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
pochemuha
3 years ago
11

A basketball goal has a metal pole that is 3.50 m high at 21°C. On a cool day, at -11.5°C, it contracts by 0.00174 m.?

Physics
2 answers:
ch4aika [34]3 years ago
4 0

Answer:

<u>1.53</u>×10^-5 ( ⁰C)^-1

Nastasia [14]3 years ago
3 0

Answer:

1.53

Explanation:

α=Δl/(l Δt) here α is coefficient of linear expansion Δl is change in length l is original length andΔt is change in temperature

Δl=0.00174m , l=3.50m ,Δt=21-(-11-5)= 21+11.5 =32.5 ⁰C

α = 0.00174 / (3.50×32.5)

   = 1.53×10^-5 ( ⁰C)^-1

You might be interested in
Is there a frame of reference one can go into that seems to eliminate gravity as Newton described it?
andriy [413]

Answer:

Yes such a frame exists: a free-fall (free-float frame) frame. This frame of reference is subject only to gravity and no forces such as electromagnetic forces or nuclear forces.

3 0
3 years ago
A wheel starts from rest and rotates with constant angular acceleration to reach an angular speed of 11.1 rad/s in 2.99 s.(a) fi
elena55 [62]
The angular acceleration of a rotating object is given by
\alpha =  \frac{\omega_f - \omega_i}{\Delta t}
where
\omega_f is the final angular speed of the object
\omega_i is its initial angular speed
\Delta t is the time taken to accelerate

For the wheel in our problem, \omega_f=11.1 rad/s, \omega_i = 0 and \Delta t=2.99 s, so its angular acceleration is
\alpha= \frac{11.1 rad/s-0}{2.99 s}=3.71 rad/s^2
8 0
3 years ago
A student wants to demonstrate entropy using the songs on her portable music player. What should she do to demonstrate the lowes
antoniya [11.8K]

Answer:  A. play a single song by a single artist

Explanation: Entropy is the measure of randomness or disorder of a system.

A system that has more random distribution is considered to have more entropy and a system with ordered arrangement is considered to have less entropy.

Playing a single song by a single artist has least randomness , and lowest disorder and thus has lowest entropy.

4 0
3 years ago
Two technicians are discussing U-joints. Technician A says that a defective U-joint could cause a loud clunk when the transmissi
Nookie1986 [14]

Answer:

Technician A and Technician B are correct.

Explanation:

6 0
3 years ago
The relationship between m2,cm2,mm2 and km2​
Tema [17]

Answer:

m2

Explanation:

I just knowyyysydyyyyyyyýdydysyydysysydydhdhhdhdhdhxhchxhhxhc

4 0
3 years ago
Read 2 more answers
Other questions:
  • Noble gases, such as argon and neon, are known for being extremely non-reactive. Neon and argon are non-reactive because they A.
    14·2 answers
  • Emily holds a banana of mass m over the edge of a bridge of height h. She drops the banana and it falls to the river below. What
    9·1 answer
  • You're driving down the highway late one night at 20 m/s when a deer steps onto the road 38 m in front of you.Your reaction time
    6·1 answer
  • Calculate the change in time for each quarter of the track. Record the change in time in Table E of your Student Guide. The chan
    12·1 answer
  • What are some non examples of proton
    13·1 answer
  • Which event may occur when ocean salinity increases?
    8·2 answers
  • If the speed of an object is increasing, then the forces acting on that object must be ________.
    14·1 answer
  • When a substance easily dissolves in a liquid, it has high solubility in that liquid. When a substance does not easily dissolve
    7·1 answer
  • an airplane flying due north at 90. km/h is being blown due west at 50. km/h. what is the resultant velocity of the plane?
    12·1 answer
  • An olympic high diver has gravitational potential energy because of her height. as she dives, what becomes of her energy just be
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!