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morpeh [17]
2 years ago
10

A music performance takes place in an enclosed arena. A person sitting a distance of 20.0 m from the speaker experiences a sound

intensity of 0.32 W/m2. What is the power of the speaker? (Assume that the area over which the speaker transmits sound is given by A = 4πd2, where d is the distance from the speaker.)
A.
100 W
B.
550 W
C.
1,200 W
D.
1,600 W
Chemistry
1 answer:
Flura [38]2 years ago
3 0
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Which product(s) would be obtained by the dehydration of 2-heptanol? of 2-methyl-l-cyclohexanol?
Komok [63]
Hello)
1)CH3-CH(OH)-СН2-СН2-СН2-СН2-СН3---(H2SO4)--›CH3-CH=CH-CH2-CH2-CH2-CH3+H2O
2)2-methyl-l-cyclohexanol---(h2so4)--›CH2=C(CH3)-CH2-CH2-CH2-CH2-CH3+H2O
5 0
3 years ago
3. Which of the following are missing from the food web shown below?
Vera_Pavlovna [14]
I assume that it is herring
5 0
3 years ago
g Determine the empirical formula for a compound that contains C, H and O. It contains 40.92% C, 4.58% H, and 54.50% O by mass.
Lady bird [3.3K]

Answer:

The empirical formula for the compound is C3H4O3

Explanation:

The following data were obtained from the question:

Carbon (C) = 40.92%

Hydrogen (H) = 4.58%

Oxygen (O) = 54.50%

The empirical formula for the compound can be obtained as follow:

C = 40.92%

H = 4.58%

O = 54.50%

Divide by their molar mass

C = 40.92/12 = 3.41

H = 4.58/1 = 4.58

O = 54.50/16 = 3.41

Divide by the smallest i.e 3.41

C = 3.41/3.41 = 1

H = 4.58/3.41 = 1.3

O = 3.41/3.41 = 1

Multiply through by 3 to express in whole number

C = 1 x 3 = 3

H = 1.3 x 3 = 4

O = 1 x 3 = 3

The empirical formula for the compound is C3H4O3

6 0
3 years ago
A hydraulic system is designed to lift cars for inspection in a service station. The narrow end of the system has a surface area
fiasKO [112]

<u>Given:</u>

Surface area at the narrow end, A1 = 5.00 cm2

Force applied at the narrow end, F1 = 81.0 N

Surface area at the wide end, A2 = 725 cm2

<u>To determine:</u>

Force F2 applied at the wide end

<u>Explanation:</u>

Use the relation

F1/A1 = F2/A2

F2 = F1*A2/A1 = 81.0 N * 725 cm2/5.00 cm2 = 11,745 N

Ans: (b)

The force applied at the wide end = 11,745 N

5 0
3 years ago
Read 2 more answers
Really need help with the rest of them, please it's due in 20 minutes
ArbitrLikvidat [17]

Answer:

chlorine is for pool

Explanation:

hope is help

8 0
3 years ago
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