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
julia-pushkina [17]
3 years ago
11

What causes a submarine to rise and descend?

Physics
1 answer:
photoshop1234 [79]3 years ago
6 0

Answer:

When the ballast tanks are filled with air, the submarine rises to the surface because it has positive buoyancy. With water inside the tanks, the sub has negative buoyancy so it sinks deeper into the ocean.  The ballast tanks can also be used to help a submarine surface very quickly in an emergency

Explanation:

You might be interested in
A 1.2-kg ball drops vertically onto the floor, hitting with a speed of 25 m/s. Consider the impulse during this collision. Would
Ksju [112]

Answer:

3kg

Explanation:

impulse = MV

then

m1v1=m2v2

when the values are subtitude

then

m2=1.2*25/10

m2=<em>3</em><em>0</em><em>k</em><em>g</em><em>/</em><em>/</em>

7 0
3 years ago
1. During the Middle Ages, armies often attacked castles using large siege engines such as the counterweight trebuchet at left.
fredd [130]

Answer: Some challenges that I could see would be the walls, possibly a moat, tar, and the towers.

Explanation: The wall is obliviously a main problem, trying to get over it or through it is a difficult challenge. The moat (if it has one) means that there is more than likely only one way to get in or out.  If it does have tar it means that the attackers are going to be put in a "sticky situation" And finally the towers, they have people at the top shooting arrows down at you, or throwing things at you.

8 0
3 years ago
How to find instantaneous velocity physics?
evablogger [386]
You should have the velocity as a function of time either given explicitly or implicitly (a graph)

v = ds/dt  (differentiating the position vector)

integrating the acceleration.

you can use impulse or work and energy principle and also newton law of motion to find acceleration then velocity


NOT SURE IF THAT WHAT YOU WANT.
 
8 0
3 years ago
Which of the following statements about floating objects is always true? a. The object’s density is greater than the density of
Yuki888 [10]
It should be C. If the object is denser than the fluid, it will sink. If it isn't, it will float
6 0
3 years ago
Read 2 more answers
Does a stone lying on the ground have stored energy
Vesnalui [34]
Yes, It has a stored energy in that stone.
7 0
3 years ago
Other questions:
  • For a machine to be a heat engine, what kind of conversion must it perform?
    10·2 answers
  • The Kelvin scale begins at zero and goes up, 0 Kelvin is also known as _________.
    9·1 answer
  • If you add air to a flat tire through a single small entry hole, why does the air spread out to fill the tire
    14·2 answers
  • Write an equation that expresses the following relationship. u varies jointly with p and d and inversely with w In your equation
    5·1 answer
  • The first international standard of length was a metal bar kept at the International Bureau of Weights and Measures. One meter o
    10·1 answer
  • Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an el
    6·2 answers
  • Ilya and Anya each can run at a speed of 7.50 mph and walk at a speed of 4.00 mph. They set off together on a route of length 5.
    14·1 answer
  • Which of these statements explains why we have day and night? [1] The Earth orbits the Sun once a day The Sun orbits the Earth o
    5·1 answer
  • Giving 25 points need help ASAP!
    8·1 answer
  • A scientist adds different amounts of salt to 5 bottles of water. She then measures how long it takes for the water to boil. Wha
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!