_______________ involves removing the top layer of earth, mining the coal, and then replacing the earth back on the surface

Answers

Answer 1

Answer: Surface mining is the method of removing the overburden parts of the earth which are the earth and rocks. It also involves removal and loading out of the coal, and then placing back the collected earth back into a surface once again. It's also a method that uses equipment or explosives.

Related Questions

An arrow is fired horizontally at a target that is 40 m away (horizontal d). The arrow drops 0.5 m before striking the target. With what velocity is the arrow fired (what is the horizontal vi)?
In science, theories tend to be ______________________ than hypotheses. Answers: A) more speculative B) more empirical C) less scientific D) more experimental E) broader in scope
1 C is the total charge associated with 6.242 x 10¹⁸ electrons. How many electrons will pass through the cross section of a conductor if 50 μA of current flows for 5 s?
which one would have more gravitational mass? one kilogram of iron dropped from 200 meters height or one kilogram of paper on the ground?
To find the number of neutrons in an atom, you would subtractA.) mass number from atomic number B.) atomic number from mass number C.) atomic number from electron number D.) isotope number from atomic number

two small balls are suspended on parallel threads of the same length so that they touch each other in the vertical position. the mass of the first ball is 0.4kg and the mass of the second ball is 200g. the first ball is deflected so that its centre of mass rises to a height of 6cm and it is then released. to what maximal height will the 200g ball rise if the collision is elastic?

Answers

Answer: 12cm

Explanation:

Since first ball is raised to a height h1= 6cm, it gains a potential energy(PE1). On release, this PE1 is converted to kinetic Energy (KE1). This KE1 impact it energy on ball 2 ans it rise also. Since collision is elastic.

KE1 = KE2 ....> PE1 = PE2

m1 ×g × h1 = m2 × g× h2

h2 = m1×h1/m2

h2 = 0.4 × 0.06/0.2

h2 = 0.12m = 12cm

Who first introduced the idea that the Sun is the center of the universe?A. Albert Einstein
B. Edwin Hubble
C. Johannes Kepler
D. Nicolaus Copernicus

Answers

I'm not sure that Copernicus was the 'first', but he was
certainly before any of the other names on that list.

Also, to be technical about it, none of those other choices
would agree that the sun is the center of the "universe" ...
only the center of the solar system.

Your answer would be D. Nicolaus Copernicus, he introduced this idea in a pamphlet that he published in 1514.

A lamp is plugged into a standard 120-volt outlet. If the lamp draws a current of 0.5-amps, how much energy is consumed in 1 minute?

Answers

One handy formula for electrical power ... the one that's
most helpful here ... is:

Power = (voltage) x (current).

so Power = (120 volts) x (0.5 ampere) = 60 watts.

Now 60 watts means 60 joules of energy per second.
In one minute, the lamp dissipates

(60 joules/second) x (60 seconds/minute) = 3600 joules/minute.

A solid magnesium flare has a mass of 1300 g and a volume of 743 cm3 what is the density of the magnesium

Answers

Answer:

$density = 1.75 g/cm^3$

Explanation:

As we know that the mass of the magnesium is given as

mass = 1300 g

volume of the magnesium is

volume = 743 cubic cm

so we will have

$density = (mass)/(volume)$

so we will have

$density = (1300)/(743)$

$density = 1.75 g/cm^3$

If two runners take the same amount of time to run a mile, they have the same __________.A.
acceleration
B.
force
C.
mass
D.
velocity

Answers

They have the same average speed over a mile.

If both of their miles are in straight lines, and in the same directions, and they
both take the same time, then their average velocities are also the same.

its d. velocity i just took the test on edge

What causes a magnetic field to form around certain metals, such as iron?a. The majority of the domains are aligned.
b. The majority of the protons are aligned.
c. The majority of non-metal atoms are aligned.
d. The majority of the atoms have been acted upon by gravity.

Answers

The correct answer is a

Other Questions

For a winter fair, some students decide to build 30.0 kg wooden pull carts on sled skids. If two 90.0 kg passengers get in, how much force will the puller have to exert to move a pull cart? The coefficient of maximum static friction between the sled skids and the road is 0.15

Physics - Wave Diagrams AssignmentWaveWaveBCAN SOMEONE HELP ME LOL

In the modern quantum-based atomic theory, what is the name given to a particular space around the nucleus in which an electron moves?

A 139 kg physics professor has fallen into the Grand Canyon. Luckily, he managed to grab a branch and is now hanging 89 m below the rim. A student (majoring in linguistics and physics) decides to perform a rescue/experiment using a nearby horse. After lowering a rope to her fallen hero and attaching the other end to the horse, the student measures how long it takes for the horse to pull the fallen physicist to the rim of the Grand Canyon. The acceleration of gravity is 9.8 m/s 2 . If the horse’s output power is truly 1 horsepower (746 W), and no energy is lost to friction, how long should the process take? Answer in units of s.