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3 years ago

You arrive in my class 45 seconds after leaving math which is 90 meters away. How fast did you travel?

Physics

1 answer:

pashok25 [27]3 years ago

4 0

Answer:

2m/s

Explanation:

speed = distance÷time

speed =90÷45=2m/s

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The alpha line in the balmer series of the hydrogen spectrum consists of light having a wavelength of 6.56. calculate the freque

guajiro [1.7K]

The alpha line in the Balmer series is the transition from n=3 to n=2 and with the wavelength of λ=656 nm = 6.56*10^-7 m. To get the frequency we need the formula: v=λ*f where v is the speed of light, λ is the wavelength and f is the frequency, or c=λ*f. c=3*10^8 m/s. To get the frequency: f=c/λ. Now we input the numbers: f=(3*10^8)/(6.56*10^-7)=4.57*10^14 Hz. So the frequency of the light from alpha line is f= 4.57*10^14 Hz.

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3 years ago

As speed (velocity) increases, potential energy increases true or false

Lyrx [107]

Answer:

true

Explanation:

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3 years ago

The talk test can be used to measure the __________. A. knowledge of an activity B. intensity of an activity C. length of an act

marta [7]

Answer:

Explanation:

According to CDC, if you’re doing moderate-intensity activity, you can talk but not sing during the activity.

8 0

3 years ago

Read 2 more answers

Which equation shows the beta decay of a transuranium element?

kicyunya [14]

239 239 0

Np → Pu + e

93 94 -1 is the equation shows the beta decay of a transuranium element.

<h3>What is a Transuranium element?</h3>

These are elements whose atomic number is greater than that of uranium which is 92.

Neptunio has an atomic number of 93 which is why option D was chosen as the most appropriate choice.

Read more about beta decay here brainly.com/question/12448836

#SPJ1

5 0

2 years ago

Bartek w czasie 2minut przesunął ruchem jednostajnym kamień na odległość 0,5m.Oblicz moc mięśni Bartka jeśli siła oporów wynsiła

Ipatiy [6.2K]

Answer:

Bartek's muscle power = 2.667 W

Moc mięśni Bartka = 2.667 W

Explanation:

English Translation

Bartek within 2 minutes moved the stone

steadily at a distance of 0.5 m. Calculate Bartek's muscle power , if the resistance force was 640N.

The power, P, expended or generated by moving a body to move a velocity, v, against a resistive force, F is given as

P = Fv

P = ?

F = 640 N

v = velocity = (0.5) ÷ (2×60) = 0.00416667 m/s

P = 640 × 0.0041666667 = 2.667 W

In Polish/Po polsku

Moc P, zużyta lub wytworzona przez poruszanie ciałem w celu przemieszczenia prędkości v przeciwko sile oporowej, F jest podawana jako

P = Fv

P = ?

F = 640 N

v = velocity = (0.5) ÷ (2×60) = 0.00416667 m/s

P = 640 × 0.0041666667 = 2.667 W

Hope this Helps!!!

Mam nadzieję że to pomoże!!

4 0

3 years ago