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4 years ago

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A scientist announces that the best possible chance for finding life on other bodies within our solar system would be on Jupiter

's moon Europa. The scientist responsible for this statement would be in the scientific field of _____.
astronomy
geology
meteorology
oceanography

1 answer:

wel4 years ago

4 0

The scientific field of the This whole text is Astronomy

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Two identical loudspeakers are placed on a wall 1.00 m apart. A listener stands 4.00 m from the wall directly in front of one of

natita [175]

Answer:

The phase difference is 0.659 rad.

Explanation:

Given that,

Distance between two identical loudspeakers d= 1.00 m

Distance between speakers and listener r= 4.00 m

Frequency = 300 Hz

Suppose we need to find the phase difference in radian between the waves from the speakers when they reach the observer

We need to calculate the r'

Using Pythagorean theorem

$r'=\sqrt{d^2+r^2}$

Where, d = distance between two identical loudspeakers

r = distance between speakers and listener

Put the value into the formula

$r'=\sqrt{(1.00)^2+(4.00)^2}$

$r'=\sqrt{1.00+16.00}$

$r'=4.12\ m$

We need to calculate the path difference

Using formula of path difference

$|r'-r|=4.12-4.00$

$|r'-r|=0.12\ m$

We need to calculate the wavelength

Using formula of wavelength

$\lambda=\dfrac{v}{f}$

Where, v = speed of sound

f = frequency

Put the value into the formula

$\lambda=\dfrac{343}{300}$

$\lambda=1.143\ m$

We need to calculate the phase difference

Using formula of phase difference

$\phi=\dfrac{2\pi\times|r'-r| }{\lambda}$

$\phi=\dfrac{2\pi\times0.12}{1.143}$

$\phi=0.659\ rad$

Hence, The phase difference is 0.659 rad.

7 0

4 years ago

Janice has just measured the density of an object. Which value is possible? (Density: D = )

Sunny_sXe [5.5K]

By definition, the density of an object is given by:

$D = \frac{M}{V}$

Where,

M: mass of the object

V: volume of the object

Since the mass and volume of an object are numerical values greater than zero, then it follows that:

$D> 0$

It is important to respect the units of each measure.

For this case we can use the grams for the mass and cubic centimeters for the volume.

Answer:

A possible value for density is given by:

$6 \frac{g}{cm^3}$

7 0

3 years ago

Read 2 more answers

Some life forms move so slowly that their movement can not be detected by normal observation the best way to determine any movem

yaroslaw [1]

because the form can be watched over a long time for deviations from the mark.

like fingernails, the grow slowly too. after a time, they get clipped

6 0

3 years ago

A simple pendulum is 1.15 meters long and has a period of 6.29 seconds. The pendulum is on an unknown planet. What is the accele

Nastasia [14]

Answer:

The value of the acceleration of gravity of the Unknown Planet = 1.14 $\frac{m}{s^{2} }$

Explanation:

length of the pendulum (L)= 1.15 m

Time period (T)= 6.29 seconds

We know that time period of a simple pendulum is given by

⇒ T = 2 $\pi$ × $\sqrt\frac{L}{g}$

put the values in the above formula we get

⇒ T = 2 $\pi$ × $\sqrt \frac{1.15}{g}$

⇒ 6.29 = 2 $\pi$ × $\sqrt \frac{1.15}{g}$

By solving the above equation we get

⇒ g = 1.14 $\frac{m}{s^{2} }$

This is the value of the acceleration of gravity of the Unknown Planet.

7 0

4 years ago

if a car engine does 600,000 J of work over a 500m distance and the mass of the car is 250Kg then what is the final velocity of

drek231 [11]

Given that

Work = 600,000 J ,

distance(S) = 500 m ,

mass (m) = 250 Kg ,

Determine the velocity of car (v) = ?

We know that,

Work = Force × distance

=> Force = Work ÷ distance

= 600,000 ÷ 500

= 500 N .

Also Force F = m.a ; from Newtons II law

500 = 250 × a

a = 2 m/s.

<em>Final Velocity from the given formula </em>

V² = u² + 2.a.s

= 0 + 2 × 2 × 500

= \sqrt{2000}

<em> v = 44.7 m/s</em>

8 0

3 years ago