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
e-lub [12.9K]
2 years ago
8

Which of the following is a good thermal insulator?* Iron Styrofoam Silver Graphite

Physics
2 answers:
Goryan [66]2 years ago
7 0

Answer: graphite

Explanation:

igor_vitrenko [27]2 years ago
6 0
A good thermal insulator is iron
You might be interested in
We intend to observe two distant equal brightness stars whose angular separation is 50.0 × 10-7 rad. Assuming a mean wavelength
san4es73 [151]

Answer:

13.4cm

Explanation:

According to Rayleigh’s criterion the angular resolution to distinguish two objects is given by:

\theta=1.22\frac{\lambda}{b}

θ = 50.0*10^-7 rad

λ: wavelength of the light = 550nm

b = diameter of the objective

By doing b the subject of the formula and replacing the values of the angle and wavelength you obtain:

b=1.22\frac{\lambda}{\theta}=1.22\frac{550*10^{-9}m}{50.0*10^{-7}rad}=0.134m=13.4cm

hence, the smallest diameter objective lens is 13.4cm

8 0
2 years ago
Read 2 more answers
Two blocks, of mass m and 2m, are initially at rest on a horizontal frictionless surface. A force F is exerted individually on e
Anon25 [30]

The block has the greatest average power provided is bock m.

<h3>What is instantaneous power?</h3>
  • This is the product of force and velocity exerted on an object.

Mathematically instantaneous power is calculated as;

P = Fv

where;

  • F is the applied force
  • v is the velocity

Both blocks (m and 2m) will experience the same force but different velocity.

The smaller block (m) will experience greater velocity.

Thus, the block has the greatest average power provided is bock m.

Learn more about instantaneous power here: brainly.com/question/8893970

7 0
2 years ago
Kyra and Pari are timing how long it takes for 1 g of sugar to dissolve in hot water. Kyra records a time of 24.3 seconds. Pari
Hoochie [10]
<h3>Answer:</h3><h3>we can say that:-</h3>
  1. A reading with more no of significant figures is considered to be more precise.
  2. Kyra recorded a reading of 24.3 sec. Since all non 0 digits are considered to be significant this reading has 3 significant figures.
  3. Pari recorded a reading of 24 sec. Since all non 0 digits are considered to be significant this reading has 3 significant figures.
<h3>hence we can say that kyra's reading has more significant figures nd so it is more precise.</h3>

7 0
2 years ago
What condition is necessary for an object to make a good reference point?
777dan777 [17]
The object is fixed relative to the motion you are trying to describe.
8 0
3 years ago
Calculate the elastic potential energy stored in a spring if it has a force constant of 150 N/m. the spring is extended to a len
Alenkinab [10]

Answer:

6.75J

Explanation:

U=1/2KΔx²

U=0.5* 150*0.30^2

4 0
2 years ago
Other questions:
  • Which of the following best illustrates chemical potential energy a dog Plane, gasoline gasoline, water moving down hill, a skyd
    8·1 answer
  • What are the agonist and antagonist muscle of a wrist joint???
    10·2 answers
  • Luis wanted to know which of his 4 toy cars is the fastest. He conducted an experime and recorded his results in the table shown
    14·1 answer
  • a student raises a 4kg ball to an unknown height on a building. It is calculated that the ball has a speed of 30m/s when it hits
    11·1 answer
  • A battery consists of five dry cells connected in series. If the voltage developed by each cell is 1.5 V, the total voltage deve
    5·2 answers
  • Work and power!!
    15·1 answer
  • Water does not run out of dropper unless the rubber-bulb is pressed. Why?
    7·1 answer
  • What is a scientific model?Question 2 options:A group of objects that interact with each other.A complex system made of many sma
    11·1 answer
  • 1 If electromagnetic radiation acted like particles in the double-slit experiment, what would be observed?
    13·1 answer
  • Write a rule for the sequence. 3, -3, -9, -15. A. Start with 3 and add -6 repeatedly B. Start with -6 and add 3 repeatedly C. St
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!