waxing or waning moon?

Answer:

Final speed, v = 54.64 m/s.

Explanation:

Given that,

Mass of a car, m = 2000 kg

Initial speed of the car, u = 23 mph = 10.28 m/s

height, h = 144 m

We need to find the speed of the car at the bottom of the hill. Let v is the speed. Applying conservation of energy as :

[tex]\dfrac{1}{2}mu^2+mgh=\dfrac{1}{2}mv^2\\\\v^2-u^2=2ah[/tex]

a = g here

[tex]v=\sqrt{2gh+u^2}\\\\v=\sqrt{2\times 10\times 144+(10.28)^2}\\\\v=54.64\ m/s[/tex]

So, the speed at the bottom of the hill is 54.64 m/s.

Using the principle of conservation of energy, the car will be going approximately 53.7 m/s when it reaches the bottom of the hill.

The question basically involves the principle of conservation of energy. You need to equate the total energy at the top of the hill to the total energy at the bottom. The total energy at the top is the sum of kinetic and potential energies. The kinetic energy is 0.5* m * v^2, where m = 2000 kg (mass) and v = 23 mph = 10.3 m/s (velocity). The potential energy is m * g * h, where g = 9.8 m/s^2 (gravity) and h = 144 m (height). The total energy at the bottom is kinetic energy (since potential energy is 0), which is 0.5 * m * u^2 where u is the final velocity. Equating the energies and solving for u, we get u = sqrt(2*g*h + v^2) =~ 53.7 m/s.

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Answer:

its unit is Ohm

Explanation:

Resistance means material which resist the passing current  through it and the value of resistance says how much the material is resisting the current and it temperature dependent and the unit is Ohm.

Answer:

Convection is the transfer of thermal energy from one place to another by the movement of gas or liquid particles. How does this happen? As a gas or liquid is heated, the substance expands. This is because the particles in liquids and gases gain kinetic energy when they are heated and start to move faster.

Answer:

fluids

Explanation:

on edg 2021

The potential difference will be 600 V.

Explanation:

Here the charged particle is said to exhibit a charge of -8 mC. So when it moves from point A to point B, it gains a kinetic energy of 4.8 J. Also, the charged particle is said to exhibit an electrostatic potential energy at points A and B.

The particle will obey conservation of energy. So the sum of energy exhibited by the particle at point B will be equal to the sum of energy exhibited by the particle at point A.

At point A, the kinetic energy is zero and the electrostatic energy will be represented as U₁.

Then, the total energy at point A = U₁

Similarly, at point B, the charged particle will exhibit kinetic energy as well as electrostatic potential energy (U₂).

Total energy exhibited by the charged particles at point B = U₂ + K.E = U₂+4.8.

Then, as per law of conservation of energy:

[tex]U_{2} + 4.8 = U_{1} \\\\U_{1} -U_{2} = 4.8[/tex]

It is known that electrostatic potential energy is the product of charge with the potential at that point.

So, [tex]U_{1} = QV_{1}[/tex] and [tex]U_{2} = QV_{2}[/tex]

Then, [tex]Q (V_{1} - V_{2}) = 4.8\\ \\-8*10^{-3} (V_{1} - V_{2})=4.8\\\\(V_{1} - V_{2}) = \frac{4.8}{-8*10^{-3} } = -0.6*10^{3} = -600 V[/tex]

Then, V₂-V₁ will be 600 V.

Thus, the potential difference will be 600 V.

Answer:

It is not as windy now as it was a little while ago

Slackening wind indicates that the wind speed or intensity is decreasing, meaning it is not as windy now as it was a little while ago.

When we say that the wind is slackening, it means that the speed or force of the wind is decreasing or getting weaker. It suggests that it is not as windy now as it was a little while ago. A slackening wind does not necessarily mean that the wind is now mixed with rain and sleet, nor does it automatically mean that the wind is creating dangerous driving conditions. It solely relates to the intensity or force of the wind which is lowering.

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Answer:

B)

Explanation:

Aside from his numerous inventions, Galileo also laid down the first accurate laws of motion for masses. Galileo measured that all bodies accelerate at the same rate regardless of their size or mass.

Answer:

Galileo and kepler

Explanation:

Aside from his numerous inventions, Galileo also laid down the first accurate laws of motion for masses. Galileo measured that all bodies accelerate at the same rate regardless of their size or mass.

Answer:

Photosynthetic organisms

Explanation:

The electromagnetic energy of sunlight is converted to chemical energy in the chlorophyll-containing cells of photosynthetic organisms. In eukaryotic cells these reactions occur in the organelle known as the chloroplast

Hope this helps! :)

Answer:

The producers

Explanation:

Final answer:

In a longitudinal wave, areas where particles are closer together are called compressions. The distance between two compressions or two rarefactions is the wavelength of the longitudinal wave, which characterizes sound waves among others.

Explanation:

In a longitudinal wave, the places where particles of matter are closer together are called compressions. Longitudinal waves consist of alternating areas of compressions and rarefactions. Compressions are regions of higher pressure, whereas rarefactions are areas of lower pressure. The wavelength of a longitudinal wave is the distance between two consecutive compressions or two consecutive rarefactions. Sound waves are a common example of longitudinal waves, where the vibration and movement of particles occur in the same direction as the propagation of the wave.

It's important to note that in a transverse wave, the oscillation of particles occurs perpendicular to the direction of the wave's travel. However, in longitudinal waves, such as sound waves, the particles move back and forth parallel to the direction of the wave, creating the compressions and rarefactions that characterize this type of wave.

Answer:

31.0 km

Explanation:

21.0+10.0=31.0 km

Answer:

Distance from starting point = 11 km, Distance ran altogether = 31 km

Explanation:

21 - 10 = 11

21 + 10 = 31

Answer:

Light that is visible to humans makes up only a small portion of the electromagnetic spectrum. In humans, light wavelength is associated with perception of color. The amplitude of light waves is associated with our experience of brightness or intensity of color, with larger amplitudes appearing brighter.

Explanation:

Final answer:

An arrangement of electric charges or a current creates both an electric field and a magnetic field. Mass generates a gravitational field, not related to charges or currents, and a quantum field is more broadly conceptual and not directly created by charges or currents. So the correct options are B and D.

Explanation:

The arrangement of electric charges or a current, which is the flow of electric charges, creates both an electric field and a magnetic field. Mass produces a gravitational field but is unrelated to electric charges or current. While a quantum field is a more comprehensive concept that includes various types of fields at the quantum level, it is not directly created by just the arrangement of electric charges or current alone.

Electric fields are created around objects that have a net electric charge, and these fields exert forces on other charged objects. On the other hand, magnetic fields are specifically generated by moving charges (current) or changing electric fields as per Ampere's Law and Maxwell's equations. This phenomenon underlies many technologies, including electric motors and magnetic imaging, by utilizing the interaction between current and the magnetic field it produces.

Gravity is the attraction of every body to every other body due to the masses of each body. The larger the mass, the greater the force. It also depends on the distances: the closer the bodies, the greater the force. Gravity is directed toward the center of a body, and the distance is measured from the center.

When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion. Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls.

Answer:

False

Explanation:

Mercury has 0 natural satellites.

Answer:

Pressure

Explanation:

This is because Air Pressure decreases as we move upwards from the Surface of the Earth. It is as the Number of Air Molecules get reduced at Higher Altitude which in turn reduces Atmospheric Pressure.

Hope This Helps !

Answer: Pressure

Explanation:

Answer:

The heat capacity of the sample of metal is 664j/kg.°C

Explanation:

Kindly find attached a detailed solution to this question for you reference.

Given data

Mass of sample m1= 0.45kg

Temperature of sample θs= 80°c

Mass of water mw = 0.7kg

Temperature of water θw= 15°C

Specific heat capacity of water Cw=

4200j/kg.°C

Equilibrium Temperature θ3= 21°C

HEAT LOSS BY SUBSTANCE =HEAT GAINED BY WATER

What is Quantity of heat?

Quantity of heat is the amount of heat absorbed or given out by a body Q=mcθ

What is the heat capacity?

Heat capacity is the amount of heat required to raise the temperature of a substance by 1k.The S.I unit is joule per Kelvin J/k

What is specific heat capacity?

The specific heat capacity is the amount of heat required to raise the temperature of 1kg of substance by 1k

Answer: -42 cm

Explanation: It explains after you answer

Answer:

Distance=: -42 cm

Height: 35 cm

Explanation:

Tells you on edg

Answer:

BCE

Explanation:

The provisions of the 1973 Vietnam War cease-fire are

Vietnam is a country located in the southeast Asian region on the Indochinese peninsula. It was under french colonial rule rule since 19th century.

Given are the provisions of the 1973 Vietnam War cease-fire.

The provisions of the 1973 Vietnam War cease-fire are

Therefore, the provisions of the 1973 Vietnam War cease-fire are

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Answer:

7. the ball with a mass of 8.0kg

8.1225 kg

9.4.2 kg-m/sec

10.15m/sec

11.0.001kgm/sec

Final answer:

The 4.0-kilogram ball requires more force to stop in 10 seconds. The car's mass is 1225 kg. The baseball's momentum is 4.2 kg-m/sec, and the turtle's momentum is 0.01 kg-m/sec.

Explanation:

To determine which ball requires more force to stop in 10 seconds, the momentum of each ball must be calculated. The force required to stop an object is related to the change in momentum and the time over which that change occurs (Force = change in momentum / time). The momentum of an object is the product of its mass and velocity (momentum = mass times velocity). So for the 8.0-kilogram ball, the momentum is 8.0 kg times 0.2 m/sec = 1.6 kg times m/sec. For the 4.0-kilogram ball, the momentum is 4.0 kg times 1.0 m/sec = 4.0 kg times m/sec. Therefore, the 4.0-kilogram ball would take more force to stop within the same time frame because it has a greater momentum.

The momentum of a car can be found by rearranging the momentum formula (momentum = mass times velocity) to solve for mass (mass = momentum / velocity). With a momentum of 24,500 kg times m/sec and a velocity of 20 m/sec, the car's mass is 24,500 kg times m/sec / 20 m/sec = 1225 kg.

To find the momentum of a baseball, multiply its mass by its velocity: 0.14 kg times 30 m/sec = 4.2 kg times m/sec.

The velocity of the baseball thrown by another pitcher can be found by dividing its momentum by its mass: 2.1 kg times m/sec / 0.14 kg = 15 m/sec.

The momentum of a turtle is the product of its mass and velocity: 1 kg times 0.01 m/sec = 0.01 kg times m/sec.

Answer:

false

Explanation:

Answer:

276 days

Explanation:

in order to decay to half, it will be 138 days. in order to half that again down to a quarter, it will be another 138 days. 138+138 is 276, thus, 276 days.

Answer:

276 days

Explanation:

Answer:

9806.65 Joules

Explanation:

The block sitting on a platform contains 9,800 Joules of potential energy.

Given the following data:

We know that acceleration due to gravity (a) for an object is equal to 9.8 meter per seconds square.

To find how much potential energy the block contains:

Mathematically, potential energy (P.E) is calculated by using the following formula:

[tex]P.E = mgh[/tex]

Where:

Substituting the given parameters into the formula, we have;

[tex]P.E = 50[/tex] × [tex]9.8[/tex] × [tex]20[/tex]

Potential energy = 9,800 Joules

Therefore, the block contains 9,800 Joules of potential energy.

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Answer:

5 m/s

Explanation:

The speed of a wave in a string is related to the tension in the string by the equation

[tex]v=\sqrt{\frac{T}{\mu}}[/tex]

where

v is the speed of the wave

T is the tension in the string

[tex]\mu[/tex] is the linear density of the string

We can rewrite the equation as

[tex]\frac{\sqrt{T}}{v}=\sqrt{\mu}[/tex]

In this problem, the tension in the string is changed; however, its linear mass density remains constant. So we can write:

[tex]\frac{\sqrt{T_1}}{v_1}=\frac{\sqrt{T_2}}{v_2}[/tex]

where:

T1 = 40 N is the initial tension in the string

v1 = 10 m/s is the initial speed of the wave

T2 = 10 N is the final tension in the string

Solving for v2, we find the final speed of the wave:

[tex]v_2=v_1 \sqrt{\frac{T_2}{T_1}}=(10)\sqrt{\frac{10}{40}}=5 m/s[/tex]

When lubricating the brake levers of a bicycle with a black lubricant, you are most likely to leave dark or smudged fingerprints on them. The black lubricant can transfer onto your fingers and when you touch the brake levers, it can leave visible marks that correspond to your fingerprints.

Fingerprints are typically formed by the natural oils and sweat on our skin, and lubricants like oil or grease can actually mask or reduce the visibility of fingerprints.

Therefore, if you are using a black lubricant on the brake levers, you would not leave distinct fingerprints on them. Instead, you may leave smudges or marks from the lubricant itself, which can be visible on the surface of the levers.

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Answer: The absolute value of the mutual force between the two point charges is 5.3952 x 10^-3 N.

Explanation:

The mutual force between two point charges can be calculated using Coulomb's law, which states that the force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them:

F = k * (q1 * q2) / r^2

where F is the force, k is Coulomb's constant (9.0 x 10^9 N m^2/C^2), q1 and q2 are the charges of the two-point charges, and r is the distance between them.

In this problem, q1 = 9.2 E-6 C, q2 = 3.5 E-6 C, and r = 3 E-2 m. Substituting these values into Coulomb's law, we get:

F = (9.0 x 10^9 N m^2/C^2) * [(9.2 E-6 C) * (3.5 E-6 C)] / (3 E-2 m)^2

F = 5.3952 x 10^-3 N

The absolute value of the mutual force between the two point charges is 5.3952 x 10^-3 N.

Answer:

1000 N

Explanation:

The magnitude of the electrostatic force between two charged object is given by

[tex]F=k\frac{q_1 q_2}{r^2}[/tex]

where

k is the Coulomb constant

q1, q2 is the magnitude of the two charges

r is the distance between the two objects

Moreover, the force is:

- Attractive if the two forces have opposite sign

- Repulsive if the two forces have same sign

In this problem:

[tex]q_1=q_2=+1C[/tex] are the two charges

r = 3000 m is their separation

Therefore, the electric force between the charges is:

[tex]F=(9\cdot 10^9)\frac{(1)(1)}{3000^2}=1000 N[/tex]

Answer:

When one object heats another, the temperature increase of one object does not always equal the temperature decrease of the other object because one object has a higher specific heat than the other.

The temperature increase of one object does not necessarily equal the temperature decrease of the other during a heat transfer process. Factors such as the mass of the substance and certain physical properties related to its phase also influence the heat transferred. Heat transfer is guided by the law of conservation of energy, ensuring total energy remains constant.

When two objects at different temperatures come into contact, heat flows from the hotter object to the colder one, a process known as heat transfer. However, the temperature increase of one object does not equal the temperature decrease of the other. This is due to the fact that the heat transferred to or from a substance depends not only on the difference in temperature, but also on the mass of the substance and certain physical properties related to the phase of the substance.

Let's consider two objects, object X with a temperature Tx and object Y with a temperature Ty. When X and Y come into contact, heat spontaneously flows from X (hotter object) to Y (colder object), resulting in a loss of thermal energy for X and a gain for Y. The final temperatures of X and Y will not be simply Tx - Ty, and Ty + Tx, they will depend on the specific heat capacities and masses of the objects (not included in the initial question).

This concept is deeply connected with the law of conservation of energy, which states that energy cannot be created or destroyed, but can only be transferred or transformed from one form to another. Consequently, the total energy of the system (both objects) remains constant during this process of heat transfer.

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Answer:

60m/s

Explanation:

v=s÷t

75m÷1.25s=60m/s

Answer

60

Explanation:

This is because if the question gives you the distance and the time, you have to find the speed.

Answer:

true

Explanation:

Answer:

this would be be true but of the ingredients in it.