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mr Goodwill [35]

3 years ago

13

Red lights flash every 6 seconds. Blue lights flash every 8 seconds. The store owner turns on the lights. After how many seconds

will the lights flash at the same time for the first time

1 answer:

Morgarella [4.7K]3 years ago

8 0

In 24 seconds they will flash at the same time for the first time

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what is the lub and glb of the following sets, in the set of real numbe if exists E={ 0.2,0.23,0.234,0.2343,0.23434,0.23434,...}

Brums [2.3K]

Answer:

Hello,

Step-by-step explanation:

$LUB(E)=0.2=\dfrac{1}{5} \\\\GUB(E)=0.2 34 34 34 ....=0.2+\dfrac{1}{10} *0.343434....\\\\=\dfrac{1}{5} +\dfrac{1}{10} *\dfrac{34}{99} \\\\=\dfrac{198+34}{990} \\\\=\dfrac{116}{495}$

4 0

3 years ago

A homogeneous rectangular lamina has constant area density ρ. Find the moment of inertia of the lamina about one corner

frozen [14]

Answer:

$I_{corner} =\frac{\rho _{ab}}{3}(a^2+b^2)$

Step-by-step explanation:

By applying the concept of calculus;

the moment of inertia of the lamina about one corner $I_{corner}$ is:

$I_{corner} = \int\limits \int\limits_R (x^2+y^2) \rho d A \\ \\ I_{corner} = \int\limits^a_0\int\limits^b_0 \rho(x^2+y^2) dy dx$

where :

(a and b are the length and the breath of the rectangle respectively )

$I_{corner} = \rho \int\limits^a_0 {x^2y}+ \frac{y^3}{3} |^ {^ b}_{_0} \, dx$

$I_{corner} = \rho \int\limits^a_0 (bx^2 + \frac{b^3}{3})dx$

$I_{corner} = \rho [\frac{bx^3}{3}+ \frac{b^3x}{3}]^ {^ a} _{_0}$

$I_{corner} = \rho [\frac{a^3b}{3}+ \frac{ab^3}{3}]$

$I_{corner} =\frac{\rho _{ab}}{3}(a^2+b^2)$

Thus; the moment of inertia of the lamina about one corner is $I_{corner} =\frac{\rho _{ab}}{3}(a^2+b^2)$

7 0

3 years ago

The rate at which energy is used is called <br> work, voltage, power, or amperage.

SSSSS [86.1K]

Answer:

The rate at which energy is used is called power.

Step-by-step explanation:

5 0

3 years ago

MUST HELP!!!! (25 POINTS) +BRAINLEST +5 STARS +THANKS ON PROLFILE!!!!

MrMuchimi

Answer:

Enlargement Areas

Step-by-step explanation:

if you enlarge the little one, they will intersect each other perfectly because those triangles are similar and the same. they are just different sizes

hope this helps!

3 0

3 years ago

Whats the output if i square -6 as the input

nirvana33 [79]

Answer:

u mean:

$\sqrt{ - 6 \: } it \: can \: not \: work \: if \: negative \: integer \: inside \: so \: thats \: why \: answer \: would \: be \: not \: possible.$

answer is not possible.

7 0

3 years ago