The Rock drops from a cliff for 5 seconds. It has an initial velocity of Om/s. It has a final velocity of 50m/s.

Answer:

the motion of an object at a constant speed along a circular path is known as Uniform circular motion

The plane travels a distance of 325 miles if the airplane travels for 2.5 hours at an average speed of 130 miles per hour. Using the distance formula (d = rt), we can calculate the distance.

To find the distance traveled by the airplane, we can use the distance formula, which is represented as d = rt. In this formula, "d" represents the distance, "r" represents the rate or speed at which the object is traveling, and "t" represents the time taken for the travel.

Given that the airplane travels for 2.5 hours at an average rate of 130 miles per hour, we can substitute these values into the formula. The rate of the airplane is 130 miles per hour, and the time taken is 2.5 hours.

Using the formula, we can calculate the distance traveled as follows:

d = rt

d = 130 mph × 2.5 hours

Multiplying the rate (130 mph) by the time (2.5 hours) gives us:

d = 325 miles

Therefore, the airplane travels a distance of 325 miles during the 2.5 hours of travel at an average rate of 130 miles per hour.

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In order to determine the number of particles of methane, use the following expression:

number of particles = (mass /molar mass ) x Avogadro's number

in this case, you have:

molar mass = 16.03 grams/mole

mass = 120 grams

Avogadro's number = 6.02*10²³ particles/mol

replace the previos values of the parameters into the formula for the number of particles:

number of particles=(120 grams/ 16.03 grams/ mol)x(6.02*10²³particles/mol)

= (7.46 mol) x (6.02*10²³ particles/mol)

= 4.50*10²⁴ particles

Hence, the number of particles of methane, in 120 grams, is 4.50*10²⁴

The electric bill for the household for the month of June is ₹ 504.72

We'll begin by obtaining the energy consumed. This is shown below:

For fridge:

Energy = power × time

Energy for fridge = 400 × 10

Energy for fridge = 4000 Wh

Divide by 1000 to express in KWh

Energy for fridge = 4000 / 1000

Energy for fridge = 4 kWh

For fan:

Energy = power × time

Energy for fan = 80 × 6

Energy for fan = 480 Wh

Divide by 1000 to express in KWh

Energy for fan = 480 / 1000

Energy for fan = 0.48 kWh

Energy for 2 fans = 2 × 0.48 = 0.96 kWh

For tube:

Energy = power × time

Energy for tube = 18 × 6

Energy for tube = 108 Wh

Divide by 1000 to express in KWh

Energy for tube = 108 / 1000

Energy for tube = 0.108 kWh

Energy for 6 tubes = 6 × 0.108 = 0.648 kWh

Total energy consumed per day = 4 + 0.96 + 0.648 = 5.608 kWh

Total energy consumed per month = 30 × 5.608 = 168.24 kWh

Finally, we shall determine the electric bill for the month of june. Details below:

Electric bill = energy × Cost per KWh

Electric bill for June= 168.24 × 3

Electric bill for June = ₹ 504.72

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The flux through any closed surface surrounding a cylinder with height H and radius R having surface charge density σ = k sin φ, where k is a constant, is φ₀=2πRLk sin φ/ε₀.

Since the cylinder's surface charge density is given by σ = k sin φ

Therefore, the total charge on the cylinder's curved surface

Q = σ(2πRL)

Where L is the height of the cylinder, Q = 2πRLk sin φ .

From Gauss's Law, the total flux through a closed surface surrounding a cylinder with height H and radius R is given by φ₀=Qε₀ .Here, ε₀ represents the vacuum permittivity. Now, substituting the value of Q, we get

φ₀ = (2πRLk sin φ)/ε₀

Therefore, the flux through any closed surface surrounding a cylinder with height H and radius R having surface charge density σ = k sin φ, where k is a constant, is φ₀=2πRLk sin φ/ε₀.

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Answer:

\(15\%\).

Explanation:

The efficiency of a machine is the percentage of energy input that was turned into useful energy.

The power rating of this lamp is \(40\; \rm W\) (same as \(40\; \rm J \cdot s^{-1}\),) meaning that \(40\; \rm J\) of energy is supplied to this lamp every second.

The question states that \(34\; \rm J\) out of that \(40\; \rm J\) of energy input would be turned into heat, which is not useful energy output in this scenario. Assuming that all other forms of energy loss is negligible. The rest of the \((40\; \rm J - 34\; \rm J) = 6\; \rm J\) of energy supplied to this lamp would be turned into useful energy output.

Thus, every second, this lamp would receive \(40\; \rm J\) of energy input and would outputs \(6\; \rm J\) of useful work. The efficiency of this lamp would be:

\(\begin{aligned}& \text{Efficiency} \\ =\; & \frac{\text{Useful energy out}}{\text{Total energy in}} \times 100\% \\ =\; & \frac{6\; \rm J}{40\; \rm J} \times 100\%\\ =\; &15\% \end{aligned}\).

Answer:

Steam distillation is a separation process which consists in distilling water together with other volatile and non-volatile components.

Answer:

Explanation:

If angle of incidence and angle of refraction be i   and r respectively ,

sini / sinr = μ ( refractive index )

sin r = sin i / μ

If angle of incidence i be constant and medium becomes denser that means μ becomes higher in value , the value of sin r will be low ( because of increase in value of denominator )

As sin r decreases , r also decreases also.

Hence when medium becomes denser , angle of refraction becomes less .

Answer:

C3N6 is also known as propene(Meythlethylene)

Explanation:

Propene has 3 Carbon molecules and 6 nitrogen molecules. This makes the new substance a non-metal.

Work is done on the mouse by air resistance 25.574 Joule.

Work is done every time a force moves something over a displacement. you can calculate the electricity transferred, or paintings done, by using multiplying the force via the gap moved in the course of the force. strength transferred = work achieved = pressure x distance moved within the direction of the pressure.

Work to be accomplished, a force must be exerted and there must be motion or displacement in the route of the pressure. The work done by way of a force appearing on an object is the same as the significance of the pressure accelerated by way of the space moved within the route of the force.

given,

mass = 27.0 g = 0.027 kg

Height H = 200 m

initial speed u = 0 m/s

final speed V = 8.1 m/s

force = mg

        = 0.027 × 9.8

         = 0.2646 N

1/2mu² + mgh = mgh + 1/2mv²

0 + 0.027×9.8 ×100 = 0 + 1/2×0.027× (8.1)² + air reesistance

initial energy = 26.46 J

final energy = 0.886 J

air resistance = 26.46 J - 0.886 J

                        = 25.574 Joule

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Answer:

cannibalism

Explanation:

because she is eating her body!

Answer:

Cold temps. . .

Explanation:

Hope it helps!

To determine the size of the conductor required to feed a 16 ampere load with a 20-ampere overcurrent protection device, we need to use the National Electric Code (NEC) ampacity tables.

For conductors in an ambient temperature of 100°F, we need to use the 90°C column of the tables. Based on NEC Table 310.16, a 14 AWG copper conductor can handle up to 20 amperes at 90°C. Therefore, a 14 AWG copper conductor would be sufficient to feed the 16 ampere load and protect the circuit with a 20-ampere overcurrent protection device.

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Full Question: What size conductor is required to feed a 16 ampere load when the conductors are in an ambient temperature of 100F? The circuit is protected with a 20-ampere overcurrent protection device.

Answer:

V = 268.8 m/s

Explanation:

The speed of a wave in general is given by the following formula:

V = fλ

where,

V = Speed of that wave

f = Frequency of the wave

λ = wavelength of the wave

In this case we have a sound wave, travelling across carbon dioxide. The properties of sound wave are as follows:

V = Speed of Sound in Carbon dioxide = ?

f = frequency of sound wave = 140 Hz

λ = wavelength of sound wave = 1.92 m

Therefore,

V = (140 Hz)(1.92 m)

V = 268.8 m/s

Answer: 1500 Joules

Explanation: To calculate the work done by the weight lifter, we can use the formula:

Work = Force x Distance x cos(theta)

where "Force" is the force applied by the weight lifter, "Distance" is the vertical distance that the weight is lifted, and "theta" is the angle between the direction of the force and the direction of the displacement.

In this case, the force applied by the weight lifter is 1000N and the vertical distance lifted is 1.5m. Since the force is applied vertically upwards and the displacement is also vertical, the angle between the direction of the force and the direction of the displacement is 0 degrees (cos(0) = 1).

Therefore, the work done by the weight lifter is:

Work = 1000N x 1.5m x cos(0) = 1500 Joules

So the work done by the weight lifter on the weights is 1500 Joules.

Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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Overall, star clusters provide a unique opportunity to study the properties and evolution of stars in a controlled and relatively simple environment, which can help us better understand the processes that govern the life cycles of stars.

Star clusters are almost ideal "laboratories" for stellar studies for several reasons:

Stellar populations: Star clusters are made up of stars that formed around the same time and from the same cloud of gas and dust. This means that the stars in a cluster have similar ages and compositions, which makes it easier to study their properties and evolution.

Distance: Star clusters are relatively close to Earth, which makes them easier to observe and study in detail. This is because the stars in a cluster are all at roughly the same distance from us, which eliminates distance-related uncertainties and allows us to accurately measure their properties.

Large numbers: Star clusters contain a large number of stars packed into a relatively small region of space. This means that we can observe and study many stars at once, which allows us to gather statistical data on the properties of stars and their evolution.

Interactions: Star clusters are dynamic environments, and the gravitational interactions between stars can affect their evolution. Studying star clusters allows us to observe and understand the effects of interactions between stars, such as binary star systems, stellar collisions, and gravitational interactions between stars.

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Answer:

1.) A

2.) B

4.) A

17.) B

Explanation:

Im sure tama ako nasagot kona

to ehh

The telescope that is the best option if visible radiation is blocked is b. infrared telescope

If visible light is obscured, an infrared telescope is generally used. Since infrared radiation has longer wavelengths than visible light, infrared telescopes are made to detect and study this type of electromagnetic energy. They may also view various celestial things and phenomena that mostly emit infrared light thanks to this.

While radio telescopes are employed to determine and study radio waves, X-ray telescopes are used to watch X-rays, and UV telescopes are utilized to observe ultraviolet light. None of these alternatives is intended to deal with the situation where visible radiation is blocked. However, in these circumstances, infrared telescopes can still deliver useful observations.

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Complete Question:

Which of the following telescope is the best option if visible radiation is blocked?

a. ultraviolet telescope

b. lnfrared telescope

c. radio telescope

d. ray telescope

The maximum constant speed at which the pilot can travel around the vertical curve with a radius of curvature of

p = 800 m so that he experiences a maximum acceleration of

an = 8g = 78.5 m/s2 is 89.4 m/s.

Given data:

Radius of curvature p = 800 m

Maximum acceleration an = 8g = 78.5 m/s²

Mass of the pilot m = 70 kg

Maximum speed v for the plane is given as follows:

an = (v²) / pm

g = (v²) / p78.5 m/s²

= (v²) / (800 m)

where v is the velocity and an is the maximum acceleration Let's solve the above equation for v to determine the maximum constant speed:

v² = 78.5 m/s² × 800

mv² = 62800

v = √62800

v = 250.96 m/s

The pilot can travel at a maximum speed of 250.96 m/s

to experience a maximum acceleration of 8g if we consider the theory of relativistic mass increasing with speed.

So we need to lower the speed to achieve 8g.

For a safe speed, let's take 80% of the maximum speed; 80% of 250.96 m/s = 200.768 m/s

Therefore, the maximum constant speed that the pilot can travel around the vertical curve having a radius of curvature p = 800 m,

so that he experiences a maximum acceleration an = 8g = 78.5 m/s2, is 200.768 m/s.

When the plane is traveling at this speed and is at its lowest point, the normal force he exerts on the seat of the airplane is;

N = m(g + an)

Here, m = 70 kg, g = 9.81 m/s²,

and an = 78.5 m/s²

N = (70 kg)(9.81 m/s² + 78.5 m/s²)

N = 5662.7 N (approx)

Therefore, the normal force the pilot exerts on the seat of the airplane when the plane is traveling at the maximum constant speed and is at its lowest point is 5662.7 N.

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The work that has been done by the Korbel is  4.41kJ.

We have to note that we define work in physics as the product of the force and the distance. In the case of the chair in the question, we have been told that Korbel pushes a 15 kg chair for a distance of 30 meters.

The force in this case would be the weight of the chair that we have and we can write that;

W = mgh

m = mass

g = acceleration due to gravity

h = height

Thus

W = 15 * 9.8 * 30

W = 4.41kJ

Thus a work of about  4.41kJ is done.

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The fly has an average velocity of

v[ave] = ∆x/∆t = (-5.80 m) / (4.22 s) ≈ -1.37 m/s

If its acceleration is constant, then its average velocity is also equal to the average of its initial and final velocities,

v[ave] = (v[initial] + v[final]) / 2

which tells us that

v[initial] ≈ -1.37 m/s - 1/2 v[final]

The fly's final velocity after some time t is given by

v[final] = v[initial] + (-1.33 m/s²) t

so that after 4.22 s, we have

v[final] ≈ v[initial] - 5.61 m/s

Substitute this into the equation for v[initial] :

v[initial] ≈ -1.37 m/s - 1/2 (v[initial] - 5.61 m/s)

Solve for v[initial] :

3/2 v[initial] ≈ -1.37 m/s + 1/2 (5.61 m/s)

⇒   v[initial] ≈ 0.955 m/s

Answer:

Grandma will arive \(\frac{1}{2}\)hr later

Explanation:

\(s=20\\d=210 mi|\\ s=70 mi|h \\ \\ \frac{60}{1} =\frac{210}{+} = 3.5 hrs\)

Neither the object's speed nor direction can change

Answer:

D. The object's speed, direction, or both can change.

Explanation:

If Adam applies an unbalanced force to an object, the object's speed, direction, or both can change. This is because an unbalanced force causes an acceleration, which can result in changes in both speed and direction.

Let's consider some examples to better understand this concept. Imagine Adam pushes a book on a table with a greater force in one direction. If the force is greater than the friction between the book and the table, the book will start moving in the direction of the force. This change in direction is caused by the unbalanced force applied by Adam.

Now, let's say Adam applies a constant force to a ball on the ground. If the force is greater than the friction between the ball and the ground, the ball will start rolling and its speed will increase. Again, this change in speed is due to the unbalanced force applied by Adam.

In summary, when an unbalanced force is applied to an object, it can cause changes in the object's speed, direction, or both. So, the correct answer is D: The object's speed, direction, or both can change.

If a 6.4 × 10^4 kg airliner with a kinetic energy of 1.1 × 10^9J, then the speed of the airliner is  131.17 meters per second.

To calculate the speed of an airliner with a given kinetic energy, we can use the formula for kinetic energy:

Kinetic energy (KE) = (1/2) * mass * velocity^2

Given:

Mass of the airliner (m) = 6.4 × 10^4 kg

Kinetic energy (KE) = 1.1 × 10^9 J

We can rearrange the formula to solve for velocity (v):

KE = (1/2) * m * v^2

Multiply both sides of the equation by 2:

2 * KE = m * v^2

Divide both sides of the equation by m:

(2 * KE) / m = v^2

Take the square root of both sides to solve for v:

v = √((2 * KE) / m)

Substituting the given values into the equation:

v = √((2 * (1.1 × 10^9 J)) / (6.4 × 10^4 kg))

Calculating the expression:

v ≈ √(1.71875 × 10^4 m^2/s^2)

v ≈ 131.17 m/s

Therefore, the speed of the airliner is approximately 131.17 meters per second.

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Answer:

K.E = 1.13 × 10^5 J

When compared to;

K.E = a.bc X 10^d J

We can observe that;

a = 1

b = 1

c = 3

d = 5

Explanation:

Given;

Mass of rhinoceros m = 1000kg

Velocity v = 15m/s

The kinetic energy of the body at this speed is;

K.E = 0.5×mv^2 ........1

Substituting the values of m and v into equation 1;

K.E = 0.5×1000×15^2

K.E = 112500 J

K.E = 1.13 × 10^5 J

When compared to;

K.E = a.bc X 10^d J

We can observe that;

a = 1

b = 1

c = 3

d = 5

The critical angle of the transparent material is 35.3 degrees.

The critical angle is the angle of incidence at which the angle of refraction is 90 degrees. In this case, the angle of refraction is 32 degrees. Therefore, the critical angle is calculated as follows:

sin(critical angle) = sin(90 degrees) / sin(angle of refraction)

sin(critical angle) = 1 / sin(32 degrees)

sin(critical angle) = 0.574

critical angle = arcsin(0.574)

critical angle = 35.3 degrees

Therefore, the critical angle of the transparent material is 35.3 degrees.

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The correct sentence would be: "After finishing dinner, Kim cleared the table, and Mark washed the dishes."

The original sentence contains a misplaced modifier. To correct this, the sentence should be rewritten to indicate who performed each action.

This above version correctly indicates that Kim cleared the table and Mark washed the dishes. The original sentence suggests that the table cleared itself, which is a grammatical error. Additionally, the sentence should use past tense to indicate that the actions have already occurred.

By using "was cleared" and "washed," the original sentence is using a combination of past and present tense, which is also a grammatical error.

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Answer: Neap tides

Explanation: Neap tides are tides that have the smallest tidal range, and they occur when the Earth the Moon, and the Sun form a 90o angle. They occur exactly halfway between the spring tides when the Moon is at first or last quarter.