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inna [77]
4 years ago
10

A set is any collection of objects. true or false.

Physics
1 answer:
Semenov [28]4 years ago
3 0
It can be, but set also means many other things.
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A ray of laser light strikes a glass surface at an angle a=25.0° tot he normal and it is refracted to an angle b=18.5° to the no
USPshnik [31]

Answer:

1.33

Explanation:

According to snell's law,

n = sin(a)/sin(b)

Given

a = 25.0°

b = 18.5°

Substitute

n = sin25/sin18.5

n = 0.4226/0.3173

n = 1.33

Hence the index of refraction nb for this type of glass is 1.33

3 0
3 years ago
In the demolition of an old building, a 1,300 kg wrecking ball hits the building at 1.07 m/s2
goldfiish [28.3K]

Answer:

4

Explanation:

TRUST ME AND I AM SORRY IF RONG

5 0
3 years ago
Heat transfer from the Sun to the Moon is mostly through the process of *
boyakko [2]

radiation since the suns rays are ultraviolet which is a form of radiation

7 0
3 years ago
Read 2 more answers
If the emf of the battery is 12 v and each resistance is 4 ω, what power is consumed by bulb b?
dlinn [17]
P = V^2/R
= 144/4
= 36 watts
6 0
4 years ago
A computer is purchased for $2816 and depreciates at a constant rate to $0 in 8 years. Find a formula for the value, V , of the
marusya05 [52]

Answer:

  • The formula its f(t) \ = \ - \ 352 \ \frac{\$ }{years} \ t \ + \ \$ \ 2816
  • After 5 years, the computer value its $ 1056

Explanation:

<h3>Obtaining the formula</h3>

We wish to find a formula that

  • Starts at 2816. f(0 \ years) \ = \ \$ \ 2816
  • Reach 0 at 8 years. f( 8 \ years) \ = \ \$ \ 0
  • Depreciates at a constant rate. m

We can cover all this requisites with a straight-line equation. (an straigh-line its the only curve that has a constant rate of change) :

f(t) \ = \ m\ t \ + \ b,

where m its the slope of the line and b give the place where the line intercepts the <em>y</em> axis.

So, we can use this formula with the data from our problem. For the first condition:

f ( 0 \ years ) = m \ (0 \ years) + b = \$ \ 2816

b = \$ \ 2816

So, b = $ 2816.

Now, for the second condition:

f ( 8 \ years ) = m \ (8 \ years) + \$ \ 2816 = \$ \ 0

m \ (8 \ years) = \ - \$ \ 2816

m = \frac{\ - \$ \ 2816}{8 \ years}

m = \frac{\ - \$ \ 2816}{8 \ years}

m = \ - \ 352 \frac{\$ }{years}

So, our formula, finally, its:

f(t) \ = \ - \ 352 \ \frac{\$ }{years} \ t \ + \ \$ \ 2816

<h3>After 5 years</h3>

Now, we just use <em>t = 5 years</em> in our formula

f(5 \ years) \ = \ - \ 352 \ \frac{\$ }{years} \ 5 \ years \ + \ \$ \ 2816

f(5 \ years) \ = \ - \$ \ 1760 + \ \$ \ 2816

f(5 \ years) \ = $ \ 1056

4 0
4 years ago
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