All categories

2 years ago

What what is the direction of an object’s acceleration if it is being pulled upward by a rope at a constant speed?

Physics

1 answer:

Arada [10]2 years ago

7 0

Answer:

the direction is towards upward.i think.

You might be interested in

Enrico Fermi (1901–1954) was a famous physicist who liked to pose what are now known as Fermi problems, in which several assumpt

Katarina [22]

Answer:

Explanation:

(a)

Since the earth is assumed to be a sphere.

Volume of atmosphere = volume of (earth +atm osphere) — volume of earth

$= \frac{4}{3}\pi(6400+ 50)^3 - \frac{4}{3}\pi (6400)
^3\\\\= \frac{4}{3}\pi(6192125000) km’^3\\= 2.6\times 10^{19} m^3$

Hence the volume of atmosphere is $2.6\times 10^{19} m^3$

(b)

Write the ideal gas equation as foll ows:

$PV = nRT\\\\n\frac{0.20atm\times 2.6\times10^{19} m^3}{0.08206L\, atm/mok\, K \times (15+273+15)K}\times \frac{1L}{10^{-3}m^3}\\\\= 2.20\times 10^{20} moles$

$no.\, of\, molecules = 2.20\times 10^{20} moles \times \frac{6.022\times10^{23}\,molecules}{1mole}= 13.3\times10^{43} molecules
$

Hence the required molecules is $13.3\times10^{43} molecules
$

(c)

Write the ideal gas equation as follows:

$PV =nRT
\\\\n=\frac{1.0 atm \times 0.5L
}{0.08206 L\, atm/mol\,K \times (37 +273.1 5)K} = 0.0196 moles$

$no.\, of\, molecules = 0.0196 moles \times\frac{6.022\times10^{23} molecules}
{Imole}= 1.2\times 10^{23} molecules$

Hence the required molecules in Caesar breath is $1.2\times 10^{23} molecules$

(d)

Volume fraction in Caesar last breath is as follows:

$Fraction,\, X =\frac{12\times 10 molecules}{13.3\times 10^{43} \,molecules}= 9.0\times 10\, molecule/air\, molecule}$

(e)

Since the volume capacity of the human body is 500 mL.

$Volume\, of\, Caesar\, nreath\, inhale\, is =\frac{ 12\times 10^{22}\, molecules}{breath}\times \frac{9.0\times10^{-23} molecule}{air\, molecule}\\\\= 1.08 molecule/breath$

5 0

2 years ago

An archer pulls back the string of a bow to release an arrow at a target. Which kind of potential energy is transformed to cause

Morgarella [4.7K]

It is elastic energy

8 0

2 years ago

Read 2 more answers

What is the reaction time

Yanka [14]

Answer:

<h2>"Mental chronometry"</h2>

Explanation:

<h3>Reaction time is a measure of how quickly an organism can respond to a particular stimulus. ... Many factors have been shown to affect reaction times, including age, gender, physical fitness, fatigue, distraction, alcohol, personality type, and whether the stimulus is auditory or visual.</h3><h3>"Hope this is fine for you"</h3>

4 0

2 years ago

Read 2 more answers

A dog that is soaking wet will typically shake its body rapidly to remove water from its fur. Which of the following is the best

Wewaii [24]

The dog shakes to get the water off of him and to get dry. These fast movements replicate when we drain the water out of our hair and when we blow dry our hair.

8 0

3 years ago

Read 2 more answers

Need help with Physics. 100 points + Brainliest

kiruha [24]

Answer:

I wrote down the answer and attached it below.

Explanation:

Hope this Helps!!!!

⬇⬇⬇⬇⬇⬇⬇⬇

8 0

2 years ago

Read 2 more answers