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4 years ago

Describe a situation in which gravity causes a change in velocity

1 answer:

5 0

That's what happens whenever anything is dropped or falls.
-- a roller coaster leaves the top of a hill
-- a pencil rolls off the desk
-- the cat jumps off the top of the refrigerator
-- the little boy slides down the slide

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A piano, violin, or guitar uses the resonance of a wooden soundboard to

Nimfa-mama [501]

You're correct its A

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3 years ago

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A diffraction grating is made up of slits of width = 340 nm with separation = 790 nm. The grating is illuminated by monchromatic

nika2105 [10]

Answer:

angular width is 0.10 degree

Explanation:

Given data

width = 340 nm

separation d = 790 nm

λ = 520 nm

to find out

how many maxima and width of a spectral line

solution

we know for maxima formula is

m λ = dsinθ

and we know here sinθ is between 0 and 1

so we can say

d is greater than m λ

and

m ≤ d / λ

m ≤ 790 / 520

m ≤ 1.52

its mean we have 3 maxima i.e. 0 , 1 and -1

and

for 1st order m = 1

so mλ = dsinθ

λ = dsinθ

θ = sin^-1 ( λ/d) ................................1

and angular width is

θ = λ/ Nd cosθ

θ = dsinθ / Nd cosθ

θ = tanθ /N ...............................2

so here put θ in 2 equation

angular width = tanθ/N

angular width = tan ( sin^-1 ( 520/790) ) / 500

angular width = tan 41.16 / 500

angular width = 1.7484 × $10^{-3}$ × 180/π

angular width = 0.10 degree

3 0

3 years ago

Davien and Jackson are headed to a beach that is 50km from school. At noon, Davien leaves his house that is 10 km closer to the

snow_tiger [21]

Distance between Davien's school and beach, D = 50 km.

Also, Davian's house is 10 km closer to the beach than the school.

So, distance between Davien's house and beach, d = 40 km.

Speed of Davian, s = 40 km/h.

Now, time taken is given by :

$t =\dfrac{Distance}{Speed}\\\\t=\dfrac{40}{40}=1\ hour$

Therefore, Davien reach the beach at 1 : 30 P.M .

Hence, this is the required solution.

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3 years ago

According to the law of conservation of energy,

vova2212 [387]

Explanation:

energy cannot be created or destroyed, but only changed from one form to another or transferred from one object to another.

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4 years ago

A carnot cycle engine operates between a low temperature reservoir at 20°c and a high temperature reservoir at 800°c. if the eng

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3 years ago