Explain whether the acceleration of the moon is higher than,less or equal to that on the earth

Answer:

Explanation:

The horizontal velocity is 1.61.

Answer:

f = v/λ

Explanation:

f = v/λ  

f = frequency (Hz)

v =  speed  (m/s)

λ = wavelength  (m)

Because they used cutting-edge tools and technology to strengthen the signal and increase the range, the Swedish Space Agency was able to transmit a wifi signal over such a long area.

With a 2.4GHz frequency, Wi-Fi transmissions typically have a range of over 45 metres, or roughly 150 feet. You will have a reach of approximately 15 metres or 50 feet when using a 5Ghz frequency.

802.11g - Indoor effective ranges of 100–150 feet at 54 Mbps wireless throughput using a 2.4GHz transmission frequency. 802.11g and 802.11b can communicate at 11 Mbps.

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Answer:

Given:

m1 = 7 kg

V1 = 12 m/s

m2 = 25 kg

V2 = 6 m/s

To find:

Combined speed of two balls stick together after collision V = ?

Solution:

According to law of conservation of momentum,

m1V1 + m2V2 = (m1+m2)V

7×12 + 25×6 = (7+25)V

84 + 150 = 32V

V = 234/32

V = 7.31 m/s

Combined speed of two ball is 7.31 m/s

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Answer:

a. 50 m/s b. 0 m/s c. 50 m/s d. 4.04 s e. -39.6 m/s f. 63.78 m/s g. 202 m

Explanation:

a. What is the initial horizontal velocity?

Since the object is launched horizontally, it initial horizontal velocity is 50 m/s

b. What is the initial vertical velocity?

Since the object is launched horizontally, it has no initial vertical component. So, its initial vertical velocity is 0 m/s

c. What is the final horizontal velocity?

Its final horizontal velocity is 50 m/s since no force acts on it in the horizontal direction to change its value.

d. How much time did it take for the object to hit the ground?

We use the equation s = ut - 1/gt² since the object is falling under gravity where u = initial vertical velocity = 0 m/s, s = height of cliff = 80 m, g = acceleration due to gravity = -9.8 m/s² and t = time it takes the object to hit the ground.

s = ut - 1/2gt²

80 m = 0 × t - 1/2 × -9.8 m/s² × t²

80 m = 4.9 m/s² × t²

t² = 80 m ÷ 4.9 m/s²

t² = 16.33 s²

t = √(16.33 s²)

t = 4.04 s

e. What is the final vertical velocity?

Using v = u + at where u = initial vertical velocity = 0 m/s, v = final vertical velocity, a = acceleration = -g =  -9.8 m/s²and t = time it takes object to reach the ground = 4.04 s.

Substituting these values into the equation, we have

v = u + at

v = 0 m/s + (-9.8 m/s²) × 4.04 s

v = -39.6 m/s

f. What is the final resultant speed?

The final resultant speed v' is the resultant of the final horizontal velocity and the final vertical velocity. Let u' = final vertical velocity = 50 m/s.

v' = √(u'² + v²)

v' = √((50 m/s)² + (-39.6 m/s)²)

v' = √(2500 m²/s² + 1568.16 m²/s²)

v' = √(4068.16 m²/s²)

v' = 63.78 m/s

g. How far from the base of the cliff will the projectile land?

The distance from the base of the cliff, d where the projectile lands is

d = u't where u' = horizontal velocity = 50 m/s and t = time it takes object to land = 4.04 s

d = 50 m/s × 4.04 s

d = 202 m

Correct question is;

A ballet dancer spins with 2.4 rev/s with her arms outstretched,when the moment of inertia about axis of rotation is I. With her arms folded,the moment of inertia about the same axis becomes 0.6I about the same axis. Calculate the new rate of spin.

Answer:

4 rev/s

Explanation:

We are given;

Initial Angular velocity; ω_i = 2.4 rev/s

Initial moment of inertia; I_i = I

Final moment of inertia; I_f = 0.6I

From conservation of angular momentum, we have;

I_i × ω_i = I_f × ω_f

Where ω_f is the new rate of spin.

Thus, let's make it the subject to get;

ω_f = (I_i × ω_i/I_f)

Plugging in relevant values, we have;

ω_f = (I × 2.4/0.6I)

I will cancel out to give;

ω_f = 2.4/0.6

ω_f = 4 rev/s

Answer:

Below

Explanation:

Her POTENTIAL energy , mgh , is converted to KINETIC energy , 1/2 mv^2

mgh = 1/2 mv^2     You can divide through by 'm' to get:

gh = 1/2 v^2       solve for 'v'

v = sqrt (2gh)

   = sqrt ( 2 * 9.81 * 25.8) = 22.5 m/s

( NOTE that her mass, 64.6 kg , is irrelevant)

Answer:

Explanation:

Use Archimedes' principle, that states something of this nature: "The buoyant force acting on an object immersed in a fluid is equal to the weight of the fluid displaced"

Say, you take a cube of wood(for example) and place it in a bucket of water. Your cube is bound to sink, until, the upthrust force equals its weight.

Where does this upthrust come from?

As the cube sinks, it displaced some volume of water(if the bucket were full you would see water pouring out)

Archimedes simply stated that: Upthrust,

U=mg

Given,

The mass of the car, m=1850 kg

The speed of the car, v=10 m/s

The radius of the turn, r=4.5 m

The centripetal force is calculated using the formula,

On substituting the known values in the above equation,

Therefore the centripetal force on the car while making the turn is 41111.1 N

It would take approximately 546 days for the decay rate of the sample of this radioactive isotope to fall to 0.58 of its initial rate.

1. The decay rate of a radioactive isotope is proportional to the number of radioactive atoms present in the sample at any given time.

2. The decay rate can be expressed as a function of time using the formula: R(t) = R₀ * \(e^{(-\lambda t\)), where R(t) is the decay rate at time t, R₀ is the initial decay rate, λ is the decay constant, and e is the base of the natural logarithm.

3. The half-life of a radioactive isotope is the time it takes for half of the radioactive atoms in a sample to decay. In this case, the half-life is given as 210 days.

4. Using the half-life, we can find the decay constant (λ) using the formula: λ = ln(2) / T₁/₂, where ln(2) is the natural logarithm of 2 and T₁/₂ is the half-life.

5. Substituting the given half-life into the formula, we have: λ = ln(2) / 210.

6. Now, we need to find the time it takes for the decay rate to fall to 0.58 of its initial rate. Let's call this time "t".

7. Using the formula for the decay rate, we can write: 0.58 * R₀ = R₀ * e^(-λt).

8. Simplifying the equation, we get: 0.58 = \(e^{(-\lambda t\)).

9. Taking the natural logarithm of both sides, we have: ln(0.58) = -λt.

10. Substituting the value of λ from step 5, we get: ln(0.58) = -(ln(2) / 210) * t.

11. Solving for t, we have: t = (ln(0.58) * 210) / ln(2).

12. Evaluating the expression, we find: t ≈ 546.

13. Therefore, it would take approximately 546 days for the decay rate of the sample of this radioactive isotope to fall to 0.58 of its initial rate.

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The correct statement is Molecular collisions transfer thermal energy between the system and its surroundings. Thus, option D is correct.

The energy moves between a system of reacting substances and the surroundings by the collision of molecules. The transfer of heat or thermal energy between the system and its surroundings by the process of Conduction. Conduction is the process of transmitting the heat to the neighboring atoms or collisions by the process of collisions.

The conduction takes place more steadily in solids and liquids where the molecules are closer together. When the molecules are collided with the nearby molecules, the potential energy is converted into kinetic energy and hence the heat energy is transferred between the system and its surroundings.

Hence, Molecular collisions transfer thermal energy between the system and its surroundings. Thus, the correct option is D.

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To calculate acceleration, you use the equation a =Δv/Δt, where Δv is the change in velocity, and Δt is the time it takes for the change to occur.

In physics, acceleration is the change in velocity in a given unit of time. The acceleration of an object is caused by a force acting on the object, as explained in Newton's second law. The SI unit for acceleration is meters per second squared (m/s). Acceleration is the product of the velocity (m/s) divided by the time (s). So, the resulting formula is a = v/t.

Acceleration and the most basic velocity in acceleration are how fast a car can increase its speed, while velocity looks at how fast a car travels a certain distance.

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Answer:

Diffusion in gases is quick because the particles in a gas move quickly. It happens even faster in hot gases because the particles of gas move faster.

The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

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Answer:

The magnitude of the rate of change of the flux through the coil is 2.82 x 10⁻³ T.m²/s

Explanation:

Given;

radius of coil, r = 8 cm = 0.08 m

number of turns of the coil, N = 110 turns

the induced emf through the coil, E = -310mV

The induced emf through the coil is given by;

\(E = - N\frac{d \phi}{dt} \\\\\frac{d \phi}{dt} = \frac{E}{-N}\)

Where;

dФ/dt is the magnitude of the rate of change of the flux through the coil

\(\frac{d\phi}{dt} = \frac{-0.31}{110} \\\\\frac{d\phi}{dt} =2.82*10^{-3} \ T.m^2/s\)

Therefore, the magnitude of the rate of change of the flux through the coil is 2.82 x 10⁻³ T.m²/s

Using the equation provided, we can predict that the acceleration for the glider will be zero when the velocity is at a maximum. This typically occurs at the equilibrium position, which is the midpoint of the oscillating mass on a spring. We can advance the video to this time and observe the location of the glider to confirm this prediction.

Similarly, we can predict that the acceleration of the glider will be a maximum when the velocity is zero. This typically occurs at the endpoints of the oscillation, where the glider changes direction. We can advance the video to these times and note the positions of the glider to confirm this prediction.

The acceleration is zero when the glider is at the equilibrium position because the net force acting on the glider is zero at this point. This means that the glider is not experiencing any acceleration and will continue to move at a constant velocity.

The acceleration of the glider is a maximum at the endpoints of the oscillation because the net force acting on the glider is at a maximum at these points. This means that the glider is experiencing the greatest acceleration and will change direction at these points.

Overall, the acceleration of the glider is determined by the net force acting on it, which is related to its position relative to the equilibrium position. By observing the glider's position and velocity, we can predict when the acceleration will be zero or at a maximum.

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The scientific study of physics focuses on the underlying concepts that underpin the laws of nature. It investigates how matter, energy, space, and time behave and interact. Physics' fundamental goal is to comprehend the underlying laws and forces that create our universe.

Physics has developed theories and rules to explain a wide variety of events, from the motion of celestial bodies to the behaviour of subatomic particles, via meticulous observation, investigation, and mathematical analysis.

These theories offer a framework for comprehending and forecasting the behaviour of physical systems, such as Newton's laws of motion and Einstein's theory of relativity.

From the tiniest particles to the biggest cosmic structures, physics has enhanced our understanding of the world and sparked a host of technological advances.

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Answer:

Explanation:

Boy b will win and cabinate will move in his direction

15 is maybe the net force

A force is a vector quantity, and the net force on an object is the vector sum of all the forces acting on the object

The net force on the cabinet is 5 Newtons in the direction boy A is pulling

The reason the net force value is correct is given as follows

The known parameter are;

Required:

The net force on the cabinet

Solution:

Let the vector form of the force applied by boy A, \(\overset \rightarrow {F_1}\) = 10·i, therefore, the force applied by boy B in the opposite direction is, \(\overset \rightarrow {F_2}\) = -5·i

The net force on the cabinet,  \(F_{NET}\) = \(\overset \rightarrow {F_1}\) + \(\overset \rightarrow {F_2}\), therefore;

\(F_{NET}\) = 10·i - 5·i = 5·i

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Answer:

D

Explanation:

I believe its D because A wouldn't really make sense, having to see the cake doesn't have anything to do with it changing so its not B, and C doesn't make sense because the time frame doesn't matter, D makes sense because it has to do with heat energy

The last step in the direction is to put the cake batter in the oven because the heat energy from the oven causes the batter to change into the cake.

A temperature difference causes energy to flow through one body to another, known as heat. Energy is transferred, or heat flows, when two bodies of differing temperatures are brought together. The hotter body goes to the cooler.

Typically, but not always, this energy transfer causes the temperature of a colder body to rise and the heat of the region of high temperature to fall.

Shifting from one physiological body (or phase) to another, such as melting from a solid to a liquid, sublimation from a solid to a vapor, boiling from a liquid to a vapor, or changing from one solid form to another, allows a substance to absorb heat without increasing in temperature.

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Answer:

with what? I can help but with what

Answer:

2

Explanation:

Answer:

Explanation:using

Mgh= 1/2mv²+1/2Iw²

So for disk

mgh= 1/2mv²+1/2(1/2mR²)v²/R²

gh = 0.75v²

V= 4.8m/s

Then the translational KE

= (1/2mv²)/mgh x 100

= 66.7%

So rotational energy= 100- 67.7%

=33.3%

For hoop

mgh= 1/2mv²+1/2(1/2mR²)v²/R²

V= 4.14m/s

Then the translational KE

= (1/2mv²)/mgh x 100

= 50%

Then the remaining 50% is translational energy

"A Night at the Museum" is a story about a guard at the Museum of Natural History named Larry Daley who discovers that the museum exhibits come to life after hours due to a curse. Through Larry's experiences in the museum, the story illustrates a few specific progressions:First, the story highlights Larry's personal growth.

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Answer:

Static friction

Explanation:

Answer:

Static friction

Explanation:

The energy for a photon is given by the equation:

In this case the energy is 3.32e-19 J; plugging this value and solving for the wavelength we have:

Therefore, the wavelength is:

Given:

The work done by the engine is: W = 635 J

The work is done over the time of: t = 45 s

To find:

The power generated.

Explanation:

Power is defined as the rate of doing work. It is the amount of energy consumed over time t.

Let P be the power, W be the work done by the engine over time t, then

Substitute the values in the above equation, we get:

Final answer:

The power generated by the engine is 14.11 watts.

The work done on 85 N boxes of books while carried horizontally 4m across a room is equal to zero. Therefore, option (C) is correct.

Work can be demonstrated as the energy used when a force is exerted to move an object through a definite displacement. The work done defines both the exerted force on the object and the distance moved by the object.

The applied force moves an object in a straight line in the direction of the exerted force over a displacement 'd'.

W= F × d

Where 'F' is the exerted force and 'd' is the displacement and W is work done.

Given, the weight of the box = 80 N

The displacement , d = 4 m

In order for to work to be done the box should move in the direction of exerted force as the books are moving forward direction and the applied force in an upward direction to carry the box.

Therefore, the distance moved in the direction of force is zero so the work done is also equal to zero.

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The wavelength of the sound wave with a frequency of 415.3 Hz is approximately 3.565 m.

The speed of sound in water is approximately 1482 m/s. Use the formula v = f × λ, where v = velocity (speed of sound), f = frequency, and λ = wavelength.

Given:

Frequency of the first sound wave (f₁) = 257.2 Hz

Wavelength of the first sound wave (λ₁) = 3.25 m

Velocity of sound in water (v) = 1482 m/s

Rearrange the formula to solve for λ₂ (wavelength of the second sound wave):

v = f × λ

λ = v / f

Substituting the values:

λ₂ = v / f₂

= 1482 m/s / 415.3 Hz

Calculating:

λ₂ ≈ 3.565 m

Therefore, the wavelength of the sound wave with a frequency of 415.3 Hz is approximately 3.565 m.

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Radio waves are safe for diagnosing illnesses through magnetic resonance imaging due to their low energy.

Radio waves are useful for space research due to their long wavelengths.

Radio waves are waves which form a portion of the electromagnetic spectrum  that occur at lower frequencies than microwaves.

The frequencies of radio waves are as low as 3 Hz and as high as 1 gigahertz.

The wavelengths of radio waves occur within the range of thousands of meters to 30 cm.

The property radio waves that makes them safe for diagnosing illnesses through magnetic resonance imaging is their low energy as they are not ionizing.

The property that makes radio waves useful for space research is their long wavelengths which extends to thousands of meters.

In conclusion, radio waves are safe for magnetic resonance imaging and are applied in space research.

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Answer:

Which property best makes radio waves safe for diagnosing illnesses through magnetic resonance imaging?

✔ low energy of radio waves

Which property best makes radio waves useful for space research?

✔ long wavelengths of radio waves