How big would the coefficient of static friction between the upper and lower block have to be so that the upper block would not slip on the lower block?.

Time elapsed is = 680/ 343 = 1.98. Calculating the time it takes for the sound to travel from the source to the cliff and back again can help us establish how long it was before we heard an echo.

The answer is 0.1 seconds, exactly. When a sound is reflected, it causes an echo that delays the direct sound's arrival reaching the listener. The time difference between the original sound and the reflected sound must be at least 0.1 seconds for there to be a clear echo.

As a result, seconds must pass between hearing the original sound and the echo for the sound to be audible. The distance formula [d = V] might be used.

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Speed, distance and time can be calculated using a magic triangle. D (the distance) goes in the top of the triangle, S (speed) goes in the bottom left of the triangle and T (time) goes in the bottom right of the triangle.

The magnitude of the average acceleration of the ball during its contact with the wall is  68000 m/s².

When the ball collides with the wall, it experiences a change in momentum. The time interval during which the ball is in contact with the wall is 3.95 ms, or 0.00395 s. Using the principle of conservation of momentum,

We  use the average acceleration formula to find the acceleration of the ball during the collision.Initial momentum of the ball before collision = m₁v₁ = (0.0515 kg)(27.0 m/s) = 1.3905 kg⋅m/s. Final momentum of the ball after collision = m₂v₂ = (0.0515 kg)(-19.0 m/s) = -0.9785 kg⋅m/s

According to the conservation of momentum, the initial momentum is equal to the final momentum, so:m₁v₁ = m₂v₂

1.3905 kg⋅m/s = -0.9785 kg⋅m/s  Solving for the mass, we get: = 0.0515 kg

Using the average acceleration formula: a = Δv/Δt = (v₂ - v₁)/Δt = (-19.0 m/s - 27.0 m/s)/0.00395 s = -16455.7 m/s² Since the acceleration is in the opposite direction to the initial velocity, we take the magnitude to be: |a| = 16455.7 m/s² ≈ 68000 m/s².

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Andy uses 189,000 joules of energy to heat 1500g of water from 10°C to 40°C.

The amount of energy used to heat the water can be calculated using the formula:

Q = m * c * ΔT

where:

Q = amount of energy used (in joules)

m = mass of water (in kilograms)  = 1500 g / 1000 = 1.5 kg

c = specific heat capacity of water (4200 J/kg°C)

ΔT = change in temperature (in °C)

plugging in the values into the formula:

Q = 1.5 kg * 4200 J/kg°C * (40°C - 10°C)

Q = 1.5 kg * 4200 J/kg°C * 30°C

Q = 189,000 joules

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Answer:

It depends if your smart

Explanation:

Also, I plead the 5th

The change in temperature of the aluminium block is 6.75K.

Change in temperature is a process whereby the degree of hotness of a body (or medium) changes.

To calculate the change in temperature of the aluminium block, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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The 6 m ramp has greater mechanical advantage than 4 m ramp.

The velocity ratio of a ramp or inclined system is determined from the ratio of the distance travelled by the effort to the distance travelled by the load.

Mathematically, the formula for velocity ratio of the ramp is given as;

V.E = dE / dL

V.R = 1 / sinθ

where;

The mechanical advantage of the ramp is calculated by the following formula.

M.A ∝ V.R

where;

sinθ = dE / dL

The mechanical advantage of the

For a ramp of 6m,

M.A = 1 / sinθ = 1 / ( 1 m / 6 m) = 6

For a ramp of 4 m,

M.A = 1 / sinθ  = 1 / ( 1 m / 4 m ) = 4

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According to the law of conservation of momentum, the total momentum of a system remains constant if no external forces act on it the total momentum of the system before and after the collision will be conserved. The correct option d.

The law of conservation of momentum states that in a closed system, the total momentum before a collision is equal to the total momentum after the collision, provided there are no external forces acting on the system. The law applies to both linear and angular momentum.

In the given scenario, the total momentum of the system before the collision is the sum of the momenta of the two disks. After the collision, the total momentum of the system should still be the same as before the collision if no external forces are present.

The individual velocities and directions of the disks after the collision may change, and they may continue to move at different velocities or even come to rest. The law of conservation of momentum does not dictate the velocities or outcomes of the individual objects involved in the collision. It only states that the total momentum of the system remains constant.

Therefore, option d) The total momentum of the system before and after the collision will be conserved is the correct statement according to the law of conservation of momentum.

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Answer:

b. between 2 s and 4 s

Explanation:

2-4 was both 3m/s

Answer:B make sure it’s the same order

Explanation:

Correct on Plato

Answer:

32.32857

Explanation:

Searched on the web

Isaac Newton’s three laws of motion explain how a rocket in space can move objects.

The first law states that an object will remain at rest or in uniform motion in a straight line unless acted on by an external force. This means that a rocket in space will continue in its original path until an external force, such as thrust from a rocket engine, is applied to it. This force is what propels the rocket forward and propels any object it is carrying with it.

The second law explains the relationship between an object’s mass, its acceleration, and applied force. This law states that the acceleration of an object is directly proportional to the force applied and inversely proportional to the object’s mass. This means that a rocket engine must apply enough force to overcome the mass of the rocket and any objects it is carrying. The more mass the rocket has to move, the more force needs to be applied.

Newton's third law of motion states that for every action, there is an equal and opposite reaction. This law can be applied to explain how a rocket in space can move objects. In essence, the rocket is able to move by using its fuel to create thrust. When the fuel is ignited, it creates an intense amount of pressure, which pushes the rocket in the opposite direction. As the rocket moves away from the fuel, the objects around it also move in the opposite direction, creating the desired effect.

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A deep water wave with a 1.5-meter wavelength moves at a pace of 1.53 meters per second.

Wavelength In physics, a periodic wave's wavelength is the length over which its shape repeats. It is a characteristic of all spatial wave patterns, including standing waves and traveling waves. The distance between two adjacent crests, troughs, or zero crossings on the wave that correspond to successively in the same phase. The wavelength has a reciprocal relationship with the spatial frequency. When referring to wavelength, the Greek letter lambda () is usually used. When referring to modulated waves, their sinusoidal envelopes, or waves made by the interference of numerous sinusoids, the term wavelength is also occasionally employed.

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Answer:

11.85 k

Explanation:

11.85 k

The torque acting on the coil is 0.5 x 10^-3 Nm.

Given, Magnetic dipole moment of the coil, m = 25.0 Am²

Strength of the magnetic field of earth, B = 20.0 x 10^-6 T

The torque that acts on the coil is given by the formula, Torque = m × B sin θ          Where,θ = angle between magnetic moment and the magnetic field.

Torque = m × B sin θT = 25.0 Am² × 20.0 x 10^-6 T × sin 90°  [Since, the coil is placed perpendicular to the horizontal magnetic field of the earth]

T = 25.0 Am² × 20.0 x 10^-6 T × 1T = 0.5 x 10^-3 Nm

Hence, the torque acting on the coil is 0.5 x 10^-3 Nm.

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Answer:

3.03

Explanation:

time=distance/speed

1km=1000m

1000÷330

=3.030

Given:

Cross-sectional area of the pipe at C is half that at A.

Cross-section area at A = Cross sectional area at D.

Water flows in from right to left.

Let's determine which of the following correctly ranks the mass flow rate in sections A, B, C, and D.

According to Bernoulli's principle:

Mass flow rate = density x volume of flow rate.

Where:

Volume of flow rate = (cross sectional area) x (velocity).

Now, to apply the volume flow rate in different sections of the pipe, we have:

Volume flow rate = A*V = constant.

The volume flow rate is constant, according to the equation of continuity.

Now, the equation of continuity is:

This means the rate of mass flow in all sections will be equal.

Therefore, the correct ranking of the mass flow rate of the four sections are:

fA = fB = fC = fD

ANSWER: D.

A. =4500 60 (+15) an equation of a sinusoidal function that models the distance of the satellite from the equator as a function of time in hours. ,B. -3181.98 km south of the equator .

The methods below show how to build a sinusoidal functions equation in the form y = Asin(B(x - C)) + D given its graph. D: Calculate D by averaging the sinusoid's regional maximum and minimum. The "midline," or the line on which the sinusoid is centered, is defined as y=D.

A sinusoidal function can be used as a model for items that display periodic behavior since these functions.

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Answer:

The greater wax moth developed the ability to hear frequencies up to 300kHz to trick bats, their chief predators.

Explanation:

Dogs commonly listen to frequencies of about 30 kHz. But nothing matches the moths 300-kHz maximum. Since there aren't any noises in an environment that get close, scientists hypothesize that greater wax moths developed super sensitive hearings to trick bats, their chief predators. it can hear wavelengths up to 300 kHz, well exceeding the range of any other creature and higher than any bat can sound.

Answer:

A) 35 ft

B) 5 ft

C) Net displacement = distance covered by the dog to retrieve the stick - distance covered before the dog starts chewing the stick

Explanation:

A) Total distance covered by the dog = 20 + 15

                                  = 35 ft

B) Since the other distance covered by the dog before chewing the stick, after the retrieval, was in an opposite direction to the initial direction, then;

total displacement of the dog = 20 - 15

                                  = 5 ft

C) Net displacement = distance covered by the dog to retrieve the stick + distance covered before the dog starts chewing the stick

But, displacement involves a specified direction. The distance covered before the dog starts chewing the stick was in an opposite direction to the initial direction.

Thus,

Net displacement = distance covered by the dog to retrieve the stick - distance covered before the dog starts chewing the stick

The 40mm rubber ball munition used by the Marines typically contains rubber balls that have a caliber of 40mm. The caliber refers to the internal diameter of the barrel or the diameter of the projectile itself.

In this case, the munition is specifically designed for 40mm launchers or firearms. The 40mm rubber ball munition is commonly used for crowd control and non-lethal force situations.

The rubber balls are designed to be less lethal compared to traditional ammunition, as they are intended to incapacitate or disperse individuals without causing fatal injuries.

These rubber balls are usually made from a durable and dense rubber material that allows them to be fired accurately and effectively.

The 40mm caliber provides a suitable size for the rubber balls to be propelled with sufficient force and accuracy while minimizing the risk of causing severe harm.

It is important to note that specific details regarding munitions can vary based on the manufacturer and specific military specifications.

Therefore, it is always recommended to refer to official military sources or consult with experts for precise and up-to-date information on the caliber of rubber balls used in the 40mm rubber ball munition for the Marines.

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Answer:

Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass. This shows that the bowling experiences a much greater force.

Explanation: that is the explanation

Answer:

✔️Car A and Car B are moving in opposite directions.

✔️Car A is moving faster than Car B.

✔️Car A started ahead of car B.

Explanation:

The position-time graph shows Car A and Car B. The graph reveals that both cars are moving in opposite directions.

Car A shows a positive slope and Car B shows a negative slope.

The graph also shows that Car A started ahead of Car B. It's seen from the graph that Car A started from the origin.

Therefore, we conclude that the correct statements are:

✔️Car A and Car B are moving in opposite directions.

✔️Car A is moving faster than Car B.

✔️Car A started ahead of car B.

Answer:

merry cristmas the other person answered right I checked for you

Explanation:

happy NEW YEARS FINALLY NO MORE 2020

Ethanol from sugarcane has a medium net energy yield, while ethanol from corn has a low net energy yield due to several factors.

1. Sugarcane contains more sugar: Sugarcane has a higher sugar content compared to corn. As a result, more ethanol can be produced from the same amount of sugarcane as opposed to corn.

2. Efficiency of conversion process: The conversion process of sugarcane to ethanol is more efficient than that of corn. This means that less energy is lost in the conversion process, leading to a higher net energy yield for sugarcane-based ethanol.

3. Growing conditions: Sugarcane grows in tropical climates and requires less fertilizer and irrigation compared to corn, which is grown in temperate climates. This leads to lower energy input requirements for sugarcane, contributing to its higher net energy yield.

4. Byproducts: The process of producing ethanol from sugarcane results in a useful byproduct called bagasse, which can be used as a biofuel for power generation. This additional energy source improves the net energy yield of sugarcane ethanol. In contrast, corn-based ethanol production does not offer such beneficial byproducts.

In summary, the higher sugar content, more efficient conversion process, lower energy input requirements, and useful byproducts contribute to the medium net energy yield of ethanol from sugarcane compared to the low net energy yield of ethanol from corn.

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Answer:

Virtually all the mass of an atom resides in its nucleus, according to Chemistry

Explanation:

Answer:

They are both placed at high vantage points for an optimal experience.

Explanation:

Gravity works in your favor when participating in bungee jumping as well as ziplining

The distance from fourth maximum to the central maximum is, y₄ = 3.2 cm

Diffraction is defined as the interference or bending of waves passing through an aperture around the corner of an obstacle or into the geometric shadow area of ​​the obstacle/aperture. Diffractive objects or apertures are secondary sources of propagating waves. It is the process by which a ray or other wave system widens as a result of passing through a narrow aperture or edge. It usually involves interference between the generated waveforms.

Given,

λ = 550 nm

y₃ = 3Dλ/d

y₃ = 3 cm

3Dλ/d = 3 cm

D/d = (3 × 10⁻²)/3λ

Since, λ = 550 nm

D/d = (3 × 10⁻²)/(3×550×10⁻⁹)

D/d = 10⁶/55

Now, λ = 440 nm

y₄ = 4Dλ/d

y₄ = 4 (440×10⁻⁹) 10⁶/55

y₄ = 3.2 cm

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Answer:

True

Explanation:

I just know.

Scientists use the arrival times of seismic waves at multiple stations, along with amplitude data, to triangulate the location of an earthquake epicenter.

To determine the location of an earthquake, scientists use the data recorded at seismic stations. The seismic stations are equipped with seismometers that detect and record seismic waves generated by the earthquake. These waves travel through the Earth's interior and arrive at different times at various seismic stations.To locate the epicenter of the earthquake, scientists analyze the time differences between the arrivals of primary (P) waves and secondary (S) waves at multiple stations. P waves are faster and arrive first, followed by slower S waves. By comparing the time interval between the arrival of P and S waves at different stations, scientists can calculate the distance of each station from the earthquake epicenter.

Using the distances from at least three seismic stations, scientists plot circles around each station on a map. These circles represent the potential distance between the station and the epicenter. The intersection of the circles determines the most likely location of the earthquake epicenter. This method is known as the "triangulation" technique.Additionally, the amplitude of the recorded seismic waves provides information about the earthquake's magnitude. By analyzing the amplitude data from different stations, scientists can estimate the earthquake's size or magnitude.

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Note- Sorry The diagram cannot be added .

Explanation:

hopefully this helps.