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
PtichkaEL [24]
3 years ago
15

A bimetallic strip consists of two metals: A on top and B at bottom. At temperature 00C this bimetallic strip was rigidly attach

ed to the vertical wall with one end, so strip is horizontal. We know that coefficient of thermal expansion of metal A is less than coefficient of thermal expansion of metal B. Temperature starts to raise. What happens to the bimetallic strip?
a. nothing happens
b. it contracts in horizontal direction
c. it bends down
d. it bends up
e. it expands in horizontal direction
Physics
1 answer:
joja [24]3 years ago
7 0

Answer:

e. it expands in horizontal direction

Explanation:

By the law of thermal expansion of metals we know that when a metal is heated it expands due to the thermal properties of its molecules.

<u>Mathematically this expansion in its length is given by:</u>

\Delta l=l.\alpha.\Delta T

where:

l= original length of the metallic piece

\alpha= coefficient of linear expansion

\Delta T= rise in temperature

  • Here, in the given question we have a bimetallic strip with one end attached to the wall rigidly so that it is in horizontal orientation.
  • Upon heating the strip gains the temperature and expands horizontally along the length because it is <em>fixed to the wall only from one end.</em>
You might be interested in
The behavior of which objects are better explained by Einstein’s general theory of relativity than Newton’s universal law of gra
liq [111]
If I had to go with any of those answers, It would be A maybe D, But im not too sure on how to decide between them. Because Einstein mentioned the sun in his theory which has a very large mass <span> 1.989 x 10 with a exponent of 30 to be exact. Hope this helped though.</span>
7 0
3 years ago
Read 2 more answers
ASAP do all will give 25 per person pls will mark brainiest
neonofarm [45]

Answer:

1) true

2) false

3) false

4) true

5) true

6) true

7) true

8) false

9) true

10) false

i think these are correct if im wrong on a few im sorry. Hope this helps at least a bit. And if i do get some wrong you know just to pick the opposite answer.

4 0
3 years ago
What is meant by free fall
Firlakuza [10]
Downward movement under the force of gravity only.
5 0
3 years ago
Read 2 more answers
A helium nucleus (charge = 2e, mass = 6.63 10-27 kg) traveling at 6.20 105 m/s enters an electric field, traveling from point ci
MA_775_DIABLO [31]

Answer:

v_B=3.78\times 10^5\ m/s

Explanation:

It is given that,

Charge on helium nucleus is 2e and its mass is 6.63\times 10^{-27}\ kg

Speed of nucleus at A is v_A=6.2\times 10^5\ m/s

Potential at point A, V_A=1.5\times 10^3\ V

Potential at point B, V_B=4\times 10^3\ V

We need to find the speed at point B on the circle. It is based on the concept of conservation of energy such that :

increase in kinetic energy = increase in potential×charge

\dfrac{1}{2}m(v_A^2-v_B^2)=(V_B-V_A)q\\\\\dfrac{1}{2}m(v_A^2-v_B^2)={(4\times 10^3-1.5\times 10^3)}\times 2\times 1.6\times 10^{-19}=8\times 10^{-16}\\\\v_A^2-v_B^2=\dfrac{2\times 8\times 10^{-16}}{6.63\times 10^{-27}}\\\\v_A^2-v_B^2=2.41\times 10^{11}\\\\v_B^2=(6.2\times 10^5)^2-2.41\times 10^{11}\\\\v_B=3.78\times 10^5\ m/s

So, the speed at point B is 3.78\times 10^5\ m/s.

7 0
3 years ago
You adjust the temperature so that a sound wave travels more quickly through the air. You increase the temperature from 30 degre
katen-ka-za [31]
To calculate the velocity of the sound wave, we use this formula:
V = 331 + [0.6*T], 
Where V is the velocity and T represents temperature.
When the temperature is 36 degree Celsius, we have 
V = 331 + [0.6 * 36]
V = 331 + 21.6 = 352.6 
Therefore, V = 352.6 m/s.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Water, in a 100-mm-diameter jet with speed of 30 m/s to the right, is deflected by a cone that moves to the left at 14 m/s. Dete
    8·1 answer
  • An electron is acted on by two electric forces, one of 2.7×10-14 N acting upward and a second of 5.8×10-14 N acting to the right
    7·1 answer
  • A force is applied to an object at rest with a mass of 100kg. A force twice as large is applied to another object at rest with a
    15·1 answer
  • A(n) ______ is a gap in the geologic record where some rock layers have been lot because of erosion
    15·1 answer
  • Un objeto de 1 kg se mueve con una velocidad cambia 10m/s¿se ha realizado trabajo sobre el objeto?​
    8·1 answer
  • A diesel engine a. uses only air during the intake stroke. b. is an external-combustion engine. c. uses a spark plug to ignite f
    5·2 answers
  • Think about a situation at school where you or someone you know
    10·1 answer
  • An asteroid is discovered in a nearly circular orbit around the Sun, with an orbital radius that is 3.570 times Earth's. What is
    8·1 answer
  • A chemical reaction is the only way to separate a(n)
    6·1 answer
  • A geologist finds that a Moon rock whose mass is 8.94 kg has an apparent mass of 6.18 kg when submerged in water. What is the de
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!