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algol [13]
3 years ago
9

Mining would be classified as a _____ human activity for the environment. Positive or negative

Physics
2 answers:
KATRIN_1 [288]3 years ago
6 0
Positive in sense that we get resources
negative in sense environment gets dirty negative maybe
maxonik [38]3 years ago
3 0

Answer:

do human activity for the

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Continuing education opportunities allow adults to
fgiga [73]

Continuing education opportunities allow adults to improve their skills, complete their education and also to change careers.

Answer: Option D

<u>Explanation: </u>

As we continue our education for higher studies we can learn new things. We can improve our skills by going for higher studies. Some people have a break in their education and they can also continue their education after sometime to complete their course.

So, it helps them to cater their needs and enhance their knowledge. Also when we go for higher studies, we get to know other things about the subject and can try for different career choices. Also, we can even change our ongoing career if we go for higher education and find some other career more interesting and profitable than the existing ones.

6 0
4 years ago
Read 2 more answers
If the total resistance of an air conditioner is 25.4 Ω and it is using energy at a rate of 2083 W, on what voltage is it operat
strojnjashka [21]
One of the formulas for calculating electrical power is

Power = (voltage)² / (resistance)

Since this problem wants us to find the voltage, let's
re-arrange the formula.
Multiply each side by (resistance):

(Voltage)² = (power) x (resistance)

Take the square root of each side:

Voltage = √ (power x resistance)

THERE's the formula we can use to find the voltage for this problem.

Voltage = √ (2,083 W x 25.4 Ω)

Voltage = √ (52,908.2 W-Ω )

Voltage = 230 volts
6 0
4 years ago
A fan spins at 6.0 rev/s. You turn it off, and it slows at 1.0 rev/s2. What is the angular displacement before it stops
Komok [63]

Answer:

Angular displacement before it stops = 18 rev

Explanation:

Given:

Speed of fan w(i) = 6 rev/s

Speed of fan (Slow) ∝ = 1 rev/s

Final speed of fan w(f) = 0 rev/s

Find:

Angular displacement before it stops

Computation:

w(f)² = w(i) + 2∝θ

0² = 6² + 2(1)θ

0 = 36 + 2θ

2θ = -36

Angular displacement before it stops = -36 / 2

θ = -18

Angular displacement before it stops = 18 rev

4 0
3 years ago
A particular car engine operates between temperatures of 440°C (inside the cylinders of the engine) and 20°C (the temperature of
Step2247 [10]

One of the concepts to be used to solve this problem is that of thermal efficiency, that is, that coefficient or dimensionless ratio calculated as the ratio of the energy produced and the energy supplied to the machine.

From the temperature the value is given as

\eta = 1-\frac{T_L}{T_H}

Where,

T_L = Cold focus temperature

T_H = Hot spot temperature

Our values are given as,

T_L = 20\° C = (20+273) K = 293 K

T_H = 440\° C = (440+273) K = 713 K

Replacing we have,

\eta = 1-\frac{T_L}{T_H}

\eta = 1-\frac{293}{713}

\eta = 0.589

Therefore the maximum possible efficiency the car can have is 58.9%

4 0
3 years ago
16. How much does the gravitational potential
STALIN [3.7K]

Answer:

El uso mas común de la energía potencial gravitacional, se da en los objetos cercanos a la superficie de la Tierra donde la aceleración gravitacional, se puede presumir que es constante y vale alrededor de 9.8 m/s2.

Explanation:

6 0
3 years ago
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