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
Dimas [21]
3 years ago
15

Why are plate tectonics a theory?

Physics
1 answer:
liubo4ka [24]3 years ago
8 0
Plate tectonicss a property of the behavior of systems, plates, that are far from fundamental, like particles. So any statement about them is a theory.
You might be interested in
A wire is stretched right to its breaking point by a 5000 N force. A longer wire made of the same material has the same diameter
leva [86]

Answer:

Equal to 5000N

Explanation:

The stress on the material is defined by force per unit of cross-sectional area. So it depends on the force and the diameter of the wire, which is the same for both wires. The material that defines the breaking point, is also the same. Therefore, both wires have their breaking point the same at 5000N. The wire length plays no role in here.

4 0
3 years ago
If a quasar is moving away from us at v/c = 0.8, what is the measured redshift?
Delicious77 [7]

Answer:

The measured redshift is z =2

Explanation:

Since the object is traveling near light speed, since v/c = 0.8, then we have to use a redshift formula for relativistic speeds.

z= \sqrt{\cfrac{c+v}{c-v}}-1

Finding the redshift.

We can prepare the formula by dividing by lightspeed inside the square root to both numerator and denominator to get

z= \sqrt{\cfrac{1+\cfrac vc}{1-\cfrac vc}}-1

Replacing the given information

z= \sqrt{\cfrac{1+0.8}{1-0.8}}-1

z= \sqrt{\cfrac{1.8}{0.2}}-1\\z= \sqrt{9}}-1\\z=3-1\\z=2

Thus the measured redshift is z = 2.

4 0
3 years ago
PHYSICS<br> I need help with number two!!!!
EleoNora [17]

Answer:

mgh₁ + ½mv₁² = mgh₂ + ½mv₂²

Explanation:

Initial total energy = final total energy

PE₁ + KE₁ = PE₂ + KE₂

mgh₁ + ½mv₁² = mgh₂ + ½mv₂²

7 0
3 years ago
Which best describes how geothermal energy is used to make electricity?. . A.. Rocks are split to release energy that drives a s
In-s [12.5K]
Answer is b that is  Heat energy from below the ground converts water to steam to drive a steam turbine attached to an electrical generator.. . 
6 0
3 years ago
What is the relationship between the applied force of a hanging mass on a spring and the spring force of the spring?
zaharov [31]

Answer:

elastic force and weight are related to the acceleration of the System.

Explanation:

The relationship between these two forces can be found with Newton's second law.

        F_{e} - W = m a

        K x - m g = m a

We see that elastic force and weight are related to the acceleration of the System.

If a harmonic movement is desired, an extra force that increases the elastic force is applied, but to begin the movement this force is eliminated, in general , if the relationship between this external and elastic force is desired, the only requirement is that it be small for harmonic movement to occur

7 0
3 years ago
Other questions:
  • A student uses an electronic force sensor to study how much force the student’s finger can apply to a specific location. The stu
    12·2 answers
  • Cathode ray tubes in old television sets worked by accelerating electrons and then deflecting them with magnetic fields onto a p
    8·1 answer
  • How long is a year on Earth and what journey does the Earth make in this space of time?
    8·2 answers
  • The ultimate source of energy for almost all living organisms is A. animals. B. bacteria. C. plants. D. the Sun.
    10·2 answers
  • Before 1960, people believed that the maximum attainable coefficient of static friction for an automobile tire on a roadway was
    13·1 answer
  • The Bohr radius a0 is the most probable distance between the proton and the electron in the Hydrogen atom, when the Hydrogen ato
    9·1 answer
  • A completely inelastic collision occurs between two balls of wet putty that move directly toward each other along a vertical axi
    9·1 answer
  • Determine the acceleration that results when a 12 N net force is applied to a 3 kg object
    9·1 answer
  • Remaining Time: 1 hour, 49 minutes, 34 seconds.
    11·1 answer
  • How high does Pete lift his sledge hammer if he used a force of 25N to lift the hammer while doing 50J of work?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!