1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yaroslaw [1]
3 years ago
15

Before heating a hot air balloon, the air temperature is 20C, and the density of air is 1 kg/m3. To launch the balloon, the burn

er is lit, and the air temperature inside the balloon is raised to 30C. What is the air density in the balloon now?
Physics
2 answers:
yuradex [85]3 years ago
7 0

Answer:

p_2 = 0.967 kg/m^3

Explanation:

Given:

- Initial Temperature T_1 = 20 C

- Final Temperature T_2 = 30 C

- Initial Density of air p_1 = 1 kg/m^3

Find:

The Density of air after heating.

Solution:

- The air can be idealized and expressed using Ideal Gas Law as follows:

                                         P = p*R*T

Where,

P = Absolute pressure

R = Gas constant for air

T = Absolute Temperature

- We know that the pressure P of the air remains constant at 1 atm.

                                        P_1 / R = P_2/R

                                     p_1*T_1 = p_2*T_2

                                     p_2 = p_1 * (T_1 / T_2)

Plug in the values:

                                     p_2 = 1 * (20+273 / 30+273)

                                     p_2 = 0.967 kg/m^3

Mrrafil [7]3 years ago
4 0

Answer:

Explanation:

  • density and temperature have an inverse relationship between them.
  • initial density = 1 kg/m3
  • initial temperature = 20C = 293k
  • final temperature = 30C = 303k
  • final density = ?

ρT = K

ρ1T1 = ρ2T2

ρ2 = ρ1T1/T2

= 1 X 293 /303

= air density in the balloon now = 0.967kg/m3

You might be interested in
Convert 90 oF to Celcius, (write your answer up to 1st decimal point)
Mice21 [21]

Answer:

The answer is 32.2

Explanation:

Hope this helps

5 0
3 years ago
Read 2 more answers
A busy chipmunk runs back and forth along a straight line of acorns that has been set out between his burrow and a nearby tree.
saveliy_v [14]

Answer: a = 1.32m/s2

Therefore, the average acceleration is 1.32m/s2

Explanation:

Acceleration is the rate of change in the velocity per time

a = change in velocity/time

a = ∆v/t

average acceleration a = (v2 -v1)/t. ....1

Given;

Final velocity v2 = 1.63m/s

Initial velocity v1 = -1.15ms

time taken t = 2.11s

Substituting into eqn 1

a = [1.63 - (-1.15)]/2.11

a = (1.63+1.15)/2.11

a = 2.78/2.11

a = 1.32m/s2

Therefore, the average acceleration is 1.32m/s2

6 0
4 years ago
In the diagnostic radiology energy range (which includes mammography) from 23 to 150 kVp, which of the following tissues possess
Semmy [17]

Answer:

Bone

Explanation:

Diagnostic radiology include the use of non-invasive imaging scans to diagnose a patient.

The voltages used in diagnostic tubes range from roughly 20 kV to 150 kV and thus the highest energies of the X-ray photons range from roughly 20 keV to 150 keV.

The tests and equipment used sometimes involves low doses of radiation to create highly detailed images of an area.

4 0
3 years ago
Gravitational force depends on the mass of an object.
vampirchik [111]

Answer:

sun, earth, capitol building, human, atom

Explanation:

Gravity is directly proportional to the size of an object. Therefore, the object with the most mass will have the greatest force of gravity. We know this from the equation. F = G\frac{m_1m_2}{r^2}

4 0
3 years ago
Why might a balloon, that is inflated almost to its capacity, pop or explode on an extremely warm day?
REY [17]
On an extremely warm day, the balloon might pop because gases expand the hotter they get, and due to its temperature it is likely to pop if it is, indeed, nearly, if not completely, filled to its capacity.  I hope this helps, have a nice day!
7 0
3 years ago
Read 2 more answers
Other questions:
  • If the frequency of a wave is tripled, what happens to the period of the wave?
    9·1 answer
  • Mike's car, which weighs 1,000 kg, is out of gas. Mike is trying to push the car to a gas station, and he makes the car go 0.05
    12·1 answer
  • What do significant figures in a measurement include___________________________________.
    7·1 answer
  • You are loading a toy dart gun, which has two settings, the more powerful with the spring compressed twice as far as the lower s
    7·1 answer
  • Which statement is FALSE?
    14·1 answer
  • Matter behaving like a wave rather than like a particle is best illustrated by which phenomenon?
    7·1 answer
  • L. What does it mean to "convert" from one unit to another? Give an example.
    6·2 answers
  • The hardest known natural material is _____. <br> jade<br> quartz<br> diamond<br> talc
    13·2 answers
  • You're driving down the highway late one night at 20 m/s when a deer steps onto the road 39 m in front of you. Your reaction tim
    5·1 answer
  • 1 point
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!