We always see the same side of the Moon because a. the Moon does not rotate on its axis. b. the Moon rotates on its axis once for each revolution around Earth. c. when t…
We always see the same side of the Moon because
a. the Moon does not rotate on its axis.
b. the Moon rotates on its axis once for each revolution around Earth.
c. when the other side of the Moon is facing Earth, it is unlit.
d. when the other side of the Moon is facing Earth, it is on the opposite side of Earth.
e. none of the above

A. The water will shoot out of the hole at a speed of 7.5 x 10⁻² m/s. B. The water will shoot out of the hole at a speed of 8.3895 m/s when the diameter of the hole is three times as large.

Part A: The volume of water entering the fountain per second is 7.5 x 10-2 m3. The diameter of the hole is 4.55 cm. The area of the hole is given by;

A=πr²

Where; r = d/2

Substituting the values of diameter and π into the equation, we get;

A = π x (4.55/2)²

A = π x 2.275²

A = 16.26 cm²

We convert the area to meters² so as to make the units of volume the same.

V= A x V_1

V= 16.26 cm² x (7.5 x 10⁻² m³/s) x (10⁻⁴ m²/cm²)V = 1.2195 x 10⁻⁴ m³/s

To find how fast the water will shoot out of the hole, we use the continuity equation;

A₁V₁ = A₂V₂

Where; A₁ and V₁ are the area and velocity of the water entering the hole respectively. A₂ and V₂ are the area and velocity of the water exiting the hole respectively.

Since water is incompressible, the volume of water entering is the same as that exiting.

A₁V₁ = A₂V₂

V₂ = A₁V₁/A₂

Where; A₁ = πr₁² = π(4.55/2)² = 16.26 cm²

V₁ = 7.5 x 10⁻² m³/s

A₂ = πr₂² = π(4.55/2)² = 16.26 cm² (assuming the hole is circular)

V₂ = (16.26 cm² x 7.5 x 10⁻² m³/s)/(16.26 cm²)

V₂ = 7.5 x 10⁻² m/s

Therefore, the speed is 7.5 x 10⁻² m/s.

Part B: If the diameter of the hole is three times as large, then the radius of the hole will also be three times as large. That is;

r₂ = 3r₁ = 3(4.55/2) cm = 6.825 cm

The area of the hole is given by;

A₂ = πr₂²

A₂ = π(6.825/100)² m²

A₂ = 1.464 x 10⁻⁴ m²

Substituting the values into the continuity equation;

V₂ = A₁V₁/A₂

V₂ = (16.26 cm² x 7.5 x 10⁻² m³/s)/(1.464 x 10⁻⁴ m²)

V₂ = 8.3895 m/s

Therefore, the speed is 8.3895 m/s when the diameter of the hole is three times as large.

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Answer:

Yes

Explanation:

they make sound due to the fact that the vibration from the tuning fork itself interacts with the air around it. it's also worth mentioning that anything that vibrates creates sound waves as well.

Answer:

I know that F=Gm1m2/r^2 or F=GMn/r^2 and G is like the universal gravitational constant so I hope this helps

The equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.

The rate of flow of charge per unit cross - sectional area is called electric current. Mathematically -

i = dq/dt

From this -

dq = i dt

∫dq = ∫i dt

Q = it

Current is measured in amperes and is a Tensor quantity.

Given is a circuit that measured a current of 11.5 milli amperes.

Now, the current in milli amperes is used to give the measurement of small amount of current. One milliampere of current is equivalent to -

1 mA = (1/1000) A = 10 ⁻³ A

So, in order to calculate the total current in amperes, we will multiply 11.5 milliamperes by 10 ⁻³ as follows -

11.5 milliamperes [mA] = 11.5 x 10⁻³ amperes[A]

Therefore, the equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.

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The complete question with the scale is missing, so i have attached it.

Answer:

930 g

Explanation:

The block surface is frictionless, therefore, the only force that can possibly be applied to the block from the hamster will be the normal force.

Now, the force of gravity on the hamster acts downward and equals mg. Hence, The normal component will be;

F_n = mgcosθ.

Now, if we Assume that the scale does not respond to horizontal force component, the downward component of the normal force will be expressed as;

F_d = F_n(cosθ)

The scale measures the downward component.

Earlier, we saw that; F_n = mgcosθ

Thus; F_d = mgcosθ × cosθ

F_d = mg(cos²θ)

Now, when the friction was high, the measurement of the scale was;

(m+ M)g

Where ;

m = mass of hamster

M = mass of block

Therefore, when the friction is removed the scale measurement is;

mgcos²θ + Mg or (mcos²θ + M)g

But this is in units of Newton's.

Thus;

Measurement in kg is;

(mcos²θ + M)

We are given;

m = 170 g = 0.17 kg

M = 830 g = 0.83 kg

From the attached scale image,

θ = 40°

Thus;

Measurement = (mcos²θ + M) = ((0.17 cos²40) + 0.83) = 0.93 kg or 930g

Answer:

Option A. Decrease the charge of one Particles.

Option B. Increase the distance between the particles.

Explanation:

The electric force between two charged particles is related by the following equation:

F = Kq₁q₂ / r²

F is the force.

K is the electrical constant

q₁ and q₂ are the charges of the particles

r is the distance apart.

From the above formula, we can say that the force (F) is directly proportional to the product of the two charges and inversely proportional to their distance apart. This implies that as the charge of the particle increase, the force will also increase and as the charge of the particle disease, the force will also decrease.

On the other hand, if their distance apart is increased, the force will decrease and if their distance apart is decreased, the force will increase.

Note: if one of the charge disease, the force will also decrease and if one of charge increase, the force will also increase.

Centripetal acceleration: a= (2.844 m/s)²/0.35 m = 20.199 m/s² Speed of mass: v= 2.844 m/s Radius of circular path: r= 0.35 m.

The magnitude of the centripetal acceleration can be calculated using the formula a = (v²)/r, where v is the velocity of the mass and r is the radius of the circular path. In this case, the mass has a mass of 0.37 kg, the length of the pendulum is 0.70 m, the angle is 13°, and the radius is 0.35 m. Therefore, the centripetal acceleration is (2.844 m/s)2/0.35 m = 20.199 m/s². The speed of the mass is 2.844 m/s.

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Answer:

The larger the number of charges flowing through the wire,the larger is the current flowing in the wire.

Explanation:

if the wire is large then large amount of current flows through the circuit.but if the wire is small then a smaller amount of current will pass through.

I hope this helps

The statement "Kavg > Uavg" is generally true for a simple harmonic oscillator. This is because the total energy of the system, which is the sum of the kinetic and potential energies.

During the oscillation of a simple harmonic oscillator, the kinetic energy is zero at the extreme points of the motion, where the displacement is maximum, and the potential energy is at its maximum. Conversely, the kinetic energy is at its maximum when the displacement is zero and the potential energy is minimum. Therefore, the average kinetic energy over a cycle is greater than the average potential energy over the same cycle.

It is important to note that the statement "Kavg > Uavg" applies only to a simple harmonic oscillator, and may not be true for other types of oscillators or systems. Additionally, this statement assumes that the zero of potential energy is chosen at zero displacement, which is a common convention but not always the case.

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Answer:

x = 15√3m , y = 3.75m

Explanation:

According to the question ,

And we need to find out ,

As we know that , at any time t , the horizontal displacement (x) is given by ,

\(\longrightarrow\) x = u cos\(\theta\)t

\(\longrightarrow\) x = 20 * cos30° * 1.5 m

\(\longrightarrow\)x = 20 * √3/2 * 3/2 m

\(\longrightarrow\) x = 15√3 m .

\(\rule{200}2\)

For finding the vertical distance , let's find range first .

\(\longrightarrow\) R = u²sin2\(\theta\)/g

\(\longrightarrow\) R = (20)² * sin60° / 10 m

\(\longrightarrow\)R = 400 * √3/10 *2

\(\longrightarrow\)R = 20√3 m

Now we can find the vertical displacement as ,

\(\longrightarrow\) y = xtan\(\theta\) ( 1 - x/R)

\(\longrightarrow\)y = 15√3 *1/√3 ( 1-15√3/20√3)m

\(\longrightarrow\)y = 15( 1 - 3/4)m

\(\longrightarrow\)y = 15 * 1/4m

\(\longrightarrow\) y = 3.75 m

Answer:

Multiply the length, width and height of the brick to calculate its volume.

Explanation:

To find the volume of a rectangular brick, you need to multiply its length, width, and height.

The rectangular brick is 400 cubic centimeters (cm³).

The formula to calculate the volume of a rectangular prism (which includes a rectangular brick) is:

\(\[ \text{Volume} = \text{Length} \times \text{Width} \times \text{Height} \]\)

Let's assume the length of the rectangular brick is 10 cm, the width is 5 cm, and the height is 8 cm. Plugging these values into the formula, we get:

\(\[ \text{Volume} = 10 \, \text{cm} \times 5 \, \text{cm} \times 8 \, \text{cm} \]\)

Now we can calculate the volume:

\(\[ \text{Volume} = 400 \, \text{cm}^3 \]\)

Therefore, the volume of the rectangular brick is 400 cubic centimeters (cm³).

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VPNs commonly use protocols such as OpenVPN, IPsec, L2TP/IPsec, and SSTP. Each protocol has its strengths and weaknesses. For example, OpenVPN is known for its strong security and flexibility, while IPsec offers a high level of encryption and is often used for site-to-site VPNs.

Reasons why someone might choose not to update VPN protocols include compatibility issues with older devices or software, potential disruptions in service during the update process, or concerns about introducing new vulnerabilities or bugs with the updated protocol.

However, it's generally recommended to keep VPN protocols up to date to ensure the highest level of security and compatibility with evolving network environments.

Information about VPN protocols and reasons for updating or not updating them:

1. OpenVPN: It is an open-source protocol that is highly configurable and supports various encryption algorithms. It is known for its strong security and is widely supported across different platforms. Updating OpenVPN ensures that you have the latest security enhancements and bug fixes.

2. IPsec (Internet Protocol Security): IPsec provides a suite of protocols for securing IP communications. It offers strong encryption and authentication mechanisms. While IPsec is commonly used for site-to-site VPNs, it may require additional configuration for remote access VPNs. Updating IPsec ensures that any vulnerabilities or weaknesses discovered in previous versions are addressed.

3. L2TP/IPsec (Layer 2 Tunneling Protocol with IPsec): This protocol combines the tunneling capabilities of L2TP with the security of IPsec. It is supported by various operating systems and devices. However, L2TP/IPsec has been subject to some vulnerabilities and security concerns, so keeping it up to date helps mitigate these risks.

4. SSTP (Secure Socket Tunneling Protocol): Developed by Microsoft, SSTP uses the SSL/TLS protocol to establish a secure connection. It is primarily used on Windows platforms. While SSTP is considered secure, it may not be as widely supported as other protocols. Updating SSTP ensures compatibility and addresses any known vulnerabilities.

Reasons for not updating VPN protocols may include:

a. Compatibility concerns: Some older devices or software may not support the latest VPN protocol updates. In such cases, updating could lead to connectivity issues.

b. Disruptions during the update process: Updating VPN protocols might require restarting services or temporarily interrupting VPN connections, which can cause inconvenience or downtime for users.

c. Stability concerns: New protocol updates may introduce unknown bugs or compatibility issues, potentially impacting the stability and reliability of the VPN service. In such cases, organizations may prefer to delay updates until the new version is thoroughly tested and deemed stable.

It's important to balance the need for security, compatibility, and stability when deciding to update VPN protocols. In general, staying up to date with the latest protocol versions helps maintain the highest level of security and ensures compatibility with evolving network environments.

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Explanation:

The newton-second (also newton second; symbol: N⋅s or N s)[1] is the derived SI unit of impulse. It is dimensionally equivalent to the momentum unit kilogram-metre per second (kg⋅m/s). One newton-second corresponds to a one-newton force applied for one second.

Newton-second

Impuls Masse Geschwindigkeit.svg

For two objects moving with the same velocity (v), the object with the greater mass (m) will have the greater momentum (p).

During a straight-line roller coaster ride, the coaster steadily climbs up a large hill, then rolls down the hill and constantly changes speed as it quickly goes up and down smaller hills until the end of the ride when the coaster slowly comes to a complete stop. The true statement is:

c. The instantaneous acceleration will be greatest on the hills during the ride after reaching the top of the first hill.

During the climb up the first large hill, the coaster will experience a positive acceleration as it gains speed. As it rolls down the hill, it will experience a negative acceleration or deceleration. However, once it reaches the top of the first hill and begins going up and down smaller hills, it will experience constantly changing speeds and therefore, constantly changing instantaneous accelerations. The hills will cause the coaster to speed up and slow down rapidly, resulting in greater instantaneous accelerations. Finally, as the coaster comes to a stop at the end of the ride, its acceleration will decrease to zero.

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Answer:

its very easy

Explanation:

Answer:

Voltage V = 117.65 volts

the voltage across the light bulb's filament is 117.65 V

Explanation:

The power of a light bulb can be expressed with respect to voltage and current flow.

Power = voltage × current

P = VI

Making Voltage V the subject of formula;

V = P/I

Given;

Power P = 4.0W

Current I = 0.034A

Substituting the given values;

V = 4/0.034

V = 117.65 volts

The heating of air inside the balloon causes the volume to expand (Charles's Law), resulting in a decrease in the pressure compared to the surrounding air (Boyle's Law).

Hot-air balloon flight can be explained by the combined principles of Charles's Law, Archimedes' Principle, and Boyle's Law.

Charles's Law states that the volume of a gas is directly proportional to its temperature, assuming the pressure remains constant. In the case of a hot-air balloon, the air inside the balloon is heated, causing the gas molecules to move faster and increase in temperature. As a result, the volume of the gas expands, leading to an increase in the volume of the balloon.

Archimedes' Principle states that an object immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object. In the context of a hot-air balloon, the heated air inside the balloon is less dense than the surrounding cool air. The buoyant force acting on the balloon is equal to the weight of the air displaced by the balloon. This buoyant force is greater than the weight of the balloon itself and the payload, causing the balloon to rise.

Boyle's Law states that the pressure of a gas is inversely proportional to its volume, assuming the temperature remains constant. When the air inside the balloon is heated, the volume increases. As a result, the pressure inside the balloon decreases relative to the surrounding air pressure. The pressure difference creates a net upward force, contributing to the balloon's ascent.

In summary, the combined effects of Charles's Law, Archimedes' Principle, and Boyle's Law explain hot-air balloon flight. The heating of air inside the balloon causes the volume to expand (Charles's Law), resulting in a decrease in the pressure compared to the surrounding air (Boyle's Law). The buoyant force (Archimedes' Principle) acting on the less dense heated air allows the balloon to rise.

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Explanation:

F = 40 N

d = 3 m

Work

W = Fd

where: W - work, J

F - force, N

d - distance, m

W = Fd

W = (40 N)(3 m)

W = 120 Nm or 120 J

The distance the blind is pulled when 14 J of work are done is approximately 0.9333 meters.

To remove your blind casting from the bracket, push and lift it up against the pin on the opposite side. Turn this in the other direction until you hear the plastic wheel click, and then carefully remove the blind from the bracket.

\(W = F * d\)

d = W / F

Substituting the given values, we get:

d = 14 J / 15 N

Simplifying this expression, we get:

d = 0.9333 meters

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Wrap a sensing bulb in insulation to protect it from external factors, ensuring accurate temperature measurement. This creates a barrier between the bulb and the surrounding environment, preventing heat transfer and influencing the temperature only by the object or substance in contact.

A sensing bulb must not be affected by the air or liquid being cooled. It should be wrapped in insulation so that only the temperature affects the bulb.

The purpose of insulation is to protect the sensing bulb from any external factors that could interfere with its ability to accurately measure temperature. By wrapping the sensing bulb in insulation, it creates a barrier between the bulb and the surrounding air or liquid. This insulation prevents heat transfer from the surrounding environment to the bulb, ensuring that the temperature being measured is only influenced by the object or substance that the bulb is in contact with.

For example, let's say we have a temperature sensor in a refrigerator. The sensing bulb, which is responsible for measuring the temperature inside the fridge, is wrapped in insulation. This insulation prevents any fluctuations in the air temperature of the fridge from affecting the sensing bulb directly. Instead, the temperature recorded by the sensing bulb will primarily be influenced by the temperature of the items inside the fridge.

In summary, by wrapping the sensing bulb in insulation, we can ensure that only the temperature of the object or substance in contact with the bulb affects its readings. This allows for accurate temperature measurement without interference from the surrounding air or liquid.

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A projectile is launched horizontally with a speed of 85.5 m/s. if the projectile is launched 1.6m above the floor, it will take approximately 0.57 seconds for the projectile to hit the floor.

When a projectile is launched horizontally, its vertical motion is influenced by gravity while its horizontal motion remains uniform. In this case, we are given that the projectile is launched horizontally with a speed of 85.5 m/s and starts 1.6 m above the floor.

Since the horizontal motion is uniform, the time taken for the projectile to hit the floor depends only on its vertical motion. The vertical motion can be treated as a free-falling object under gravity.

We can use the equation of motion for free-falling objects:

h = (1/2) * g * t^2

where h is the vertical distance traveled, g is the acceleration due to gravity (approximately 9.8 m/s^2), and t is the time taken.

In this case, the initial vertical displacement h is 1.6 m, and we want to find the time taken t.

1.6 = (1/2) * 9.8 * t^2

Rearranging the equation and solving for t, we have:

t^2 = (2 * 1.6) / 9.8

t^2 ≈ 0.3265

t ≈ √0.3265

t ≈ 0.57 s

Therefore, it will take approximately 0.57 seconds for the projectile to hit the floor.

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Answer:

D Elastic collision because momentum is conserved

Explanation:

this is the answer may i be marked brainliest?

Answer: the first is incorrect the second is correct the third is correct

Explanation: the fourth is correct the fifth is incorrect

The equation needed to calculate the charge flow Q = I x t

The formula can be utilised to compute current.The electric current,

,in a wire can be found using the formula

=/,

where represents an amount of charge that passes a point in the wire over some amount of time, .

Electric current is the movement of an electric charge. Amperes are the units used to measure electric current. The ampere has the unit sign A.

When studying electricity, both coulombs and amperes are frequently utilised, but it's vital to keep in mind that they measure distinct things. Charge is measured by the coulomb, while the flow of charge is measured by the ampere.

One coulomb of charge passes a spot in a wire in one ampere of current in one second.

Any amount of time can be used to gauge how much charge is transferred; just that it cannot exceed one second.

Simply dividing a charge's amount by the length of time it was measured yields current.

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D. 55 Kg mass moving at 1 m/s, is the correct answer.

The more mass the object has, the greater inertia is. It doesn't matter how fast the object is going because inertia is depended on mass.