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3 years ago

PLEASE HELP !!

Physics

1 answer:

Naily [24]3 years ago

4 0

Answer:

Two orbitals for their electrons and six in the 2p subshell

Explanation:

Hope this helps :)

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A snail slowly travels down the sidewalk at a pace of 4 cm/s. how long will it take the snail to reach a distance of 20 cm?

egoroff_w [7]

It’s gonna take it 5 cm to reach the distance

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4 years ago

Plain electromagnetic wave (in air) has a frequency of 1 MHz and its B-field amplitude is 9 nT a. What is the wavelength in air?

Norma-Jean [14]

Answer:

Part a)

$\lambda = 300 m$

Part b)

$E = 2.7 N/C$

Part c)

$I = 9.68 \times 10^{-3} W/m^2$

$P = 3.22 \times 10^{-11} N/m^2$

Explanation:

Part a)

As we know that frequency = 1 MHz

speed of electromagnetic wave is same as speed of light

So the wavelength is given as

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

$\lambda = \frac{3\times 10^8}{1\times 10^6}$

$\lambda = 300 m$

Part b)

As we know the relation between electric field and magnetic field

$E = Bc$

$E = (9 \times 10^{-9})(3\times 10^8)$

$E = 2.7 N/C$

Part c)

Intensity of wave is given as

$I = \frac{1}{2}\epsilon_0E^2c$

$I = \frac{1}{2}(8.85 \times 10^{-12})(2.7)^2(3\times 10^8)$

$I = 9.68 \times 10^{-3} W/m^2$

Pressure is defined as ratio of intensity and speed

$P = \frac{I}{c} = \frac{9.68\times 10^{-3}}{3\times 10^8}$

$P = 3.22 \times 10^{-11} N/m^2$

6 0

3 years ago

Reaction of sodium,lithium and potassium will be demonstrated by your instructor. why are students not allowed to handle these e

aev [14]

They are highly reactive and can explode when not handled properly

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3 years ago

fomenos

Answer:

The correct option is;

(A) 1 m/s

Explanation:

Given that Ramu and Somu are running towards North with 3 m/s and 4 m/s respectively.

Their friend Srinu is running towards South with a speed of 2 m/s

The magnitude of the relative velocity of Ramu with respect to Ramu is found as follows;

Velocity of Ramu = 3 m/s North ↑

Velocity of Srinu = 2 m/s South↓ = -2 m/s North ↑

Relative velocity of Ramu to Srinu = Velocity of Ramu North + Velocity of Srinu North

Relative velocity of Ramu to Srinu = 3 m/s + (-2) m/s = (3 - 2) m/s = 1 m/s

Relative velocity of Ramu to Srinu = 1 m/s.

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4 years ago

Where do babies come from

masha68 [24]

Female when sperm for males enters the egg of a female or "sex"

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3 years ago

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