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noname [10]
3 years ago
14

Please help, dont understand

Mathematics
1 answer:
Artemon [7]3 years ago
3 0

Answer:

D

Step-by-step explanation:

D because it is always true

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A car travels at a speed of 64 km/h. Find the distance travelled in 4½ hours. ​
nordsb [41]
Answer: 160m

Explanation: I hope this helps <3
6 0
3 years ago
One mole of iron (6 × 1023 atoms) has a mass of 56 grams, and its density is 7.87 grams per cubic centimeter, so the center-to-c
MrMuchimi

Answer:

a) k_{s} = 3.6 N/m ; b) 9.43 * 10¹²; c) 1.18 * 10¹¹; d) 75.08 N/m

Step-by-step explanation:

Length of iron bar = L = 2.7m;

side length of cross section = a = 0.07cm = 0.0007m;

x = 2.7 cm = 0.027m;

m = 100kg;

ρ = 7.87gm/cm³;

da = 2.28 * 10⁻¹⁰m;

a)

Fnet = F - mg

where Fnet = 0

So,

F = mg where F=k_{s}x

k_{s} = mg/x = 100*9.8/0.027

k_{s} = 3.6 N/m

b)

Nchain = Aw/Aa =a²/(da)²

                           = (o.ooo7)²/(2.28 * 10⁻¹⁰)²

                           = 9.43 * 10¹²

c)

Nbond = L/da = 2.7/2.28 * 10⁻¹⁰

                       = 1.18 * 10¹¹

d)

Spring stiffness of wire = ksi = (Nbondk_{s})/Nchain

                                      = [(1.18* 10¹¹)(6*10⁴)]/(9.43 * 10¹²)

                                      = 75.08 N/m

8 0
3 years ago
.5n-9=4n+5 pls i need help
Oksana_A [137]
Hi there,

5n - 9 + 4n + 5
5n - 4n = 5 + 9

Hence,   N = 14

Hope this helps :)
3 0
3 years ago
WILL GIVEBRALIST TO FIRST ONE
torisob [31]
Rectangle explanation:I’m doing the same thing
3 0
3 years ago
Read 2 more answers
Select all that apply:
Anon25 [30]

Answer: The expression has 3 terms

The expression represents the sum of 9z,4y, and 3x

The expression represents y multiplied by 4 plus x multiplied by 3 plus z multiplied by 9

The second term has a coefficient of 4

Step-by-step explanation:

5 0
3 years ago
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