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2 years ago

What are common uses of the mineral quartz? (1 point)

Physics

1 answer:

nata0808 [166]2 years ago

8 0

Answer:

science

Are rocks considered valuable natural resources?(1 point)

No, rocks are not valuable because they contain a lot of waste.

No, rocks are not valuable because they are nonliving solids.

Yes, rocks are valuable because they are useful to people.

Yes, rocks are valuable because they are part of Earth’s crust.

Aluminum is produced from bauxite ore and can be used for many things. Which option describes a common production use of aluminum?(1 point)

steel objects

electrical wiring and pipes

fuel for nuclear power plants

lightweight containers and drugs

What are common uses of the mineral quartz?(1 point)

building and paving materials

glass manufacturing and paints

automobile manufacturing and packaging

iron and steel production

Bornite is which type of ore?(1 point)

copper ore

iron ore

bauxite ore

uraninite ore

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A 25-ohm resistor at steady state draws a current of 10.8 amperes. its temperature is 310 k; the temperature of the surroundings

MA_775_DIABLO [31]

The total rate of entropy generation is 0.268 J/K.

Entropy, the degree of a gadget's thermal electricity consistent with unit temperature that is unavailable for doing useful paintings. due to the fact work is acquired from ordered molecular motion, the quantity of entropy is likewise a measure of the molecular sickness, or randomness, of a machine.

Resistance of resistor R = 25 ohm

the total rate of entropy generation ?

Current flowing through resistor I = 10 A

Heat generation due to resistance , Q = I2R = 100*25 = 2500 J

Resistor temperature T = 310 K

Surrounding temperature Ts = 300 K

Entropy change for Resistor, heat lost due to the resistance to the surrounding then Q = -ve

(ΔS)syst = - Q/T = - 2500 J/310K = - 8.064 J/K

Entropy change for the system: here heat gain from the resistor, Q = +ve

(ΔS)surr = +Q/Ts = 2500J/300K = 8.333 J/K

Total Entropy generation :

(ΔS)tot = (ΔS)syst + (ΔS) Surr = -8.064 + 8.333 = 0.268 J/K

Learn more about entropy here:- brainly.com/question/6364271

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3 0

2 years ago

True or False: It would be easier to run on a planet with high gravity than one with less gravity.

LUCKY_DIMON [66]

True! It would be easier

3 0

3 years ago

A boat has a mass of 6800 kg. its engines generate a drive force of 4100 n, due west, while the wind exerts a force of 830 n, du

erastova [34]

Let positive be west and negative be east because they are contrasting in directions.

The forces are 4100, -830, and -1200

The sum of the forces is 4100 – 830 – 1200 = 2070 N.

Newton’s law F = ma is used.
2070 = 6800 a

Isolating a will give us 2070 / 6800 = a

a = 0.34 m/s^2

5 0

3 years ago

Which of the following equations defines the law of conservation of energy?

Blababa [14]

Answer:

Total energy =kinetic energy +potential energy.

7 0

3 years ago

A car is traveling with an initial velocity of 15 m/s when the driver decides to go faster by accelerating at 5 m/s squared for

tiny-mole [99]

Answer:

x = 400 [m]

Explanation:

To solve this problem we must use the following kinematics equations, first, we find the final speed, and then we proceed to find the distance traveled.

$v_{f}=v_{i} +(a*t)\\$

where:

Vf = final velocity [m/s]

Vi = initial velocity = 15 [m/s]

a = acceleration = 5 [m/s^2]

t = time = 10 [s]

Note: the positive sign in the Equation indicates that the car is accelerating, i.e. its speed is increasing.

<u>Now replacing</u>

Vf = 15 + (5*10)

Vf = 65 [m/s]

Now using the second equation:

$v_{f} ^{2}= v_{i} ^{2}+(2*a*x)$

where:

x = distance traveled [m]

x = (65^2 - 15^2)/ (2*5)

x = 400 [m]

8 0

4 years ago