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laiz [17]
2 years ago
12

What would happen to the apparent change in mass if the direction of the current is reversed?

Physics
1 answer:
pantera1 [17]2 years ago
8 0
When you reverse the direction of the current, the current loop generated by the magentic field is revered.
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A carbon-dioxide laser emits infrared light with a wavelength of 10.6 μm. What is the length of a tube that will oscillate in th
alex41 [277]

Answer:

The length of a tube and number of rounds are 0.848 m and 1.77\times10^{8}\ trip\ per\ second.

Explanation:

Given that,

Wavelength \lambda= 10.6\mu m

m = 160000

We need to calculate the length

Using formula of wavelength

Laser tube behave like closed pipe

m\dfrac{\lambda}{2}=L

L=160000\times\dfrac{10.6\times10^{-6}}{2}

L=0.848\ m

Distance traveled by pulse of light in one back and fourth trip

d=2L

d=2\times0.848

d=1.696\ m

We need to calculate the time

Using formula for time

t = \dfrac{d}{c}

t=\dfrac{1.696}{3\times10^{8}}

t=5.653\times10^{-9}\ s

We need to calculate the number of round

Using formula of number of round

N=\dfrac{1}{t}

N= \dfrac{1}{5.653\times10^{-9}}

N=1.77\times10^{8}\ trip\ per\ second

Hence, The length of a tube and number of rounds are 0.848 m and 1.77\times10^{8}\ trip\ per\ second.

7 0
2 years ago
The index of refraction for silicate flint glass is 1.66 for violet light that has a wavelength in air equal to 400 nm and 1.61
nikitadnepr [17]

Answer:

(a) Angle of incidence for violet is more than the angle of incidence for red

(b) 2.4°

Explanation:

refractive index for violet , v = 1.66

refractive index for red, nR = 1.61

wavelength for violet, λv = 400 nm

wavelength for red, λR = 700 nm

Angle of refraction, r = 30°

(a) Let iv be the angle of incidence for violet.

Use Snell,s law

nv = Sin iv / Sin r

1.66 = Sin iv / Sin 30

Sin iv = 0.83

iv = 56°

Use Snell's law for red

nR  = Sin iR / Sin r  

where, iR be the angle of incidence for red

1.61 = Sin iR / Sin 30

Sin iR = 0.805

iR = 53.6°

So, the angle of incidence for violet is more than red.

(b) iv - iR = 56° - 53.6° = 2.4°

4 0
2 years ago
A kite is 100m above the ground. If there are 200m of string out, what is the angle between the string and the horizontal? (Assu
belka [17]

Answer:

the answer is 30°

Explanation:

due to:

sin law of sines

\frac{sin 90}{200} =\frac{sin\beta }{100}\\arcsin(100\frac{sin90}{200} )= 30°

3 0
2 years ago
A 4-N object object swings on the end of a string as a simple pendulum. At the bottom of the swing, the tension in the string is
Amanda [17]

Answer:

Explanation:

Given mg = 4N .

m = 4 / g

At the bottom of the swing let centripetal acceleration be a

T - mg = ma

9 - 4 = ma

5 = 4 a  / g

a =  5g / 4

6 0
2 years ago
A quarterback throws a football at 40km/hr to a receiver 50yd away. How much time does it take the ball to reach the receiver
Akimi4 [234]

Given:

Distance = 50 yard = 45.72 meter

Speed = 40 km/hr = 11.11 m/s

To find:

Time required by ball to reach the receiver = ?

Formula used:

speed = \frac{distance}{time}

Solution:

The speed of the ball is given by,

speed = \frac{distance}{time}

Thus,

Time = \frac{distance}{speed}

Distance = 50 yard = 45.72 meter

Speed = 40 km/hr = 11.11 m/s

Time = 4.12 second

Hence, ball reaches the receiver in 4.12 second.

3 0
2 years ago
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