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
Natali [406]
3 years ago
7

A sound wave has a frequency of 247 Hz and a wavelength of 1.4 m. What is the speed of the sound wave in air?

Physics
1 answer:
zavuch27 [327]3 years ago
5 0
The speed of sound through air at room temperature is almost always 343 m/s. However, since it doesn't tell you that, use the equation wavelength=velocity/frequency. Plug in the numbers: 1.4=v/247, and v=345.8 m/s. 
You might be interested in
7. Thermal energy depends upon the______ and _____ of an object?
d1i1m1o1n [39]

:

Please give me brainly,

The thermal energy of an object depends on three things: 4 the number of molecules in the object 4 the temperature of the object (average molecular motion) 4 the arrangement of the object's molecules (states of matter). The more molecules an object has at a given temperature, the more thermal energy it has.

3 0
3 years ago
Read 2 more answers
An athlete stretches a spring an extra 40.0 cm beyond its initial length. how much energy has he transferred to the spring, if t
marissa [1.9K]
The energy transferred to the spring is given by:
U= \frac{1}{2}kx^2
where 
k is the spring constant
x is the elongation of the spring with respect its initial length

Let's convert the data into the SI units:
k=52.9 N/cm = 5290 N/m
x=40.0 cm=0.4 m

so now we can use these data inside the equation ,to find the energy transferred to the spring:
U= \frac{1}{2}kx^2= \frac{1}{2}(5290 N/m)(0.4m)^2=423.2 J
4 0
3 years ago
What makes the element named iron (Fe) different from the element named nickel (Ni)? A. Iron is a solid but nickel is a gas. B.
Mazyrski [523]

Answer:C, Atoms of iron are different from atoms of nickel.

Explanation:All the atoms that make up each type of element are alike, and they are different from the atoms that make up every other type of element. So the element iron is different from the element nickel because the atoms that make up the iron are different from the atoms that make up the nickel.

6 0
3 years ago
A bicycle is traveling north at 5.0 m/s. The mass of the wheel, 2.0 kg, is uniformly distributed along the rim, which has a radi
andreev551 [17]

Answer:2

Explanation:

Given

Velocity of bicycle is 5 m/s towards north

radius of rim r=20 cm

mass of rim m=2 kg

Angular momentum \vec{L}=I\cdot \vec{\omega }

I=mr^2=2\times 0.2^2=0.08 kg-m^2

\omega =\frac{v}{r}=\frac{5}{0.2}=25 rad/s

L=0.08\times 25=2kg-m^2/s  

direction of Angular momentum will be towards west

7 0
3 years ago
Which kind of information is known about a person if that person’s DNA is in a database? A. how old the person is
shepuryov [24]
<span>the kind of information that we could know about a person if that person's DNA is in a database is : C. sme diseases the person might have Some diseases are proven to because by the passed DNA during reproduction process without any external factors. Example of these diseases are : sicle cell anemia and colorblindess</span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • An electron that has a velocity with x component 2.6 × 106 m/s and y component 3.2 × 106 m/s moves through a uniform magnetic fi
    14·1 answer
  • In still​ water, a boat averages 18 18 miles per hour. it takes the same amount of time to travel 16 miles 16 miles ​downstream,
    14·1 answer
  • The strong crystal structure of an ionic compound is one of the main reasons why ionic compounds have a __________ melting point
    12·1 answer
  • (TIMED) Anyone know the answer to this question?
    7·2 answers
  • A 1.00-kg mass is attatched to a string 1.0m long and completes a horizontal circle in 0.25s. What is the centripetal accelerati
    9·1 answer
  • A rock falls from a cliff. What is its velocity after 4 seconds, in m/s?
    13·1 answer
  • Gases tend to deviate from the ideal gas law at
    10·1 answer
  • A(n) 1946 kg car travels at a speed of 10 m/s . What is its kinetic energy ? Answer in units of J.
    14·1 answer
  • Explanation: One can pick up a nail using the curved part of the horseshoe magnet farthest from the poles. A horse shoe magnet h
    13·1 answer
  • What two things must exist for an electric current to be produced?A pair of highly conductive materials and a conducting path be
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!