An open system starts with 52 J of mechanical energy. The energy changes

An instructor wishes to determine the wavelength of the light in a laser beam. To do so, he directs the beam toward a partition

romanna [79]

Answer:

laser wavelength = 549.5 nm

Explanation:

Given data

separation d = 0.170 mm = 0.170 × $10^{-3}$ m

interference pattern distance D = 4.95 m

two adjacent bright interference width w = 1.60 cm = 1.60 × $10^{-2}$ m

to find out

laser's wavelength

solution

we know that fringe width formula that is

width = wavelength × distance / separation

we put all these value here to find wavelength

wavelength = 1.60 × $10^{-2}$ × 0.170 × $10^{-3}$ / 4.95

wavelength = 549.5 nm

so laser wavelength = 549.5 nm

5 0

3 years ago

An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 1760 1760 × 103 seconds (a

Katen [24]

Answer:

$a_c=6.471\frac{m}{s^{2}}$

Explanation:

We can calculate the magnitude of the tangential velocity of the moon, using the equation:

$v=\frac{2\pi R}{\tau}$

(This works, since velocity is defined as distance over time; in this case the distance is 2πR and the time is the period τ)

Next, from the equation of the centripetal acceleration we have:

$a_c=\frac{v^{2} }{R}\\\\a_c=\frac{4\pi^{2}R}{\tau^{2} }$

Be careful, the radius of the orbit R is equal to the distance from the center of the moon to the center of the planet. So we have to sum the distance from the center of the moon to the surface of the planet and the radius of the planet to obtain R:

$R=285.0*10^{6} m+3.50*10^{6} m=288.5*10^{6}m$

Finally, plugging the given values into the centripetal acceleration formula, we have:

$a_c=\frac{4(3.141)^{2}(288.5*10^{6}m)}{(1760*10^{3}s)^{2}} =6.471\frac{m}{s^{2}}$

In words, the moon's radial acceleration a_c is 6.471m/s².

3 0

3 years ago

Jason drives uphill from home to school, averaging 20 miles per hour. On the way back, he drives back downhill from school to ho

r-ruslan [8.4K]

Answer:

Average velocity = 30 miles per hour

Explanation:

Given that

Velocity for uphill = 20 miles per hour

Velocity for downhill = 60 miles per hour

We know that

Distance = Velocity x time

Total distance = Average velocity x total time

Lets take distance from home to school is s

Time taken from home to school= s/20 hr

Time taken from school to home= s/60 hr

Total time =s/20+s/60

Total distance = Average velocity x total time

s + s = Average velocity x (s/20+s/60)

So average velocity = 30 miles per hour

6 0

3 years ago

A car's momentum is p when it is traveling with velocity of v. if the velocity of that car doubled, what is the new momentum of

viva [34]

According to law of conservation of momentum... as p=m.v so as velocity v increases the momentum also increases in the direction of motion

4 0

3 years ago

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Which best explains the direction of the moving force of air?. . A.. from warm temperatures to cold temperatures. . B.. from are

borishaifa [10]

Out of the choices given, the best choice to explain the direction of the moving force of air is from area o high pressure to areas of low pressure. The correct answer is B.

8 0

3 years ago

Read 2 more answers