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2 years ago

A 10 cm long rectangular bar (when subjected to a tensile load) deforms by 0.1 mm. calculate the normal strain.

1 answer:

6 0

The strain is the ratio of the deflection (change in dimensions) to the original dimensions.

SO:

strain = 0.1 mm / (10*10 mm) = 0.1 %

Take care of the unit..... you must use the same units.

and as it <span>a tensile load, so the strain would be positive (+ 0.1 %)</span>

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Suppose students' ages follow a skewed right distribution with a mean of 24 years old and a standard deviation of 3 years. If we

natta225 [31]

Answer: Option 'c' is correct.

Step-by-step explanation:

Since we have given that

Mean of students' age = 24 years

Standard deviation of students' age = 3 years

Sample size = number of students = 350

So, according to options,

a. The shape of the sampling distribution is approximately normal.

It is true as n >30, we will use normal.

b. The mean of the sampling distribution is approximately 24-years old.

It is true as it is given.

c. The standard deviation of the sampling distribution is equal to 5 years.

It is not true as it is given 3 years.

Hence, Option 'c' is correct.

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2 years ago

A coat at a store is originally priced at 54.99.The store marks the price down to 32.99.To the nearest percent ,what is the perc

AnnZ [28]

For this case what we can do is the following rule of three:
54.99 ------> 100%
32.99 ------> x
We clear the value of
x = (32.99 / 54.99) * (100)
x = 59.99272595
Therefore, the discount percentage is:
100-59.99272595 = 40.00727405%
To the nearest percent;
40%
Answer:
The percent markdown of the coat is:
40%

7 0

2 years ago

A restaurant sells 1,725 pounds of spaghetti and 925 pounds of linguini every month. After 9 months, how many pounds of pasta do

VladimirAG [237]

Situation: A restaurant sells 1 725 pounds of spaghetti and 925 pounds of linguini every months. Problem : Find the number of pounds of pasta does the restaurant sell in 9 months. => Pasta is also known as the sphaghetti. And since the restaurant sells 1 725 pounds every month, simply multiply this number by 9 to get the total amount of pounds in 9 months. => 1 725 * 9 = 15 525 pounds in 9 months.

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2 years ago

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A sailor is looking at a kite. If he is looking at the kite at an angle of elevation of 36and the distance from the boat to the

Nonamiya [84]

Answer:

Height of the kite from the ground is 29.2 feet.

Step-by-step explanation:

For better explanation of the solution, see the figure attached :

The angle formed by the height of kite to that of the surface of the ground is right angle.

⇒ m∠ABC = 90°

Let angle of elevation be θ

Now, to find height of the kite : find length of AB

In right angled triangle ABC , using tan rule, we have $\tan\theta=\frac{Perpendicular}{Base}\\\\\tan36^{\circ}=\frac{AB}{BC}\\\\\implies \tan36^{\circ}=\frac{AB}{40}\\\\\implies AB=0.73\times 40\\\\\bf\implies AB=29.2\thinspace{ feet}$

Hence, Height of the kite from the ground is 29.2 feet.

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2 years ago

12 less than m is no less than 132

kaheart [24]

Answer

M-12=-132

The less than moves the number to the back

3 0

2 years ago

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