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3 years ago

The mass in a pendulum clock completes one complete swing in 1.00 s . what is the length of the rod?

1 answer:

3 0

The period of oscillation of a pendulum is
$T=2 \pi \sqrt{ \frac{L}{g} }$
Where L is the length of the pendulum and $g=9.81 m/s^2$ the gravitational acceleration.
Re-arranging the formula and using T=1.0 s, we find the length of the pendulum:
$L= \frac{T^2g}{4 \pi^2}=0.25 m$

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Hello Brainly Teacher Brainly Moderators and trusted helpers!

tatyana61 [14]

Answer:

P(x < 84) = 0.3085 or approximately 31%

============

<em>Hello to you from Brainly team!</em>

<h3>Given</h3>

Mean grade μ = 86,
Standard deviation σ = 4,
Grade limit x = 84.

Probability of that a randomly selected grade is less than 84 or P(x < 84).

<h3>Solution</h3>

Find z-score using relevant equation:

z = (x - μ)/σ

Substitute values and calculate:

z = (84 - 86)/4 = - 0.5

Using the z-score table find the corresponding P- value.

P(x < 84) = 0.30854 or approximately 31%

4 0

2 years ago

What is the slope of graph Pls Help

Zielflug [23.3K]

Answer:

The slope is 1/2

i believe

Step-by-step explanation:

Use the rise/run method

7 0

3 years ago

Y= x^2-4x+3 in vertex form

Karolina [17]

Answer:

$y=(x-2)^2-1$

Step-by-step explanation:

<u>Complete the square</u>

<u /> $y=x^2-4x+3\\\\y+1=x^2-4x+3+1\\\\y+1=x^2-4x+4\\\\y+1=(x-2)^2\\\\y=(x-2)^2-1$

4 0

2 years ago

Solve each system by substitution.<br> 5) 5x + 3y =-23<br> y = 4

docker41 [41]

Answer:

(- 7, 4 )

Step-by-step explanation:

Given the 2 equations

5x + 3y = - 23 → (1)

y = 4 → (2)

Substitute y = 4 directly into (1_

5x + 3(4) = - 23, that is

5x + 12 = - 23 ( subtract 12 from both sides )

5x = - 35 ( divide both sides by 5 )

x = - 7

Solution is (- 7, 4 )

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3 years ago

Which is a true statement? A. -15 > -5 B. -4 > 0 C. -12 < -3 D. 2 < -5

Svet_ta [14]

The true statement is C -12 < -3

6 0

4 years ago

Read 2 more answers