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
barxatty [35]
3 years ago
14

) A hot air balloon along with its cargo has a mass of 4.0 x 105 kg, and it holds 7.0 x 10 5 m3 of hot air. It is floating at a

constant height in air with a density of 1.29 kg/m3. What is the density of the hot air in the balloon
Physics
1 answer:
vitfil [10]3 years ago
8 0

Answer:

0.72 kg/m^3

Explanation:FIRST FIND UPTHRUST WHICH SHOULD BE EQUAL TO WEIGHT OF HOT BALLOON. SUBTRACT WEIGHT OF PERSONS TO GET WEIGHT WEIGHT OF HOT AIR . DIVIDE WEIGHT BY 9.8 TO GET MASS OF HOT AIR . SINCE VOLUME IS GIVEN FIND DENSITY . SEE ATTACHMENT

Download pdf
You might be interested in
The voltage V in a simple electrical circuit is slowly decreasing as the battery wears out. The resistance R is slowly increasin
Ganezh [65]

Answer:

The current in the circuit decrease slowly .

Explanation:

Given as :

For the electrical circuit

The voltage V in the circuit is slowly decreasing

The resistance R of the resistor slowly increasing after heating

Now, From Ohm's Law

Voltage is directly proportional to the flow of current through circuit

I.e V ∝ I

Or. V = R × I

where R is the proportionate constant and this is the resistance of the resistor

whose property is to opposes the flow of current in the circuit

So, If R value more then current I reduces in the circuit

∵ Here in the circuit ,  The resistance is slowly increasing, so, current I is slowly decreasing .

Hence The current in the circuit decrease slowly . answer

3 0
3 years ago
HURRY! PLEASE HELP!!!!<br><br><br> 3. What methods are you using to test this (or each) hypothesis?
Pie

Answer:

How to Test Hypotheses

State the hypotheses. Every hypothesis test requires the analyst to state a null hypothesis and an alternative hypothesis. ...

Formulate an analysis plan. The analysis plan describes how to use sample data to accept or reject the null hypothesis. ...

Analyze sample data. ...

Interpret the results.

4 0
3 years ago
A boat takes off from a dock at 2.5 m/s and speeds up at 4.2 m/s squared for six seconds how far has the most traveled
GaryK [48]

The boat's position x relative to its starting point x_0=0 is determined by

x=x_0+v_0t+\dfrac12at^2

where v_0 is its initial velocity, a is its acceleration, and t is time. After t=6\,\mathrm s, the boat has traveled

x=\left(2.5\,\dfrac{\mathrm m}{\mathrm s}\right)(6\,\mathrm s)+\dfrac12\left(4.2\,\dfrac{\mathrm m}{\mathrm s^2}\right)(6\,\mathrm s)^2

\implies x=91\,\mathrm m

3 0
3 years ago
D the element in blue square has a full outer shell, due to it’s location on the periodic table, so it will not react with other
Juliette [100K]
The correct response that will be used to describe this particular element would be the third option, since all of the other options are incorrect and apply to different elements in their groups. The element is a metal and will react with a non metal.






5 0
3 years ago
Wave crests in a pond are separated by 0.2m . The period of these waves is 0.2 s . What is the speed at which these waves travel
Ne4ueva [31]

1m per minute

or .5 m per 30 seconds

5 0
3 years ago
Other questions:
  • How does kinetic energy affect the stopping distance of a small vehicle compared to a large vehicle?
    13·1 answer
  • A resistor and a capacitor are connected in series across an ideal battery having a constant voltage across its terminals. Long
    11·1 answer
  • Which subatomic particle has a neutral charge
    11·2 answers
  • Which free body diagram is in equilibrium? Question 5 options:
    12·1 answer
  • How are magnetic field lines and electric field lines alike
    5·1 answer
  • A 5.3 kg block initially at rest is pulled to the right along a frictionless, horizontal surface by a constant horizontal force
    7·2 answers
  • How many types of ion are formed when water splits during
    5·1 answer
  • A printer has a power of 100 W. It takes 30 seconds to print out a document. How much energy will it
    11·2 answers
  • If a cheetah goes from 10 m/s to 30 m/s in 5 seconds, what was her acceleration?
    15·2 answers
  • When light of wavelength 160 nm falls on a gold surface, electrons having a maximum kinetic energy of 2. 66 ev are emitted. Find
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!