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3 years ago

How would an object’s kinetic energy change if it’s mass decreased by a factor of 3 and it moved 6 times faster?

2 answers:

7 0

Answer: Decreases in mass cause decreases in kinetic energy due to the aforementioned positive relationship between the two. Therefore when mass is decreased, an increase in kinetic energy is possible if velocity increases.

Artist 52 [7]3 years ago

3 0

Answer:: Decreases in mass cause decreases in kinetic energy due to the aforementioned positive relationship between the two.

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Without friction, what force is needed to maintain a 1,000 kg car in uniform motion for 30 minutes?

VARVARA [1.3K]

<span>The answer is none. According to the first law of Newton, an object stays at the same speed in the same direction if there are not forces unbalancing the object. Without friction, the car would be moving forever, unless there is another force accelerating or stopping the car.</span>

6 0

4 years ago

Which statement about real gases is true? A) Forces of attraction and repulsion exist between gas particles at close range. B) T

olga55 [171]

Answer: A) Forces of attraction and repulsion exist between gas particles at close range.

Explanation:

The <u>Ideal Gas equation</u> is:

$P.V=n.R.T$

Where:

$P$ is the pressure of the gas

$V$ is the volume of the gas

$n$ the number of moles of gas

$R$ is the gas constant

$T$ is the absolute temperature of the gas in Kelvin

According to this law, molecules in gaseous state do not exert any force among them (attraction or repulsion) and the volume of these molecules is small, therefore negligible in comparison with the volume of the container that contains them. In this sense, real gases can behave approximately to an ideal gas, under conditions of high temperature and low pressures.

However, at low temperatures or high pressures, real gases deviate significantly from ideal gas behavior. This is because at low temperatures molecules begin to move slower, allowing the repulsive and attractive forces among them to take effect. In fact, <u>the attraction forces are responsible for the condensation of the gas</u>. In addition, at high pressures the volume of molecules cannot be approximated to zero, hence the volume of these molecules is not negligible anymore.

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4 years ago

In general, which type of planet would you expect to cause the largest doppler shift in the spectrum of its star?.

PilotLPTM [1.2K]

A giant (massive) planet close to the star is expected to cause the largest Doppler shift in the star's spectrum.

<h3>What is the Doppler Shift Method for Detecting Exoplanets?</h3>

Doppler spectroscopy is used to capture periodic velocity shifts in stellar spectra caused by orbiting giant planets. (This method is also known as the radial velocity method.)
The Doppler method, which is most commonly used to find exoplanets, is most suitable to look for very massive planets orbiting near their parent stars

<h3>What does the Doppler method tell us about planets? </h3>

The Doppler shift data can tell us something about the mass of the planet and the shape of its orbit. Since the Doppler shift only knows how fast it approaches and moves away from Earth, it is not possible to determine the exact mass of the planet without knowing the inclination of its orbit. Doppler data give a lower bound on mass.

To learn more about Doppler shift visit:

brainly.com/question/29022708

#SPJ4

8 0

1 year ago

A pendulum clock depends on the period of a pendulum to keep correct time. Suppose a pendulum clock is keeping correct time and

Mashutka [201]

Answer:

time period is increased so the clock will become SLOW

Explanation:

As we know that the time period of the simple pendulum is given by the formula

$T = 2\pi\sqrt{\frac{L}{g}}$

here we know that

L = distance of the pendulum bob from the hinge

g = acceleration due to gravity

now here the bob slide down so that the length of the pendulum is being increased

so time period T of the pendulum is also increased

so here the pendulum will take more time to oscillate or to complete one oscillation

so clock will become SLOW

8 0

3 years ago

Which are uses of fiber optics? Check all that apply.

RideAnS [48]

Answer:

Transmission of telephone signals

Explanation:

Fiber optics are used for the transmission of telephone signals.

4 0

4 years ago

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