, so its surface is more flattered and has less boiling point than that of water.

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The reactants in the given chemical equation are methane (CH₄) and oxygen (O₂), while the products are carbon dioxide (CO₂) and water (H₂O).

During a chemical reaction, the atoms of the reactants reorganize to form new compounds in the products. A chemical change is this atomic rearrangement.

A chemical change is the transformation of one or more substances into new ones with distinct chemical and physical properties. New substances are created when the original substances' atoms are rearranged and new chemical bonds are formed during a chemical change.

Typically, a transfer of energy in the form of heat, light, or sound occurs in conjunction with this kind of change. Reactions like combustion, oxidation, decomposition, and synthesis are all examples of chemical changes. Physical changes, on the other hand, involve alterations in a substance's physical properties without altering its chemical composition.

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Explanation:

..........the answer is insulater

Answer:

0.882 m/s average velocity and 1.71 m/s average speed

Explanation:

The dog travels a total of 35 m west and 110 m east.

110-35 = 75 m east of the starting position. Since velocity is a vector you must consider its first and final position and not the total distance traveled.

75 m / 85 s = 0.882 m/s average velocity

Speed is not concerned with direction so we instead add the total distance traveled which is 35+110 = 145 m. We then perform the same operation as before and divide by the time it took to run this distance.

145 m / 85 s = 1.71 m/s average speed

The current (in amperes) the frying pan draws from the 500 volt circuit, given that it has a resistance of 25 ohms is 60 amperes

From the question given above, the following data were obtained:

The current drawn by the frying pan can be obtained as follow:

Voltage (V) = Current (I) × resistance (R)

Inputting the given parameters, we have:

1500 = Current × 25

Divide both sides by 25

Current = 1500 / 25

Current = 60 amperes

Thus, from the above calculation we can conclude that the current drawn by the frying pan is 60 amperes

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Answer:

400 W

Explanation:

Ignoring the efficiency rating for the transformer we have to assume 100% .. Also, the power input to primary is equal to the power output in secondary.

This means that power input = 400 W = power output

Answer:

It states that the magnitude of force is directly proportional to the product of charges at points and inversely proportional to the square of their separation distance

Explanation:

\({ }\)

Answer:

It states that the magnitude of force is directly proportional to the product of charges at points and inversely proportional to the square of their separation distance

Explanation:

\({ }\)

A periodic variable's amplitude is a measure of its change over a single period.

The number of waves that pass through a specific spot in a given amount of time is referred to as the wave frequency. The hertz is the SI unit for wave frequency (Hz).

The wavelength is the distance between two wave crests, and it is also the distance between two wave troughs. It is important to note that wavelength is calculated as:

= Speed / Frequency

= 75 / 5.42

= 13.84m

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Complete question

With speed of 75m/s and period 5.42ms. Calculate the. wavelength.