A 3-ohm resistor and a 6-ohm resistor areconnected in parallel across a 9-volt battery.
Which statement best compares the potential
difference across each resistor?
(1) The potential difference across the 6-ohm
resistor is the same as the potential
difference across the 3-ohm resistor.
(2) The potential difference across the 6-ohm
resistor is twice as great as the potential
difference across the 3-ohm resistor.
(3) The potential difference across the 6-ohm
resistor is half as great as the potential
difference across the 3-ohm resistor.
(4) The potential difference across the 6-ohm
resistor is four times as great as the potential
difference across the 3-ohm resistor.

Answer:

  about 7500 km

Explanation:

The mass of planet Katar is 7.27×10^25 kg. The force on the kangaroo is given by ...

  F = GmM/r^2

Solving for r, we have ...

  r = √(GmM/F) = √(6.67×10^-11 × 78.2 × 7.27×10^25 / 6742) ≈ √(5.62×10^13)

This is in meters, so the radius in km is about ...

  r ≈ 7500 km

Answer:

I don't do physics , I'm sorry can't help you

Final answer:

Impulse corresponds to the change in momentum. Given a soccer ball weighing 0.40kg moving first at 18m/s north and then hit in the opposite direction at 22m/s, the impulse delivered to the ball by the player is approximately 16 kg.m/s in the opposite direction of the initial movement.

Explanation:

In the field of physics, impulse is defined as the change in momentum of an object upon interaction with an external force and is calculated by multiplying the force applied to the object by the time interval (duration) the force was acting. When a soccer player strikes the ball, he or she applies a force that changes the soccer ball's momentum.

Considering your question about the soccer ball, the initial momentum of the ball can be calculated by multiplying its mass (0.40 kg) by its velocity (18 m/s), giving 7.2 kg.m/s north. When the player hits the ball, it moves in the opposite direction (south) with a velocity of 22 m/s. Thus, the final momentum of the ball is 0.40 kg x -22 m/s = -8.8 kg.m/s.

Impulse is the change in momentum, so it's the final momentum minus the initial momentum, which equates to -8.8 kg.m/s - 7.2 kg.m/s= -16 kg.m/s south or +16 kg.m/s north, depending on the coordinate system you choose (north could be either positive or negative). Since the direction reversed, this is why we have a negative sign.

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Jet stream runs along the top of the troposphere as a high-speed, narrow air current flowing from west to east.

The "jet stream" is the narrow, high-speed tropospheric air current that flows west to east. The jet stream is a major atmospheric phenomena that occurs between 9 and 16 kilometres above the Earth's surface. Cold polar air and warmer equatorial air cause it. The jet stream's meandering route can affect weather patterns, storm movement, and large-scale weather. The jet stream's behaviour affects travel schedules and fuel efficiency, thus meteorologists use it to anticipate weather.

"Jet stream." The jet stream is a narrow, high-speed air movement that sweeps along the troposphere's top 9–16 kilometres (30,000–50,000 feet) above Earth. It shapes weather patterns and influences weather systems worldwide as it moves west to east. The jet stream affects temperature, precipitation, and atmospheric conditions, thus meteorologists study it to predict weather changes.

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Complete quesion:- "What runs along the top of the troposphere and is a high-speed, narrow air current flowing from west to east?"

The metricsystem was first put into practice in 1799, during the French Revolution, when the existing system of measures became impractical for trade and was supplanted by a decimal system based on the kilogram and the meter.

What is metric system?

During the FrenchRevolution, the existing system of measures became impractical for trade and was replaced by a decimalsystem based on the kilogram and the meter, and the metricsystem was born.

In 1793, the meter was defined as one ten-millionth of the distance from the equator to the NorthPole along a great circle, implying that the Earth's circumference is approximately 40000 km.

The meter was redefined in 1799 in terms of a prototype meter bar.

The meter was introduced as a new unit of length, defined as one ten-millionth of the shortestdistance between the NorthPole and the Equator passing through Paris, assuming an Earth flattening of 1/334.

Thus, this is the history of the metric system as it applies to the meter.

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Answer and explanation;

In 1670 Gabriel Mouton, Vicar of St. Paul’s Church and an astronomer proposed the swing  length  of  a  pendulum  with  a  frequency  of  one  beat  per  second  as  the  unit  of length.

In 1791 the Commission of the French Academy of Sciences proposed the name meter to the unit of length. It would equal one tens-millionth of the distance from the North Pole to the equator along the meridian through Paris.It is realistically represented by the distance between two marks on an iron bar kept in Paris.

In 1889 the 1st General Conference on Weights and Measures define the meter as the distance between two lines on a standard bar that made of an alloy of 90%platinum with 10%iridium.

In 1960 the meter was redefined as 1650763.73 wavelengths of orange-red light, in a vacuum, produced by burning the element krypton (Kr-86).

In 1984 the Geneva Conference on Weights and Measures has  defined  the  meter  as  the  distance  light  travels,  in  a  vacuum,  in 1299792458⁄ seconds  with  time  measured  by  a  cesium-133  atomic  clock  which  emits  pulses  of radiation at very rapid, regular intervals.