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
evablogger [386]
3 years ago
6

A hot air balloon is ascending at a rate of 7.5m/s when a passenger drops a camera. If the camera is 25m above the ground when i

t is dropped, how much time does it take for the camera to reach the ground, and what is the velocity just before it lands?
Physics
1 answer:
Gemiola [76]3 years ago
5 0
The time it takes for an object to reach a certain level given the distance and the initial velocity can be calculated through the equation,

    d = V₀t + 0.5gt²

Where d is the distance, V₀ is the initial velocity, g is the acceleration due to gravity and t is time. Substituting the known values from the given above,

   25 = (-7.5)(t) + 0.5(9.8 m/s²)(t²)

The value of t from the equation 3.15s. Hence, it will take the object 3.15 seconds to reach the ground. 
You might be interested in
At a fixed depth within a fluid at rest, the pressure pushing upward is
earnstyle [38]

Answer: E) A) salt water.

Explanation:

E) In equilibrium, pressure exerts equally in all directions, so for a given depth, the pressure is the same for all points located at the same depth, and it can be written as follows:

p = p₀ + ρ.g.h, where p₀ = atmospheric pressure, ρ=fluid density, h=depth from the surface.

A) The buoyant force, as discovered by Archimedes, is an upward force, that opposes to the weight of an object (as it is always downward), and is equal to the weight of the volume of the liquid that the object removes, which means that is proportional to the density of the liquid.

As salt water is denser than fresh water, the buoyant force exerted by the salt water is always greater than the one produced by the fresh water, so objects will float more easily in salt water than in fresh water.

In the limit, it is possible that one object float in salt water and sink in fresh water.

3 0
3 years ago
The batteries in the figure above are connected in​
Elena-2011 [213]
The answer is a, series circuit.
5 0
3 years ago
Read 2 more answers
What is the importance of measurement? <br>​
Kruka [31]

Answer:

To know the time ,length area

8 0
3 years ago
Gases are more prone to expansion and contraction than liquid . The biggest change in the volume in your thermometer was probabl
KiRa [710]

Answer:

In the air

Explanation:

There are three states of matter:

- Solids: in solids, the particles are tightly bond together by strong intermolecular forces, so they cannot move freely - they can only vibrate around their fixed position

- Liquids: in liquids, particles are more free to move, however there are still some intermolecular forces keeping them close to each other

- Gases: in gases, particles are completely free to move, as the intermolecular forces between them are negligible

For this reason, it is generally easier to compress/expand the volume of a gas with respect to the volume of a liquid.

In this problem, we are comparing water (which is a liquid) with air (which is a gas). From what we said above, this means that the change in volume is larger in the air rather than in the water.

8 0
3 years ago
I need help i don’t want to go to summer school
Sonbull [250]

Answer:

makes you hungry is not a science based benefit of meditation

7 0
3 years ago
Other questions:
  • PLEASE ANSWER ALL! CORRECT ANSWERS ONLY!!!!
    11·1 answer
  • Which of the following does NOT describe the conversion of potential to kinetic energy? Question 12 options:
    13·1 answer
  • What term is used to describe the hot ash, gases, and materials being erupted at speeds of up to 400 mph?
    11·1 answer
  • Difference between acceleration and decceleration short notes​
    12·2 answers
  • The speed of a bullet of mass 20 g is 216 kilometre-per-hour what is kinetic energy in joules​
    13·1 answer
  • Which two concepts are Newton´s laws based on?
    6·2 answers
  • A car is traveling to the right with a speed of 29\,\dfrac{\text m}{\text s}29
    7·1 answer
  • How much resistance allows 6V battery to produce a current of 0.006 amps?
    14·1 answer
  • A 20 ohm resistor has 210 volts measured<br> across it. What is the current?
    6·1 answer
  • A 1200 kg car is moving at 8 m/s when is strikes a barrier with an equivalent spring constant of 18,000 N/m. How far is the barr
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!