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
ankoles [38]
3 years ago
5

Which of the following is a way in which earth material is returned to the surface?

Physics
2 answers:
kvv77 [185]3 years ago
4 0

Answer:

Explanation:

soil

LuckyWell [14K]3 years ago
4 0

Answer:volcanic eruption

Explanation:i took the test and got it right

You might be interested in
A green plant has_____energy
adelina 88 [10]
A green plant has Chemical energy.

This chemical energy is stored as Chlorophyll which in turn reacts with sunlight and water, to form sugar through the process of Photosynthesis.
4 0
3 years ago
What are two reasons why density is a useful physical property for identifying substances?
padilas [110]
Some substances look alike and the density can help you determine which is which. It also helps to tell which is heavier than the other.
4 0
3 years ago
Consider the model above. It represents the electrical force. As r increases, the attractive force decreases. How would this mod
aivan3 [116]

Answer:

As we keep on increasing the radius the value of the gravitation force of attraction decreases and as we decrease the radius the gravitation force increases.

Explanation:

Like the coulombs law of electrostatics, the law of gravitation also depends inversely on the square of the value of r. Therefore, as we keep on increasing the value of r the value of the gravitation force decreases and as we decrease the value of the r the value of gravitation force increases.

Gravitation Force=\frac{Gm_{1}m_{2} }{r^{2}}

Coulombs's Law= \frac{Kq_{1}q_{2} }{r^{2}}

6 0
3 years ago
Read 2 more answers
Carbon is allowed to diffuse through a steel plate 9.7-mm thick. The concentrations of carbon at the two faces are 0.664 and 0.3
cupoosta [38]

Answer:

844°C

Explanation:

The problem can be easily solve by using Fick's law and the Diffusivity or diffusion coefficient.

We know that Fick's law is given by,

J = - D \frac{\Delta c}{\Delta x}

Where \frac{\Delta c}{\Delta x} is the concentration of gradient

D is the diffusivity coefficient

and J is the flux of atoms.

In the other hand we have, that

D= D_0 e^{\frac{E_d}{RT}}

Where D_0 is the proportionality constant,

R is the gas constant, T the temperature and E_d is the activation energy.

Replacing the value of diffusivity coefficient in Fick's law we have,

J = -D_0 ^{\frac{E_d}{RT}}\frac{\Delta c}{\Delta x}

Rearrange the equation to get the value of temperature,

T=\frac{Ed}{Rln(\frac{J\Delta x}{D_0 \Delta c})}

We have all the values in our equation.

\Delta c = 0.664-0.339 = 0.325 C. cm^{-1}

\Delta x = 9.7*10^{-3}m

E_d = 82000J

D_0 = 6.5*10^{-7}m^2/s

J = 3.2*10^{-9}m^2/s

R= 8.31Jmol^{-1}K

Substituting,

T=\frac{Ed}{Rln(\frac{J\Delta x}{D_0 \Delta c})}

T=-\frac{-82000}{(8.31)ln(\frac{3.2*10^{-9}(9.7*10^{-3})}{6.5*10^{-7} (0.325)})}

T=1118.07K=844\°C

4 0
3 years ago
A chair of weight 90.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F =
Lelu [443]
I post an image instead

3 0
3 years ago
Other questions:
  • BIO EST The archerfish (genus Toxotes) preys on land-based insects inhabiting tree limbs above the water. It has the ability to
    10·1 answer
  • If the rocket burns its fuel in a time of 50.0 s and the relative speed of the exhaust gas is vex = 2100 m/s, what must the mass
    10·1 answer
  • Two identical soccer balls are rolled towards each other. What will be true after they collide head-on
    12·2 answers
  • Should young children be treated as “little adults”? Based on what you have learned about development, do you think that is reas
    12·2 answers
  • Suppose a ball with mass M hangs vertically from a spring with stiffness k and relaxed length L0. At what length Leq will the ba
    12·1 answer
  • What is the equivalent resistance in this circuit?<br>What is the current in this circuit?
    10·2 answers
  • If the mass of each object is the same, 18 g, which object will have the largest density? *
    11·1 answer
  • Two students go to play basketball. They notice the ball is flat (it won't bounce). They decide to pump it up with air. After it
    9·1 answer
  • उत्तोलक हुन् ?
    11·1 answer
  • Which way will the object accelerate if the forces given are the following
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!