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
astra-53 [7]
3 years ago
11

The density of pine is generally about 0.5g/cm3. What is the mass of an 800cm3 piece of pine?

Physics
1 answer:
Lapatulllka [165]3 years ago
6 0
M=400g hope it helps

You might be interested in
What is the density of an object with mass of 60 g and a volume of 2cm3
Artemon [7]

Answer:

D=mass /volume

=60/0.002

=30000

4 0
2 years ago
A 40-cmcm-long tube has a 40-cmcm-long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube. A
Licemer1 [7]

Answer:

1070 Hz

Explanation:

First, I should point out there might be a typo in the question or the question has inconsistent values. If the tube is 40 cm long, standing waves cannot be produced at 42.5 cm and 58.5 cm lengths. I assume the length is more than the value in the question then. Under this assumption, we proceed as below:

The insert in the tube creates a closed pipe with one end open and the other closed. For a closed pipe, the difference between successive resonances is a half wavelength \frac{\lambda}{2}.

Hence, we have

\dfrac{\lambda}{2}=58.5-42.5=16 \text{ cm}

\lambda=32\text{ cm}=0.32 \text{ m}.

The speed of a wave is the product of its wavelength and its frequency.

v=f\lambda

f=\dfrac{v}{\lambda}

f=\dfrac{343}{0.32}=1070 \text{ Hz}

7 0
3 years ago
A solar cooker, really a concave mirror pointed at the Sun, focuses the Sun's rays 13.8 cm in front of the mirror. Part A What i
shepuryov [24]

From the concept of optics on a curvature of a spherical mirror, the proportion for which the focal length is equivalent to half the radius of curvature is fulfilled. Mathematically this is

f = \frac{R}{2}

Here,

f = Focal Length

R = Radius

Rearranging to find the radius we have,

R = 2f

Replacing with our values,

R = 2(13.8cm)

R = 27.6cm

Therefore the radius of the spherical surface from which the mirror was made is 27.6cm

6 0
2 years ago
Only negative charges move<br><br> True<br><br> False
Flura [38]
The answer is False, pls. mark me the brainliest if I’m right. THX
7 0
2 years ago
Read 2 more answers
Can someone please help, ty!!<br> Will mark brainliest.
Vinil7 [7]

Answer:

#1 ( Balanced ) ( Rest)

#2 ( Unbalanced)  ( Accelerating)

Explanation:

3 0
2 years ago
Other questions:
  • What is the frequency of a microwave with a wavelength of 3.52 mm?
    11·2 answers
  • How long would it take for Sofia to walk 300 meters if she is walking at a velocity of 2.5 m/s?
    11·2 answers
  • Several forces act on a ball. Which of the following statements must be true? The velocity and acceleration could be in any dire
    13·1 answer
  • Technician A says that other temperature sensors that operate like the ECT include transmission fluid temperature (TFT), and eng
    9·1 answer
  • The tortoise and the hare are having a race over a course of length 0.52 km. The tortoise crawls along at a constant 0.075 m/s w
    12·1 answer
  • A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle
    5·1 answer
  • Directions: WRITE a summary of the Newton’s Laws of Motion reading.
    9·1 answer
  • Match the following items.
    6·1 answer
  • A tugboat is pulling a barge into a harbor. The barge is exerting a force of 3000 N against the tugboat.
    6·2 answers
  • Why are latitude and longitude included on maps
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!