15. Where is chemical energy contained in a compound?

Answer:

No

Explanation:

The density of the oil is different from the density of the water.

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.

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:

C

Explanation:

Answer:

Coil the wire around a nail.

Explanation:

If Betty wants to increase the strength of the electromagnet, she should coil the wire around an object that conducts electricity. Plastic, paper, and glass do not conduct electricity, so Betty should coil the wire around a nail.

Answer:

Coil the wire around a nail.

Answer:

225

Explanation:

The period of rotation of Venus is 243 Earth days, which is longer than the 225 days it takes the planet to orbit the sun. Moreover, the rotation is in the opposite direction from other planets in the solar system.

Answer:

225

Explanation:

Answer:

52

Explanation:

W = F x s

520 = F x 10

F = 520 ÷ 10

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:

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:

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:

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:

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

Correct Option:

X shows positive while Y shows negative charges, create the electric field as shown.

Option: D

Explanation:

The idea of an electric field provides a way to define how starlight travels to enter our eyes across huge distances of empty space.The electric field is a quantity of vectors that is present at any point in space. The electric field at a region shows the force that, if put at that position, will operate upon a positive charge device.

The direction of the electric field points directly at a positive point charge, and straight at a negative point charge. The field direction is implemented to the force direction exert on a positive test charge. It is externally from a positive charge and radially in toward a negative point charge.

Answer:

False

Explanation:

Mercury has 0 natural satellites.

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:

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

Answer:

c. 0.12 m/s

Explanation:

by using momentum formula [tex]v_2=\frac{m_1\times v_1}{m_1+m_2}[/tex]

we get

[tex]v_2=\frac{0.15\times 50}{0.15+65}=0.12[/tex]

The recoils velocity of the puck-goalie system would be 0.12 meters/second, therefore the correct answer is option C.

It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle, and the momentum of any particle is expressed in Kg m/s unit.

As given in the problem we have to find the recoil velocity of a 65 kg ice hockey goalie who catches a 0.15 kg hockey puck slapped at him at a velocity of 50 m/s. Assume that the goalie is at rest before catching the puck, and friction between the ice and the puck-goalie system is negligible.

By using the conservation of the momentum,  

The velocity of the recoil =  0.15*50 / (0.15+65)

                                          =0.12 meters / second

Thus, the recoil velocity of a 65 kg ice hockey goalie would be 0.12 meters /second, therefore the correct answer is option C.

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Answer:

engineers plan, carpenters do the manual work

Explanation:

engineers plan and sketch out the blueprint, while carpenters do the cutting, shaping and fastening of wood material, carpenters do the construction and repair

Answer:

The engineers do most of the planning and sketching of the plan, While a carpenter's job is to perform work entailing the cutting, shaping, and fastening of wood or material such as fiberboard that is treated as wood.

Explanation:

Carpenters perform the two principal jobs of construction and repair. Other then an engineer.

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:

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:

The molecular motion starts to speed up when the black shirt becomes hot. because the light that absorbed from the black shirt gets converted to heat, and then absorbed by the shirt.

Explanation:

Answer:

true

Explanation:

Answer:

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

Answer:

Mass = 5 unit

Length = 5 unit

Time =  0.5 unit

Explanation:

As we know that the units are as following

Force = 100 N

Velocity = 10 m/s

Energy = 500 J

i) For mass we know that

[tex]Force = mass \times \frac{velocity}{time}[/tex]

[tex]100 = mass \times \frac{10}{0.5}[/tex]

[tex]mass = 5 units[/tex]

ii) For length we know that

[tex]Force \times distance = energy/work[/tex]

[tex]100 (d) = 500[/tex]

[tex]Length = 5 units[/tex]

iii) for Time we know that

[tex]Power = \frac{Energy}{time}[/tex]

[tex]Force \times velocity = \frac{Energy}{time}[/tex]

[tex]time = \frac{500}{100\times 10}[/tex]

[tex]Time = 0.5 unit[/tex]

Answer:

7.5 m/s

Explanation:

The center of the string is a single point following projectile motion. At the top of its trajectory, the vertical component of the velocity is 0 m/s.  In the horizontal direction, assuming negligible air resistance, the acceleration is 0 m/s², so the horizontal velocity is the same as the x component of the initial velocity.  Therefore, the net speed of the center of the string is equal to the initial horizontal component of the velocity.

v = vₓ = 15 m/s cos 60° = 7.5 m/s

At the top of the trajectory, the speed of the center of the string is the same as the initial horizontal velocity, which is 7.5 m/s. This is because the vertical component of the velocity becomes zero while the horizontal component remains unchanged. Thus, the speed of the center of the string is 7.5 m/s.

To determine the speed of the center of the string at the top of its trajectory, we need to consider the initial conditions and the influence of gravity on the projectile motion.

The toy is thrown with an initial speed of 15 m/s at an angle of 60 degrees above the horizontal. We can break this down into horizontal and vertical components:

At the top of the trajectory, the vertical component of the velocity becomes zero since the toy momentarily stops moving upwards and is about to start descending. The horizontal component, however, remains unchanged as there is no horizontal acceleration acting on it (ignoring air resistance).

Therefore, at the top of the trajectory, the speed of the center of the string is the horizontal component of the initial velocity: 7.5 m/s.

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:

87,500 J

Explanation:

Power = energy / time

3,500.0 W = E / 25.0 s

E = 87,500 J

Answer:

C

Explanation:

Greater surface area will allow the sugar to dissolve faster. Stirring and hot water will also help dissolve the sugar faster.

Answer:

D

Explanation:

stirring temperature small particle size

Answer: -42 cm

Explanation: It explains after you answer

Answer:

Distance=: -42 cm

Height: 35 cm

Explanation:

Tells you on edg