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3 years ago

5. Which of the following is NOT a course goal?

Physics

1 answer:

kifflom [539]3 years ago

3 0

Answer:

for students to do nothing

Explanation:

because doing nothing is not a course goal

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If our eyes could see a slightly wider region of the electromagnetic spectrum, we would see a fifth line in the Balmer series em

melamori03 [73]

Answer:

λ = 397 nm

Explanation:

given,

Rydberg wavelength equation for Balmer series

$\dfrac{1}{\lambda}=R(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})$

R is the Rydberg constant, R = 1.097 x 10⁷ m⁻¹

n_i = initial energy level

n_f = final energy level

where as for Balmer series n_f = 2

n_i = 7

$\dfrac{1}{\lambda}=(1.097\times 10^7)(\dfrac{1}{2^2}-\dfrac{1}{7^2})$

$\dfrac{1}{\lambda}=2.5186\times 10^6$

$\lambda = 3.97\times 10^{-7}$

Hence, the wavelength is equal to λ = 397 nm

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3 years ago

X-rays are used instead of visible light because X-rays have shorter ______________ than visible light, allowing them to produce

pashok25 [27]

The answer is wavelengths.

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3 years ago

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I need help on this question.

stira [4]

Answer:

<em>Answer: B. 49 N</em>

Explanation:

<u>Friction Force </u>

When an object is at rest on a rough surface, it encounters a friction force that opposes motion.

The friction force when an object is moving on a horizontal surface is calculated by:

$Fr=\mu_k N$

Where $\mu_k$ is the coefficient of static friction and N is the normal force.

If no forces other then the weight and the normal are acting upon the y-direction, then the weight and the normal are equal in magnitude:

N = W = m.g

Thus, the friction force is:

$Fr=\mu_k W$

We are given the coefficient of static friction $\mu_k=0.5$ and the mass of the object m=10 Kg. The minimum force needed to make it start moving is the maximum friction force:

Fr=0.5*10*9.8

Fr = 49 N

Answer: B. 49 N

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3 years ago

What happens when your wearing socks and you shuffle across a carpet then touch a door knob?

natali 33 [55]

Answer:

You build up kinetic energy and you get shocked this happens because static has built up from the socks and the rug. This also happens when you rub a balloon on your head or shuffle across a trampoline with socks on.

Explanation:

brainliest plz

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3 years ago

What is star wars 1313

Vinvika [58]

star wars 1313 is a cancelled video game ( action / adventure ) that was under development by lucas arts.

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