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
Shalnov [3]
3 years ago
10

What is the shortest time that a jet pilot starting from rest can take to reach Mach-3.60 (3.60 times the speed of sound) withou

t graying out? (Use 331 m/s for the speed of sound in cold air.)
Physics
1 answer:
zaharov [31]3 years ago
7 0

Answer:

30.4 s

Explanation:

A pilot , with plane accelerated at 4 g starts greying out . In the problem , the acceleration of jet is 4 g

a = 4 x 9.8 = 39.2 m /s²

initial velocity u = 0

Final velocity = 3.60 times speed of sound

= 3.6 x 331 = 1191.6 m /s

v = u + at

Putting the values

1191.6 = 0 + 39.2 t

t = 30.4 s .

You might be interested in
what is the relationship between high frequency and short wavelength? Low frequency and long wavelength?​
larisa [96]

Answer:

The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength.

5 0
3 years ago
Why must the operating temperature of a heat engine be higher than that of the cold sink?
Anna35 [415]

Answer:

It is important to note, that the 2nd Law of thermodynamics plays no fundamental role in answering this question; we need a heat sink because the entropy is a state function, and at the end of the reversible process (which is visualized through the Carnot cycle diagram relevant for this problem), the entropy value of the system must return to the value it had originally.

6 0
4 years ago
When an electric soldering iron is used in a 110 V circuit, the current flowing through the iron is 2 A. What is the resistance
Romashka-Z-Leto [24]

Now we know by Ohm's law that

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Introducing the constant of proportionality, the resistance,the Ohm's law can be mathematically represented as

V=I x R

Where V is the voltage measured in volts

I is the current measured in amperes

R is the resistance measured in ohms


Given:

I = 2 A

V= 110 V

Applying Ohm's law and substituting the given values in the above formula we get

V=I x R

110 = 2 X R

R = 55 ohms

4 0
3 years ago
A horizontal force of magnitude 356 N is employed to push a 78.0-kg block a distance of 18.6 m on a rough horizontal surface. If
icang [17]

Answer:

6621.6 Joule

0.46525

Explanation:

F = Force = 356 N

s = Displacement = 18.6 m

m = Mass of block = 78 kg

Work done

W=F\times s\\\Rightarrow W=356\times 18.6\\\Rightarrow W=6621.6\ J

The work done by the horizontal force is 6621.6 Joule

F=\mu mg\\\Rightarrow \mu=\frac{F}{mg}\\\Rightarrow \mu=\frac{356}{78\times 9.81}\\\Rightarrow \mu=0.46525

The coefficient of friction between the block and the rough surface is 0.46525

5 0
3 years ago
Define in importance of building stores​
Jobisdone [24]
The building sector plays a large role in the energy consumption which includes space heating or cooling, domestic hot water and electricity. Buildings with their long lifespan and huge amount of already existing buildings, makes revision in energy characteristics of a building constrained.
4 0
3 years ago
Other questions:
  • How many years would take to terraform for Mars
    14·1 answer
  • Signs that say "do not use near an open flame" refer to a(n) A) energy property. B) chemical property. C) physical property. D)
    10·1 answer
  • What happens when light rays pass through a concave lens?
    9·2 answers
  • An Alaskan rescue plane traveling 41 m/s
    9·1 answer
  • What happens when you touch a metal doorknob after rubbing your shoes on the carpet
    13·1 answer
  • "Two electrons in an atom are separated by 1.4 × 10−10 m, the typical size of an atom. What is the force between them? The Coulo
    10·1 answer
  • Which object has the greatest inertia? *
    12·2 answers
  • An important safety consideration with an electromagnet is to disconnect the wires when not in use because they can get ________
    15·1 answer
  • A cup of mass 0.4 kg with its base radius of 4 cm is kept on a table. Calculate the pressure exerted by the cup on the table.​
    10·1 answer
  • What is the momentum of a vehicle that has a mass of 800 kg and is moving at a velocity of 5 m/s
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!