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astraxan [27]
3 years ago
12

How is elastic potential energy stored and released in the elastic cord or spring in it is sun lounger

Physics
1 answer:
mart [117]3 years ago
6 0

Answer:

the answer  is bts

Explanation:

3erdccdcwdcefdvefvwefwedc3rv3rv3vrecwscx

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A weather balloon is designed to expand to a maximum radius of 24 m at its working altitude, where the air pressure is 0.030 atm
nlexa [21]

Answer:

<em>Radius at liftoff 8.98 m</em>

Explanation:

At the working altitude;

maximum radius = 24 m

air pressure = 0.030 atm

air temperature = 200 K

At liftoff;

temperature = 349 K

pressure = 1 atm

radius = ?

<em>First, we assume balloon is spherical in nature,</em>

<em>and that the working gas obeys the gas laws.</em>

from the radius, we can find the volume of the balloon at working atmosphere.

Volume of a sphere = \frac{4}{3} \pi r^{3}

volume of balloon = \frac{4}{3} x 3.142 x 24^{3} = 57913.34 m^3

using the gas equation,

\frac{P1V1}{T1} = \frac{P2V2}{T2}

<em>The subscript 1 indicates the properties of the gas at working altitude, and the subscript 2 indicates properties of the gas at liftoff.</em>

imputing values, we have

\frac{0.03*57913.34}{200} = \frac{1*V2}{349}

0.03 x 57913.34 x 349 = 200V2

V2 = 606352.67/200 = <em>3031.76 m^3  this is the volume occupied by the gas in the balloon at liftoff.</em>

from the formula volume of a sphere,

V =  \frac{4}{3} \pi r^{3} =  \frac{4}{3} x 3.142 x r^{3} = 3031.76

4.19r^{3}  = 3031.76

r^{3} = 3031.76/4.19  

radius r of the balloon on liftoff = \sqrt[3]{723.57} = <em>8.98 m</em>

4 0
3 years ago
A heat engine has a maximum possible efficiency of 0.780. If it operates between a deep lake with a constant temperature of-24.8
Volgvan

Answer : The temperature of the hot reservoir (in Kelvins) is 1128.18 K

Explanation :

Efficiency of carnot heat engine : It is the ratio of work done by the system to the system to the amount of heat transferred to the system at the higher temperature.

Formula used for efficiency of the heat engine.

\eta =1-\frac{T_c}{T_h}

where,

\eta = efficiency = 0.780

T_h = Temperature of hot reservoir = ?

T_c = Temperature of cold reservoir = -24.8^oC=273+(-24.8)=248.2K

Now put all the given values in the above expression, we get:

\eta =1-\frac{T_c}{T_h}

0.780=1-\frac{248.2K}{T_h}

T_h=1128.18K

Therefore, the temperature of the hot reservoir (in Kelvins) is 1128.18 K

8 0
3 years ago
What are the standard units of displacement?
Grace [21]
The answer is meters....I think??
7 0
3 years ago
a negative charge is moving across the room from south to north. a magnetic field runs from east to west. in what direction is t
Bezzdna [24]

The correct answer is:

c. toward the floor


In fact, we can find the direction of the magnetic force that acts on a positive moving charge by using the right-hand rule:

- index finger: direction of the charge

- middle finger: direction of magnetic field

- thumb: direction of the force

We also have to keep in mind that for a negative charge, we should reverse the direction of the thumb in order to find the correct direction of the force.


In this case:

- index finger: south to north

- middle finger: east to west

- thumb: toward the ceiling

and since the charge is negative, we have to reverse the sign of the thumb, so the magnetic force points toward the floor.

7 0
3 years ago
Read 2 more answers
The moons of Mars, Phobos (Fear) and Deimos (Terror), are very close to the planet compared to
katrin2010 [14]

Answer:D- 0.2528

Explanation:

T=(Rp/Rd)^3/2

T=(9378/23459)^3/2

T=0.2528

The answer is D

3 0
4 years ago
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