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Mars2501 [29]
3 years ago
15

5. A chemist observes that the iron fence outside his home has changed color and texture over time. Which would be a testable sc

ientific question the scientist could ask? (2.5 Points) What will my neighbors think of me if I do not replace the fence? What could I have done to prevent the fence from changing color and texture? Will my friends think the fence is ugly? Which looks better, an iron fence or a wooden fence?​
Physics
1 answer:
svetoff [14.1K]3 years ago
3 0

Answer:

What could have possibly turned the iron fence into a different texture and  color. What chemical reaction has taken place in order to change the texture and color of the iron fence? If you live in a wealthy neighborhood, then chances are, they might think it looks lazy. Weather, Rainstorms, and high humidity cause iron fences to rust. You can probably repaint the fence a different color. As long as your friends aren't harsh with you, I don't think they'll think it's ugly. I would prefer a wooden fence and then repaint it from there.

Explanation:

I hope this helps :)

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If we increase the temperature in a reactor by 54degrees Fahrenheit​ [°F], how many degrees Celsius​ [°C] will the temperature​
guajiro [1.7K]

Answer:

If we increase the temperature in a reactor by 54 degrees Fahrenheit​ [54°F], the temperature will increase by 12.22 degrees Celsius [12.22 ⁰C]

Explanation:

To determine the number of degrees Celsius the temperature will be increased, we convert from Fahrenheit to Celsius.

Converting from Fahrenheit to degree Celsius

54°F -----> °C

54 = 1.8°C + 32

54-32 = 1.8°C

22 = 1.8°C

°C = 22/1.8

    = 12.22 °C

Thus, 54°F -----> 12.22 °C

Therefore, If we increase the temperature in a reactor by 54degrees Fahrenheit​ [54°F], the temperature will increase by 12.22 degrees Celsius [12.22 ⁰C]

4 0
4 years ago
Read 2 more answers
Kinetic energy of 110 j and velocity of 70 m/s what is the mass
VARVARA [1.3K]

Answer:

0.04kg

Explanation:

Explanation in pics:

The formula for kinetic energy is KE = 1/2mv². So now the question asks for the mass, not KE. So we need to rearrange the formula so that we are calculating the mass. So, the formula for mass is m=KE/(1/2v²). Now we just substitute the values into the formula. Then just follow what it shows in the pic

7 0
3 years ago
A horizontal spring is lying on a frictionless surface. One end of the spring is attaches to a wall while the other end is conne
JulsSmile [24]

Answer:

v_f = 1.05 m/s

Explanation:

From conservation of energy;

E_f = E_i

Thus,

(1/2)m(v_f)² + (1/2)I(ω_f)² + m•g•h_f + (1/2)k•(x_f)² = (1/2)m(v_i)² + (1/2)I(ω_i)² + m•g•h_i + (1/2)k•(x_i)²

This reduces to;

(1/2)m(v_f)² + (1/2)Ik(x_f)² = (1/2)k•(x_i)²

Making v_f the subject, we have;

v_f = [√(k/m)] * [√((x_i)² - (x_f)²)]

We know that ω = √(k/m)

Thus,

v_f = ω[√((x_i)² - (x_f)²)]

Plugging in the relevant values to obtain;

v_f = 17.8[√((0.068)² - (0.034)²)]

v_f = 17.8[0.059] = 1.05 m/s

3 0
3 years ago
Do x and y have a proportional relationship?
Alja [10]

Answer:

no they don't

Explanation:

6 0
3 years ago
If Joe rides south on his bicycle in a straight line for 15 min with a average speed of 12.5 Km/h, how far has he ridden?
Olegator [25]
Using Dimensional analysis
15min/1·1hr/60min
15/1·1hr/60=15/60hr
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3 0
3 years ago
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