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2 years ago

16.

Physics

1 answer:

Sholpan [36]2 years ago

4 0

Answer:

doing her homework/finding time to do important things

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Which part of atoms will form an ionic compound?

JulijaS [17]

Valance electrons. Jdjdjsncienciemi (sorry had to make it longer)

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2 years ago

A police car drives 100 miles in 75 minutes. What is its average speed in miles per hour?

Y_Kistochka [10]

Its average speed is 80 miles per hour because 75 minutes=1.25 hours, and the police car travels 80 miles in 1.25 hours, so I just need to take 100 divided 1.25 equal 80. As a result, the police car travels 80 miles in one hour. Hope it help!

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3 years ago

What is the difference between living, nonliving, and dead

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Living means something which biologically active, and can function naturally.

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Dead is something that was living for a certain period, but now it doesn't.

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2 years ago

A 5kg box slides across the floor with an initial velocity of 5m/s. If the coefficient of kinetic friction between the box and t

4vir4ik [10]

The net force on the block perpendicular to the floor is

∑ F[perp] = F[normal] - mg = 0

so that

F[normal] = (5 kg) g = 49 N

Then

F[friction] = 0.1 F[normal] = 4.9 N

so that the net force parallel to the floor is

∑ F[para] = -4.9 N = (5 kg) a

Solve for the acceleration a :

a = (-4.9 N) / (5 kg) = -0.98 m/s²

Starting with an initial velocity of 5 m/s, the box comes to a stop after time t such that

0 = 5 m/s - (0.98 m/s²) t

⇒ t ≈ 5.1 s

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1 year ago

A. Blue light has higher energy than red light. Write 3 - 4 sentences comparing these electromagnetic waves with respect to the

frosja888 [35]

PART A)

As we know that energy of light depends on its wavelength and frequency as following formula

$E = \frac{hc}{\lambda} = h\nu$

now we know that wavelength of blue light is less than the red light so here energy of blue light will be more

also we know that

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

so here if wavelength is smaller for blue light so its frequency will be high and the speed of both light will be same in same medium

PART B)

Since we know that frequency of blue light is more than red light as well as wavelength of blue light is less than the wavelength of blue light so here blue light will have more energy

When blue light and red light strike the metal surface then due to more energy of blue light it will release some loosely bonded electrons from metal surface which will contribute in current.

here if we increase the intensity of light then the number of photons that contain the blue light of certain energy will be more and that will contribute more current

So here quantification help as we know that due to quantization only certain frequency or energy will lead to eject electron so all colours will not give this current

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2 years ago

Read 2 more answers