A disk with radius of 0. 5 m is free to rotate around its center without friction. A string wrapped around the disk is pulled, as shown above, exerting a 2 n force tangent to the edge of the disk for 1 s. If the disk starts from rest, what is its angular speed after 1 s?.

Given data:

* The distance traveled by the air conditioner is,

Solution:

As the air conditioner is falling freely under the action of gravity.

Thus, the acceleration of the air conditioner is equal to the acceleration due to gravity.

As the air conditione ris falling itself from the height.

Thus, the initial velocity of the air conditoner is,

By the kinematics equation, the final velocity of the air conditioner is,

Substituting the known values,

Thus, the final velocity of the air conditioner is 21.69 m/s.

By the kinematics equation, the time taken by the air conditioner,

where t is the time taken by the air conditioner to reach the ground,

Substituting the known values,

Thus, the time taken by the air conditioner ot reach the ground is 2.21 seconds.

F = 0(I1I2L)/(2d) represents the force between two parallel wires, where 0 is the permeability of free space, L represents the wires' length, and d represents the spacing between the wires. We obtain r = 5.02 by solving for r in the formula F = I2 r and substituting the supplied values.

F = 0(I1I2L)/(2d), where 0 is the permeability of empty space, I1 and I2 are the currents flowing through the wires, L is the length of the wires, and d is the distance between the wires, calculates the force between two parallel wires. The formula F = I2 r, where F is the force between the wires and I2 is the current running through one of the wires, may be used to determine the resistance value that will produce a force of 1.26x10-4 N. We get r = 5.02 by entering the specified data into these calculations. This indicates that a resistor with a value of 5.02 ohms would produce a force between the two of 1.26x10-4 N.

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Answer:

3.white light

Explanation:

In a parallel circuit, each lamp is connected to the power source independently, meaning that the lamps are not directly connected to each other. Therefore, if one lamp filament breaks in this setup, the other three lamps will continue to work unaffected.

When the filament of one lamp breaks, it essentially opens the circuit for that particular lamp. However, the remaining lamps are still connected in parallel, so the current can flow through them independently. The other lamps will continue to receive electricity from the power source and light up normally.

This behavior is a characteristic of parallel circuits, where each component has its own individual connection to the power source. If the lamps were connected in series, the situation would be different. In a series circuit, a break in one lamp's filament would interrupt the flow of current throughout the entire circuit, and all the lamps would go out.

That's a pretty good intuitive definition of a theory .

Answer:

10m/s I believe

Explanation:

F=MA

A=F/M

A=2/0.2

A=10m/s

Answer:

satisfaction, enjoyment and fair play

Answer:

It is important to be a good sport, and even if you do not win still be happy about being able to participate, and congratulate the person that did win.

Explanation:

Hope this helped Bye!

The quantity that will have the same value along their paths is their acceleration option (D).

The rate at which the speed and direction of a moving object alter over time is known as acceleration. When anything begins to move faster or slower, it is said to be accelerating.

If we ignore air resistance, there will only be one force acting on the balls because they are all hurled straight up into the air: the force of gravity.

Where m is the ball's mass, the force of gravity acting on each ball is given by

The acceleration caused by gravity is known as g (9.8 m/s², downhill).

According to Newton's second law,

F=ma,

where F is the net force exerted on the ball:

And after simplifying, we discover that the acceleration of each ball is: and since g is a constant value, we draw the conclusion that each ball's acceleration is the same regardless of mass or initial speed.

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Complete question is "If several balls are thrown straight up with different initial speeds, the quantity that will have the same value along their paths is their(A) initial momentum.(B) maximum height.(C) time of travel.(D) acceleration".

Answer:

Her displacement is 0 miles and her distance is 5 miles.

Explanation:

Given information:

Sophie runs in an oval track. The length of track is 5 m.

Distance is the total length of path covered during motion while displacement is the shortest distance between initial and final position.

In this case, Sophie completes one cycle in the oval track and the track length is 5 m. So, the distance covered by her will be 5 m.

Now, after completing the track, the initial and final position of Sophie will be same and hence, the displacement she covered will be 0 miles.

Therefore, option "Her displacement is 0 mile and her distance is 5 miles" is correct.

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The displacement of Sophie is 0 and her distance is 5 m

The displacement of Sophie is the change in her position.

If she runs in an oval track, she will return to her initial starting position. The initial position and the final position will be equal, the change in her displacement will be zero.

\(\Delta x = x_f- x_i\\\\\Delta x = 5 - 5 = 0\)

The distance traveled by Sophie is the sum of the total distance covered.

distance = 5 m

Thus, the displacement of Sophie is 0 and her distance is 5 m

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This circuit's power dissipation will drop to half of what it was before.

Ohm's Law states that V=IR, where V is voltage, I is current, and R is resistance. We can solve for current and observe the outcome by substituting 2V for V. I=2(VR) would apply in this situation. Therefore, it is clear that for a given resistance, the current doubles if the voltage does as well.

Let's assume that resistance is R and that power is P. If we change the resistance to 2 R, new power P1 = V2 / 2 R = 1/2 (V2 / R) = P, the power dissipated by this circuit will drop to half its original value .

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Answer:

B

Explanation:

The first modern personality test was the Woodworth Personal Data Sheet, which was first used in 1919. It was designed to help the United States Army screen out recruits who might be susceptible to shell shock.

so, B is correct

Answer:

The answer is B, I hope this helps.

Answer:

1,110,114.6 J

Explanation:

The height is 1857m, the mass is 61 kg, and the accelaration is 9.8 m/s^2. Plug in the equation GPE=h*m*a and you get 1,110,114.6.

h= height

m= mass

a= accelaration

GPE= gravitational potential energy

If you are at the grand canyon standing at the edge of a ledge 1857 meters high you have a mass of 61 kilograms, then your gravitational potential energy at the edge of the cliff would be 1111247.37 Joules.

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy.

As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system.

ME = KE + PE

The total gravitational potential energy at the edge of the cliff would be

PE = m × g × h

PE =61 × 9.81 × 1857

PE =1111247.37 Joules

Thus, the total gravitational potential energy at the edge of the cliff would be  1111247.37 Joules.

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The maximum voltage across the capacitor is 2.1 * 10⁻² V and the initial energy in the capacitor is 7.042 * 10⁻⁶ J.

In the L-C oscillation, energy is transferred between capacitor and inductor with a certain periodicity.

Given that, Inductance L = 65 * 10⁻³ h

Capacitance C = 300 * 10⁻⁴ F

Initial charge q = 6.5 * 10⁻⁴ C

We know that,

1/2 q²/C + 1/2 L² = 1/2 C* v₀²

From the above equation, we can write v₀ = q/C

Substituting the values in the above equation, we get

v₀ = q/C = (6.5 * 10⁻⁴) / (300 * 10⁻⁴) = 0.021 V = 2.1 * 10⁻² V

The formula to calculate initial energy in the capacitor is 1/2* q²/C

where q is charge and C is capacitance

E = 1/2 * q²/C = (6.5 * 10⁻⁴)²/ 2 * (300 * 10⁻⁴)

⇒ (42.25 * 10⁻⁸)/ (6 * 10⁻²)

⇒ 7.042 * 10⁻⁶ J

Thus, maximum voltage across the capacitor is 2.1 * 10⁻² V and the initial energy in the capacitor is 7.042 * 10⁻⁶ J.

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The force applied to an item in curvilinear motion that is pointed at the center of rotation or the center of curvature is known as a centripetal force. Mass* centripetal acceleration is used to determine

The provided ball weighs 0.35kg.

Given is a centripetal acceleration of 5 m/s2.

The centripetal force's magnitude must be determined.

Calculation

Centripetal force = mass*centripetal acceleration

                             = 0.35*5

                             =  1.75N

Hence , the centripetal force is 1.75N

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Answer:

No Lo se :v esque estoy enferma del

Answer:

The thermal efficiency, \(\eta _{reheat}\), of the Rankine cycle with reheat is 36.81%

Explanation:

p₁ = 8 MPa = 80 Bars

T₁ = 450°C = 723.15 K

From steam tables, we have;

v₁ = 0.0381970 m³/kg

h₁ = 3273.23 kJ/kg

s₁ = 6.5577 kJ/(kg·K) = s₂

The p₂ = 0.8 MPa

T₂ = Saturation temperature at 0.8 MPa = 170.414°C = 443.564 K

h₂ = 2768.30 kJ/kg

\(T_{2'}\) = 400°C = 673.15 K

\(h_{2'}\) = at 400°C and 0.8 MPa = 3480.6 kJ/kg

p₃ = 10 kPa = 0.1 Bar

T₃ = Saturation temperature at 10 kPa = 45.805 °C = 318.955 K

h₃ = 2583.89 kJ/kg

h₄ = \(h_{3f}\) = 191.812 kJ/kg

The thermal efficiency, \(\eta _{reheat}\), of a Rankine cycle with reheat is given as follows;

\(\eta _{reheat} = \dfrac{\left (h_{1}-h_{2} \right )+\left (h_{2'}-h_{3} \right )-W_{p}}{h_{1}-\left (h_{4}+W_{p} \right )+\left (h_{2'}-h_{2} \right )}\)

Therefore, we have;

\(\eta _{reheat} = \dfrac{(3273.23 -2768.30 ) + (3480.6 -2583.89 ) - 8.04)}{(3273.23 -(191.812 + 8.04) + (3480.6 -2768.30 ) } = 0.3681\)

Which in percentage is 36.81%.

The least possible uncertainty in a measurement of the speed of an electron in an atom of lead, expressed as a percentage of the average speed, is approximately 0.85%.

The uncertainty in the measurement of the speed of an electron can be determined using the Heisenberg uncertainty principle, which states that there is a fundamental limit to the precision with which certain pairs of physical properties, such as position and momentum, can be known simultaneously. Mathematically, the uncertainty principle is expressed as:

\(\(\Delta x \cdot \Delta p \geq \frac{h}{4\pi}\)\)

where \(\(\Delta x\)\) is the uncertainty in position, \(\(\Delta p\)\) is the uncertainty in momentum, and h is the reduced Planck's constant.

In this case, we are interested in the uncertainty in the speed of the electron, which is related to its momentum. The momentum of an electron can be approximated as \(\(p = m \cdot v\)\), where m is the mass of the electron and v is its velocity. Since the mass of the electron remains constant, the uncertainty in momentum can be written as:

\(\(\Delta p = m \cdot \Delta v\)\)

To find the uncertainty in velocity, we can rearrange the equation as:

\(\(\Delta v = \frac{\Delta p}{m}\)\)

Now, we can substitute the values given in the problem. The mass of an electron is approximately \(\(9.10938356 \times 10^{-31}\)\) kg, and the average orbital speed is \(\(1.8 \times 10^8\)\) m/s. The uncertainty in velocity can be calculated as:

\(\(\Delta v = \frac{\Delta p}{m} = \frac{\frac{h}{4\pi}}{m} = \frac{h}{4\pi \cdot m}\)\)

Substituting the known values, we get:

\(\(\Delta v = \frac{6.62607015 \times 10^{-34}}{4\pi \cdot 9.10938356 \times 10^{-31}} \approx 2.20 \times 10^{-3}\) m/s\)

Finally, we can express the uncertainty in velocity as a percentage of the average speed:

\(\(\text{Uncertainty \%} = \frac{\Delta v}{\text{Average speed}} \times 100 = \frac{2.20 \times 10^{-3}}{1.8 \times 10^8} \times 100 \approx 0.85\%\)\)

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Answer:

At the Berlin 2009 World Championships, Bolt set a world record time of 9.58 seconds for the 100m race, notching a top speed of 27.8 miles per hour (44.72 kilometers per hour) between meters 60 and 80, with an average speed of 23.5 mph.

Explanation:

Answer:

l think that the answer is 10.hope this helps . Can you mark me the brainest pliz.lt's LAURA RAYS AMIRA.

Answer:

Explanation:

700-40 = 760

760/10 = 76

It will take her 76 days to finish the book

Answer:

10.7 seconds (1d.p)

Explanation:

To find time, do distance over speed. Thus, 139 divide 13 equals 10.7.

as the unit is in m/s. Then 10.7 will be in seconds.

Answer:

A boy runs a distance of 10km at speed of 15km/hr and continues to Moves an acceleration of 1.5m

Answer:

Transverse Wave

Explanation:

Longitudinal: vibrates in the same direction

Propagated: the direction the wave travels (specific to wave type)

Amplitude: from equilibrium to crest or trough

A projectile fired at 70 degrees will have the same range as a projectile fired at 75 degrees angle.

Hence, the correct option is C.

This is a problem in projectile motion, which involves the motion of an object that is launched into the air and then moves under the influence of gravity. The range of a projectile is the horizontal distance it travels before hitting the ground, and it depends on the initial velocity and angle of launch.

In this problem, we are told that a projectile fired at an angle of 70 degrees has the same range as one fired at some other angle. We are asked to find that angle.

To solve this problem, we need to use the fact that the range of a projectile is given by the formula

R = \(vo^{2}\) * sin(2θ) / g

where R is the range, v0 is the initial velocity, θ is the launch angle, and g is the acceleration due to gravity.

We know that the range for the 70 degree angle is the same as the range for the unknown angle, so we can set up an equation

\(vo^{2}\) * sin(140) / g = \(vo^{2}\) * sin(2θ) / g

We can simplify this equation by canceling out the g terms and dividing both sides by  \(vo^{2}\)

sin(140) = sin(2θ)

Now we can use the inverse sine function to find θ

θ = \(sin^{-1}\)(sin(140) / 2)

θ ≈ 75 degrees.

Hence, the correct option is C.

The given question is incomplete and the complete question is '' A projectile fired at 70 degrees will have the same range as a projectile fired at ____ angle. A. 20 degrees B. 90 degrees C. 75 degrees D. 15 degrees ''.

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