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2 years ago

14

A suitcase is pulled feet along a flat sidewalk with a constant upward force of 80 lb at an angle of 23 with the horizontal. Cal

culate the work done.

1 answer:

Harlamova29_29 [7]2 years ago

5 0

Answer:

newtons 2nd law of motion

Step-by-step explanation:

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What is a synthetic material made of?

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Synthetic fibers are made from raw materials such as petroleum, based on chemicals or petrochemicals [20]. These materials are polymerized into a long, linear chemical with different chemical compounds and are used to produce various types of fibers.

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2 years ago

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The lifetime of two light bulbs are modeled as independent and exponential random variables X and Y, with parameters lambda and

Scorpion4ik [409]

Answer:

$\bf h(x)=max(\lambda,\mu) e^{-max(\lambda,\mu) x}\;(x\geq0)$

Step-by-step explanation:

The PDF of X is

$\bf f(x)=\lambda e^{-\lambda x}\;(x\geq0)$

The PDF of Y is

$\bf g(x)=\mu e^{-\mu x}\;(x\geq0)$

The means of X and Y are respectively,

$\bf \displaystyle\frac{1}{\lambda}\;,\displaystyle\frac{1}{\mu}$

so we can see that the larger the parameter, the smaller the mean. Hence the PDF of Z = min(X, Y) is an exponential with the largest parameter of the two.

Therefore, the PDF of Z is

$\bf h(x)=max(\lambda,\mu) e^{-max(\lambda,\mu) x}\;(x\geq0)$

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2 years ago

Tanya walked for 17 minutes from her home to a friend that lives 1.5 kilometers away . d(t) models Tanya's remaining distance to

andrey2020 [161]

Answer:

Real numbers

0≤ t ≤17

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2 years ago

How can you determine whether salt water is a solution or a compound?

saul85 [17]

Answer:

In the comments

Step-by-step explanation:

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2 years ago

5 men take 45hours to build a wall.how long will it take 9men working at the same wall?

Karolina [17]

Answer:

<u>25 hours</u>

Step-by-step explanation:

It takes 5 men 45 hours to build a wall.

So, if no. of men increases by 1.8 [∴ 5 x 1.8 = 9],

then time taken reduces by that same amount.

=> 45 hours / 1.8

=> 45 / (9/5)

=> 45 x 5 / 9

=> 5 x 5

=> <u>25 hours</u>

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2 years ago