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
Trava [24]
3 years ago
6

A submarine completed a 450 km training with an average speed of 50 km/h. For the first 180 km, it travelled at an average speed

of 60 km/h. What was the average speed for the remaining distance? Km/h
Physics
1 answer:
Kryger [21]3 years ago
4 0

Answer:

45km/hr

Explanation:

Total distance=450km

Total speed=50km/hr

Total time= distance/speed

=450/50

=9hrs

distance a=180km

speed a=60km/hr

Time a=180/60

=3hrs

Distance b=450-180=270km

Speed b=?

Time b=270/speed b

Total time=time a + time b

9=3+(270/speed b)

270/speed b =9-3

270/speed b =6

6*speed b =270

Speed b=270/6

Speed b=45km/hr

You might be interested in
Which statement about energy transformations is not true?
frutty [35]

Answer:

C

Explanation:

Let's consider the conservation of energy

Energy can not be destroyed or created energy can be transferred one form energy to a another form of energy.

(A) Then all form of energy can be transfer into any form of energy . There for all forms of energy can be transformed to thermal energy

(B) This is the law of conservation of energy

(C)Potential chemical energy can be transferred into any form of energy. It's not only to kinetic energy

(D) Some amount of thermal energy always released when it's transferred energy due to reaction forces or frictional forces.

3 0
3 years ago
Can a molecule have bond dipoles but not have a molecular dipole?
MissTica

Answer: Yes

Explanation: A molecule has a bond dipole but not have a molecular dipole.

Dipole moment:  dipole moment is the product of the distribution of the charge of the molecules and the distance between of the molecules.  

Example:  

lets take an example of  CO_{2} molecule in which two electro negative oxygen atoms are attached with Carbon atom. Oxygen being electro negative will attract the shared pair electrons towards itself and  partial negative charge will create on oxygen atom and partial positive charge on carbon atom C.

due to formation of partial positive and partial negative charges dipole moment is created between oxygen and Carbon bond on both the sides in opposite direction.

Since, the dipole moment acting in opposite direction the net dipole moment in the molecule is zero.

Hence, Yes, a molecule has bond dipoles but not have a molecular dipole.

8 0
4 years ago
Which TWO correctly relate the attraction between the particles of a liquid and the temperature at which the liquid changes stat
Naddika [18.5K]
A and C because stronger attractions means it needs more energy to break them so a higher temperature is needed
7 0
3 years ago
Read 2 more answers
GIVING EASY BRAINLIEST PLEASE HELP!!
AlekseyPX

Answer: I think the answer is heat flows from the lemonade to the ice

Explanation: the heat transports to the lemonade which makes the lemonade hot and the ice will melt if the drink is hot

7 0
3 years ago
A laboratory experiment produces a double-slit interference pattern on a screen. The point on the screen marked with a white dot
Alenkasestr [34]

Explanation:

Diffraction is a characteristic phenomenon for waves, and is based on their variance to find an obstacle or a crack. The diffraction and interference are inseparable phenomena, which are so harder to identify. Since diffraction is a specific type of interference.

if the point are in the order 2, and

the equation is d×senx=mL y at m=2

3 0
3 years ago
Other questions:
  • In a tight circular turn, a falcon can attain a centripetal acceleration 1.5 times free-fall acceleration. What is the radius of
    5·1 answer
  • After landing on a distant exoplanet as a member of the Space Force Spec Ops Team one of your first tasks is to measure the grav
    13·1 answer
  • Choose all the answers that apply.
    14·2 answers
  • Electromagnetic Induction states that moving a magnet through a loop of wire creates which of the following?
    5·1 answer
  • Water is boiled. The resulting stream is blown against huge turbine blades. The turbine blades spin in a magnetic field, produci
    6·2 answers
  • Massive stars terminate in a brilliant explosion called a
    6·1 answer
  • what is similar about elements in the same group on the periodic table? A) atomic masses B) atomic numbers C) chemical propertie
    12·1 answer
  • What is the common name for tropospheric ozone
    8·1 answer
  • Please help me with this speed thigh <br> Help help
    6·2 answers
  • John rode 3,150 m at an average speed of 350 m/min. If he
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!