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4 years ago

How is mercury obtained and separated from other nearby substances?

1 answer:

8 0

Mercury forms in an ore called cinnabar, it is also frequently found in small amounts in other ores.

A method for separating mercury from cinnabar is to crush the ore and then heat it in a furnace in order to vaporize the mercury.

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As you climb a mountain, you can expect the air temperature to decrease by 6.5 degrees C for every 1000 meters you ascend. This

Reptile [31]

Answer:

the answer will be C. 4 degrees C

Explanation:

you subtract base meters from peak meters to get 4 meters; then Multiply 6.5 by 4.

Then subtract that total from 30 degrees C

***as altitude increases, temperature decreases***

6 0

3 years ago

Write a scientific question that is specific and testable. Jack and Jill when up a hill to fetch a pail of water. Once they got

Naya [18.7K]

The scientific method consists of making an observation, ask a question, formulate hypothesis, predict, test, iterate

The scientific question that can be asked is; What is the depth of the well

The reason why the above question is appropriate is as follows:

The items Jack and Jill found at the well

No pail

A stopwatch

Nine equal sized rocks

The information they can get using what they found are;

The time it takes the rock to reach the water surface in the well

The depth of the well

The well's depth, h, is given using the equation of free fall, as follows;

$h = \dfrac{1}{2} \cdot g \cdot t^2$

Where;

g ≈ Acceleration due to gravity ≈ 9.81 m/s²

By recording the time each rock takes to reach the water surface in the well, the average depth of the well, $h_{ave}$ , can be found by finding the average of the 9 calculated values for h using the 9 stones

Therefore;

The scientific question that is specific and testable is how deep is the well, or what is the well's depth

Learn more about scientific method here:

brainly.com/question/13096299

3 0

3 years ago

HELP I DON'T PAY ATTENTION ENOUGH

Setler [38]

Answer:

I think 1 is d and 2 is A

Explanation:

but I may be wrong and I am so sorry if I am

8 0

3 years ago

Read 2 more answers

A 4.0×1010kg asteroid is heading directly toward the center of the earth at a steady 16 km/s. To save the planet, astronauts str

blondinia [14]

Answer:

a. t = 69.4 hr = 2.89 days

b. theta = 91.67*10^-3 degrees

c. deflection_angle = 0.134 degrees

Explanation:

a).

The asteroid impacts the earth in t

t = x/v = (4.0*10^6 km)/(16 km/sec)

t = 2.5 * 10^5 sec

t = 69.4 hr = 2.89 days

b).

tan(theta) = 6400 km/(4.0*10^6 km)

tan(theta) = 1.6*10^-3

theta = arctan(1.6*10^-3)

theta = 1.6*10^-3 radians (for small angles, tan(theta) ~= theta)

theta = 91.67*10^-3 degrees

c).

v_minimum = 6400 km/(2.5 * 10^5 sec)

v_minimum = 25.6 m/s

Using F = m*a, we can calculate the acceleration of the asteroid due to the rocket's thrust:

5.0*10^9 N = 4.0*10^10 kg * a

a = (5.0*10^9 N)/(4.0*10^10 kg)

a = 0.125 m/s^2

The transverse velocity after 300 seconds of this acceleration is:

v_transverse = a*t = 0.125 m/s^2 * 300 s

v_transverse = 37.5 m/s = 37.5*10^-3 km/s

tan(deflection_angle) = v_transverse/(20 km/s)

tan(deflection_angle) = (37.5*10^-3 km/s)/(16 km/s) = 2.34^-3

deflection_angle = arctan(2.34*10^-3)

deflection_angle = 2.34*10^-3 radians = 0.134 degrees

v_transverse/(16 km/s) > (6400km)/(5.0*10^6 km)

(note that the right hand side if this inequality is tan(theta) calculated above)

v_transverse > 23.704 m/

8 0

3 years ago

Walking dancing and even some household chores are?

kramer

Answer:

Actions

Explanation:

if u mean what are these called then it's actions

3 0

3 years ago

Read 2 more answers