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
katovenus [111]
3 years ago
5

One man wanted to weigh the air. He blew a balloon and weighed it. Then he blew air out of the balloon and weighed again. The we

ight in both cases was the same. From this the man concluded that the air weighs nothing. Why is it wrong? Hint: What type of container should be Better used to measure the weight of air.
Physics
1 answer:
raketka [301]3 years ago
6 0

Answer:

Because there's buoyancy force

Explanation:

What is wrong here is that he assumes that gravity is the only force affecting the weight of the balloon on the scale here. In reality there's also buoyancy force which lifts the full blown balloon upwards.

A better type of container would be an air tank where its volume does not change when it's empty and when it's full of air.

You might be interested in
The force applied when using a simple machine
jenyasd209 [6]

Answer:

effort

Explanation:

effort is the answer

7 0
3 years ago
Read 2 more answers
What type of fault creates huge mountains
vladimir1956 [14]

Together, normal and reverse faults are called dip-slip faults, because the movement on them occurs along the dip direction -- either down or up, respectively. Reverse faults create some of the world's highest mountain chains, including the Himalaya Mountains and the Rocky Mountains .

7 0
3 years ago
What is the kinetic energy of a 1.40 kg discus with a speed of 22.5 m/s?
Oksana_A [137]
Kinetic energy = (1/2) (mass) (speed)²

                         = (1/2) (1.4 kg) (22.5 m/s)²

                         =    (0.7 kg)  (506.25 m²/s² )

                         =          354.375  kg-m²/s²  =  354.375 joules .

This is just the kinetic energy associated with a 1.4-kg glob of
mass sailing through space at 22.5 m/s.  In the case of a frisbee,
it's also spinning, and there's some additional kinetic energy stored
in the spin. 
8 0
3 years ago
Show the weight of the ladder and draw the missing Frictional force.
madreJ [45]
Since there is no friction between the ladder and the wall, there can be no vertical force component. That's the tricky part ;)

So to find the weight, divide the 100N <em>normal</em> force by earths gravitational acceleration, 9.8m/s^2

W =  \frac{N}{g}  =  \frac{100N}{9.8m/s^{2}} =  \frac{100}{9.8} = 10.2kg


Then;
Draw an arrow at the base of the ladder pointing towards the wall with a value of 30N, to show the frictional force.
5 0
3 years ago
When a boat moves through the water, the waves in front of the boat bunch up, while the waves behind the boat spread out. this i
liberstina [14]

Answer: Doppler Effect

Doppler Effect can be described as the change in wavelength of a wave like upward shift in frequency for an object whom is approaching and an apparent downward shift in frequency for observers from whom the source is receding. This effect can be observed when a boat moves through the water then the waves in front bunch up while the waves behind the boat spread out.

8 0
3 years ago
Other questions:
  • If the amount of gas in a sealed container increases, what happens to the pressure in the container
    10·2 answers
  • Which theory suggests that the moon and the earth formed at the same time from dust and the solar nebula that formed the sun?
    7·1 answer
  • How many layers of data can a DVD store?<br> 3<br> 2<br> 4<br> 1<br> 1
    9·1 answer
  • A gas in a piston-cylinder assembly undergoes a compression process for which the relation between pressure and volume is given
    8·1 answer
  • To lift an objet weighing 21,000N, how much force is needed on a piston with an area of 0.060 meters squared if the platform bei
    8·1 answer
  • What is net force explain with an example
    6·1 answer
  • Consider the two level (AND-OR) function f1(A, B, C, D) = AC0D + AB0D0 and two level (OR-AND) function f2(A, B, C, D) = (A+B +D0
    7·1 answer
  • A bullet 2cm log is fired at 420m/s and passes straight a 10cm thick board exiting at 280m/s
    8·2 answers
  • The average velocity of a tennis ball is measured during serving and found to be 216 km/hr.
    9·1 answer
  • A basketball is tossed upwards with a speed of 5.0 m/s. We can ignore air resistance. What is the maximum height reached by the
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!