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
prohojiy [21]
3 years ago
8

A(n)... is a material that takes in a wave when the wave hits it

Physics
1 answer:
pentagon [3]3 years ago
5 0
Absorber, it absorbs the light, like a black shirt is an absorber.. 
You might be interested in
vague terms are often used in advertising because they can have more than one meaning true or false??
Elan Coil [88]
True ! Examples: brighter, refreshing, easy, fine, firm, satisfying.
6 0
3 years ago
A horizontal vinyl record of mass 0.10 kg and radius 0.10 m rotates freely about a vertical axis through its center with an angu
Tresset [83]

Answer:

The angular speed of the record is 3.36 rad/s.

Explanation:

Given that,

Mass of record= 0.10 kg

Radius = 0.10 m

Angular speed = 4.7 rad/s

Moment of inertia I=5.0\times10^{-4}\ kgm^2

Mass of putty = 0.020 kg

We need to calculate the angular speed

Using law of conservation of momentum

L_{i}=L_{f}

I\omega_{i}=(I+mr^2)\omega_{f}

\omega_{f}=\dfrac{I\omega_{i}}{(I+mr^2)}

Put the value into the formula

\omega_{f}=\dfrac{5.0\times10^{-4}\times4.7}{5.0\times10^{-4}+0.020\times(0.10)^2}

\omega_{f}=3.36\ rad/s

Hence, The angular speed of the record is 3.36 rad/s.

3 0
4 years ago
which best describes the big bang theory ? A. matter was compressed into a single point and then exploded outward to form the un
Furkat [3]

Answer:

A. matter was compressed into a single point and then exploded outward to form the universe

Explanation:

The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now (and it could still be stretching).

6 0
4 years ago
Question 1
Agata [3.3K]

Answer:

Hypothesis:

The amount of limestone that dissolves in the acid is directly proportional to the concentration of acid used.

Explanation:

Acids dissolve limestone according to the following general equation;

2HX(aq) + CaCO3(s) -------> CaX2(aq) + H2O (l) + CO2(g). Where HX represents any acid at all.

This dissolution process is a chemical reaction. It was experimentally observed that the amount of limestone that dissolved in acid depends on the concentration of acid. Various concentrations of acid were then prepared and a particular mass of limestone was dissolved in each concentration of acid. The amount of limestone dissolved in each case was carefully noted.

It was observed that as the concentration of acid increased, the amount of limestone dissolved increased also and vice versa, hence the hypothesis proposed above.

3 0
4 years ago
The elastic energy stored in your tendons can contribute up to 35%% of your energy needs when running. Sports scientists find th
zzz [600]

Answer:

11.16 J

Explanation:

Elastic energy (E) stored in the tendon is given by 1/2ke^2

SPRINTERS

k = 31N/mm = 31N/mm × 1000mm/1m = 31,000N/m

e = 41mm = 41mm × 1m/1000mm = 0.041m

E = 1/2 × 31,000 × 0.041^2 = 26.06J

NON-ATHLETES

k = 31,000N/m

e = 31mm = 31mm × 1m/1000 = 0.031m

E = 1/2 × 31,000 × 0.031^2 = 14.90 J

Difference = 26.06 J - 14.90 J = 11.16 J

4 0
3 years ago
Other questions:
  • Social science is a branch of science that deals with the nature of
    12·1 answer
  • (this is somehow part of my science unit, dont ask why)
    15·1 answer
  • Why don’t metals break when hit with hammer
    9·1 answer
  • An immense body of air characterized by similar properties at any given altitude is known as _____.
    6·2 answers
  • Which system of measurement does the u.s. use? the metric system the si system the english system us customary system
    9·2 answers
  • A spring is compressed between two cars on a frictionless airtrack. Car A has four times the mass of car B, MA = 4 MB, while the
    8·1 answer
  • What is the formula for wheel and axel
    14·1 answer
  • What must you do if you plan to exercise everyday
    7·2 answers
  • Any four difference between speed and acceleration ​
    5·1 answer
  • 12. Which of the following statements is accurate?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!