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3 years ago

Explain why is not advisable to use small values of I in performing an experiment on refraction through a glass prism?

Physics

1 answer:

MakcuM [25]3 years ago

3 0

The angle of refraction would be further less

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What is the potential difference across one wire of a 70 m extension cord made of 16 gauge copper wire carrying a current of 4 A

Butoxors [25]

Answer:

V = 3.6 volts

Explanation:

From Ohm's Law, we know that:

V = IR

but,

R = ρL/A

Therefore,

V = IρL/A

where,

V = Potential Difference = ?

I = Current = 4 A

ρ = resistivity of copper = 1.68 x 10⁻⁸ Ω.m

L = Length = 70 m

A = Cross-sectional Area = πd²/4 = π(1.29 x 10⁻³ m)²/4 [16 gauge wire has a diameter of 1.29 mm]

A = 1.31 x 10⁻⁶ m²

V = (4 A)(1.68 x 10⁻⁸ Ω.m)(70 m)/(1.31 x 10⁻⁶ m²)

<u>V = 3.6 volts</u>

3 0

3 years ago

If your car tachometer says your engine is moving at 1200 RPM, then what is it's angular velocity in Rad/sec?

Ostrovityanka [42]

Answer:

125.66 R/s

Explanation:

First 1200 r / min = 20 r/sec

20 r/s * 2pi Radians / r = 40 pi Radians / sec = 125.66 R/s

3 0

2 years ago

What is the mass number of the isotope lithium-7?

NNADVOKAT [17]

<span>the answer is 7...What is the mass number of the isotope lithium-7? the mass of isotope lithium-7 is 7. </span>

5 0

3 years ago

Read 2 more answers

The kinetic energy and the potential energy of the cannonball is constantly ________ as it travels through the air.

enot [183]

Answer:

C. Constant

Explanation:

The total energy of the cannonball remains constant as it travels through the air.

4 0

3 years ago

An electron is confined in a harmonic oscillator potential well. What is the longest wavelength of light that the electron can a

kipiarov [429]

Answer:

The longest wavelength of light is 209 nm.

Explanation:

Given that,

Spring constant = 74 N/m

Mass of electron $m= 9.11\times10^{-31}\ kg$

Speed of light $c= 3\times10^{8}\ m/s$

We need to calculate the frequency

Using formula of frequency

$f =\dfrac{1}{2\pi}\sqrt{\dfrac{k}{m}}$

Where, k= spring constant

m = mass of the particle

Put the value into the formula

$f=\dfrac{1}{2\pi}\sqrt{\dfrac{74}{9.11\times10^{-31}}}$

$f=1.434\times10^{15}\ Hz$

We need to calculate the longest wavelength that the electron can absorb

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

Where, c = speed of light

f = frequency

Put the value into the formula

$\lambda =\dfrac{3\times10^{8}}{1.434\times10^{15}}$

$\lambda=2.092\times10^{-7}\ m$

$\lambda=209\ nm$

Hence, The longest wavelength of light is 209 nm.

6 0

3 years ago