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4 years ago

A driver can exceed the postage maximum speed limit in a work zone T or F?

Physics

1 answer:

PIT_PIT [208]4 years ago

6 0

That statement is physically and grammatically true but legally false.

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Did the strongman pull up or push down to lift the pig

fredd [130]

Answer:

pull up???????????????

7 0

3 years ago

A mass m is tied to an ideal spring with force constant k and rests on a frictionless surface. The mass moves along the x axis.

7nadin3 [17]

Answer: $x=\frac{x_m}{\sqrt{2}}$

Explanation:

Given

initially mass is stretched to $x_m$

Let k be the spring Constant of spring

Therefore Total Mechanical Energy is $\frac{kx_m^2}{2}$

Position at which kinetic Energy is equal to Elastic Potential Energy

$K=\frac{mv^2}{2}$

$U=\frac{kx^2}{2}$

it is given

$k=U$

thus $2U=\frac{kx_m^2}{2}$

$2\times \frac{kx^2}{2}=\frac{kx_m^2}{2}$

$2x^2=x_m^2$

$x=\frac{x_m}{\sqrt{2}}$

3 0

4 years ago

Des Linden won the Boston marathon in 2018, becoming the first American woman to win since 1985. The harsh conditions (heavy rai

ankoles [38]

Answer:

3050.6 Litre .

Explanation:

Total time of heart beat = Total time of race = 2 hrs , 39 minutes and 54 seconds

= 2 x 60 + 39 + 54/60 min

= 120 + 39 + .9 min

= 159.9 min

rate of heart beat = 170 per min

Total no of heart beat during race = 170 x 159.9

volume of blood per kg per beat = 2.5 mL per kg of weight

body weight = 99 pounds = .4535 x 99 kg = 44.89 kg

volume of blood per beat = 2.5 mL x 44.89 mL

= 112.225 mL .

Total required volume of blood = 112.225 x 170 x 159.9 mL

= 3050612 mL

= 3050.6 L.

6 0

3 years ago

The "Garbage Project" at the University of Arizona reports that the amount of paper discarded by households per week is normally

Lorico [155]

Answer:

54%

Explanation:

We are given that

S.D=4.2 lb

Mean= $\mu=9.4 lb$

We have to find the percentage of household throw out at least 9 lb of paper a week.

Normal distribution formula :

$P(X\geq a)=P(z\geq \frac{a-\mu}{\sigma})$

We have a=9

$P(X\geq 9)=P(z\geq \frac{9-9.4}{4.2})=P(z\geq -0.1)$

$P(X\geq 9)=1-P(z$

$P(X\geq 9)=1-0.4602=0.5398\times 100=54$ %

Hence, the percentage of household throw out at least of paper a week=54%

7 0

3 years ago

Which of the following statements is an example of weather?

liq [111]

It is 88 degrees in San Diego
Weather is the condition of the atmosphere at a particular place and time

5 0

4 years ago