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
olya-2409 [2.1K]
3 years ago
14

A silver bar 0.125 meter long is subjected to a temperature change from 200 C to 100 C . What will be the length of the bar afte

r the temperature change?
A) 0.00023635 meter
B) 0.124764 meter
C) 0.00002363 meter
D) 0.0000189 meter
Physics
2 answers:
dimulka [17.4K]3 years ago
8 0
\Delta L= \alpha L_0 (T_f-T_i)

= (18 x 10^-6 /°C)(0.125 m)(100° C - 200 °C)

= -0.00225 m

New length = L + ΔL
= 1.25 m + (-0.00225 m)
= 1.248
So your answer is B.
maksim [4K]3 years ago
7 0

iiiiiii agree lol EVERYONE HAVE A GREAT DAY

You might be interested in
A bat hits a ball; which has the greater acceleration, the bat or the ball?
MaRussiya [10]
The ball because the Kinetic Energy transfers from the bat to the ball, increasing the movement and acceleration of the ball because of the Kinetic Energy transferred from the origin force (The bat)
7 0
3 years ago
Read 2 more answers
The standard measure used to compare sound intensities is the ______ .
uranmaximum [27]
The answer is Decibels. <span />
4 0
2 years ago
Read 2 more answers
A
Natasha_Volkova [10]

Answer:

i think it might be D or C

4 0
3 years ago
Coherent light with wavelength 540 nm passes through narrow slits with a separation of 0.370 mm .Part AAt a distance from the sl
77julia77 [94]

Answer:

The phase difference between waves 31.7 rad

Explanation:

Given :

Wavelength \lambda = 540 \times 10^{-9} m

Separation between two slit d = 0.370 \times 10^{-3} m

Angle \theta = 25°

From the formula of phase difference,

  \delta = \frac{2\pi d }{\lambda}  \sin \theta

Where \delta = phase difference

\delta = \frac{2 \times \pi \times 0.370 \times 10^{-3} }{540 \times 10^{-9} } \sin 25

\delta = 31.7 rad

Therefore, the phase difference between waves 31.7 rad

5 0
2 years ago
A physics professor demonstrates the Doppler effect by tying a 600 Hz sound generator to a 1.0-m-long rope and whirling it aroun
VARVARA [1.3K]

Answer:

(a) f= 622.79 Hz

(b) f= 578.82 Hz

Explanation:

Given Data

Frequency= 600 Hz

Distance=1.0 m

n=120 rpm

Temperature =20 degree

Before solve this problem we need to find The sound generator moves on a circular with tangential velocity

So

Speed of sound is given by

c = √(γ·R·T/M) ............in an ideal gas

where γ heat capacity ratio

R universal gas constant

T absolute temperature

M molar mass

The speed of sound at 20°C is

c = √(1.40 ×8.314472J/molK ×293.15K  / 0.0289645kg/mol)

c= 343.24m/s

The sound moves on a circular with tangential velocity

vt = ω·r.................where   ω=2·π·n

vt= 2·π·n·r

vt= 2·π · 120min⁻¹ · 1m

vt= 753.6 m/min  

convert m/min to m/sec

vt= 12.56 m/s

Part A

For maximum frequency is observed  

v = vt

f = f₀/(1 - vt/c )

f= 600Hz / (1 - (12.56m/s / 343.24m/s) )  

f= 622.789 Hz

Part B

For minimum frequency is observed

v = -vt

f = f₀/(1 + vt/c )

f= 600Hz / (1 + (12.56m/s / 343.24m/s) )

f= 578.82 Hz

3 0
2 years ago
Other questions:
  • Megan rode the bus to school, which is located 8 kilometers from her home. If Megan's frame of reference is her house, and it to
    7·1 answer
  • n general, which trophic level has the LEAST energy available to it? A) producer B) primary consumer C) secondary consumer D) te
    9·1 answer
  • Which of the following is the most likely end for a star that is small to average in size?
    10·1 answer
  • What type of circuit is this?
    5·2 answers
  • after the Collision the two cars stick together find the initial velocity of the car on the right hand side​
    9·1 answer
  • A tennis ball is dropped from 1.62 m above the
    15·1 answer
  • A car’s momentum is p when it is traveling with a velocity of v. If the velocity of that car doubles, what is the new momentum o
    8·2 answers
  • I need help with this please thank you!
    12·1 answer
  • What are the four most important characteristics of an electric circuit?
    10·2 answers
  • What is difference between heat engine and carnot engine
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!