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
kirza4 [7]
3 years ago
5

Scientists believe Earth is about how many billion years old

Physics
2 answers:
ehidna [41]3 years ago
7 0
The earth is 4.54 billion years old.
ivolga24 [154]3 years ago
5 0
Scientists believe the earth is about 4 billion years old. But it's not true. It is really only 6,000 years old.
You might be interested in
An object with a mass of 6.0 kg accelerates 8.0 m/s^2 when an unknown force is applied to it. What is the amount of the force? R
iren [92.7K]

Answer:

48N

Explanation:

use F=ma, or force is equal to mass multiplied by acceleration.

8 0
3 years ago
Which formula is used to calculate the mass of an object if the force and acceleration are known? m = Fa m = m = m = F – a
SOVA2 [1]
I'm pretty sure it is m = Fa
7 0
3 years ago
Read 2 more answers
The Doppler shift can be observed when ____________. Check all that apply. Group of answer choices the source of sound moves tow
castortr0y [4]

Answer:

the source of sound moves towards an observe

Explanation:

The Doppler effect is related to waves such as sound or light. the effect causes an increase or decrease in the frequency of sound light or other waves when the souces either move towards or away from the observer. For example the siren of the train to a person on the platform, the redshift seen by astronomers.

Therefore, The Doppler shift can be observed when the source of sound moves towards an observer From a place closer to the observer than the last wave's crest, each consecutive wave crest is sent. Each wave therefore, takes a little less time than the preceding wave to reach the observer.

6 0
2 years ago
Plz help it really easy
Mrac [35]

The answer is high to low.

3 0
3 years ago
Read 2 more answers
In an experiment, a rectangular block with height h is allowed to float in two separate liquids. In the first liquid, which is w
Amiraneli [1.4K]

Answer:

The relative density of the second liquid is 7.

Explanation:

From archimede's principle we know that the force that a liquid exerts on a object equals to the weight of the liquid that the object displaces.

Let us assume that the volume of the object is 'V'

Thus for the liquid in which the block is completely submerged

The buoyant force should be equal to weight of liquid

Mathematically

F_{buoyant}=Weight\\\\\rho _{1}\times V\times g=m\times g\\\\\therefore \rho _{1}=\frac{m}{V}...............(i)

Thus for the liquid in which the block is 1/7 submerged

The buoyant force should be equal to weight of liquid

Mathematically

F'_{buoyant}=Weight\\\\\rho _{2}\times \frac{V}{7}\times g=m\times g\\\\\therefore \rho _{2}=\frac{7m}{V}.................(ii)

Comparing equation 'i' and 'ii' we see that

\rho_{2}=7\times \rho _{1}

Since the first liquid is water thus \rho _{1}=1gm/cm^3

Thus the relative density of the second liquid is 7.

6 0
3 years ago
Read 2 more answers
Other questions:
  • 150c passes through cell in 30 seconds. cell has a potential difference of 12v. what is current in the circuit
    5·1 answer
  • Which model is used to describe the interaction of external forces that affect an organization's strategy and ability to compete
    13·1 answer
  • From the lab iodine clock reaction: explain the reason this result by comparing what is involved in changing Fe2+ into Fe 3+ to
    10·1 answer
  • A 9.38 microFarad capacitor is measured to have a reactance of 260.0 Ohm. At what frequency (in Hz) is it being driven?
    14·1 answer
  • An airplane is flying through the air at a speed of 150 mph at a heading of 60 degrees. if the wind is blowing at 20 mph from th
    7·1 answer
  • How quickly a leaf grows is proportional how big [ie the surface area] the leaf is. If the area of the leaf grows from 2cm2 to 3
    13·1 answer
  • Do you think most people follow the recommended guidelines for an adequate exercise routine?
    9·1 answer
  • Explain two ways you could reduce the friction between two surfaces
    13·1 answer
  • Which of the following is a common downside of net pens, one of the most common forms of aquaculture?
    15·2 answers
  • Can a physical guantity have unit but is dimensionless ?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!